From patchwork Tue Jun 28 08:18:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Schulz X-Patchwork-Id: 9202287 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 90C1A60757 for ; Tue, 28 Jun 2016 08:20:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 814C1285F1 for ; Tue, 28 Jun 2016 08:20:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 75C92285F7; Tue, 28 Jun 2016 08:20:41 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 05DC2285F1 for ; Tue, 28 Jun 2016 08:20:41 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bHoEh-0007og-Go; Tue, 28 Jun 2016 08:19:11 +0000 Received: from down.free-electrons.com ([37.187.137.238] helo=mail.free-electrons.com) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bHoEW-0007is-Qz for linux-arm-kernel@lists.infradead.org; Tue, 28 Jun 2016 08:19:02 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 067BB3DD; Tue, 28 Jun 2016 10:18:36 +0200 (CEST) Received: from quentin-Latitude-E6320.home (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 8669238B; Tue, 28 Jun 2016 10:18:36 +0200 (CEST) From: Quentin Schulz To: jdelvare@suse.com, linux@roeck-us.net, jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, maxime.ripard@free-electrons.com, wens@csie.org, lee.jones@linaro.org Subject: [PATCH 1/3] mfd: add support for Allwinner SoCs ADC Date: Tue, 28 Jun 2016 10:18:15 +0200 Message-Id: <1467101897-15946-2-git-send-email-quentin.schulz@free-electrons.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1467101897-15946-1-git-send-email-quentin.schulz@free-electrons.com> References: <1467101897-15946-1-git-send-email-quentin.schulz@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160628_011901_199038_CD971E72 X-CRM114-Status: GOOD ( 19.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hwmon@vger.kernel.org, thomas.petazzoni@free-electrons.com, linux-iio@vger.kernel.org, antoine.tenart@free-electrons.com, linux-kernel@vger.kernel.org, Quentin Schulz , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 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 Allwinner SoCs all have an ADC that can also act as a touchscreen controller and a thermal sensor. For now, only the ADC and the thermal sensor drivers are probed by the MFD, the touchscreen controller support will be added later. Signed-off-by: Quentin Schulz --- drivers/mfd/Kconfig | 14 +++ drivers/mfd/Makefile | 2 + drivers/mfd/sunxi-gpadc-mfd.c | 188 ++++++++++++++++++++++++++++++++++++ include/linux/mfd/sunxi-gpadc-mfd.h | 14 +++ 4 files changed, 218 insertions(+) create mode 100644 drivers/mfd/sunxi-gpadc-mfd.c create mode 100644 include/linux/mfd/sunxi-gpadc-mfd.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index eea61e3..1663db9 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -82,6 +82,20 @@ config MFD_ATMEL_FLEXCOM by the probe function of this MFD driver according to a device tree property. +config MFD_SUNXI_ADC + tristate "ADC MFD core driver for sunxi platforms" + select MFD_CORE + select REGMAP_MMIO + help + Select this to get support for Allwinner SoCs (A10, A13 and A31) ADC. + This driver will only map the hardware interrupt and registers, you + have to select individual drivers based on this MFD to be able to use + the ADC or the thermal sensor. This will try to probe the ADC driver + sunxi-gpadc-iio and the hwmon driver iio_hwmon. + + To compile this driver as a module, choose M here: the + module will be called sunxi-gpadc-mfd. + config MFD_ATMEL_HLCDC tristate "Atmel HLCDC (High-end LCD Controller)" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5eaa6465d..b280d0a 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -199,6 +199,8 @@ obj-$(CONFIG_MFD_DLN2) += dln2.o obj-$(CONFIG_MFD_RT5033) += rt5033.o obj-$(CONFIG_MFD_SKY81452) += sky81452.o +obj-$(CONFIG_MFD_SUNXI_ADC) += sunxi-gpadc-mfd.o + intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o intel-soc-pmic-$(CONFIG_INTEL_PMC_IPC) += intel_soc_pmic_bxtwc.o obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o diff --git a/drivers/mfd/sunxi-gpadc-mfd.c b/drivers/mfd/sunxi-gpadc-mfd.c new file mode 100644 index 0000000..710e297 --- /dev/null +++ b/drivers/mfd/sunxi-gpadc-mfd.c @@ -0,0 +1,188 @@ +#include +#include +#include +#include +#include +#include +#include +#include + +#define SUNXI_IRQ_FIFO_DATA 0 +#define SUNXI_IRQ_TEMP_DATA 1 + +static struct resource adc_resources[] = { + { + .name = "FIFO_DATA_PENDING", + .start = SUNXI_IRQ_FIFO_DATA, + .end = SUNXI_IRQ_FIFO_DATA, + .flags = IORESOURCE_IRQ, + }, { + .name = "TEMP_DATA_PENDING", + .start = SUNXI_IRQ_TEMP_DATA, + .end = SUNXI_IRQ_TEMP_DATA, + .flags = IORESOURCE_IRQ, + }, +}; + +static const struct regmap_irq sunxi_gpadc_mfd_regmap_irq[] = { + REGMAP_IRQ_REG(SUNXI_IRQ_FIFO_DATA, 0, BIT(16)), + REGMAP_IRQ_REG(SUNXI_IRQ_TEMP_DATA, 0, BIT(18)), +}; + +static const struct regmap_irq_chip sunxi_gpadc_mfd_regmap_irq_chip = { + .name = "sunxi_gpadc_mfd_irq_chip", + .status_base = TP_INT_FIFOS, + .ack_base = TP_INT_FIFOS, + .mask_base = TP_INT_FIFOC, + .init_ack_masked = true, + .mask_invert = true, + .irqs = sunxi_gpadc_mfd_regmap_irq, + .num_irqs = ARRAY_SIZE(sunxi_gpadc_mfd_regmap_irq), + .num_regs = 1, +}; + +static struct mfd_cell sun4i_gpadc_mfd_cells[] = { + { + .name = "sun4i-a10-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + } +}; + +static struct mfd_cell sun5i_gpadc_mfd_cells[] = { + { + .name = "sun5i-a13-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + }, +}; + +static struct mfd_cell sun6i_gpadc_mfd_cells[] = { + { + .name = "sun6i-a31-gpadc-iio", + .resources = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), + }, { + .name = "iio_hwmon", + }, +}; + +static const struct regmap_config sunxi_gpadc_mfd_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .fast_io = true, +}; + +static int sunxi_gpadc_mfd_probe(struct platform_device *pdev) +{ + struct sunxi_gpadc_mfd_dev *sunxi_gpadc_mfd_dev = NULL; + struct resource *mem = NULL; + unsigned int irq; + int ret; + + sunxi_gpadc_mfd_dev = devm_kzalloc(&pdev->dev, + sizeof(*sunxi_gpadc_mfd_dev), + GFP_KERNEL); + if (!sunxi_gpadc_mfd_dev) + return -ENOMEM; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sunxi_gpadc_mfd_dev->regs = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(sunxi_gpadc_mfd_dev->regs)) + return PTR_ERR(sunxi_gpadc_mfd_dev->regs); + + sunxi_gpadc_mfd_dev->dev = &pdev->dev; + dev_set_drvdata(sunxi_gpadc_mfd_dev->dev, sunxi_gpadc_mfd_dev); + + sunxi_gpadc_mfd_dev->regmap = + devm_regmap_init_mmio(sunxi_gpadc_mfd_dev->dev, + sunxi_gpadc_mfd_dev->regs, + &sunxi_gpadc_mfd_regmap_config); + if (IS_ERR(sunxi_gpadc_mfd_dev->regmap)) { + ret = PTR_ERR(sunxi_gpadc_mfd_dev->regmap); + dev_err(&pdev->dev, "failed to init regmap: %d\n", ret); + return ret; + } + + irq = platform_get_irq(pdev, 0); + ret = regmap_add_irq_chip(sunxi_gpadc_mfd_dev->regmap, irq, + IRQF_ONESHOT, 0, + &sunxi_gpadc_mfd_regmap_irq_chip, + &sunxi_gpadc_mfd_dev->regmap_irqc); + if (ret) { + dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret); + return ret; + } + + if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun4i-a10-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun4i_gpadc_mfd_cells, + ARRAY_SIZE(sun4i_gpadc_mfd_cells), NULL, + 0, NULL); + else if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun5i-a13-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun5i_gpadc_mfd_cells, + ARRAY_SIZE(sun5i_gpadc_mfd_cells), NULL, + 0, NULL); + else if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun6i-a31-ts")) + ret = mfd_add_devices(sunxi_gpadc_mfd_dev->dev, 0, + sun6i_gpadc_mfd_cells, + ARRAY_SIZE(sun6i_gpadc_mfd_cells), NULL, + 0, NULL); + + if (ret) { + dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret); + regmap_del_irq_chip(irq, sunxi_gpadc_mfd_dev->regmap_irqc); + mfd_remove_devices(&pdev->dev); + return ret; + } + + dev_info(&pdev->dev, "successfully loaded\n"); + + return 0; +} + +static int sunxi_gpadc_mfd_remove(struct platform_device *pdev) +{ + struct sunxi_gpadc_mfd_dev *sunxi_gpadc_mfd_dev; + unsigned int irq; + + irq = platform_get_irq(pdev, 0); + mfd_remove_devices(&pdev->dev); + sunxi_gpadc_mfd_dev = dev_get_drvdata(&pdev->dev); + regmap_del_irq_chip(irq, sunxi_gpadc_mfd_dev->regmap_irqc); + + return 0; +} + +static const struct of_device_id sunxi_gpadc_mfd_of_match[] = { + { .compatible = "allwinner,sun4i-a10-ts" }, + { .compatible = "allwinner,sun5i-a13-ts" }, + { .compatible = "allwinner,sun6i-a31-ts" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, sunxi_gpadc_mfd_of_match); + +static struct platform_driver sunxi_gpadc_mfd_driver = { + .driver = { + .name = "sunxi-adc-mfd", + .of_match_table = of_match_ptr(sunxi_gpadc_mfd_of_match), + }, + .probe = sunxi_gpadc_mfd_probe, + .remove = sunxi_gpadc_mfd_remove, +}; + +module_platform_driver(sunxi_gpadc_mfd_driver); + +MODULE_DESCRIPTION("ADC MFD core driver for sunxi platforms"); +MODULE_AUTHOR("Quentin Schulz "); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/sunxi-gpadc-mfd.h b/include/linux/mfd/sunxi-gpadc-mfd.h new file mode 100644 index 0000000..341f8c3 --- /dev/null +++ b/include/linux/mfd/sunxi-gpadc-mfd.h @@ -0,0 +1,14 @@ +#ifndef __SUNXI_GPADC_MFD__H__ +#define __SUNXI_GPADC_MFD__H__ + +#define TP_INT_FIFOC 0x10 +#define TP_INT_FIFOS 0x14 + +struct sunxi_gpadc_mfd_dev { + void __iomem *regs; + struct device *dev; + struct regmap *regmap; + struct regmap_irq_chip_data *regmap_irqc; +}; + +#endif