* [PATCH v7 4/9] dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
@ 2021-07-26 1:34 ` Jianqun Xu
2021-07-26 22:20 ` Rob Herring
2021-07-26 1:35 ` [PATCH v7 5/9] gpio/rockchip: add driver for rockchip gpio Jianqun Xu
` (4 subsequent siblings)
5 siblings, 1 reply; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:34 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Liang Chen
From: Liang Chen <cl@rock-chips.com>
The clock property need 2 items on some rockchip chips.
Signed-off-by: Liang Chen <cl@rock-chips.com>
---
v7:
- none
v6:
- add to this serials
.../devicetree/bindings/gpio/rockchip,gpio-bank.yaml | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index d993e002cebe..0d62c28fb58d 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -22,7 +22,10 @@ properties:
maxItems: 1
clocks:
- maxItems: 1
+ minItems: 1
+ items:
+ - description: APB interface clock source
+ - description: GPIO debounce reference clock source
gpio-controller: true
--
2.25.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH v7 4/9] dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank
2021-07-26 1:34 ` [PATCH v7 4/9] dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank Jianqun Xu
@ 2021-07-26 22:20 ` Rob Herring
0 siblings, 0 replies; 9+ messages in thread
From: Rob Herring @ 2021-07-26 22:20 UTC (permalink / raw)
To: Jianqun Xu
Cc: devicetree, heiko, linux-gpio, linus.walleij, linux-kernel,
robh+dt, bgolaszewski, Liang Chen, linux-rockchip
On Mon, 26 Jul 2021 09:34:57 +0800, Jianqun Xu wrote:
> From: Liang Chen <cl@rock-chips.com>
>
> The clock property need 2 items on some rockchip chips.
>
> Signed-off-by: Liang Chen <cl@rock-chips.com>
> ---
> v7:
> - none
> v6:
> - add to this serials
>
> .../devicetree/bindings/gpio/rockchip,gpio-bank.yaml | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
Acked-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v7 5/9] gpio/rockchip: add driver for rockchip gpio
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
2021-07-26 1:34 ` [PATCH v7 4/9] dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank Jianqun Xu
@ 2021-07-26 1:35 ` Jianqun Xu
2021-07-27 13:38 ` Bartosz Golaszewski
2021-07-26 1:35 ` [PATCH v7 6/9] gpio/rockchip: use struct rockchip_gpio_regs for gpio controller Jianqun Xu
` (3 subsequent siblings)
5 siblings, 1 reply; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:35 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Jianqun Xu
This patch add support for rockchip gpio controller, which is supported
in pinctrl driver in the past.
With this patch, the pinctrl-rockchip driver will drop gpio related
codes and populate platform driver to gpio-rockchip.
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
v7:
- include gpio/driver.h instead of gpio.h, suggested by Walleij
- use gpio align id instead of gpio bank name
v6:
- reorder patches suggested by heiko
drivers/gpio/Kconfig | 8 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-rockchip.c | 626 +++++++++++++++++++++++++++++++++++
3 files changed, 635 insertions(+)
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..b455fcf7efda
--- /dev/null
+++ b/drivers/gpio/gpio-rockchip.c
@@ -0,0 +1,626 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2013 MundoReader S.L.
+ * Author: Heiko Stuebner <heiko@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;
+
+ data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ 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;
+
+ 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);
+
+ 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;
+
+ 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);
+}
+
+static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
+ u32 data;
+
+ data = readl(bank->reg_base + GPIO_EXT_PORT);
+ 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;
+
+ 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);
+}
+
+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;
+
+ virq = irq_create_mapping(bank->domain, offset);
+
+ 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;
+
+ 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);
+
+ 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;
+
+ bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
+ irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
+}
+
+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;
+
+ irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
+}
+
+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;
+
+ 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;
+
+ 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);
+ 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);
+ 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);
+
+ 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_enable(bank->clk);
+
+ bank->clk = NULL;
+ return 0;
+}
+
+static struct rockchip_pin_bank *
+rockchip_gpio_find_bank(struct pinctrl_dev *pctldev, int id)
+{
+ 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 (bank->bank_num == id) {
+ 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;
+ static int gpio;
+ int id, ret;
+
+ if (!np || !pctlnp)
+ return -ENODEV;
+
+ pctldev = of_pinctrl_get(pctlnp);
+ if (!pctldev)
+ return -EPROBE_DEFER;
+
+ id = of_alias_get_id(np, "gpio");
+ if (id < 0)
+ id = gpio++;
+
+ bank = rockchip_gpio_find_bank(pctldev, id);
+ 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);
--
2.25.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH v7 5/9] gpio/rockchip: add driver for rockchip gpio
2021-07-26 1:35 ` [PATCH v7 5/9] gpio/rockchip: add driver for rockchip gpio Jianqun Xu
@ 2021-07-27 13:38 ` Bartosz Golaszewski
0 siblings, 0 replies; 9+ messages in thread
From: Bartosz Golaszewski @ 2021-07-27 13:38 UTC (permalink / raw)
To: Jianqun Xu
Cc: Linus Walleij, Heiko Stübner, Rob Herring, linux-gpio,
linux-devicetree, open list:ARM/Rockchip SoC...,
LKML
On Mon, Jul 26, 2021 at 3:35 AM Jianqun Xu <jay.xu@rock-chips.com> wrote:
>
> This patch add support for rockchip gpio controller, which is supported
> in pinctrl driver in the past.
>
> With this patch, the pinctrl-rockchip driver will drop gpio related
> codes and populate platform driver to gpio-rockchip.
>
> Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
> ---
> v7:
> - include gpio/driver.h instead of gpio.h, suggested by Walleij
> - use gpio align id instead of gpio bank name
> v6:
> - reorder patches suggested by heiko
>
> drivers/gpio/Kconfig | 8 +
> drivers/gpio/Makefile | 1 +
> drivers/gpio/gpio-rockchip.c | 626 +++++++++++++++++++++++++++++++++++
> 3 files changed, 635 insertions(+)
> 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..b455fcf7efda
> --- /dev/null
> +++ b/drivers/gpio/gpio-rockchip.c
> @@ -0,0 +1,626 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2013 MundoReader S.L.
> + * Author: Heiko Stuebner <heiko@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>
Doesn't look like you're actually using regmap.
> +
> +#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;
> +
> + data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
> + 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;
> +
> + 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);
> +
> + 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;
> +
> + 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);
> +}
> +
> +static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
> +{
> + struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
> + u32 data;
> +
> + data = readl(bank->reg_base + GPIO_EXT_PORT);
> + 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;
> +
> + 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);
> +}
> +
> +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;
> +
> + virq = irq_create_mapping(bank->domain, offset);
> +
> + 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;
> +
> + 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);
> +
> + 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;
> +
> + bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
> + irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
> +}
> +
> +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;
> +
> + irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
> +}
> +
> +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;
> +
> + 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;
> +
> + 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);
> + 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);
> + 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);
> +
> + 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_enable(bank->clk);
> +
> + bank->clk = NULL;
> + return 0;
> +}
> +
> +static struct rockchip_pin_bank *
> +rockchip_gpio_find_bank(struct pinctrl_dev *pctldev, int id)
> +{
> + 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 (bank->bank_num == id) {
> + 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;
> + static int gpio;
> + int id, ret;
> +
> + if (!np || !pctlnp)
> + return -ENODEV;
> +
> + pctldev = of_pinctrl_get(pctlnp);
> + if (!pctldev)
> + return -EPROBE_DEFER;
> +
> + id = of_alias_get_id(np, "gpio");
> + if (id < 0)
> + id = gpio++;
> +
> + bank = rockchip_gpio_find_bank(pctldev, id);
> + 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);
All release functions for devres will be called after the remove()
callback so you can use the devm variant for adding the chip. In fact
- I would prefer the clk_disable_unprepare() to be called in a
callback registered with devm_add_action_or_reset() which will also
simplify the error handling in probe.
> +
> + 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);
Mind to add a comment why this is needed?
> +
> +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);
> --
> 2.25.1
>
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v7 6/9] gpio/rockchip: use struct rockchip_gpio_regs for gpio controller
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
2021-07-26 1:34 ` [PATCH v7 4/9] dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank Jianqun Xu
2021-07-26 1:35 ` [PATCH v7 5/9] gpio/rockchip: add driver for rockchip gpio Jianqun Xu
@ 2021-07-26 1:35 ` Jianqun Xu
2021-07-26 1:35 ` [PATCH v7 7/9] gpio/rockchip: support next version " Jianqun Xu
` (2 subsequent siblings)
5 siblings, 0 replies; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:35 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Jianqun Xu
Store register offsets in the struct rockchip_gpio_regs, this patch
prepare for the driver update for new gpio controller.
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
v7:
- none. from v1
drivers/gpio/gpio-rockchip.c | 86 ++++++++++++++++--------------
drivers/pinctrl/pinctrl-rockchip.h | 38 +++++++++++++
2 files changed, 85 insertions(+), 39 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index b455fcf7efda..d6c07a957bd8 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -24,19 +24,21 @@
#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
+#define GPIO_TYPE_V1 (0) /* GPIO Version ID reserved */
+
+static const struct rockchip_gpio_regs gpio_regs_v1 = {
+ .port_dr = 0x00,
+ .port_ddr = 0x04,
+ .int_en = 0x30,
+ .int_mask = 0x34,
+ .int_type = 0x38,
+ .int_polarity = 0x3c,
+ .int_status = 0x40,
+ .int_rawstatus = 0x44,
+ .debounce = 0x48,
+ .port_eoi = 0x4c,
+ .ext_port = 0x50,
+};
static int rockchip_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
@@ -44,7 +46,7 @@ static int rockchip_gpio_get_direction(struct gpio_chip *chip,
struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
u32 data;
- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
if (data & BIT(offset))
return GPIO_LINE_DIRECTION_OUT;
@@ -60,13 +62,13 @@ static int rockchip_gpio_set_direction(struct gpio_chip *chip,
raw_spin_lock_irqsave(&bank->slock, flags);
- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_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);
+ writel_relaxed(data, bank->reg_base + bank->gpio_regs->port_ddr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
@@ -77,7 +79,7 @@ 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;
+ void __iomem *reg = bank->reg_base + bank->gpio_regs->port_dr;
unsigned long flags;
u32 data;
@@ -97,9 +99,10 @@ static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
u32 data;
- data = readl(bank->reg_base + GPIO_EXT_PORT);
+ data = readl(bank->reg_base + bank->gpio_regs->ext_port);
data >>= offset;
data &= 1;
+
return data;
}
@@ -107,7 +110,7 @@ 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;
+ void __iomem *reg = bank->reg_base + bank->gpio_regs->debounce;
unsigned long flags;
u32 data;
@@ -207,7 +210,7 @@ static void rockchip_irq_demux(struct irq_desc *desc)
chained_irq_enter(chip, desc);
- pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
+ pend = readl_relaxed(bank->reg_base + bank->gpio_regs->int_status);
while (pend) {
unsigned int irq, virq;
@@ -231,24 +234,26 @@ static void rockchip_irq_demux(struct irq_desc *desc)
u32 data, data_old, polarity;
unsigned long flags;
- data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
+ data = readl_relaxed(bank->reg_base +
+ bank->gpio_regs->ext_port);
do {
raw_spin_lock_irqsave(&bank->slock, flags);
polarity = readl_relaxed(bank->reg_base +
- GPIO_INT_POLARITY);
+ bank->gpio_regs->int_polarity);
if (data & BIT(irq))
polarity &= ~BIT(irq);
else
polarity |= BIT(irq);
writel(polarity,
- bank->reg_base + GPIO_INT_POLARITY);
+ bank->reg_base +
+ bank->gpio_regs->int_polarity);
raw_spin_unlock_irqrestore(&bank->slock, flags);
data_old = data;
data = readl_relaxed(bank->reg_base +
- GPIO_EXT_PORT);
+ bank->gpio_regs->ext_port);
} while ((data & BIT(irq)) != (data_old & BIT(irq)));
}
@@ -270,9 +275,9 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
raw_spin_lock_irqsave(&bank->slock, flags);
- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
data &= ~mask;
- writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
+ writel_relaxed(data, bank->reg_base + bank->gpio_regs->port_ddr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
@@ -284,8 +289,8 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
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);
+ level = readl_relaxed(gc->reg_base + bank->gpio_regs->int_type);
+ polarity = readl_relaxed(gc->reg_base + bank->gpio_regs->int_polarity);
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
@@ -296,7 +301,7 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
* Determine gpio state. If 1 next interrupt should be falling
* otherwise rising.
*/
- data = readl(bank->reg_base + GPIO_EXT_PORT);
+ data = readl(bank->reg_base + bank->gpio_regs->ext_port);
if (data & mask)
polarity &= ~mask;
else
@@ -329,8 +334,8 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}
- writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
- writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
+ writel_relaxed(level, gc->reg_base + bank->gpio_regs->int_type);
+ writel_relaxed(polarity, gc->reg_base + bank->gpio_regs->int_polarity);
irq_gc_unlock(gc);
raw_spin_unlock_irqrestore(&bank->slock, flags);
@@ -343,8 +348,8 @@ 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;
- bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
- irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
+ bank->saved_masks = irq_reg_readl(gc, bank->gpio_regs->int_mask);
+ irq_reg_writel(gc, ~gc->wake_active, bank->gpio_regs->int_mask);
}
static void rockchip_irq_resume(struct irq_data *d)
@@ -352,7 +357,7 @@ 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;
- irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
+ irq_reg_writel(gc, bank->saved_masks, bank->gpio_regs->int_mask);
}
static void rockchip_irq_enable(struct irq_data *d)
@@ -400,8 +405,8 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
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].regs.mask = bank->gpio_regs->int_mask;
+ gc->chip_types[0].regs.ack = bank->gpio_regs->port_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;
@@ -418,9 +423,9 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
* 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);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->int_mask);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->port_eoi);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->int_en);
gc->mask_cache = 0xffffffff;
irq_set_chained_handler_and_data(bank->irq,
@@ -510,6 +515,9 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
bank->irq = irq_of_parse_and_map(bank->of_node, 0);
+ bank->gpio_regs = &gpio_regs_v1;
+ bank->gpio_type = GPIO_TYPE_V1;
+
bank->clk = of_clk_get(bank->of_node, 0);
if (!IS_ERR(bank->clk))
return clk_prepare_enable(bank->clk);
diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
index 4aa3d2f1fa67..1b774b6bbc3e 100644
--- a/drivers/pinctrl/pinctrl-rockchip.h
+++ b/drivers/pinctrl/pinctrl-rockchip.h
@@ -32,6 +32,42 @@ enum rockchip_pinctrl_type {
RK3568,
};
+/**
+ * struct rockchip_gpio_regs
+ * @port_dr: data register
+ * @port_ddr: data direction register
+ * @int_en: interrupt enable
+ * @int_mask: interrupt mask
+ * @int_type: interrupt trigger type, such as high, low, edge trriger type.
+ * @int_polarity: interrupt polarity enable register
+ * @int_bothedge: interrupt bothedge enable register
+ * @int_status: interrupt status register
+ * @int_rawstatus: int_status = int_rawstatus & int_mask
+ * @debounce: enable debounce for interrupt signal
+ * @dbclk_div_en: enable divider for debounce clock
+ * @dbclk_div_con: setting for divider of debounce clock
+ * @port_eoi: end of interrupt of the port
+ * @ext_port: port data from external
+ * @version_id: controller version register
+ */
+struct rockchip_gpio_regs {
+ u32 port_dr;
+ u32 port_ddr;
+ u32 int_en;
+ u32 int_mask;
+ u32 int_type;
+ u32 int_polarity;
+ u32 int_bothedge;
+ u32 int_status;
+ u32 int_rawstatus;
+ u32 debounce;
+ u32 dbclk_div_en;
+ u32 dbclk_div_con;
+ u32 port_eoi;
+ u32 ext_port;
+ u32 version_id;
+};
+
/**
* struct rockchip_iomux
* @type: iomux variant using IOMUX_* constants
@@ -126,6 +162,8 @@ struct rockchip_pin_bank {
struct gpio_chip gpio_chip;
struct pinctrl_gpio_range grange;
raw_spinlock_t slock;
+ const struct rockchip_gpio_regs *gpio_regs;
+ u32 gpio_type;
u32 toggle_edge_mode;
u32 recalced_mask;
u32 route_mask;
--
2.25.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 7/9] gpio/rockchip: support next version gpio controller
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
` (2 preceding siblings ...)
2021-07-26 1:35 ` [PATCH v7 6/9] gpio/rockchip: use struct rockchip_gpio_regs for gpio controller Jianqun Xu
@ 2021-07-26 1:35 ` Jianqun Xu
2021-07-26 1:35 ` [PATCH v7 8/9] gpio/rockchip: drop irq_gc_lock/irq_gc_unlock for irq set type Jianqun Xu
2021-07-26 1:35 ` [PATCH v7 9/9] pinctrl/rockchip: drop the gpio related codes Jianqun Xu
5 siblings, 0 replies; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:35 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Jianqun Xu
The next version gpio controller on SoCs like rk3568 have more write
mask bits for registers.
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
v7:
- none
v6:
- reorder patches suggested by heiko
drivers/gpio/gpio-rockchip.c | 283 +++++++++++++++++++++--------
drivers/pinctrl/pinctrl-rockchip.h | 2 +
2 files changed, 213 insertions(+), 72 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index d6c07a957bd8..b2be56040289 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -25,6 +25,7 @@
#include "../pinctrl/pinctrl-rockchip.h"
#define GPIO_TYPE_V1 (0) /* GPIO Version ID reserved */
+#define GPIO_TYPE_V2 (0x01000C2B) /* GPIO Version ID 0x01000C2B */
static const struct rockchip_gpio_regs gpio_regs_v1 = {
.port_dr = 0x00,
@@ -40,13 +41,106 @@ static const struct rockchip_gpio_regs gpio_regs_v1 = {
.ext_port = 0x50,
};
+static const struct rockchip_gpio_regs gpio_regs_v2 = {
+ .port_dr = 0x00,
+ .port_ddr = 0x08,
+ .int_en = 0x10,
+ .int_mask = 0x18,
+ .int_type = 0x20,
+ .int_polarity = 0x28,
+ .int_bothedge = 0x30,
+ .int_status = 0x50,
+ .int_rawstatus = 0x58,
+ .debounce = 0x38,
+ .dbclk_div_en = 0x40,
+ .dbclk_div_con = 0x48,
+ .port_eoi = 0x60,
+ .ext_port = 0x70,
+ .version_id = 0x78,
+};
+
+static inline void gpio_writel_v2(u32 val, void __iomem *reg)
+{
+ writel((val & 0xffff) | 0xffff0000, reg);
+ writel((val >> 16) | 0xffff0000, reg + 0x4);
+}
+
+static inline u32 gpio_readl_v2(void __iomem *reg)
+{
+ return readl(reg + 0x4) << 16 | readl(reg);
+}
+
+static inline void rockchip_gpio_writel(struct rockchip_pin_bank *bank,
+ u32 value, unsigned int offset)
+{
+ void __iomem *reg = bank->reg_base + offset;
+
+ if (bank->gpio_type == GPIO_TYPE_V2)
+ gpio_writel_v2(value, reg);
+ else
+ writel(value, reg);
+}
+
+static inline u32 rockchip_gpio_readl(struct rockchip_pin_bank *bank,
+ unsigned int offset)
+{
+ void __iomem *reg = bank->reg_base + offset;
+ u32 value;
+
+ if (bank->gpio_type == GPIO_TYPE_V2)
+ value = gpio_readl_v2(reg);
+ else
+ value = readl(reg);
+
+ return value;
+}
+
+static inline void rockchip_gpio_writel_bit(struct rockchip_pin_bank *bank,
+ u32 bit, u32 value,
+ unsigned int offset)
+{
+ void __iomem *reg = bank->reg_base + offset;
+ u32 data;
+
+ if (bank->gpio_type == GPIO_TYPE_V2) {
+ if (value)
+ data = BIT(bit % 16) | BIT(bit % 16 + 16);
+ else
+ data = BIT(bit % 16 + 16);
+ writel(data, bit >= 16 ? reg + 0x4 : reg);
+ } else {
+ data = readl(reg);
+ data &= ~BIT(bit);
+ if (value)
+ data |= BIT(bit);
+ writel(data, reg);
+ }
+}
+
+static inline u32 rockchip_gpio_readl_bit(struct rockchip_pin_bank *bank,
+ u32 bit, unsigned int offset)
+{
+ void __iomem *reg = bank->reg_base + offset;
+ u32 data;
+
+ if (bank->gpio_type == GPIO_TYPE_V2) {
+ data = readl(bit >= 16 ? reg + 0x4 : reg);
+ data >>= bit % 16;
+ } else {
+ data = readl(reg);
+ data >>= bit;
+ }
+
+ return data & (0x1);
+}
+
static int rockchip_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
u32 data;
- data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
+ data = rockchip_gpio_readl_bit(bank, offset, bank->gpio_regs->port_ddr);
if (data & BIT(offset))
return GPIO_LINE_DIRECTION_OUT;
@@ -58,18 +152,10 @@ static int rockchip_gpio_set_direction(struct gpio_chip *chip,
{
struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
unsigned long flags;
- u32 data;
+ u32 data = input ? 0 : 1;
raw_spin_lock_irqsave(&bank->slock, flags);
-
- data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_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 + bank->gpio_regs->port_ddr);
-
+ rockchip_gpio_writel_bit(bank, offset, data, bank->gpio_regs->port_ddr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
return 0;
@@ -79,18 +165,10 @@ 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 + bank->gpio_regs->port_dr;
unsigned long flags;
- u32 data;
raw_spin_lock_irqsave(&bank->slock, flags);
-
- data = readl(reg);
- data &= ~BIT(offset);
- if (value)
- data |= BIT(offset);
- writel(data, reg);
-
+ rockchip_gpio_writel_bit(bank, offset, value, bank->gpio_regs->port_dr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
}
@@ -106,24 +184,65 @@ static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
return data;
}
-static void rockchip_gpio_set_debounce(struct gpio_chip *gc,
- unsigned int offset, bool enable)
+static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
+ unsigned int offset,
+ unsigned int debounce)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
- void __iomem *reg = bank->reg_base + bank->gpio_regs->debounce;
- unsigned long flags;
- u32 data;
+ const struct rockchip_gpio_regs *reg = bank->gpio_regs;
+ unsigned long flags, div_reg, freq, max_debounce;
+ bool div_debounce_support;
+ unsigned int cur_div_reg;
+ u64 div;
+
+ if (!IS_ERR(bank->db_clk)) {
+ div_debounce_support = true;
+ freq = clk_get_rate(bank->db_clk);
+ max_debounce = (GENMASK(23, 0) + 1) * 2 * 1000000 / freq;
+ if (debounce > max_debounce)
+ return -EINVAL;
+
+ div = debounce * freq;
+ div_reg = DIV_ROUND_CLOSEST_ULL(div, 2 * USEC_PER_SEC) - 1;
+ } else {
+ div_debounce_support = false;
+ }
raw_spin_lock_irqsave(&bank->slock, flags);
- data = readl(reg);
- if (enable)
- data |= BIT(offset);
- else
- data &= ~BIT(offset);
- writel(data, reg);
+ /* Only the v1 needs to configure div_en and div_con for dbclk */
+ if (debounce) {
+ if (div_debounce_support) {
+ /* Configure the max debounce from consumers */
+ cur_div_reg = readl(bank->reg_base +
+ reg->dbclk_div_con);
+ if (cur_div_reg < div_reg)
+ writel(div_reg, bank->reg_base +
+ reg->dbclk_div_con);
+ rockchip_gpio_writel_bit(bank, offset, 1,
+ reg->dbclk_div_en);
+ }
+
+ rockchip_gpio_writel_bit(bank, offset, 1, reg->debounce);
+ } else {
+ if (div_debounce_support)
+ rockchip_gpio_writel_bit(bank, offset, 0,
+ reg->dbclk_div_en);
+
+ rockchip_gpio_writel_bit(bank, offset, 0, reg->debounce);
+ }
raw_spin_unlock_irqrestore(&bank->slock, flags);
+
+ /* Enable or disable dbclk at last */
+ if (div_debounce_support) {
+ if (debounce)
+ clk_prepare_enable(bank->db_clk);
+ else
+ clk_disable_unprepare(bank->db_clk);
+ }
+
+ return 0;
}
static int rockchip_gpio_direction_input(struct gpio_chip *gc,
@@ -272,12 +391,12 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
u32 level;
u32 data;
unsigned long flags;
+ int ret = 0;
raw_spin_lock_irqsave(&bank->slock, flags);
- data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
- data &= ~mask;
- writel_relaxed(data, bank->reg_base + bank->gpio_regs->port_ddr);
+ rockchip_gpio_writel_bit(bank, d->hwirq, 0,
+ bank->gpio_regs->port_ddr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
@@ -289,23 +408,30 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
raw_spin_lock_irqsave(&bank->slock, flags);
irq_gc_lock(gc);
- level = readl_relaxed(gc->reg_base + bank->gpio_regs->int_type);
- polarity = readl_relaxed(gc->reg_base + bank->gpio_regs->int_polarity);
+ level = rockchip_gpio_readl(bank, bank->gpio_regs->int_type);
+ polarity = rockchip_gpio_readl(bank, bank->gpio_regs->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 + bank->gpio_regs->ext_port);
- if (data & mask)
- polarity &= ~mask;
- else
- polarity |= mask;
+ if (bank->gpio_type == GPIO_TYPE_V2) {
+ bank->toggle_edge_mode &= ~mask;
+ rockchip_gpio_writel_bit(bank, d->hwirq, 1,
+ bank->gpio_regs->int_bothedge);
+ goto out;
+ } else {
+ bank->toggle_edge_mode |= mask;
+ level |= mask;
+
+ /*
+ * Determine gpio state. If 1 next interrupt should be
+ * falling otherwise rising.
+ */
+ data = readl(bank->reg_base + bank->gpio_regs->ext_port);
+ if (data & mask)
+ polarity &= ~mask;
+ else
+ polarity |= mask;
+ }
break;
case IRQ_TYPE_EDGE_RISING:
bank->toggle_edge_mode &= ~mask;
@@ -328,19 +454,17 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
polarity &= ~mask;
break;
default:
- irq_gc_unlock(gc);
- raw_spin_unlock_irqrestore(&bank->slock, flags);
- clk_disable(bank->clk);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
- writel_relaxed(level, gc->reg_base + bank->gpio_regs->int_type);
- writel_relaxed(polarity, gc->reg_base + bank->gpio_regs->int_polarity);
-
+ rockchip_gpio_writel(bank, level, bank->gpio_regs->int_type);
+ rockchip_gpio_writel(bank, polarity, bank->gpio_regs->int_polarity);
+out:
irq_gc_unlock(gc);
raw_spin_unlock_irqrestore(&bank->slock, flags);
- return 0;
+ return ret;
}
static void rockchip_irq_suspend(struct irq_data *d)
@@ -362,19 +486,12 @@ static void rockchip_irq_resume(struct irq_data *d)
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;
-
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)
@@ -403,6 +520,11 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
}
gc = irq_get_domain_generic_chip(bank->domain, 0);
+ if (bank->gpio_type == GPIO_TYPE_V2) {
+ gc->reg_writel = gpio_writel_v2;
+ gc->reg_readl = gpio_readl_v2;
+ }
+
gc->reg_base = bank->reg_base;
gc->private = bank;
gc->chip_types[0].regs.mask = bank->gpio_regs->int_mask;
@@ -423,9 +545,9 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
* 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 + bank->gpio_regs->int_mask);
- writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->port_eoi);
- writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->int_en);
+ rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->int_mask);
+ rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->port_eoi);
+ rockchip_gpio_writel(bank, 0xffffffff, bank->gpio_regs->int_en);
gc->mask_cache = 0xffffffff;
irq_set_chained_handler_and_data(bank->irq,
@@ -503,6 +625,7 @@ static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank)
static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
{
struct resource res;
+ int id = 0;
if (of_address_to_resource(bank->of_node, 0, &res)) {
dev_err(bank->dev, "cannot find IO resource for bank\n");
@@ -514,15 +637,31 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
return PTR_ERR(bank->reg_base);
bank->irq = irq_of_parse_and_map(bank->of_node, 0);
-
- bank->gpio_regs = &gpio_regs_v1;
- bank->gpio_type = GPIO_TYPE_V1;
+ if (!bank->irq)
+ return -EINVAL;
bank->clk = of_clk_get(bank->of_node, 0);
- if (!IS_ERR(bank->clk))
- return clk_prepare_enable(bank->clk);
+ if (IS_ERR(bank->clk))
+ return PTR_ERR(bank->clk);
+
+ clk_prepare_enable(bank->clk);
+ id = readl(bank->reg_base + gpio_regs_v2.version_id);
+
+ /* If not gpio v2, that is default to v1. */
+ if (id == GPIO_TYPE_V2) {
+ bank->gpio_regs = &gpio_regs_v2;
+ bank->gpio_type = GPIO_TYPE_V2;
+ bank->db_clk = of_clk_get(bank->of_node, 1);
+ if (IS_ERR(bank->db_clk)) {
+ dev_err(bank->dev, "cannot find debounce clk\n");
+ clk_disable_unprepare(bank->clk);
+ return -EINVAL;
+ }
+ } else {
+ bank->gpio_regs = &gpio_regs_v1;
+ bank->gpio_type = GPIO_TYPE_V1;
+ }
- bank->clk = NULL;
return 0;
}
diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
index 1b774b6bbc3e..589d4d2a98c9 100644
--- a/drivers/pinctrl/pinctrl-rockchip.h
+++ b/drivers/pinctrl/pinctrl-rockchip.h
@@ -121,6 +121,7 @@ struct rockchip_drv {
* @reg_base: register base of the gpio bank
* @regmap_pull: optional separate register for additional pull settings
* @clk: clock of the gpio bank
+ * @db_clk: clock of the gpio debounce
* @irq: interrupt of the gpio bank
* @saved_masks: Saved content of GPIO_INTEN at suspend time.
* @pin_base: first pin number
@@ -146,6 +147,7 @@ struct rockchip_pin_bank {
void __iomem *reg_base;
struct regmap *regmap_pull;
struct clk *clk;
+ struct clk *db_clk;
int irq;
u32 saved_masks;
u32 pin_base;
--
2.25.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 8/9] gpio/rockchip: drop irq_gc_lock/irq_gc_unlock for irq set type
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
` (3 preceding siblings ...)
2021-07-26 1:35 ` [PATCH v7 7/9] gpio/rockchip: support next version " Jianqun Xu
@ 2021-07-26 1:35 ` Jianqun Xu
2021-07-26 1:35 ` [PATCH v7 9/9] pinctrl/rockchip: drop the gpio related codes Jianqun Xu
5 siblings, 0 replies; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:35 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Jianqun Xu
There has spin lock for irq set type already, so drop irq_gc_lock and
irq_gc_unlock.
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
v7:
- none
v6:
- add reviewed by heiko
drivers/gpio/gpio-rockchip.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index b2be56040289..036b2d959503 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -406,7 +406,6 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
irq_set_handler_locked(d, handle_level_irq);
raw_spin_lock_irqsave(&bank->slock, flags);
- irq_gc_lock(gc);
level = rockchip_gpio_readl(bank, bank->gpio_regs->int_type);
polarity = rockchip_gpio_readl(bank, bank->gpio_regs->int_polarity);
@@ -461,7 +460,6 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
rockchip_gpio_writel(bank, level, bank->gpio_regs->int_type);
rockchip_gpio_writel(bank, polarity, bank->gpio_regs->int_polarity);
out:
- irq_gc_unlock(gc);
raw_spin_unlock_irqrestore(&bank->slock, flags);
return ret;
--
2.25.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v7 9/9] pinctrl/rockchip: drop the gpio related codes
[not found] <210726013345.1634442-1-jay.xu@rock-chips.com>
` (4 preceding siblings ...)
2021-07-26 1:35 ` [PATCH v7 8/9] gpio/rockchip: drop irq_gc_lock/irq_gc_unlock for irq set type Jianqun Xu
@ 2021-07-26 1:35 ` Jianqun Xu
5 siblings, 0 replies; 9+ messages in thread
From: Jianqun Xu @ 2021-07-26 1:35 UTC (permalink / raw)
To: linus.walleij, heiko
Cc: bgolaszewski, robh+dt, linux-gpio, devicetree, linux-rockchip,
linux-kernel, Jianqun Xu
With the patch to separate the gpio driver from the pinctrl driver, now
the pinctrl-rockchip can drop the gpio related codes now.
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
v7:
- none, from v1
drivers/pinctrl/pinctrl-rockchip.c | 645 +----------------------------
1 file changed, 17 insertions(+), 628 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index b99813379918..ae33e376695f 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -21,8 +21,8 @@
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/gpio/driver.h>
-#include <linux/of_device.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>
@@ -39,20 +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
-
/**
* Generate a bitmask for setting a value (v) with a write mask bit in hiword
* register 31:16 area.
@@ -2071,75 +2057,11 @@ 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;
-
- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
- 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;
-
- 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);
-
- 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,
};
/*
@@ -2170,15 +2092,13 @@ 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;
@@ -2211,10 +2131,13 @@ 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;
@@ -2252,6 +2175,7 @@ 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;
@@ -2280,7 +2204,7 @@ 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;
@@ -2518,7 +2442,7 @@ 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;
@@ -2538,526 +2462,9 @@ 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;
-
- 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);
-}
-
-/*
- * 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;
-
- data = readl(bank->reg_base + GPIO_EXT_PORT);
- 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;
-
- 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);
-}
-
-/*
- * 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;
-
- virq = irq_create_mapping(bank->domain, offset);
-
- 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;
-
- 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);
- 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);
-
- 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;
-
- bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
- irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
-}
-
-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;
-
- irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
-}
-
-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;
-
- 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);
-}
-
-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;
- }
-
- 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);
- 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);
- 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);
- }
-
- 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_enable(bank->clk);
-}
-
static const struct of_device_id rockchip_pinctrl_dt_match[];
/* retrieve the soc specific data */
@@ -3067,7 +2474,6 @@ 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;
@@ -3075,23 +2481,6 @@ 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;
@@ -3312,18 +2701,18 @@ 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
^ permalink raw reply related [flat|nested] 9+ messages in thread