[PATCH v5 3/7] gpio: separate gpio driver from pinctrl-rockchip driver
Jianqun Xu
jay.xu at rock-chips.com
Thu May 27 00:12:35 PDT 2021
Separate the gpio driver from the pinctrl driver.
Signed-off-by: Jianqun Xu <jay.xu at rock-chips.com>
---
drivers/gpio/Kconfig | 8 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-rockchip.c | 657 +++++++++++++++++++++++++++
drivers/pinctrl/pinctrl-rockchip.c | 684 +----------------------------
4 files changed, 684 insertions(+), 666 deletions(-)
create mode 100644 drivers/gpio/gpio-rockchip.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 1dd0ec6727fd..764ef6b14678 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -520,6 +520,14 @@ 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 d7c81e1611a4..81e95a0db25b 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -127,6 +127,7 @@ obj-$(CONFIG_GPIO_RDA) += gpio-rda.o
obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o
obj-$(CONFIG_GPIO_REALTEK_OTTO) += gpio-realtek-otto.o
obj-$(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 <heiko at sntech.de>
+ *
+ * Copyright (c) 2021 Rockchip Electronics Co. Ltd.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+
+#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 aa1e726ca361..8195028c2497 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -20,9 +20,9 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/bitops.h>
-#include <linux/gpio/driver.h>
-#include <linux/of_device.h>
+#include <linux/gpio.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
@@ -39,19 +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
/**
* Generate a bitmask for setting a value (v) with a write mask bit in hiword
@@ -2071,86 +2058,11 @@ 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,
};
/*
@@ -2181,15 +2093,13 @@ 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;
@@ -2222,10 +2132,13 @@ 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;
@@ -2263,6 +2176,7 @@ 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;
@@ -2291,7 +2205,7 @@ 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;
@@ -2529,7 +2443,7 @@ 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;
@@ -2549,553 +2463,9 @@ 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 */
@@ -3105,7 +2475,6 @@ 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;
@@ -3113,23 +2482,6 @@ 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;
@@ -3350,18 +2702,18 @@ 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;
}
--
2.25.1
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