From: Sean Wang <sean.wang@xxxxxxxxxxxx>
Add EINT support to MT7622 SoC and the support is made as just an option
to MT7622 pinctrl.
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
drivers/pinctrl/mediatek/Kconfig | 2 +-
drivers/pinctrl/mediatek/pinctrl-mt7622.c | 143 ++++++++++++++++++++++++++++++
2 files changed, 144 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/mediatek/Kconfig b/drivers/pinctrl/mediatek/Kconfig
index 310db42..9905dc6 100644
--- a/drivers/pinctrl/mediatek/Kconfig
+++ b/drivers/pinctrl/mediatek/Kconfig
@@ -3,7 +3,7 @@ menu "MediaTek pinctrl drivers"
config EINT_MTK
bool "MediaTek External Interrupt Support"
- depends on PINCTRL_MTK || COMPILE_TEST
+ depends on PINCTRL_MTK || PINCTRL_MT7622 || COMPILE_TEST
select IRQ_DOMAIN
config PINCTRL_MTK
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt7622.c b/drivers/pinctrl/mediatek/pinctrl-mt7622.c
index 06e8406..ad6da11 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt7622.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt7622.c
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>
@@ -30,6 +31,7 @@
#include "../core.h"
#include "../pinconf.h"
#include "../pinmux.h"
+#include "mtk-eint.h"
#define PINCTRL_PINCTRL_DEV KBUILD_MODNAME
#define MTK_RANGE(_a) { .range = (_a), .nranges = ARRAY_SIZE(_a), }
@@ -123,6 +125,8 @@ struct mtk_pin_soc {
unsigned int ngrps;
const struct function_desc *funcs;
unsigned int nfuncs;
+ const struct mtk_eint_regs *eint_regs;
+ const struct mtk_eint_hw *eint_hw;
};
struct mtk_pinctrl {
@@ -131,6 +135,7 @@ struct mtk_pinctrl {
struct device *dev;
struct gpio_chip chip;
const struct mtk_pin_soc *soc;
+ struct mtk_eint *eint;
};
static const struct mtk_pin_field_calc mt7622_pin_mode_range[] = {
@@ -913,6 +918,13 @@ static const struct pin_config_item mtk_conf_items[] = {
};
#endif
+static const struct mtk_eint_hw mt7622_eint_hw = {
+ .port_mask = 7,
+ .ports = 7,
+ .ap_num = ARRAY_SIZE(mt7622_pins),
+ .db_cnt = 20,
+};
+
static const struct mtk_pin_soc mt7622_data = {
.reg_cal = mt7622_reg_cals,
.pins = mt7622_pins,
@@ -921,6 +933,7 @@ static const struct mtk_pin_soc mt7622_data = {
.ngrps = ARRAY_SIZE(mt7622_groups),
.funcs = mt7622_functions,
.nfuncs = ARRAY_SIZE(mt7622_functions),
+ .eint_hw = &mt7622_eint_hw,
};
static void mtk_w32(struct mtk_pinctrl *pctl, u32 reg, u32 val)
@@ -1441,6 +1454,32 @@ static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
return pinctrl_gpio_direction_output(chip->base + gpio);
}
+static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ unsigned long eint_n;
+
+ eint_n = offset;
+
+ return mtk_eint_find_irq(hw->eint, eint_n);
+}
+
+static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+ unsigned long config)
+{
+ struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+ unsigned long eint_n;
+ u32 debounce;
+
+ if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+ return -ENOTSUPP;
+
+ debounce = pinconf_to_config_argument(config);
+ eint_n = offset;
+
+ return mtk_eint_set_debounce(hw->eint, eint_n, debounce);
+}
+
static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
{
struct gpio_chip *chip = &hw->chip;
@@ -1454,6 +1493,8 @@ static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np)
chip->direction_output = mtk_gpio_direction_output;
chip->get = mtk_gpio_get;
chip->set = mtk_gpio_set;
+ chip->to_irq = mtk_gpio_to_irq,
+ chip->set_config = mtk_gpio_set_config,
chip->base = -1;
chip->ngpio = hw->soc->npins;
chip->of_node = np;
@@ -1514,6 +1555,103 @@ static int mtk_build_functions(struct mtk_pinctrl *hw)
return 0;
}
+static int mtk_xt_get_gpio_n(void *data, unsigned long eint_n,
+ unsigned int *gpio_n,
+ struct gpio_chip **gpio_chip)
+{
+ struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
+
+ *gpio_chip = &hw->chip;
+ *gpio_n = eint_n;
+
+ return 0;
+}
+
+static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n)
+{
+ struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
+ struct gpio_chip *gpio_chip;
+ unsigned int gpio_n;
+ int err;
+
+ err = mtk_xt_get_gpio_n(hw, eint_n, &gpio_n, &gpio_chip);
+ if (err)
+ return err;
+
+ return mtk_gpio_get(gpio_chip, gpio_n);
+}
+
+static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n)
+{
+ struct mtk_pinctrl *hw = (struct mtk_pinctrl *)data;
+ struct gpio_chip *gpio_chip;
+ unsigned int gpio_n;
+ int err;
+
+ err = mtk_xt_get_gpio_n(hw, eint_n, &gpio_n, &gpio_chip);
+ if (err)
+ return err;
+
+ err = mtk_hw_set_value(hw, gpio_n, PINCTRL_PIN_REG_MODE,
+ MTK_GPIO_MODE);
+ if (err)
+ return err;
+
+ err = mtk_hw_set_value(hw, gpio_n, PINCTRL_PIN_REG_DIR, MTK_INPUT);
+ if (err)
+ return err;
+
+ err = mtk_hw_set_value(hw, gpio_n, PINCTRL_PIN_REG_SMT, MTK_ENABLE);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static const struct mtk_eint_xt mtk_eint_xt = {
+ .get_gpio_n = mtk_xt_get_gpio_n,
+ .get_gpio_state = mtk_xt_get_gpio_state,
+ .set_gpio_as_eint = mtk_xt_set_gpio_as_eint,
+};
+
+static int
+mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+
+ if (!IS_ENABLED(CONFIG_EINT_MTK))
+ return 0;
+
+ if (!of_property_read_bool(np, "interrupt-controller"))
+ return -ENODEV;
+
+ hw->eint = devm_kzalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
+ if (!hw->eint)
+ return -ENOMEM;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eint");
+ if (!res) {
+ dev_err(&pdev->dev, "Unable to get eint resource\n");
+ return -ENODEV;
+ }
+
+ hw->eint->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hw->eint->base))
+ return PTR_ERR(hw->eint->base);
+
+ hw->eint->irq = irq_of_parse_and_map(np, 0);
+ if (!hw->eint->irq)
+ return -EINVAL;
+
+ hw->eint->dev = &pdev->dev;
+ hw->eint->hw = hw->soc->eint_hw;
+ hw->eint->pctl = hw;
+ hw->eint->gpio_xlate = &mtk_eint_xt;
+
+ return mtk_eint_do_init(hw->eint);
+}
+
static const struct of_device_id mtk_pinctrl_of_match[] = {
{ .compatible = "mediatek,mt7622-pinctrl", .data = &mt7622_data},
{ }
@@ -1577,6 +1715,11 @@ static int mtk_pinctrl_probe(struct platform_device *pdev)
return err;
}
+ err = mtk_build_eint(hw, pdev);
+ if (err)
+ dev_warn(&pdev->dev,
+ "Failed to add EINT, but pinctrl still can work\n");
+
platform_set_drvdata(pdev, hw);
return 0;
--
2.7.4
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