From patchwork Wed Mar 24 06:45:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianqun Xu X-Patchwork-Id: 12160323 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18F49C433E0 for ; Wed, 24 Mar 2021 06:46:24 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 74ADC619D5 for ; Wed, 24 Mar 2021 06:46:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74ADC619D5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=uXsOWbZFHVFK4+WUJseVTTshRHV5NN8BJmf20FnNR0o=; b=lKAf5FrehYI6RcPw4cK6E5MC5 3XpISVCh4HiuVdk8VcLkBxrbqMV/HZH0obrp5Y0iEKWc7CLdx+CYVfXwTnxV6Eh3Pmi1vuyf6bRdT CBFHiHezrSFXGZdq3zKuhJITYYni0RiZ7MwXNTBUCkegyvwh4ZnMxVGnfOrv/vEcJRrrWyk790avQ opGmM8PPBVDgihKtLkm2P2S1+E3UC3Z3T8tRV9k5DV/LX42uWrEXnE5pvJ8F6sjfszULGodY2dGDT 6FTWz5glStUWKb8MdP+nqIqBCAGc0McpPrqxq/F9f6ZQyMo4PWRAOjuwy145gD+atmXxuty9UpO7h 6RprZOw/A==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOxHV-00GQuK-8b; Wed, 24 Mar 2021 06:46:18 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lOxHM-00GQpY-UZ for linux-rockchip@lists.infradead.org; Wed, 24 Mar 2021 06:46:13 +0000 Received: from localhost (unknown [192.168.167.235]) by lucky1.263xmail.com (Postfix) with ESMTP id 633B1D0E31; Wed, 24 Mar 2021 14:46:01 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P24306T139685112297216S1616568346904525_; Wed, 24 Mar 2021 14:46:01 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <7a730bae88fd452394918af12ab06db5> X-RL-SENDER: jay.xu@rock-chips.com X-SENDER: xjq@rock-chips.com X-LOGIN-NAME: jay.xu@rock-chips.com X-FST-TO: huangtao@rock-chips.com X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jianqun Xu To: huangtao@rock-chips.com, kever.yang@rock-chips.com, linus.walleij@linaro.org, heiko@sntech.de Cc: linux-gpio@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Jianqun Xu Subject: [PATCH 3/7] gpio: separate gpio driver from pinctrl-rockchip driver Date: Wed, 24 Mar 2021 14:45:37 +0800 Message-Id: <20210324064541.949630-4-jay.xu@rock-chips.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210324064541.949630-1-jay.xu@rock-chips.com> References: <20210324064541.949630-1-jay.xu@rock-chips.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210324_064610_173601_E864839C X-CRM114-Status: GOOD ( 24.45 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Separate the gpio driver from the pinctrl driver. Signed-off-by: Jianqun Xu --- drivers/gpio/Kconfig | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-rockchip.c | 657 +++++++++++++++++++++++++++ drivers/pinctrl/pinctrl-rockchip.c | 685 +---------------------------- 4 files changed, 684 insertions(+), 667 deletions(-) create mode 100644 drivers/gpio/gpio-rockchip.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index e3607ec4c2e8..702fb6db3e46 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -508,6 +508,14 @@ config GPIO_REG A 32-bit single register GPIO fixed in/out implementation. This can be used to represent any register as a set of GPIO signals. +config GPIO_ROCKCHIP + tristate "Rockchip GPIO support" + depends on ARCH_ROCKCHIP || COMPILE_TEST + select GPIOLIB_IRQCHIP + default ARCH_ROCKCHIP + help + Say yes here to support GPIO on Rockchip SoCs. + config GPIO_SAMA5D2_PIOBU tristate "SAMA5D2 PIOBU GPIO support" depends on MFD_SYSCON diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index c58a90a3c3b1..1432694f3b3a 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -125,6 +125,7 @@ obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o obj-$(CONFIG_GPIO_RDA) += gpio-rda.o obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o obj-$(CONFIG_GPIO_REG) += gpio-reg.o +obj-$(CONFIG_GPIO_ROCKCHIP) += gpio-rockchip.o obj-$(CONFIG_ARCH_SA1100) += gpio-sa1100.o obj-$(CONFIG_GPIO_SAMA5D2_PIOBU) += gpio-sama5d2-piobu.o obj-$(CONFIG_GPIO_SCH311X) += gpio-sch311x.o diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c new file mode 100644 index 000000000000..03a3d251faae --- /dev/null +++ b/drivers/gpio/gpio-rockchip.c @@ -0,0 +1,657 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2013 MundoReader S.L. + * Author: Heiko Stuebner + * + * Copyright (c) 2021 Rockchip Electronics Co. Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../pinctrl/core.h" +#include "../pinctrl/pinctrl-rockchip.h" + +/* GPIO control registers */ +#define GPIO_SWPORT_DR 0x00 +#define GPIO_SWPORT_DDR 0x04 +#define GPIO_INTEN 0x30 +#define GPIO_INTMASK 0x34 +#define GPIO_INTTYPE_LEVEL 0x38 +#define GPIO_INT_POLARITY 0x3c +#define GPIO_INT_STATUS 0x40 +#define GPIO_INT_RAWSTATUS 0x44 +#define GPIO_DEBOUNCE 0x48 +#define GPIO_PORTS_EOI 0x4c +#define GPIO_EXT_PORT 0x50 +#define GPIO_LS_SYNC 0x60 + +static int rockchip_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(chip); + u32 data; + int ret; + + ret = clk_enable(bank->clk); + if (ret < 0) { + dev_err(bank->drvdata->dev, + "failed to enable clock for bank %s\n", bank->name); + return ret; + } + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); + clk_disable(bank->clk); + + if (data & BIT(offset)) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +static int rockchip_gpio_set_direction(struct gpio_chip *chip, + unsigned int offset, bool input) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(chip); + unsigned long flags; + u32 data; + + clk_enable(bank->clk); + raw_spin_lock_irqsave(&bank->slock, flags); + + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); + /* set bit to 1 for output, 0 for input */ + if (!input) + data |= BIT(offset); + else + data &= ~BIT(offset); + writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR); + + raw_spin_unlock_irqrestore(&bank->slock, flags); + clk_disable(bank->clk); + + return 0; +} + +static void rockchip_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(gc); + void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR; + unsigned long flags; + u32 data; + + clk_enable(bank->clk); + raw_spin_lock_irqsave(&bank->slock, flags); + + data = readl(reg); + data &= ~BIT(offset); + if (value) + data |= BIT(offset); + writel(data, reg); + + raw_spin_unlock_irqrestore(&bank->slock, flags); + clk_disable(bank->clk); +} + +static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(gc); + u32 data; + + clk_enable(bank->clk); + data = readl(bank->reg_base + GPIO_EXT_PORT); + clk_disable(bank->clk); + data >>= offset; + data &= 1; + return data; +} + +static void rockchip_gpio_set_debounce(struct gpio_chip *gc, + unsigned int offset, bool enable) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(gc); + void __iomem *reg = bank->reg_base + GPIO_DEBOUNCE; + unsigned long flags; + u32 data; + + clk_enable(bank->clk); + raw_spin_lock_irqsave(&bank->slock, flags); + + data = readl(reg); + if (enable) + data |= BIT(offset); + else + data &= ~BIT(offset); + writel(data, reg); + + raw_spin_unlock_irqrestore(&bank->slock, flags); + clk_disable(bank->clk); +} + +static int rockchip_gpio_direction_input(struct gpio_chip *gc, + unsigned int offset) +{ + return rockchip_gpio_set_direction(gc, offset, true); +} + +static int rockchip_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int value) +{ + rockchip_gpio_set(gc, offset, value); + + return rockchip_gpio_set_direction(gc, offset, false); +} + +/* + * gpiolib set_config callback function. The setting of the pin + * mux function as 'gpio output' will be handled by the pinctrl subsystem + * interface. + */ +static int rockchip_gpio_set_config(struct gpio_chip *gc, unsigned int offset, + unsigned long config) +{ + enum pin_config_param param = pinconf_to_config_param(config); + + switch (param) { + case PIN_CONFIG_INPUT_DEBOUNCE: + rockchip_gpio_set_debounce(gc, offset, true); + /* + * Rockchip's gpio could only support up to one period + * of the debounce clock(pclk), which is far away from + * satisftying the requirement, as pclk is usually near + * 100MHz shared by all peripherals. So the fact is it + * has crippled debounce capability could only be useful + * to prevent any spurious glitches from waking up the system + * if the gpio is conguired as wakeup interrupt source. Let's + * still return -ENOTSUPP as before, to make sure the caller + * of gpiod_set_debounce won't change its behaviour. + */ + return -ENOTSUPP; + default: + return -ENOTSUPP; + } +} + +/* + * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin + * and a virtual IRQ, if not already present. + */ +static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned int offset) +{ + struct rockchip_pin_bank *bank = gpiochip_get_data(gc); + unsigned int virq; + + if (!bank->domain) + return -ENXIO; + + clk_enable(bank->clk); + virq = irq_create_mapping(bank->domain, offset); + clk_disable(bank->clk); + + return (virq) ? : -ENXIO; +} + +static const struct gpio_chip rockchip_gpiolib_chip = { + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .set = rockchip_gpio_set, + .get = rockchip_gpio_get, + .get_direction = rockchip_gpio_get_direction, + .direction_input = rockchip_gpio_direction_input, + .direction_output = rockchip_gpio_direction_output, + .set_config = rockchip_gpio_set_config, + .to_irq = rockchip_gpio_to_irq, + .owner = THIS_MODULE, +}; + +static void rockchip_irq_demux(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + struct rockchip_pin_bank *bank = irq_desc_get_handler_data(desc); + u32 pend; + + dev_dbg(bank->dev, "got irq for bank %s\n", bank->name); + + chained_irq_enter(chip, desc); + + pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS); + + while (pend) { + unsigned int irq, virq; + + irq = __ffs(pend); + pend &= ~BIT(irq); + virq = irq_find_mapping(bank->domain, irq); + + if (!virq) { + dev_err(bank->dev, "unmapped irq %d\n", irq); + continue; + } + + dev_dbg(bank->dev, "handling irq %d\n", irq); + + /* + * Triggering IRQ on both rising and falling edge + * needs manual intervention. + */ + if (bank->toggle_edge_mode & BIT(irq)) { + u32 data, data_old, polarity; + unsigned long flags; + + data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT); + do { + raw_spin_lock_irqsave(&bank->slock, flags); + + polarity = readl_relaxed(bank->reg_base + + GPIO_INT_POLARITY); + if (data & BIT(irq)) + polarity &= ~BIT(irq); + else + polarity |= BIT(irq); + writel(polarity, + bank->reg_base + GPIO_INT_POLARITY); + + raw_spin_unlock_irqrestore(&bank->slock, flags); + + data_old = data; + data = readl_relaxed(bank->reg_base + + GPIO_EXT_PORT); + } while ((data & BIT(irq)) != (data_old & BIT(irq))); + } + + generic_handle_irq(virq); + } + + chained_irq_exit(chip, desc); +} + +static int rockchip_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct rockchip_pin_bank *bank = gc->private; + u32 mask = BIT(d->hwirq); + u32 polarity; + u32 level; + u32 data; + unsigned long flags; + + clk_enable(bank->clk); + raw_spin_lock_irqsave(&bank->slock, flags); + + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); + data &= ~mask; + writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR); + + raw_spin_unlock_irqrestore(&bank->slock, flags); + + if (type & IRQ_TYPE_EDGE_BOTH) + irq_set_handler_locked(d, handle_edge_irq); + else + irq_set_handler_locked(d, handle_level_irq); + + raw_spin_lock_irqsave(&bank->slock, flags); + irq_gc_lock(gc); + + level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL); + polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY); + + switch (type) { + case IRQ_TYPE_EDGE_BOTH: + bank->toggle_edge_mode |= mask; + level |= mask; + + /* + * Determine gpio state. If 1 next interrupt should be falling + * otherwise rising. + */ + data = readl(bank->reg_base + GPIO_EXT_PORT); + if (data & mask) + polarity &= ~mask; + else + polarity |= mask; + break; + case IRQ_TYPE_EDGE_RISING: + bank->toggle_edge_mode &= ~mask; + level |= mask; + polarity |= mask; + break; + case IRQ_TYPE_EDGE_FALLING: + bank->toggle_edge_mode &= ~mask; + level |= mask; + polarity &= ~mask; + break; + case IRQ_TYPE_LEVEL_HIGH: + bank->toggle_edge_mode &= ~mask; + level &= ~mask; + polarity |= mask; + break; + case IRQ_TYPE_LEVEL_LOW: + bank->toggle_edge_mode &= ~mask; + level &= ~mask; + polarity &= ~mask; + break; + default: + irq_gc_unlock(gc); + raw_spin_unlock_irqrestore(&bank->slock, flags); + clk_disable(bank->clk); + return -EINVAL; + } + + writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL); + writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY); + + irq_gc_unlock(gc); + raw_spin_unlock_irqrestore(&bank->slock, flags); + clk_disable(bank->clk); + + return 0; +} + +static void rockchip_irq_suspend(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct rockchip_pin_bank *bank = gc->private; + + clk_enable(bank->clk); + bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK); + irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK); + clk_disable(bank->clk); +} + +static void rockchip_irq_resume(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct rockchip_pin_bank *bank = gc->private; + + clk_enable(bank->clk); + irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK); + clk_disable(bank->clk); +} + +static void rockchip_irq_enable(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct rockchip_pin_bank *bank = gc->private; + + clk_enable(bank->clk); + irq_gc_mask_clr_bit(d); +} + +static void rockchip_irq_disable(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct rockchip_pin_bank *bank = gc->private; + + irq_gc_mask_set_bit(d); + clk_disable(bank->clk); +} + +static int rockchip_interrupts_register(struct rockchip_pin_bank *bank) +{ + unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + struct irq_chip_generic *gc; + int ret; + + ret = clk_enable(bank->clk); + if (ret) { + dev_err(bank->dev, "failed to enable clock for bank %s\n", + bank->name); + return -EINVAL; + } + + bank->domain = irq_domain_add_linear(bank->of_node, 32, + &irq_generic_chip_ops, NULL); + if (!bank->domain) { + dev_warn(bank->dev, "could not init irq domain for bank %s\n", + bank->name); + clk_disable(bank->clk); + return -EINVAL; + } + + ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1, + "rockchip_gpio_irq", + handle_level_irq, + clr, 0, 0); + if (ret) { + dev_err(bank->dev, "could not alloc generic chips for bank %s\n", + bank->name); + irq_domain_remove(bank->domain); + clk_disable(bank->clk); + return -EINVAL; + } + + gc = irq_get_domain_generic_chip(bank->domain, 0); + gc->reg_base = bank->reg_base; + gc->private = bank; + gc->chip_types[0].regs.mask = GPIO_INTMASK; + gc->chip_types[0].regs.ack = GPIO_PORTS_EOI; + gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit; + gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit; + gc->chip_types[0].chip.irq_enable = rockchip_irq_enable; + gc->chip_types[0].chip.irq_disable = rockchip_irq_disable; + gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake; + gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend; + gc->chip_types[0].chip.irq_resume = rockchip_irq_resume; + gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type; + gc->wake_enabled = IRQ_MSK(bank->nr_pins); + + /* + * Linux assumes that all interrupts start out disabled/masked. + * Our driver only uses the concept of masked and always keeps + * things enabled, so for us that's all masked and all enabled. + */ + writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK); + writel_relaxed(0xffffffff, bank->reg_base + GPIO_PORTS_EOI); + writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN); + gc->mask_cache = 0xffffffff; + + irq_set_chained_handler_and_data(bank->irq, + rockchip_irq_demux, bank); + clk_disable(bank->clk); + + return 0; +} + +static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank) +{ + struct gpio_chip *gc; + int ret; + + bank->gpio_chip = rockchip_gpiolib_chip; + + gc = &bank->gpio_chip; + gc->base = bank->pin_base; + gc->ngpio = bank->nr_pins; + gc->label = bank->name; + gc->parent = bank->dev; +#ifdef CONFIG_OF_GPIO + gc->of_node = of_node_get(bank->of_node); +#endif + + ret = gpiochip_add_data(gc, bank); + if (ret) { + dev_err(bank->dev, "failed to add gpiochip %s, %d\n", + gc->label, ret); + return ret; + } + + /* + * For DeviceTree-supported systems, the gpio core checks the + * pinctrl's device node for the "gpio-ranges" property. + * If it is present, it takes care of adding the pin ranges + * for the driver. In this case the driver can skip ahead. + * + * In order to remain compatible with older, existing DeviceTree + * files which don't set the "gpio-ranges" property or systems that + * utilize ACPI the driver has to call gpiochip_add_pin_range(). + */ + if (!of_property_read_bool(bank->of_node, "gpio-ranges")) { + struct device_node *pctlnp = of_get_parent(bank->of_node); + struct pinctrl_dev *pctldev = NULL; + + if (!pctlnp) + return -ENODATA; + + pctldev = of_pinctrl_get(pctlnp); + if (!pctldev) + return -ENODEV; + + ret = gpiochip_add_pin_range(gc, dev_name(pctldev->dev), 0, + gc->base, gc->ngpio); + if (ret) { + dev_err(bank->dev, "Failed to add pin range\n"); + goto fail; + } + } + + ret = rockchip_interrupts_register(bank); + if (ret) { + dev_err(bank->dev, "failed to register interrupt, %d\n", ret); + goto fail; + } + + return 0; + +fail: + gpiochip_remove(&bank->gpio_chip); + + return ret; +} + +static int rockchip_get_bank_data(struct rockchip_pin_bank *bank) +{ + struct resource res; + + if (of_address_to_resource(bank->of_node, 0, &res)) { + dev_err(bank->dev, "cannot find IO resource for bank\n"); + return -ENOENT; + } + + bank->reg_base = devm_ioremap_resource(bank->dev, &res); + if (IS_ERR(bank->reg_base)) + return PTR_ERR(bank->reg_base); + + bank->irq = irq_of_parse_and_map(bank->of_node, 0); + + bank->clk = of_clk_get(bank->of_node, 0); + if (!IS_ERR(bank->clk)) + return clk_prepare(bank->clk); + + bank->clk = NULL; + return 0; +} + +static struct rockchip_pin_bank * +rockchip_gpio_find_bank(struct pinctrl_dev *pctldev, const char *name) +{ + struct rockchip_pinctrl *info; + struct rockchip_pin_bank *bank; + int i, found = 0; + + info = pinctrl_dev_get_drvdata(pctldev); + bank = info->ctrl->pin_banks; + for (i = 0; i < info->ctrl->nr_banks; i++, bank++) { + if (!strcmp(bank->name, name)) { + found = 1; + break; + } + } + + return found ? bank : NULL; +} + +static int rockchip_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *pctlnp = of_get_parent(np); + struct pinctrl_dev *pctldev = NULL; + struct rockchip_pin_bank *bank = NULL; + int ret; + + if (!np || !pctlnp) + return -ENODEV; + + pctldev = of_pinctrl_get(pctlnp); + if (!pctldev) + return -EPROBE_DEFER; + + bank = rockchip_gpio_find_bank(pctldev, np->name); + if (!bank) + return -EINVAL; + + bank->dev = dev; + bank->of_node = np; + + raw_spin_lock_init(&bank->slock); + + ret = rockchip_get_bank_data(bank); + if (ret) + return ret; + + ret = rockchip_gpiolib_register(bank); + if (ret) { + clk_disable_unprepare(bank->clk); + return ret; + } + + platform_set_drvdata(pdev, bank); + dev_info(dev, "probed %pOF\n", np); + + return 0; +} + +static int rockchip_gpio_remove(struct platform_device *pdev) +{ + struct rockchip_pin_bank *bank = platform_get_drvdata(pdev); + + clk_disable_unprepare(bank->clk); + gpiochip_remove(&bank->gpio_chip); + + return 0; +} + +static const struct of_device_id rockchip_gpio_match[] = { + { .compatible = "rockchip,gpio-bank", }, + { .compatible = "rockchip,rk3188-gpio-bank0" }, + { }, +}; + +static struct platform_driver rockchip_gpio_driver = { + .probe = rockchip_gpio_probe, + .remove = rockchip_gpio_remove, + .driver = { + .name = "rockchip-gpio", + .of_match_table = rockchip_gpio_match, + }, +}; + +static int __init rockchip_gpio_init(void) +{ + return platform_driver_register(&rockchip_gpio_driver); +} +postcore_initcall(rockchip_gpio_init); + +static void __exit rockchip_gpio_exit(void) +{ + platform_driver_unregister(&rockchip_gpio_driver); +} +module_exit(rockchip_gpio_exit); + +MODULE_DESCRIPTION("Rockchip gpio driver"); +MODULE_ALIAS("platform:rockchip-gpio"); +MODULE_LICENSE("GPL v2"); +MODULE_DEVICE_TABLE(of, rockchip_gpio_match); diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index 625ebc1cdfd5..543171edd929 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -20,9 +20,9 @@ #include #include #include -#include -#include +#include #include +#include #include #include #include @@ -39,20 +39,6 @@ #include "pinconf.h" #include "pinctrl-rockchip.h" -/* GPIO control registers */ -#define GPIO_SWPORT_DR 0x00 -#define GPIO_SWPORT_DDR 0x04 -#define GPIO_INTEN 0x30 -#define GPIO_INTMASK 0x34 -#define GPIO_INTTYPE_LEVEL 0x38 -#define GPIO_INT_POLARITY 0x3c -#define GPIO_INT_STATUS 0x40 -#define GPIO_INT_RAWSTATUS 0x44 -#define GPIO_DEBOUNCE 0x48 -#define GPIO_PORTS_EOI 0x4c -#define GPIO_EXT_PORT 0x50 -#define GPIO_LS_SYNC 0x60 - /* * Encode variants of iomux registers into a type variable */ @@ -2317,86 +2303,11 @@ static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector, return 0; } -static int rockchip_gpio_get_direction(struct gpio_chip *chip, unsigned offset) -{ - struct rockchip_pin_bank *bank = gpiochip_get_data(chip); - u32 data; - int ret; - - ret = clk_enable(bank->clk); - if (ret < 0) { - dev_err(bank->drvdata->dev, - "failed to enable clock for bank %s\n", bank->name); - return ret; - } - data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); - clk_disable(bank->clk); - - if (data & BIT(offset)) - return GPIO_LINE_DIRECTION_OUT; - - return GPIO_LINE_DIRECTION_IN; -} - -/* - * The calls to gpio_direction_output() and gpio_direction_input() - * leads to this function call (via the pinctrl_gpio_direction_{input|output}() - * function called from the gpiolib interface). - */ -static int _rockchip_pmx_gpio_set_direction(struct gpio_chip *chip, - int pin, bool input) -{ - struct rockchip_pin_bank *bank; - int ret; - unsigned long flags; - u32 data; - - bank = gpiochip_get_data(chip); - - ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO); - if (ret < 0) - return ret; - - clk_enable(bank->clk); - raw_spin_lock_irqsave(&bank->slock, flags); - - data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); - /* set bit to 1 for output, 0 for input */ - if (!input) - data |= BIT(pin); - else - data &= ~BIT(pin); - writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR); - - raw_spin_unlock_irqrestore(&bank->slock, flags); - clk_disable(bank->clk); - - return 0; -} - -static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, - unsigned offset, bool input) -{ - struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); - struct gpio_chip *chip; - int pin; - - chip = range->gc; - pin = offset - chip->base; - dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n", - offset, range->name, pin, input ? "input" : "output"); - - return _rockchip_pmx_gpio_set_direction(chip, offset - chip->base, - input); -} - static const struct pinmux_ops rockchip_pmx_ops = { .get_functions_count = rockchip_pmx_get_funcs_count, .get_function_name = rockchip_pmx_get_func_name, .get_function_groups = rockchip_pmx_get_groups, .set_mux = rockchip_pmx_set, - .gpio_set_direction = rockchip_pmx_gpio_set_direction, }; /* @@ -2426,15 +2337,13 @@ static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl, return false; } -static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value); -static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset); - /* set the pin config settings for a specified pin */ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned num_configs) { struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); struct rockchip_pin_bank *bank = pin_to_bank(info, pin); + struct gpio_chip *gpio = &bank->gpio_chip; enum pin_config_param param; u32 arg; int i; @@ -2467,10 +2376,13 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, return rc; break; case PIN_CONFIG_OUTPUT: - rockchip_gpio_set(&bank->gpio_chip, - pin - bank->pin_base, arg); - rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip, - pin - bank->pin_base, false); + rc = rockchip_set_mux(bank, pin - bank->pin_base, + RK_FUNC_GPIO); + if (rc != RK_FUNC_GPIO) + return -EINVAL; + + rc = gpio->direction_output(gpio, pin - bank->pin_base, + arg); if (rc) return rc; break; @@ -2508,6 +2420,7 @@ static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, { struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); struct rockchip_pin_bank *bank = pin_to_bank(info, pin); + struct gpio_chip *gpio = &bank->gpio_chip; enum pin_config_param param = pinconf_to_config_param(*config); u16 arg; int rc; @@ -2536,7 +2449,7 @@ static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, if (rc != RK_FUNC_GPIO) return -EINVAL; - rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base); + rc = gpio->get(gpio, pin - bank->pin_base); if (rc < 0) return rc; @@ -2774,7 +2687,7 @@ static int rockchip_pinctrl_register(struct platform_device *pdev, ctrldesc->npins = info->ctrl->nr_pins; pdesc = pindesc; - for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) { + for (bank = 0, k = 0; bank < info->ctrl->nr_banks; bank++) { pin_bank = &info->ctrl->pin_banks[bank]; for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) { pdesc->number = k; @@ -2794,553 +2707,9 @@ static int rockchip_pinctrl_register(struct platform_device *pdev, return PTR_ERR(info->pctl_dev); } - for (bank = 0; bank < info->ctrl->nr_banks; ++bank) { - pin_bank = &info->ctrl->pin_banks[bank]; - pin_bank->grange.name = pin_bank->name; - pin_bank->grange.id = bank; - pin_bank->grange.pin_base = pin_bank->pin_base; - pin_bank->grange.base = pin_bank->gpio_chip.base; - pin_bank->grange.npins = pin_bank->gpio_chip.ngpio; - pin_bank->grange.gc = &pin_bank->gpio_chip; - pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange); - } - return 0; } -/* - * GPIO handling - */ - -static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value) -{ - struct rockchip_pin_bank *bank = gpiochip_get_data(gc); - void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR; - unsigned long flags; - u32 data; - - clk_enable(bank->clk); - raw_spin_lock_irqsave(&bank->slock, flags); - - data = readl(reg); - data &= ~BIT(offset); - if (value) - data |= BIT(offset); - writel(data, reg); - - raw_spin_unlock_irqrestore(&bank->slock, flags); - clk_disable(bank->clk); -} - -/* - * Returns the level of the pin for input direction and setting of the DR - * register for output gpios. - */ -static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset) -{ - struct rockchip_pin_bank *bank = gpiochip_get_data(gc); - u32 data; - - clk_enable(bank->clk); - data = readl(bank->reg_base + GPIO_EXT_PORT); - clk_disable(bank->clk); - data >>= offset; - data &= 1; - return data; -} - -/* - * gpiolib gpio_direction_input callback function. The setting of the pin - * mux function as 'gpio input' will be handled by the pinctrl subsystem - * interface. - */ -static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_gpio_direction_input(gc->base + offset); -} - -/* - * gpiolib gpio_direction_output callback function. The setting of the pin - * mux function as 'gpio output' will be handled by the pinctrl subsystem - * interface. - */ -static int rockchip_gpio_direction_output(struct gpio_chip *gc, - unsigned offset, int value) -{ - rockchip_gpio_set(gc, offset, value); - return pinctrl_gpio_direction_output(gc->base + offset); -} - -static void rockchip_gpio_set_debounce(struct gpio_chip *gc, - unsigned int offset, bool enable) -{ - struct rockchip_pin_bank *bank = gpiochip_get_data(gc); - void __iomem *reg = bank->reg_base + GPIO_DEBOUNCE; - unsigned long flags; - u32 data; - - clk_enable(bank->clk); - raw_spin_lock_irqsave(&bank->slock, flags); - - data = readl(reg); - if (enable) - data |= BIT(offset); - else - data &= ~BIT(offset); - writel(data, reg); - - raw_spin_unlock_irqrestore(&bank->slock, flags); - clk_disable(bank->clk); -} - -/* - * gpiolib set_config callback function. The setting of the pin - * mux function as 'gpio output' will be handled by the pinctrl subsystem - * interface. - */ -static int rockchip_gpio_set_config(struct gpio_chip *gc, unsigned int offset, - unsigned long config) -{ - enum pin_config_param param = pinconf_to_config_param(config); - - switch (param) { - case PIN_CONFIG_INPUT_DEBOUNCE: - rockchip_gpio_set_debounce(gc, offset, true); - /* - * Rockchip's gpio could only support up to one period - * of the debounce clock(pclk), which is far away from - * satisftying the requirement, as pclk is usually near - * 100MHz shared by all peripherals. So the fact is it - * has crippled debounce capability could only be useful - * to prevent any spurious glitches from waking up the system - * if the gpio is conguired as wakeup interrupt source. Let's - * still return -ENOTSUPP as before, to make sure the caller - * of gpiod_set_debounce won't change its behaviour. - */ - return -ENOTSUPP; - default: - return -ENOTSUPP; - } -} - -/* - * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin - * and a virtual IRQ, if not already present. - */ -static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset) -{ - struct rockchip_pin_bank *bank = gpiochip_get_data(gc); - unsigned int virq; - - if (!bank->domain) - return -ENXIO; - - clk_enable(bank->clk); - virq = irq_create_mapping(bank->domain, offset); - clk_disable(bank->clk); - - return (virq) ? : -ENXIO; -} - -static const struct gpio_chip rockchip_gpiolib_chip = { - .request = gpiochip_generic_request, - .free = gpiochip_generic_free, - .set = rockchip_gpio_set, - .get = rockchip_gpio_get, - .get_direction = rockchip_gpio_get_direction, - .direction_input = rockchip_gpio_direction_input, - .direction_output = rockchip_gpio_direction_output, - .set_config = rockchip_gpio_set_config, - .to_irq = rockchip_gpio_to_irq, - .owner = THIS_MODULE, -}; - -/* - * Interrupt handling - */ - -static void rockchip_irq_demux(struct irq_desc *desc) -{ - struct irq_chip *chip = irq_desc_get_chip(desc); - struct rockchip_pin_bank *bank = irq_desc_get_handler_data(desc); - u32 pend; - - dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name); - - chained_irq_enter(chip, desc); - - pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS); - - while (pend) { - unsigned int irq, virq; - - irq = __ffs(pend); - pend &= ~BIT(irq); - virq = irq_find_mapping(bank->domain, irq); - - if (!virq) { - dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq); - continue; - } - - dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq); - - /* - * Triggering IRQ on both rising and falling edge - * needs manual intervention. - */ - if (bank->toggle_edge_mode & BIT(irq)) { - u32 data, data_old, polarity; - unsigned long flags; - - data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT); - do { - raw_spin_lock_irqsave(&bank->slock, flags); - - polarity = readl_relaxed(bank->reg_base + - GPIO_INT_POLARITY); - if (data & BIT(irq)) - polarity &= ~BIT(irq); - else - polarity |= BIT(irq); - writel(polarity, - bank->reg_base + GPIO_INT_POLARITY); - - raw_spin_unlock_irqrestore(&bank->slock, flags); - - data_old = data; - data = readl_relaxed(bank->reg_base + - GPIO_EXT_PORT); - } while ((data & BIT(irq)) != (data_old & BIT(irq))); - } - - generic_handle_irq(virq); - } - - chained_irq_exit(chip, desc); -} - -static int rockchip_irq_set_type(struct irq_data *d, unsigned int type) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct rockchip_pin_bank *bank = gc->private; - u32 mask = BIT(d->hwirq); - u32 polarity; - u32 level; - u32 data; - unsigned long flags; - int ret; - - /* make sure the pin is configured as gpio input */ - ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO); - if (ret < 0) - return ret; - - clk_enable(bank->clk); - raw_spin_lock_irqsave(&bank->slock, flags); - - data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); - data &= ~mask; - writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR); - - raw_spin_unlock_irqrestore(&bank->slock, flags); - - if (type & IRQ_TYPE_EDGE_BOTH) - irq_set_handler_locked(d, handle_edge_irq); - else - irq_set_handler_locked(d, handle_level_irq); - - raw_spin_lock_irqsave(&bank->slock, flags); - irq_gc_lock(gc); - - level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL); - polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY); - - switch (type) { - case IRQ_TYPE_EDGE_BOTH: - bank->toggle_edge_mode |= mask; - level |= mask; - - /* - * Determine gpio state. If 1 next interrupt should be falling - * otherwise rising. - */ - data = readl(bank->reg_base + GPIO_EXT_PORT); - if (data & mask) - polarity &= ~mask; - else - polarity |= mask; - break; - case IRQ_TYPE_EDGE_RISING: - bank->toggle_edge_mode &= ~mask; - level |= mask; - polarity |= mask; - break; - case IRQ_TYPE_EDGE_FALLING: - bank->toggle_edge_mode &= ~mask; - level |= mask; - polarity &= ~mask; - break; - case IRQ_TYPE_LEVEL_HIGH: - bank->toggle_edge_mode &= ~mask; - level &= ~mask; - polarity |= mask; - break; - case IRQ_TYPE_LEVEL_LOW: - bank->toggle_edge_mode &= ~mask; - level &= ~mask; - polarity &= ~mask; - break; - default: - irq_gc_unlock(gc); - raw_spin_unlock_irqrestore(&bank->slock, flags); - clk_disable(bank->clk); - return -EINVAL; - } - - writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL); - writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY); - - irq_gc_unlock(gc); - raw_spin_unlock_irqrestore(&bank->slock, flags); - clk_disable(bank->clk); - - return 0; -} - -static void rockchip_irq_suspend(struct irq_data *d) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct rockchip_pin_bank *bank = gc->private; - - clk_enable(bank->clk); - bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK); - irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK); - clk_disable(bank->clk); -} - -static void rockchip_irq_resume(struct irq_data *d) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct rockchip_pin_bank *bank = gc->private; - - clk_enable(bank->clk); - irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK); - clk_disable(bank->clk); -} - -static void rockchip_irq_enable(struct irq_data *d) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct rockchip_pin_bank *bank = gc->private; - - clk_enable(bank->clk); - irq_gc_mask_clr_bit(d); -} - -static void rockchip_irq_disable(struct irq_data *d) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct rockchip_pin_bank *bank = gc->private; - - irq_gc_mask_set_bit(d); - clk_disable(bank->clk); -} - -static int rockchip_interrupts_register(struct platform_device *pdev, - struct rockchip_pinctrl *info) -{ - struct rockchip_pin_ctrl *ctrl = info->ctrl; - struct rockchip_pin_bank *bank = ctrl->pin_banks; - unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; - struct irq_chip_generic *gc; - int ret; - int i; - - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - if (!bank->valid) { - dev_warn(&pdev->dev, "bank %s is not valid\n", - bank->name); - continue; - } - - ret = clk_enable(bank->clk); - if (ret) { - dev_err(&pdev->dev, "failed to enable clock for bank %s\n", - bank->name); - continue; - } - - bank->domain = irq_domain_add_linear(bank->of_node, 32, - &irq_generic_chip_ops, NULL); - if (!bank->domain) { - dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n", - bank->name); - clk_disable(bank->clk); - continue; - } - - ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1, - "rockchip_gpio_irq", handle_level_irq, - clr, 0, 0); - if (ret) { - dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n", - bank->name); - irq_domain_remove(bank->domain); - clk_disable(bank->clk); - continue; - } - - gc = irq_get_domain_generic_chip(bank->domain, 0); - gc->reg_base = bank->reg_base; - gc->private = bank; - gc->chip_types[0].regs.mask = GPIO_INTMASK; - gc->chip_types[0].regs.ack = GPIO_PORTS_EOI; - gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit; - gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit; - gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit; - gc->chip_types[0].chip.irq_enable = rockchip_irq_enable; - gc->chip_types[0].chip.irq_disable = rockchip_irq_disable; - gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake; - gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend; - gc->chip_types[0].chip.irq_resume = rockchip_irq_resume; - gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type; - gc->wake_enabled = IRQ_MSK(bank->nr_pins); - - /* - * Linux assumes that all interrupts start out disabled/masked. - * Our driver only uses the concept of masked and always keeps - * things enabled, so for us that's all masked and all enabled. - */ - writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK); - writel_relaxed(0xffffffff, bank->reg_base + GPIO_PORTS_EOI); - writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN); - gc->mask_cache = 0xffffffff; - - irq_set_chained_handler_and_data(bank->irq, - rockchip_irq_demux, bank); - clk_disable(bank->clk); - } - - return 0; -} - -static int rockchip_gpiolib_register(struct platform_device *pdev, - struct rockchip_pinctrl *info) -{ - struct rockchip_pin_ctrl *ctrl = info->ctrl; - struct rockchip_pin_bank *bank = ctrl->pin_banks; - struct gpio_chip *gc; - int ret; - int i; - - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - if (!bank->valid) { - dev_warn(&pdev->dev, "bank %s is not valid\n", - bank->name); - continue; - } - - bank->gpio_chip = rockchip_gpiolib_chip; - - gc = &bank->gpio_chip; - gc->base = bank->pin_base; - gc->ngpio = bank->nr_pins; - gc->parent = &pdev->dev; - gc->of_node = bank->of_node; - gc->label = bank->name; - - ret = gpiochip_add_data(gc, bank); - if (ret) { - dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n", - gc->label, ret); - goto fail; - } - } - - rockchip_interrupts_register(pdev, info); - - return 0; - -fail: - for (--i, --bank; i >= 0; --i, --bank) { - if (!bank->valid) - continue; - gpiochip_remove(&bank->gpio_chip); - } - return ret; -} - -static int rockchip_gpiolib_unregister(struct platform_device *pdev, - struct rockchip_pinctrl *info) -{ - struct rockchip_pin_ctrl *ctrl = info->ctrl; - struct rockchip_pin_bank *bank = ctrl->pin_banks; - int i; - - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - if (!bank->valid) - continue; - gpiochip_remove(&bank->gpio_chip); - } - - return 0; -} - -static int rockchip_get_bank_data(struct rockchip_pin_bank *bank, - struct rockchip_pinctrl *info) -{ - struct resource res; - void __iomem *base; - - if (of_address_to_resource(bank->of_node, 0, &res)) { - dev_err(info->dev, "cannot find IO resource for bank\n"); - return -ENOENT; - } - - bank->reg_base = devm_ioremap_resource(info->dev, &res); - if (IS_ERR(bank->reg_base)) - return PTR_ERR(bank->reg_base); - - /* - * special case, where parts of the pull setting-registers are - * part of the PMU register space - */ - if (of_device_is_compatible(bank->of_node, - "rockchip,rk3188-gpio-bank0")) { - struct device_node *node; - - node = of_parse_phandle(bank->of_node->parent, - "rockchip,pmu", 0); - if (!node) { - if (of_address_to_resource(bank->of_node, 1, &res)) { - dev_err(info->dev, "cannot find IO resource for bank\n"); - return -ENOENT; - } - - base = devm_ioremap_resource(info->dev, &res); - if (IS_ERR(base)) - return PTR_ERR(base); - rockchip_regmap_config.max_register = - resource_size(&res) - 4; - rockchip_regmap_config.name = - "rockchip,rk3188-gpio-bank0-pull"; - bank->regmap_pull = devm_regmap_init_mmio(info->dev, - base, - &rockchip_regmap_config); - } - of_node_put(node); - } - - bank->irq = irq_of_parse_and_map(bank->of_node, 0); - - bank->clk = of_clk_get(bank->of_node, 0); - if (IS_ERR(bank->clk)) - return PTR_ERR(bank->clk); - - return clk_prepare(bank->clk); -} - static const struct of_device_id rockchip_pinctrl_dt_match[]; /* retrieve the soc specific data */ @@ -3350,7 +2719,6 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data( { const struct of_device_id *match; struct device_node *node = pdev->dev.of_node; - struct device_node *np; struct rockchip_pin_ctrl *ctrl; struct rockchip_pin_bank *bank; int grf_offs, pmu_offs, drv_grf_offs, drv_pmu_offs, i, j; @@ -3358,23 +2726,6 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data( match = of_match_node(rockchip_pinctrl_dt_match, node); ctrl = (struct rockchip_pin_ctrl *)match->data; - for_each_child_of_node(node, np) { - if (!of_find_property(np, "gpio-controller", NULL)) - continue; - - bank = ctrl->pin_banks; - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - if (!strcmp(bank->name, np->name)) { - bank->of_node = np; - - if (!rockchip_get_bank_data(bank, d)) - bank->valid = true; - - break; - } - } - } - grf_offs = ctrl->grf_mux_offset; pmu_offs = ctrl->pmu_mux_offset; drv_pmu_offs = ctrl->pmu_drv_offset; @@ -3595,18 +2946,18 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev) return PTR_ERR(info->regmap_pmu); } - ret = rockchip_gpiolib_register(pdev, info); + ret = rockchip_pinctrl_register(pdev, info); if (ret) return ret; - ret = rockchip_pinctrl_register(pdev, info); + platform_set_drvdata(pdev, info); + + ret = of_platform_populate(np, rockchip_bank_match, NULL, NULL); if (ret) { - rockchip_gpiolib_unregister(pdev, info); + dev_err(&pdev->dev, "failed to register gpio device\n"); return ret; } - platform_set_drvdata(pdev, info); - return 0; }