From patchwork Thu Sep 27 11:39:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617853 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6E30D175A for ; Thu, 27 Sep 2018 11:45:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59BFF2B238 for ; Thu, 27 Sep 2018 11:45:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A04F2B23C; Thu, 27 Sep 2018 11:45:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 953632B238 for ; 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Thu, 27 Sep 2018 13:40:11 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:10 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 1/7] dt-bindings: mfd: Add ST Multi-Function eXpander (STMFX) core bindings Date: Thu, 27 Sep 2018 13:39:58 +0200 Message-ID: <1538048404-9041-2-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044051_730787_74739836 X-CRM114-Status: GOOD ( 12.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds documentation of device tree bindings for the STMicroelectronics Multi-Function eXpander (STMFX) MFD core. Signed-off-by: Amelie Delaunay Reviewed-by: Linus Walleij Reviewed-by: Rob Herring --- Documentation/devicetree/bindings/mfd/stmfx.txt | 28 +++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/stmfx.txt diff --git a/Documentation/devicetree/bindings/mfd/stmfx.txt b/Documentation/devicetree/bindings/mfd/stmfx.txt new file mode 100644 index 0000000..f0c2f7f --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/stmfx.txt @@ -0,0 +1,28 @@ +STMicroelectonics Multi-Function eXpander (STMFX) Core bindings + +ST Multi-Function eXpander (STMFX) is a slave controller using I2C for +communication with the main MCU. Its main features are GPIO expansion, main +MCU IDD measurement (IDD is the amount of current that flows through VDD) and +resistive touchscreen controller. + +Required properties: +- compatible: should be "st,stmfx-0300". +- reg: I2C slave address of the device. +- interrupts: interrupt specifier triggered by MFX_IRQ_OUT signal. + Please refer to ../interrupt-controller/interrupt.txt + +Optional properties: +- drive-open-drain: configure MFX_IRQ_OUT as open drain. +- vdd-supply: phandle of the regulator supplying STMFX. + +Example: + + stmfx: stmfx@42 { + compatible = "st,stmfx-0300"; + reg = <0x42>; + interrupts = <8 IRQ_TYPE_EDGE_RISING>; + interrupt-parent = <&gpioi>; + vdd-supply = <&v3v3>; + }; + +Please refer to ../pinctrl/pinctrl-stmfx.txt for STMFX GPIO expander function bindings. 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Thu, 27 Sep 2018 13:40:15 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:14 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 2/7] mfd: Add ST Multi-Function eXpander (STMFX) core driver Date: Thu, 27 Sep 2018 13:39:59 +0200 Message-ID: <1538048404-9041-3-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044051_849723_0CB2DCF9 X-CRM114-Status: GOOD ( 24.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP STMicroelectronics Multi-Function eXpander (STMFX) is a slave controller using I2C for communication with the main MCU. Main features are: - 16 fast GPIOs individually configurable in input/output - 8 alternate GPIOs individually configurable in input/output when other STMFX functions are not used - Main MCU IDD measurement - Resistive touchscreen controller Signed-off-by: Amelie Delaunay Reviewed-by: Linus Walleij --- drivers/mfd/Kconfig | 14 ++ drivers/mfd/Makefile | 2 +- drivers/mfd/stmfx.c | 626 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/stmfx.h | 27 ++ 4 files changed, 668 insertions(+), 1 deletion(-) create mode 100644 drivers/mfd/stmfx.c create mode 100644 include/linux/mfd/stmfx.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index f3a5f8d..8c41342 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1862,6 +1862,20 @@ config MFD_STM32_TIMERS for PWM and IIO Timer. This driver allow to share the registers between the others drivers. +config MFD_STMFX + tristate "Support for STMicroelectronics Multi-Function eXpander (STMFX)" + depends on I2C + depends on OF || COMPILE_TEST + select MFD_CORE + select REGMAP_I2C + help + Support for the STMicroelectronics Multi-Function eXpander. + + This driver provides common support for accessing the device, + additional drivers must be enabled in order to use the functionality + of the device. + + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5856a94..282323b 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -240,4 +240,4 @@ obj-$(CONFIG_MFD_MXS_LRADC) += mxs-lradc.o obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc27xx-spi.o obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o - +obj-$(CONFIG_MFD_STMFX) += stmfx.o diff --git a/drivers/mfd/stmfx.c b/drivers/mfd/stmfx.c new file mode 100644 index 0000000..cfd4fca --- /dev/null +++ b/drivers/mfd/stmfx.c @@ -0,0 +1,626 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for STMicroelectronics Multi-Function eXpander (STMFX) core + * + * Copyright (C) 2018 STMicroelectronics + * Author(s): Amelie Delaunay . + */ +#include +#include +#include +#include +#include +#include +#include +#include + +/* General */ +#define STMFX_REG_CHIP_ID 0x00 /* R */ +#define STMFX_REG_FW_VERSION_MSB 0x01 /* R */ +#define STMFX_REG_FW_VERSION_LSB 0x02 /* R */ +#define STMFX_REG_SYS_CTRL 0x40 /* RW */ +/* IRQ output management */ +#define STMFX_REG_IRQ_OUT_PIN 0x41 /* RW */ +#define STMFX_REG_IRQ_SRC_EN 0x42 /* RW */ +#define STMFX_REG_IRQ_PENDING 0x08 /* R */ +#define STMFX_REG_IRQ_ACK 0x44 /* RW */ +/* GPIO management */ +#define STMFX_REG_IRQ_GPI_PENDING1 0x0C /* R */ +#define STMFX_REG_IRQ_GPI_PENDING2 0x0D /* R */ +#define STMFX_REG_IRQ_GPI_PENDING3 0x0E /* R */ +#define STMFX_REG_GPIO_STATE1 0x10 /* R */ +#define STMFX_REG_GPIO_STATE2 0x11 /* R */ +#define STMFX_REG_GPIO_STATE3 0x12 /* R */ +#define STMFX_REG_IRQ_GPI_SRC1 0x48 /* RW */ +#define STMFX_REG_IRQ_GPI_SRC2 0x49 /* RW */ +#define STMFX_REG_IRQ_GPI_SRC3 0x4A /* RW */ +#define STMFX_REG_GPO_SET1 0x6C /* RW */ +#define STMFX_REG_GPO_SET2 0x6D /* RW */ +#define STMFX_REG_GPO_SET3 0x6E /* RW */ +#define STMFX_REG_GPO_CLR1 0x70 /* RW */ +#define STMFX_REG_GPO_CLR2 0x71 /* RW */ +#define STMFX_REG_GPO_CLR3 0x72 /* RW */ + +#define STMFX_REG_MAX 0xB0 + +/* MFX boot time is around 10ms, so after reset, we have to wait this delay */ +#define STMFX_BOOT_TIME_MS 10 + +/* STMFX_REG_CHIP_ID bitfields */ +#define STMFX_REG_CHIP_ID_MASK GENMASK(7, 0) + +/* STMFX_REG_SYS_CTRL bitfields */ +#define STMFX_REG_SYS_CTRL_GPIO_EN BIT(0) +#define STMFX_REG_SYS_CTRL_TS_EN BIT(1) +#define STMFX_REG_SYS_CTRL_IDD_EN BIT(2) +#define STMFX_REG_SYS_CTRL_ALTGPIO_EN BIT(3) +#define STMFX_REG_SYS_CTRL_SWRST BIT(7) + +/* STMFX_REG_IRQ_OUT_PIN bitfields */ +#define STMFX_REG_IRQ_OUT_PIN_TYPE BIT(0) /* 0-OD 1-PP */ +#define STMFX_REG_IRQ_OUT_PIN_POL BIT(1) /* 0-active LOW 1-active HIGH */ + +/* STMFX_REG_IRQ_(SRC_EN/PENDING/ACK) bit shift */ +enum stmfx_irqs { + STMFX_REG_IRQ_SRC_EN_GPIO = 0, + STMFX_REG_IRQ_SRC_EN_IDD, + STMFX_REG_IRQ_SRC_EN_ERROR, + STMFX_REG_IRQ_SRC_EN_TS_DET, + STMFX_REG_IRQ_SRC_EN_TS_NE, + STMFX_REG_IRQ_SRC_EN_TS_TH, + STMFX_REG_IRQ_SRC_EN_TS_FULL, + STMFX_REG_IRQ_SRC_EN_TS_OVF, + STMFX_REG_IRQ_SRC_MAX, +}; + +/** + * struct stmfx_ddata - STMFX MFD private structure + * @stmfx: state holder with device for logs and register map + * @vdd: STMFX power supply + * @irq_domain: IRQ domain + * @lock: IRQ bus lock + * @irq_src: cache of IRQ_SRC_EN register for bus_lock + * @bkp_sysctrl: backup of SYS_CTRL register for suspend/resume + * @bkp_irqoutpin: backup of IRQ_OUT_PIN register for suspend/resume + */ +struct stmfx_ddata { + struct stmfx *stmfx; + struct regulator *vdd; + struct irq_domain *irq_domain; + struct mutex lock; /* IRQ bus lock */ + u8 irq_src; +#ifdef CONFIG_PM + u8 bkp_sysctrl; + u8 bkp_irqoutpin; +#endif +}; + +static u8 stmfx_func_to_mask(u32 func) +{ + u8 mask = 0; + + if (func & STMFX_FUNC_GPIO) + mask |= STMFX_REG_SYS_CTRL_GPIO_EN; + + if ((func & STMFX_FUNC_ALTGPIO_LOW) || (func & STMFX_FUNC_ALTGPIO_HIGH)) + mask |= STMFX_REG_SYS_CTRL_ALTGPIO_EN; + + if (func & STMFX_FUNC_TS) + mask |= STMFX_REG_SYS_CTRL_TS_EN; + + if (func & STMFX_FUNC_IDD) + mask |= STMFX_REG_SYS_CTRL_IDD_EN; + + return mask; +} + +int stmfx_function_enable(struct stmfx *stmfx, u32 func) +{ + u32 sys_ctrl; + u8 mask; + int ret; + + ret = regmap_read(stmfx->map, STMFX_REG_SYS_CTRL, &sys_ctrl); + if (ret) + return ret; + + /* + * IDD and TS have priority in STMFX FW, so if IDD and TS are enabled, + * ALTGPIO function is disabled by STMFX FW. If IDD or TS is enabled, + * the number of aGPIO available decreases. To avoid GPIO management + * disturbance, abort IDD or TS function enable in this case. + */ + if (((func & STMFX_FUNC_IDD) || (func & STMFX_FUNC_TS)) && + (sys_ctrl & STMFX_REG_SYS_CTRL_ALTGPIO_EN)) { + dev_err(stmfx->dev, "ALTGPIO function already enabled\n"); + return -EBUSY; + } + + /* If TS is enabled, aGPIO[3:0] cannot be used */ + if ((func & STMFX_FUNC_ALTGPIO_LOW) && + (sys_ctrl & STMFX_REG_SYS_CTRL_TS_EN)) { + dev_err(stmfx->dev, "TS in use, aGPIO[3:0] unavailable\n"); + return -EBUSY; + } + + /* If IDD is enabled, aGPIO[7:4] cannot be used */ + if ((func & STMFX_FUNC_ALTGPIO_HIGH) && + (sys_ctrl & STMFX_REG_SYS_CTRL_IDD_EN)) { + dev_err(stmfx->dev, "IDD in use, aGPIO[7:4] unavailable\n"); + return -EBUSY; + } + + mask = stmfx_func_to_mask(func); + + return regmap_update_bits(stmfx->map, STMFX_REG_SYS_CTRL, mask, mask); +} +EXPORT_SYMBOL_GPL(stmfx_function_enable); + +int stmfx_function_disable(struct stmfx *stmfx, u32 func) +{ + u8 mask = stmfx_func_to_mask(func); + + return regmap_update_bits(stmfx->map, STMFX_REG_SYS_CTRL, mask, 0); +} +EXPORT_SYMBOL_GPL(stmfx_function_disable); + +static void stmfx_irq_bus_lock(struct irq_data *data) +{ + struct stmfx_ddata *ddata = irq_data_get_irq_chip_data(data); + + mutex_lock(&ddata->lock); +} + +static void stmfx_irq_bus_sync_unlock(struct irq_data *data) +{ + struct stmfx_ddata *ddata = irq_data_get_irq_chip_data(data); + + regmap_write(ddata->stmfx->map, STMFX_REG_IRQ_SRC_EN, ddata->irq_src); + + mutex_unlock(&ddata->lock); +} + +static void stmfx_irq_mask(struct irq_data *data) +{ + struct stmfx_ddata *ddata = irq_data_get_irq_chip_data(data); + + ddata->irq_src &= ~BIT(data->hwirq % 8); +} + +static void stmfx_irq_unmask(struct irq_data *data) +{ + struct stmfx_ddata *ddata = irq_data_get_irq_chip_data(data); + + ddata->irq_src |= BIT(data->hwirq % 8); +} + +static struct irq_chip stmfx_irq_chip = { + .name = "stmfx-core", + .irq_bus_lock = stmfx_irq_bus_lock, + .irq_bus_sync_unlock = stmfx_irq_bus_sync_unlock, + .irq_mask = stmfx_irq_mask, + .irq_unmask = stmfx_irq_unmask, +}; + +static irqreturn_t stmfx_irq_handler(int irq, void *data) +{ + struct stmfx_ddata *ddata = data; + unsigned long n, pending; + u32 ack; + int ret; + + ret = regmap_read(ddata->stmfx->map, STMFX_REG_IRQ_PENDING, + (u32 *)&pending); + if (ret) + return IRQ_NONE; + + /* + * There is no ACK for GPIO, MFX_REG_IRQ_PENDING_GPIO is a logical OR + * of MFX_REG_IRQ_GPI _PENDING1/_PENDING2/_PENDING3 + */ + ack = pending & ~BIT(STMFX_REG_IRQ_SRC_EN_GPIO); + if (ack) { + ret = regmap_write(ddata->stmfx->map, STMFX_REG_IRQ_ACK, ack); + if (ret) + return IRQ_NONE; + } + + for_each_set_bit(n, &pending, STMFX_REG_IRQ_SRC_MAX) + handle_nested_irq(irq_find_mapping(ddata->irq_domain, n)); + + return IRQ_HANDLED; +} + +static int stmfx_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) +{ + irq_set_chip_data(virq, d->host_data); + irq_set_chip_and_handler(virq, &stmfx_irq_chip, handle_simple_irq); + irq_set_nested_thread(virq, 1); + irq_set_noprobe(virq); + + return 0; +} + +static void stmfx_irq_unmap(struct irq_domain *d, unsigned int virq) +{ + irq_set_chip_and_handler(virq, NULL, NULL); + irq_set_chip_data(virq, NULL); +} + +static const struct irq_domain_ops stmfx_irq_ops = { + .map = stmfx_irq_map, + .unmap = stmfx_irq_unmap, +}; + +static void stmfx_irq_exit(struct stmfx_ddata *ddata) +{ + int hwirq; + + for (hwirq = 0; hwirq < STMFX_REG_IRQ_SRC_MAX; hwirq++) + irq_dispose_mapping(irq_find_mapping(ddata->irq_domain, hwirq)); + irq_domain_remove(ddata->irq_domain); +} + +static int stmfx_irq_init(struct stmfx_ddata *ddata, int irq) +{ + struct device *dev = ddata->stmfx->dev; + u32 irqoutpin = 0, irqtrigger; + int ret; + + ddata->irq_domain = irq_domain_add_simple(dev->of_node, + STMFX_REG_IRQ_SRC_MAX, 0, + &stmfx_irq_ops, ddata); + if (!ddata->irq_domain) { + dev_err(dev, "failed to create irq domain\n"); + return -EINVAL; + } + + if (!of_property_read_bool(dev->of_node, "drive-open-drain")) + irqoutpin |= STMFX_REG_IRQ_OUT_PIN_TYPE; + + irqtrigger = irq_get_trigger_type(irq); + if ((irqtrigger & IRQ_TYPE_EDGE_RISING) || + (irqtrigger & IRQ_TYPE_LEVEL_HIGH)) + irqoutpin |= STMFX_REG_IRQ_OUT_PIN_POL; + + ret = regmap_write(ddata->stmfx->map, STMFX_REG_IRQ_OUT_PIN, irqoutpin); + if (ret) + return ret; + + ret = devm_request_threaded_irq(dev, irq, NULL, stmfx_irq_handler, + irqtrigger | IRQF_ONESHOT, + "stmfx", ddata); + if (ret) + stmfx_irq_exit(ddata); + + return ret; +} + +static int stmfx_chip_reset(struct stmfx_ddata *ddata) +{ + int ret; + + ret = regmap_write(ddata->stmfx->map, STMFX_REG_SYS_CTRL, + STMFX_REG_SYS_CTRL_SWRST); + if (ret) + return ret; + + msleep(STMFX_BOOT_TIME_MS); + + return ret; +} + +static int stmfx_chip_init(struct stmfx_ddata *ddata, struct i2c_client *client) +{ + u32 id; + u8 version[2]; + int ret; + + ddata->vdd = devm_regulator_get_optional(&client->dev, "vdd"); + if (IS_ERR(ddata->vdd)) { + ret = PTR_ERR(ddata->vdd); + if (ret != -ENODEV) { + if (ret != -EPROBE_DEFER) + dev_err(&client->dev, + "no vdd regulator found:%d\n", ret); + return ret; + } + } + + if (!IS_ERR(ddata->vdd)) { + ret = regulator_enable(ddata->vdd); + if (ret) { + dev_err(&client->dev, "vdd enable failed: %d\n", ret); + return ret; + } + } + + ret = regmap_read(ddata->stmfx->map, STMFX_REG_CHIP_ID, &id); + if (ret) { + dev_err(&client->dev, "error reading chip id: %d\n", ret); + goto err; + } + + /* + * Check that ID is the complement of the I2C address: + * STMFX I2C address follows the 7-bit format (MSB), that's why + * client->addr is shifted. + * + * STMFX_I2C_ADDR| STMFX | Linux + * input pin | I2C device address | I2C device address + *--------------------------------------------------------- + * 0 | b: 1000 010x h:0x84 | 0x42 + * 1 | b: 1000 011x h:0x86 | 0x43 + */ + if (FIELD_GET(STMFX_REG_CHIP_ID_MASK, ~id) != (client->addr << 1)) { + dev_err(&client->dev, "unknown chip id: %#x\n", id); + ret = -EINVAL; + goto err; + } + + ret = regmap_bulk_read(ddata->stmfx->map, STMFX_REG_FW_VERSION_MSB, + version, ARRAY_SIZE(version)); + if (ret) { + dev_err(&client->dev, "error reading fw version: %d\n", ret); + goto err; + } + + dev_info(&client->dev, "STMFX id: %#x, fw version: %x.%02x\n", + id, version[0], version[1]); + + return stmfx_chip_reset(ddata); + +err: + if (!IS_ERR(ddata->vdd)) + return regulator_disable(ddata->vdd); + + return ret; +} + +static int stmfx_chip_exit(struct stmfx_ddata *ddata) +{ + regmap_write(ddata->stmfx->map, STMFX_REG_IRQ_SRC_EN, 0); + regmap_write(ddata->stmfx->map, STMFX_REG_SYS_CTRL, 0); + + if (!IS_ERR(ddata->vdd)) + return regulator_disable(ddata->vdd); + + return 0; +} + +static const struct resource stmfx_pinctrl_resources[] = { + DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_GPIO), +}; + +static struct mfd_cell stmfx_cells[] = { + { + .of_compatible = "st,stmfx-0300-pinctrl", + .name = "stmfx-pinctrl", + .resources = stmfx_pinctrl_resources, + .num_resources = ARRAY_SIZE(stmfx_pinctrl_resources), + } +}; + +static bool stmfx_reg_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case STMFX_REG_SYS_CTRL: + case STMFX_REG_IRQ_SRC_EN: + case STMFX_REG_IRQ_PENDING: + case STMFX_REG_IRQ_GPI_PENDING1: + case STMFX_REG_IRQ_GPI_PENDING2: + case STMFX_REG_IRQ_GPI_PENDING3: + case STMFX_REG_GPIO_STATE1: + case STMFX_REG_GPIO_STATE2: + case STMFX_REG_GPIO_STATE3: + case STMFX_REG_IRQ_GPI_SRC1: + case STMFX_REG_IRQ_GPI_SRC2: + case STMFX_REG_IRQ_GPI_SRC3: + case STMFX_REG_GPO_SET1: + case STMFX_REG_GPO_SET2: + case STMFX_REG_GPO_SET3: + case STMFX_REG_GPO_CLR1: + case STMFX_REG_GPO_CLR2: + case STMFX_REG_GPO_CLR3: + return true; + default: + return false; + } +} + +static bool stmfx_reg_writeable(struct device *dev, unsigned int reg) +{ + return (reg >= STMFX_REG_SYS_CTRL); +} + +static const struct regmap_config stmfx_regmap_config = { + .reg_bits = 8, + .reg_stride = 1, + .val_bits = 8, + .max_register = STMFX_REG_MAX, + .volatile_reg = stmfx_reg_volatile, + .writeable_reg = stmfx_reg_writeable, + .cache_type = REGCACHE_RBTREE, +}; + +static int stmfx_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct stmfx_ddata *ddata; + int i, ret; + + ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + /* State holder */ + ddata->stmfx = devm_kzalloc(dev, sizeof(*ddata->stmfx), GFP_KERNEL); + if (!ddata->stmfx) + return -ENOMEM; + + i2c_set_clientdata(client, ddata); + + ddata->stmfx->dev = dev; + + ddata->stmfx->map = devm_regmap_init_i2c(client, &stmfx_regmap_config); + if (IS_ERR(ddata->stmfx->map)) { + ret = PTR_ERR(ddata->stmfx->map); + dev_err(dev, "failed to allocate register map: %d\n", ret); + return ret; + } + + mutex_init(&ddata->lock); + + ret = stmfx_chip_init(ddata, client); + if (ret) { + if (ret == -ETIMEDOUT) + return -EPROBE_DEFER; + return ret; + } + + if (client->irq < 0) { + dev_err(dev, "failed to get irq: %d\n", client->irq); + ret = client->irq; + goto err_chip_exit; + } + + ret = stmfx_irq_init(ddata, client->irq); + if (ret) + goto err_chip_exit; + + for (i = 0; i < ARRAY_SIZE(stmfx_cells); i++) { + stmfx_cells[i].platform_data = ddata->stmfx; + stmfx_cells[i].pdata_size = sizeof(struct stmfx); + } + + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, + stmfx_cells, ARRAY_SIZE(stmfx_cells), NULL, + 0, ddata->irq_domain); + if (ret) + goto err_irq_exit; + + return 0; + +err_irq_exit: + stmfx_irq_exit(ddata); +err_chip_exit: + stmfx_chip_exit(ddata); + + return ret; +} + +static int stmfx_remove(struct i2c_client *client) +{ + struct stmfx_ddata *ddata = i2c_get_clientdata(client); + + stmfx_irq_exit(ddata); + + return stmfx_chip_exit(ddata); +} + +#ifdef CONFIG_PM_SLEEP +static int stmfx_backup_regs(struct stmfx_ddata *ddata) +{ + int ret; + + ret = regmap_raw_read(ddata->stmfx->map, STMFX_REG_SYS_CTRL, + &ddata->bkp_sysctrl, sizeof(ddata->bkp_sysctrl)); + if (ret) + return ret; + ret = regmap_raw_read(ddata->stmfx->map, STMFX_REG_IRQ_OUT_PIN, + &ddata->bkp_irqoutpin, + sizeof(ddata->bkp_irqoutpin)); + if (ret) + return ret; + + return 0; +} + +static int stmfx_restore_regs(struct stmfx_ddata *ddata) +{ + int ret; + + ret = regmap_raw_write(ddata->stmfx->map, STMFX_REG_SYS_CTRL, + &ddata->bkp_sysctrl, sizeof(ddata->bkp_sysctrl)); + if (ret) + return ret; + ret = regmap_raw_write(ddata->stmfx->map, STMFX_REG_IRQ_OUT_PIN, + &ddata->bkp_irqoutpin, + sizeof(ddata->bkp_irqoutpin)); + if (ret) + return ret; + ret = regmap_raw_write(ddata->stmfx->map, STMFX_REG_IRQ_SRC_EN, + &ddata->irq_src, sizeof(ddata->irq_src)); + if (ret) + return ret; + + return 0; +} + +static int stmfx_suspend(struct device *dev) +{ + struct stmfx_ddata *ddata = dev_get_drvdata(dev); + int ret; + + ret = stmfx_backup_regs(ddata); + if (ret) { + dev_err(ddata->stmfx->dev, "registers backup failure\n"); + return ret; + } + + if (!IS_ERR(ddata->vdd)) { + ret = regulator_disable(ddata->vdd); + if (ret) + return ret; + } + + return 0; +} + +static int stmfx_resume(struct device *dev) +{ + struct stmfx_ddata *ddata = dev_get_drvdata(dev); + int ret; + + if (!IS_ERR(ddata->vdd)) { + ret = regulator_enable(ddata->vdd); + if (ret) { + dev_err(ddata->stmfx->dev, + "vdd enable failed: %d\n", ret); + return ret; + } + } + + ret = stmfx_restore_regs(ddata); + if (ret) { + dev_err(ddata->stmfx->dev, "registers restoration failure\n"); + return ret; + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(stmfx_dev_pm_ops, stmfx_suspend, stmfx_resume); + +static const struct of_device_id stmfx_of_match[] = { + { .compatible = "st,stmfx-0300", }, + {}, +}; +MODULE_DEVICE_TABLE(of, stmfx_of_match); + +static struct i2c_driver stmfx_driver = { + .driver = { + .name = "stmfx-core", + .of_match_table = of_match_ptr(stmfx_of_match), + .pm = &stmfx_dev_pm_ops, + }, + .probe = stmfx_probe, + .remove = stmfx_remove, +}; +module_i2c_driver(stmfx_driver); + +MODULE_DESCRIPTION("STMFX core driver"); +MODULE_AUTHOR("Amelie Delaunay "); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/stmfx.h b/include/linux/mfd/stmfx.h new file mode 100644 index 0000000..35c3d42 --- /dev/null +++ b/include/linux/mfd/stmfx.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 STMicroelectronics + * Author(s): Amelie Delaunay . + */ + +#ifndef MFD_STMFX_H +#define MFX_STMFX_H + +#include + +enum stmfx_functions { + STMFX_FUNC_GPIO = BIT(0), /* GPIO[15:0] */ + STMFX_FUNC_ALTGPIO_LOW = BIT(1), /* aGPIO[3:0] */ + STMFX_FUNC_ALTGPIO_HIGH = BIT(2), /* aGPIO[7:4] */ + STMFX_FUNC_TS = BIT(3), + STMFX_FUNC_IDD = BIT(4), +}; + +struct stmfx { + struct device *dev; + struct regmap *map; +}; + +int stmfx_function_enable(struct stmfx *stmfx, u32 func); +int stmfx_function_disable(struct stmfx *stmfx, u32 func); +#endif From patchwork Thu Sep 27 11:40:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617847 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 08B51913 for ; 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Thu, 27 Sep 2018 13:40:17 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6A10431; Thu, 27 Sep 2018 11:40:16 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas23.st.com [10.75.90.46]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 449502986; Thu, 27 Sep 2018 11:40:16 +0000 (GMT) Received: from SAFEX1HUBCAS24.st.com (10.75.90.95) by SAFEX1HUBCAS23.st.com (10.75.90.46) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:16 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:15 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 3/7] dt-bindings: pinctrl: document the STMFX pinctrl bindings Date: Thu, 27 Sep 2018 13:40:00 +0200 Message-ID: <1538048404-9041-4-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044050_861912_7CBD2495 X-CRM114-Status: GOOD ( 16.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds documentation of device tree bindings for the STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander. Signed-off-by: Amelie Delaunay Reviewed-by: Linus Walleij Reviewed-by: Rob Herring --- .../devicetree/bindings/pinctrl/pinctrl-stmfx.txt | 116 +++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt new file mode 100644 index 0000000..c1b4c18 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-stmfx.txt @@ -0,0 +1,116 @@ +STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander bindings + +ST Multi-Function eXpander (STMFX) offers up to 24 GPIOs expansion. +Please refer to ../mfd/stmfx.txt for STMFX Core bindings. + +Required properties: +- compatible: should be "st,stmfx-0300-pinctrl". +- #gpio-cells: should be <2>, the first cell is the GPIO number and the second + cell is the gpio flags in accordance with . +- gpio-controller: marks the device as a GPIO controller. +- #interrupt-cells: should be <2>, the first cell is the GPIO number and the + second cell is the interrupt flags in accordance with + . +- interrupt-controller: marks the device as an interrupt controller. +- gpio-ranges: specifies the mapping between gpio controller and pin + controller pins. Check "Concerning gpio-ranges property" below. +Please refer to ../gpio/gpio.txt. + +Please refer to pinctrl-bindings.txt for pin configuration. + +Required properties for pin configuration sub-nodes: +- pins: list of pins to which the configuration applies. + +Optional properties for pin configuration sub-nodes (pinconf-generic ones): +- bias-disable: disable any bias on the pin. +- bias-pull-up: the pin will be pulled up. +- bias-pull-pin-default: use the pin-default pull state. +- bias-pull-down: the pin will be pulled down. +- drive-open-drain: the pin will be driven with open drain. +- drive-push-pull: the pin will be driven actively high and low. +- output-high: the pin will be configured as an output driving high level. +- output-low: the pin will be configured as an output driving low level. + +Note that STMFX pins[15:0] are called "gpio[15:0]", and STMFX pins[23:16] are +called "agpio[7:0]". Example, to refer to pin 18 of STMFX, use "agpio2". + +Concerning gpio-ranges property: +- if all STMFX pins[24:0] are available (no other STMFX function in use), you + should use gpio-ranges = <&stmfx_pinctrl 0 0 24>; +- if agpio[3:0] are not available (STMFX Touchscreen function in use), you + should use gpio-ranges = <&stmfx_pinctrl 0 0 16>, <&stmfx_pinctrl 20 20 4>; +- if agpio[7:4] are not available (STMFX IDD function in use), you + should use gpio-ranges = <&stmfx_pinctrl 0 0 20>; + + +Example: + + stmfx: stmfx@42 { + ... + + stmfx_pinctrl: stmfx-pin-controller { + compatible = "st,stmfx-0300-pinctrl"; + #gpio-cells = <2>; + #interrupt-cells = <2>; + gpio-controller; + interrupt-controller; + gpio-ranges = <&stmfx_pinctrl 0 0 24>; + + joystick_pins: joystick { + pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4"; + drive-push-pull; + bias-pull-up; + }; + }; + }; + +Example of STMFX GPIO consumers: + + joystick { + compatible = "gpio-keys"; + #address-cells = <1>; + #size-cells = <0>; + pinctrl-0 = <&joystick_pins>; + pinctrl-names = "default"; + button-0 { + label = "JoySel"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <0 IRQ_TYPE_EDGE_RISING>; + }; + button-1 { + label = "JoyDown"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <1 IRQ_TYPE_EDGE_RISING>; + }; + button-2 { + label = "JoyLeft"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <2 IRQ_TYPE_EDGE_RISING>; + }; + button-3 { + label = "JoyRight"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <3 IRQ_TYPE_EDGE_RISING>; + }; + button-4 { + label = "JoyUp"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <4 IRQ_TYPE_EDGE_RISING>; + }; + }; + + leds { + compatible = "gpio-leds"; + orange { + gpios = <&stmfx_pinctrl 17 1>; + }; + + blue { + gpios = <&stmfx_pinctrl 19 1>; + }; + } From patchwork Thu Sep 27 11:40:01 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617859 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6DF4B175A for ; 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Thu, 27 Sep 2018 13:40:18 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id A203431; Thu, 27 Sep 2018 11:40:17 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6729E2986; Thu, 27 Sep 2018 11:40:17 +0000 (GMT) Received: from SAFEX1HUBCAS24.st.com (10.75.90.95) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:17 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:16 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 4/7] pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver Date: Thu, 27 Sep 2018 13:40:01 +0200 Message-ID: <1538048404-9041-5-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044050_901772_C7D5DAFA X-CRM114-Status: GOOD ( 21.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds pinctrl/GPIO driver for STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander. STMFX is an I2C slave controller, offering up to 24 GPIOs. The driver relies on generic pin config interface to configure the GPIOs. Signed-off-by: Amelie Delaunay Reviewed-by: Linus Walleij --- drivers/pinctrl/Kconfig | 12 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-stmfx.c | 821 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 834 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-stmfx.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index e86752b..bbd3908 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -244,6 +244,18 @@ config PINCTRL_ST select PINCONF select GPIOLIB_IRQCHIP +config PINCTRL_STMFX + tristate "STMicroelectronics STMFX GPIO expander pinctrl driver" + select GENERIC_PINCONF + select GPIOLIB_IRQCHIP + select MFD_STMFX + help + Driver for STMicroelectronics Multi-Function eXpander (STMFX) + GPIO expander. + This provides a GPIO interface supporting inputs and outputs, + and configuring push-pull, open-drain, and can also be used as + interrupt-controller. + config PINCTRL_U300 bool "U300 pin controller driver" depends on ARCH_U300 diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 46ef9bd..9abcaa59 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o obj-$(CONFIG_PINCTRL_LPC18XX) += pinctrl-lpc18xx.o obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o +obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o obj-$(CONFIG_PINCTRL_INGENIC) += pinctrl-ingenic.o obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c new file mode 100644 index 0000000..e253ed1 --- /dev/null +++ b/drivers/pinctrl/pinctrl-stmfx.c @@ -0,0 +1,821 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for STMicroelectronics Multi-Function eXpander (STMFX) GPIO expander + * + * Copyright (C) 2018 STMicroelectronics + * Author(s): Amelie Delaunay . + */ +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" +#include "pinctrl-utils.h" + +/* GPIOs expander */ +/* GPIO_STATE1 0x10, GPIO_STATE2 0x11, GPIO_STATE3 0x12 */ +#define STMFX_REG_GPIO_STATE 0x10 /* R */ +/* GPIO_DIR1 0x60, GPIO_DIR2 0x61, GPIO_DIR3 0x63 */ +#define STMFX_REG_GPIO_DIR 0x60 /* RW */ +/* GPIO_TYPE1 0x64, GPIO_TYPE2 0x65, GPIO_TYPE3 0x66 */ +#define STMFX_REG_GPIO_TYPE 0x64 /* RW */ +/* GPIO_PUPD1 0x68, GPIO_PUPD2 0x69, GPIO_PUPD3 0x6A */ +#define STMFX_REG_GPIO_PUPD 0x68 /* RW */ +/* GPO_SET1 0x6C, GPO_SET2 0x6D, GPO_SET3 0x6E */ +#define STMFX_REG_GPO_SET 0x6C /* RW */ +/* GPO_CLR1 0x70, GPO_CLR2 0x71, GPO_CLR3 0x72 */ +#define STMFX_REG_GPO_CLR 0x70 /* RW */ +/* IRQ_GPI_SRC1 0x48, IRQ_GPI_SRC2 0x49, IRQ_GPI_SRC3 0x4A */ +#define STMFX_REG_IRQ_GPI_SRC 0x48 /* RW */ +/* IRQ_GPI_EVT1 0x4C, IRQ_GPI_EVT2 0x4D, IRQ_GPI_EVT3 0x4E */ +#define STMFX_REG_IRQ_GPI_EVT 0x4C /* RW */ +/* IRQ_GPI_TYPE1 0x50, IRQ_GPI_TYPE2 0x51, IRQ_GPI_TYPE3 0x52 */ +#define STMFX_REG_IRQ_GPI_TYPE 0x50 /* RW */ +/* IRQ_GPI_PENDING1 0x0C, IRQ_GPI_PENDING2 0x0D, IRQ_GPI_PENDING3 0x0E*/ +#define STMFX_REG_IRQ_GPI_PENDING 0x0C /* R */ +/* IRQ_GPI_ACK1 0x54, IRQ_GPI_ACK2 0x55, IRQ_GPI_ACK3 0x56 */ +#define STMFX_REG_IRQ_GPI_ACK 0x54 /* RW */ + +/* STMFX_REG_IRQ_PENDING bitfields */ +#define STMFX_REG_IRQ_PENDING_GPIO BIT(0) + +#define NR_GPIO_REGS 3 +#define NR_GPIOS_PER_REG 8 +#define get_reg(offset) ((offset) / NR_GPIOS_PER_REG) +#define get_shift(offset) ((offset) % NR_GPIOS_PER_REG) +#define get_mask(offset) (BIT(get_shift(offset))) + +/* + * STMFX pinctrl can have up to 24 pins if STMFX other functions are not used. + * Pins availability is managed thanks to gpio-ranges property. + */ +static const struct pinctrl_pin_desc stmfx_pins[] = { + PINCTRL_PIN(0, "gpio0"), + PINCTRL_PIN(1, "gpio1"), + PINCTRL_PIN(2, "gpio2"), + PINCTRL_PIN(3, "gpio3"), + PINCTRL_PIN(4, "gpio4"), + PINCTRL_PIN(5, "gpio5"), + PINCTRL_PIN(6, "gpio6"), + PINCTRL_PIN(7, "gpio7"), + PINCTRL_PIN(8, "gpio8"), + PINCTRL_PIN(9, "gpio9"), + PINCTRL_PIN(10, "gpio10"), + PINCTRL_PIN(11, "gpio11"), + PINCTRL_PIN(12, "gpio12"), + PINCTRL_PIN(13, "gpio13"), + PINCTRL_PIN(14, "gpio14"), + PINCTRL_PIN(15, "gpio15"), + PINCTRL_PIN(16, "agpio0"), + PINCTRL_PIN(17, "agpio1"), + PINCTRL_PIN(18, "agpio2"), + PINCTRL_PIN(19, "agpio3"), + PINCTRL_PIN(20, "agpio4"), + PINCTRL_PIN(21, "agpio5"), + PINCTRL_PIN(22, "agpio6"), + PINCTRL_PIN(23, "agpio7"), +}; + +struct stmfx_pinctrl { + struct device *dev; + struct stmfx *stmfx; + struct pinctrl_dev *pctl_dev; + struct pinctrl_desc pctl_desc; + struct gpio_chip gpio_chip; + struct irq_chip irq_chip; + struct mutex lock; /* IRQ bus lock */ + unsigned long gpio_valid_mask; + /* Cache of IRQ_GPI_* registers for bus_lock */ + u8 irq_gpi_src[NR_GPIO_REGS]; + u8 irq_gpi_type[NR_GPIO_REGS]; + u8 irq_gpi_evt[NR_GPIO_REGS]; + u8 irq_toggle_edge[NR_GPIO_REGS]; +#ifdef CONFIG_PM + /* Backup of GPIO_* registers for suspend/resume */ + u8 bkp_gpio_state[NR_GPIO_REGS]; + u8 bkp_gpio_dir[NR_GPIO_REGS]; + u8 bkp_gpio_type[NR_GPIO_REGS]; + u8 bkp_gpio_pupd[NR_GPIO_REGS]; +#endif +}; + +static int stmfx_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct stmfx_pinctrl *pctl = gpiochip_get_data(gc); + u32 reg = STMFX_REG_GPIO_STATE + get_reg(offset); + u32 mask = get_mask(offset); + u32 value; + int ret; + + ret = regmap_read(pctl->stmfx->map, reg, &value); + + return ret ? ret : !!(value & mask); +} + +static void stmfx_gpio_set(struct gpio_chip *gc, unsigned int offset, int value) +{ + struct stmfx_pinctrl *pctl = gpiochip_get_data(gc); + u32 reg = value ? STMFX_REG_GPO_SET : STMFX_REG_GPO_CLR; + u32 mask = get_mask(offset); + + regmap_write_bits(pctl->stmfx->map, reg + get_reg(offset), + mask, mask); +} + +static int stmfx_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct stmfx_pinctrl *pctl = gpiochip_get_data(gc); + u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset); + u32 mask = get_mask(offset); + u32 val; + int ret; + + ret = regmap_read(pctl->stmfx->map, reg, &val); + /* + * On stmfx, gpio pins direction is (0)input, (1)output. + * .get_direction returns 0=out, 1=in + */ + + return ret ? ret : !(val & mask); +} + +static int stmfx_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) +{ + struct stmfx_pinctrl *pctl = gpiochip_get_data(gc); + u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset); + u32 mask = get_mask(offset); + + return regmap_write_bits(pctl->stmfx->map, reg, mask, 0); +} + +static int stmfx_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int value) +{ + struct stmfx_pinctrl *pctl = gpiochip_get_data(gc); + u32 reg = STMFX_REG_GPIO_DIR + get_reg(offset); + u32 mask = get_mask(offset); + + stmfx_gpio_set(gc, offset, value); + + return regmap_write_bits(pctl->stmfx->map, reg, mask, mask); +} + +static int stmfx_pinconf_get_pupd(struct stmfx_pinctrl *pctl, + unsigned int offset) +{ + u32 reg = STMFX_REG_GPIO_PUPD + get_reg(offset); + u32 pupd, mask = get_mask(offset); + int ret; + + ret = regmap_read(pctl->stmfx->map, reg, &pupd); + if (ret) + return ret; + + return !!(pupd & mask); +} + +static int stmfx_pinconf_set_pupd(struct stmfx_pinctrl *pctl, + unsigned int offset, u32 pupd) +{ + u32 reg = STMFX_REG_GPIO_PUPD + get_reg(offset); + u32 mask = get_mask(offset); + + return regmap_write_bits(pctl->stmfx->map, reg, mask, pupd ? mask : 0); +} + +static int stmfx_pinconf_get_type(struct stmfx_pinctrl *pctl, + unsigned int offset) +{ + u32 reg = STMFX_REG_GPIO_TYPE + get_reg(offset); + u32 type, mask = get_mask(offset); + int ret; + + ret = regmap_read(pctl->stmfx->map, reg, &type); + if (ret) + return ret; + + return !!(type & mask); +} + +static int stmfx_pinconf_set_type(struct stmfx_pinctrl *pctl, + unsigned int offset, u32 type) +{ + u32 reg = STMFX_REG_GPIO_TYPE + get_reg(offset); + u32 mask = get_mask(offset); + + return regmap_write_bits(pctl->stmfx->map, reg, mask, type ? mask : 0); +} + +static int stmfx_pinconf_get(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned long *config) +{ + struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + u32 param = pinconf_to_config_param(*config); + struct pinctrl_gpio_range *range; + u32 dir, type, pupd; + u32 arg = 0; + int ret; + + range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin); + if (!range) + return -EINVAL; + + dir = stmfx_gpio_get_direction(&pctl->gpio_chip, pin); + if (dir < 0) + return dir; + type = stmfx_pinconf_get_type(pctl, pin); + if (type < 0) + return type; + pupd = stmfx_pinconf_get_pupd(pctl, pin); + if (pupd < 0) + return pupd; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if ((!dir && (!type || !pupd)) || (dir && !type)) + arg = 1; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (dir && type && !pupd) + arg = 1; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (type && pupd) + arg = 1; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + if ((!dir && type) || (dir && !type)) + arg = 1; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + if ((!dir && !type) || (dir && type)) + arg = 1; + break; + case PIN_CONFIG_OUTPUT: + if (dir) + return -EINVAL; + + ret = stmfx_gpio_get(&pctl->gpio_chip, pin); + if (ret < 0) + return ret; + + arg = ret; + break; + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + + return 0; +} + +static int stmfx_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct pinctrl_gpio_range *range; + enum pin_config_param param; + u32 arg; + int dir, i, ret; + + range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin); + if (!range) { + dev_err(pctldev->dev, "pin %d is not available\n", pin); + return -EINVAL; + } + + dir = stmfx_gpio_get_direction(&pctl->gpio_chip, pin); + if (dir < 0) + return dir; + + for (i = 0; i < num_configs; i++) { + param = pinconf_to_config_param(configs[i]); + arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = stmfx_pinconf_set_pupd(pctl, pin, 0); + if (ret) + return ret; + break; + case PIN_CONFIG_BIAS_PULL_UP: + ret = stmfx_pinconf_set_pupd(pctl, pin, 1); + if (ret) + return ret; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + if (!dir) + ret = stmfx_pinconf_set_type(pctl, pin, 1); + else + ret = stmfx_pinconf_set_type(pctl, pin, 0); + if (ret) + return ret; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + if (!dir) + ret = stmfx_pinconf_set_type(pctl, pin, 0); + else + ret = stmfx_pinconf_set_type(pctl, pin, 1); + if (ret) + return ret; + break; + case PIN_CONFIG_OUTPUT: + ret = stmfx_gpio_direction_output(&pctl->gpio_chip, + pin, arg); + if (ret) + return ret; + break; + default: + return -ENOTSUPP; + } + } + + return 0; +} + +static void stmfx_pinconf_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, unsigned int offset) +{ + struct stmfx_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct pinctrl_gpio_range *range; + int dir, type, pupd, val; + + range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, offset); + if (!range) + return; + + dir = stmfx_gpio_get_direction(&pctl->gpio_chip, offset); + if (dir < 0) + return; + type = stmfx_pinconf_get_type(pctl, offset); + if (type < 0) + return; + pupd = stmfx_pinconf_get_pupd(pctl, offset); + if (pupd < 0) + return; + val = stmfx_gpio_get(&pctl->gpio_chip, offset); + if (val < 0) + return; + + if (!dir) { + seq_printf(s, "output %s ", val ? "high" : "low"); + if (type) + seq_printf(s, "open drain %s internal pull-up ", + pupd ? "with" : "without"); + else + seq_puts(s, "push pull no pull "); + } else { + seq_printf(s, "input %s ", val ? "high" : "low"); + if (type) + seq_printf(s, "with internal pull-%s ", + pupd ? "up" : "down"); + else + seq_printf(s, "%s ", pupd ? "floating" : "analog"); + } +} + +static const struct pinconf_ops stmfx_pinconf_ops = { + .pin_config_get = stmfx_pinconf_get, + .pin_config_set = stmfx_pinconf_set, + .pin_config_dbg_show = stmfx_pinconf_dbg_show, +}; + +static int stmfx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) +{ + return 0; +} + +static const char *stmfx_pinctrl_get_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + return NULL; +} + +static int stmfx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int selector, + const unsigned int **pins, + unsigned int *num_pins) +{ + return -ENOTSUPP; +} + +static const struct pinctrl_ops stmfx_pinctrl_ops = { + .get_groups_count = stmfx_pinctrl_get_groups_count, + .get_group_name = stmfx_pinctrl_get_group_name, + .get_group_pins = stmfx_pinctrl_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, + .dt_free_map = pinctrl_utils_free_map, +}; + +static void stmfx_pinctrl_irq_mask(struct irq_data *data) +{ + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data); + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); + u32 reg = get_reg(data->hwirq); + u32 mask = get_mask(data->hwirq); + + pctl->irq_gpi_src[reg] &= ~mask; +} + +static void stmfx_pinctrl_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data); + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); + u32 reg = get_reg(data->hwirq); + u32 mask = get_mask(data->hwirq); + + pctl->irq_gpi_src[reg] |= mask; +} + +static int stmfx_pinctrl_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data); + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); + u32 reg = get_reg(data->hwirq); + u32 mask = get_mask(data->hwirq); + + if (type & IRQ_TYPE_NONE) + return -EINVAL; + + if (type & IRQ_TYPE_EDGE_BOTH) { + pctl->irq_gpi_evt[reg] |= mask; + irq_set_handler_locked(data, handle_edge_irq); + } else { + pctl->irq_gpi_evt[reg] &= ~mask; + irq_set_handler_locked(data, handle_level_irq); + } + + if ((type & IRQ_TYPE_EDGE_RISING) || (type & IRQ_TYPE_LEVEL_HIGH)) + pctl->irq_gpi_type[reg] |= mask; + else + pctl->irq_gpi_type[reg] &= ~mask; + + /* + * In case of (type & IRQ_TYPE_EDGE_BOTH), we need to know current + * GPIO value to set the right edge trigger. But in atomic context + * here we can't access registers over I2C. That's why (type & + * IRQ_TYPE_EDGE_BOTH) will be managed in .irq_sync_unlock. + */ + + if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) + pctl->irq_toggle_edge[reg] |= mask; + else + pctl->irq_toggle_edge[reg] &= mask; + + return 0; +} + +static void stmfx_pinctrl_irq_bus_lock(struct irq_data *data) +{ + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data); + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); + + mutex_lock(&pctl->lock); +} + +static void stmfx_pinctrl_irq_bus_sync_unlock(struct irq_data *data) +{ + struct gpio_chip *gpio_chip = irq_data_get_irq_chip_data(data); + struct stmfx_pinctrl *pctl = gpiochip_get_data(gpio_chip); + u32 reg = get_reg(data->hwirq); + u32 mask = get_mask(data->hwirq); + + /* + * In case of IRQ_TYPE_EDGE_BOTH), read the current GPIO value + * (this couldn't be done in .irq_set_type because of atomic context) + * to set the right irq trigger type. + */ + if (pctl->irq_toggle_edge[reg] & mask) { + if (stmfx_gpio_get(gpio_chip, data->hwirq)) + pctl->irq_gpi_type[reg] &= ~mask; + else + pctl->irq_gpi_type[reg] |= mask; + } + + regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_EVT, + pctl->irq_gpi_evt, NR_GPIO_REGS); + regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_TYPE, + pctl->irq_gpi_type, NR_GPIO_REGS); + regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC, + pctl->irq_gpi_src, NR_GPIO_REGS); + + mutex_unlock(&pctl->lock); +} + +static void stmfx_pinctrl_irq_toggle_trigger(struct stmfx_pinctrl *pctl, + unsigned int offset) +{ + u32 reg = get_reg(offset); + u32 mask = get_mask(offset); + int val; + + if (!(pctl->irq_toggle_edge[reg] & mask)) + return; + + val = stmfx_gpio_get(&pctl->gpio_chip, offset); + if (val < 0) + return; + + if (val) { + pctl->irq_gpi_type[reg] &= mask; + regmap_write_bits(pctl->stmfx->map, + STMFX_REG_IRQ_GPI_TYPE + reg, + mask, 0); + + } else { + pctl->irq_gpi_type[reg] |= mask; + regmap_write_bits(pctl->stmfx->map, + STMFX_REG_IRQ_GPI_TYPE + reg, + mask, mask); + } +} + +static irqreturn_t stmfx_pinctrl_irq_thread_fn(int irq, void *dev_id) +{ + struct stmfx_pinctrl *pctl = (struct stmfx_pinctrl *)dev_id; + struct gpio_chip *gc = &pctl->gpio_chip; + u8 pending[NR_GPIO_REGS]; + unsigned long n, status; + int ret; + + ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_IRQ_GPI_PENDING, + &pending, NR_GPIO_REGS); + if (ret) + return IRQ_NONE; + + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_ACK, + pending, NR_GPIO_REGS); + if (ret) + return IRQ_NONE; + + status = *(unsigned long *)pending; + for_each_set_bit(n, &status, gc->ngpio) { + handle_nested_irq(irq_find_mapping(gc->irq.domain, n)); + stmfx_pinctrl_irq_toggle_trigger(pctl, n); + } + + return IRQ_HANDLED; +} + +static int stmfx_pinctrl_gpio_function_enable(struct stmfx_pinctrl *pctl) +{ + struct pinctrl_gpio_range *gpio_range; + struct pinctrl_dev *pctl_dev = pctl->pctl_dev; + u32 func = STMFX_FUNC_GPIO; + + pctl->gpio_valid_mask = GENMASK(15, 0); + + gpio_range = pinctrl_find_gpio_range_from_pin(pctl_dev, 16); + if (gpio_range) { + func |= STMFX_FUNC_ALTGPIO_LOW; + pctl->gpio_valid_mask |= GENMASK(19, 16); + } + + gpio_range = pinctrl_find_gpio_range_from_pin(pctl_dev, 20); + if (gpio_range) { + func |= STMFX_FUNC_ALTGPIO_HIGH; + pctl->gpio_valid_mask |= GENMASK(23, 20); + } + + return stmfx_function_enable(pctl->stmfx, func); +} + +static int stmfx_pinctrl_probe(struct platform_device *pdev) +{ + struct stmfx *stmfx = dev_get_platdata(&pdev->dev); + struct device_node *np = pdev->dev.of_node; + struct stmfx_pinctrl *pctl; + u32 n; + int irq, ret; + + pctl = devm_kzalloc(stmfx->dev, sizeof(*pctl), GFP_KERNEL); + if (!pctl) + return -ENOMEM; + + platform_set_drvdata(pdev, pctl); + + pctl->dev = &pdev->dev; + pctl->stmfx = stmfx; + + if (!of_find_property(np, "gpio-ranges", NULL)) { + dev_err(pctl->dev, "missing required gpio-ranges property\n"); + return -EINVAL; + } + + irq = platform_get_irq(pdev, 0); + if (irq <= 0) { + dev_err(pctl->dev, "failed to get irq\n"); + return -ENXIO; + } + + mutex_init(&pctl->lock); + + /* Register pin controller */ + pctl->pctl_desc.name = "stmfx-pinctrl"; + pctl->pctl_desc.pctlops = &stmfx_pinctrl_ops; + pctl->pctl_desc.confops = &stmfx_pinconf_ops; + pctl->pctl_desc.pins = stmfx_pins; + pctl->pctl_desc.npins = ARRAY_SIZE(stmfx_pins); + pctl->pctl_desc.owner = THIS_MODULE; + + ret = devm_pinctrl_register_and_init(pctl->dev, &pctl->pctl_desc, + pctl, &pctl->pctl_dev); + if (ret) { + dev_err(pctl->dev, "pinctrl registration failed\n"); + return ret; + } + + ret = pinctrl_enable(pctl->pctl_dev); + if (ret) { + dev_err(pctl->dev, "pinctrl enable failed\n"); + return ret; + } + + /* Register gpio controller */ + pctl->gpio_chip.label = "stmfx-gpio"; + pctl->gpio_chip.parent = pctl->dev; + pctl->gpio_chip.get_direction = stmfx_gpio_get_direction; + pctl->gpio_chip.direction_input = stmfx_gpio_direction_input; + pctl->gpio_chip.direction_output = stmfx_gpio_direction_output; + pctl->gpio_chip.get = stmfx_gpio_get; + pctl->gpio_chip.set = stmfx_gpio_set; + pctl->gpio_chip.set_config = gpiochip_generic_config; + pctl->gpio_chip.base = -1; + pctl->gpio_chip.ngpio = pctl->pctl_desc.npins; + pctl->gpio_chip.can_sleep = true; + pctl->gpio_chip.of_node = np; + pctl->gpio_chip.need_valid_mask = true; + + ret = devm_gpiochip_add_data(pctl->dev, &pctl->gpio_chip, pctl); + if (ret) { + dev_err(pctl->dev, "gpio_chip registration failed\n"); + return ret; + } + + ret = stmfx_pinctrl_gpio_function_enable(pctl); + if (ret) + return ret; + + pctl->irq_chip.name = dev_name(pctl->dev); + pctl->irq_chip.irq_mask = stmfx_pinctrl_irq_mask; + pctl->irq_chip.irq_unmask = stmfx_pinctrl_irq_unmask; + pctl->irq_chip.irq_set_type = stmfx_pinctrl_irq_set_type; + pctl->irq_chip.irq_bus_lock = stmfx_pinctrl_irq_bus_lock; + pctl->irq_chip.irq_bus_sync_unlock = stmfx_pinctrl_irq_bus_sync_unlock; + for_each_clear_bit(n, &pctl->gpio_valid_mask, pctl->gpio_chip.ngpio) + clear_bit(n, pctl->gpio_chip.valid_mask); + + ret = gpiochip_irqchip_add_nested(&pctl->gpio_chip, &pctl->irq_chip, + 0, handle_bad_irq, IRQ_TYPE_NONE); + if (ret) { + dev_err(pctl->dev, "cannot add irqchip to gpiochip\n"); + return ret; + } + + ret = devm_request_threaded_irq(pctl->dev, irq, NULL, + stmfx_pinctrl_irq_thread_fn, + IRQF_ONESHOT, + pctl->irq_chip.name, pctl); + if (ret) { + dev_err(pctl->dev, "cannot request irq%d\n", irq); + return ret; + } + + gpiochip_set_nested_irqchip(&pctl->gpio_chip, &pctl->irq_chip, irq); + + dev_info(pctl->dev, + "%ld GPIOs available\n", hweight_long(pctl->gpio_valid_mask)); + + return 0; +} + +static int stmfx_pinctrl_remove(struct platform_device *pdev) +{ + struct stmfx *stmfx = dev_get_platdata(&pdev->dev); + + return stmfx_function_disable(stmfx, + STMFX_FUNC_GPIO | + STMFX_FUNC_ALTGPIO_LOW | + STMFX_FUNC_ALTGPIO_HIGH); +} + +#ifdef CONFIG_PM_SLEEP +static int stmfx_pinctrl_backup_regs(struct stmfx_pinctrl *pctl) +{ + int ret; + + ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_STATE, + &pctl->bkp_gpio_state, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_DIR, + &pctl->bkp_gpio_dir, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_TYPE, + &pctl->bkp_gpio_type, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_read(pctl->stmfx->map, STMFX_REG_GPIO_PUPD, + &pctl->bkp_gpio_pupd, NR_GPIO_REGS); + if (ret) + return ret; + + return 0; +} + +static int stmfx_pinctrl_restore_regs(struct stmfx_pinctrl *pctl) +{ + int ret; + + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_DIR, + pctl->bkp_gpio_dir, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_TYPE, + pctl->bkp_gpio_type, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPIO_PUPD, + pctl->bkp_gpio_pupd, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_GPO_SET, + pctl->bkp_gpio_state, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_EVT, + pctl->irq_gpi_evt, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_TYPE, + pctl->irq_gpi_type, NR_GPIO_REGS); + if (ret) + return ret; + ret = regmap_bulk_write(pctl->stmfx->map, STMFX_REG_IRQ_GPI_SRC, + pctl->irq_gpi_src, NR_GPIO_REGS); + if (ret) + return ret; + + return 0; +} + +static int stmfx_pinctrl_suspend(struct device *dev) +{ + struct stmfx_pinctrl *pctl = dev_get_drvdata(dev); + int ret; + + ret = stmfx_pinctrl_backup_regs(pctl); + if (ret) { + dev_err(pctl->dev, "registers backup failure\n"); + return ret; + } + + return 0; +} + +static int stmfx_pinctrl_resume(struct device *dev) +{ + struct stmfx_pinctrl *pctl = dev_get_drvdata(dev); + int ret; + + ret = stmfx_pinctrl_restore_regs(pctl); + if (ret) { + dev_err(pctl->dev, "registers restoration failure\n"); + return ret; + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(stmfx_pinctrl_dev_pm_ops, + stmfx_pinctrl_suspend, stmfx_pinctrl_resume); + +static const struct of_device_id stmfx_pinctrl_of_match[] = { + { .compatible = "st,stmfx-0300-pinctrl", }, + {}, +}; +MODULE_DEVICE_TABLE(of, stmfx_pinctrl_of_match); + +static struct platform_driver stmfx_pinctrl_driver = { + .driver = { + .name = "stmfx-pinctrl", + .of_match_table = stmfx_pinctrl_of_match, + .pm = &stmfx_pinctrl_dev_pm_ops, + }, + .probe = stmfx_pinctrl_probe, + .remove = stmfx_pinctrl_remove, +}; +module_platform_driver(stmfx_pinctrl_driver); + +MODULE_DESCRIPTION("STMFX pinctrl/GPIO driver"); +MODULE_AUTHOR("Amelie Delaunay "); +MODULE_LICENSE("GPL v2"); From patchwork Thu Sep 27 11:40:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617849 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4324A913 for ; Thu, 27 Sep 2018 11:43:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 31196283CB for ; Thu, 27 Sep 2018 11:43:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 237222844B; Thu, 27 Sep 2018 11:43:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 81251283CB for ; 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Thu, 27 Sep 2018 13:40:18 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:17 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 5/7] ARM: dts: stm32: add STMFX support on stm32746g-eval Date: Thu, 27 Sep 2018 13:40:02 +0200 Message-ID: <1538048404-9041-6-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044051_011502_A70B2252 X-CRM114-Status: GOOD ( 12.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for STMicroelectronics Multi-Function eXpander (STMFX) on stm32746g-eval. It is connected on i2c1. Signed-off-by: Amelie Delaunay Acked-by: Linus Walleij --- arch/arm/boot/dts/stm32746g-eval.dts | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/boot/dts/stm32746g-eval.dts b/arch/arm/boot/dts/stm32746g-eval.dts index 8c081ea..203faf0 100644 --- a/arch/arm/boot/dts/stm32746g-eval.dts +++ b/arch/arm/boot/dts/stm32746g-eval.dts @@ -44,6 +44,7 @@ #include "stm32f746.dtsi" #include "stm32f746-pinctrl.dtsi" #include +#include / { model = "STMicroelectronics STM32746g-EVAL board"; @@ -114,6 +115,22 @@ i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; status = "okay"; + + stmfx: stmfx@42 { + compatible = "st,stmfx-0300"; + reg = <0x42>; + interrupts = <8 IRQ_TYPE_EDGE_RISING>; + interrupt-parent = <&gpioi>; + + stmfx_pinctrl: stmfx-pin-controller { + compatible = "st,stmfx-0300-pinctrl"; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + gpio-ranges = <&stmfx_pinctrl 0 0 24>; + }; + }; }; &rtc { From patchwork Thu Sep 27 11:40:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617845 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9B84A913 for ; Thu, 27 Sep 2018 11:41:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89E1C2B1AD for ; Thu, 27 Sep 2018 11:41:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7C9CD2B1B9; Thu, 27 Sep 2018 11:41:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D0BA42B1AD for ; 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Thu, 27 Sep 2018 13:40:19 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:19 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 6/7] ARM: dts: stm32: add joystick support on stm32746g-eval Date: Thu, 27 Sep 2018 13:40:03 +0200 Message-ID: <1538048404-9041-7-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044050_902532_6F6C827F X-CRM114-Status: GOOD ( 11.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The joystick (B3) on stm32746g-eval uses gpios on STMFX gpio expander. These gpios need a pin configuration (push-pull and bias-pull-up), described under stmfx_pinctrl node. Signed-off-by: Amelie Delaunay Acked-by: Linus Walleij --- arch/arm/boot/dts/stm32746g-eval.dts | 43 ++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/arch/arm/boot/dts/stm32746g-eval.dts b/arch/arm/boot/dts/stm32746g-eval.dts index 203faf0..b86ad83 100644 --- a/arch/arm/boot/dts/stm32746g-eval.dts +++ b/arch/arm/boot/dts/stm32746g-eval.dts @@ -86,6 +86,43 @@ }; }; + joystick { + compatible = "gpio-keys"; + #size-cells = <0>; + pinctrl-0 = <&joystick_pins>; + pinctrl-names = "default"; + button-0 { + label = "JoySel"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <0 IRQ_TYPE_EDGE_FALLING>; + }; + button-1 { + label = "JoyDown"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <1 IRQ_TYPE_EDGE_FALLING>; + }; + button-2 { + label = "JoyLeft"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <2 IRQ_TYPE_EDGE_FALLING>; + }; + button-3 { + label = "JoyRight"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <3 IRQ_TYPE_EDGE_FALLING>; + }; + button-4 { + label = "JoyUp"; + linux,code = ; + interrupt-parent = <&stmfx_pinctrl>; + interrupts = <4 IRQ_TYPE_EDGE_FALLING>; + }; + }; + usbotg_hs_phy: usb-phy { #phy-cells = <0>; compatible = "usb-nop-xceiv"; @@ -129,6 +166,12 @@ interrupt-controller; #interrupt-cells = <2>; gpio-ranges = <&stmfx_pinctrl 0 0 24>; + + joystick_pins: joystick { + pins = "gpio0", "gpio1", "gpio2", "gpio3", "gpio4"; + drive-push-pull; + bias-pull-up; + }; }; }; }; From patchwork Thu Sep 27 11:40:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 10617855 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EB54C913 for ; Thu, 27 Sep 2018 11:46:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA1542B238 for ; 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Thu, 27 Sep 2018 13:40:21 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id A1EB031; Thu, 27 Sep 2018 11:40:20 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 7C54C2986; Thu, 27 Sep 2018 11:40:20 +0000 (GMT) Received: from SAFEX1HUBCAS24.st.com (10.75.90.95) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:20 +0200 Received: from localhost (10.201.20.5) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 27 Sep 2018 13:40:20 +0200 From: Amelie Delaunay To: Lee Jones , Linus Walleij , Rob Herring , Mark Rutland , Alexandre Torgue , "Maxime Coquelin" Subject: [PATCH v3 7/7] ARM: dts: stm32: add orange and blue leds on stm32746g-eval Date: Thu, 27 Sep 2018 13:40:04 +0200 Message-ID: <1538048404-9041-8-git-send-email-amelie.delaunay@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> References: <1538048404-9041-1-git-send-email-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.5] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-09-27_06:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180927_044051_795877_29285621 X-CRM114-Status: GOOD ( 10.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Amelie Delaunay , linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Orange (LD2) and blue (LD4) leds on stm32746g-eval are connected on STMFX gpio expander, offset 17 and 19. Signed-off-by: Amelie Delaunay Acked-by: Linus Walleij --- arch/arm/boot/dts/stm32746g-eval.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/stm32746g-eval.dts b/arch/arm/boot/dts/stm32746g-eval.dts index b86ad83..a5fa73f 100644 --- a/arch/arm/boot/dts/stm32746g-eval.dts +++ b/arch/arm/boot/dts/stm32746g-eval.dts @@ -69,9 +69,15 @@ gpios = <&gpiof 10 1>; linux,default-trigger = "heartbeat"; }; + orange { + gpios = <&stmfx_pinctrl 17 1>; + }; red { gpios = <&gpiob 7 1>; }; + blue { + gpios = <&stmfx_pinctrl 19 1>; + }; }; gpio_keys {