lkml.org 
[lkml]   [2020]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] add amlogic gpio to irq
Date
From: Lin shenghuan <linsheng_111@163.com>

---
drivers/pinctrl/meson/pinctrl-meson.c | 36 +++++++++++++++++++++++++++++++++++
drivers/pinctrl/meson/pinctrl-meson.h | 1 +
2 files changed, 37 insertions(+)

diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
index 20683cd..b91ff2c 100644
--- a/drivers/pinctrl/meson/pinctrl-meson.c
+++ b/drivers/pinctrl/meson/pinctrl-meson.c
@@ -51,6 +51,7 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/seq_file.h>
+#include <linux/of_irq.h>

#include "../core.h"
#include "../pinctrl-utils.h"
@@ -598,6 +599,34 @@ static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio)
return !!(val & BIT(bit));
}

+static int meson_gpio_to_irq(struct gpio_chip *chip, unsigned int gpio)
+{
+ struct meson_pinctrl *pc = gpiochip_get_data(chip);
+ struct meson_bank *bank;
+ struct irq_fwspec fwspec;
+ int hwirq;
+
+ if (meson_get_bank(pc, gpio, &bank))
+ return -EINVAL;
+
+ if (bank->irq_first < 0) {
+ dev_warn(pc->dev, "no support irq for pin[%d]\n", gpio);
+ return -EINVAL;
+ }
+ if (!pc->of_irq) {
+ dev_err(pc->dev, "invalid device node of gpio INTC\n");
+ return -EINVAL;
+ }
+
+ hwirq = gpio - bank->first + bank->irq_first;
+ fwspec.fwnode = of_node_to_fwnode(pc->of_irq);
+ fwspec.param_count = 2;
+ fwspec.param[0] = hwirq;
+ fwspec.param[1] = IRQ_TYPE_NONE;
+
+ return irq_create_fwspec_mapping(&fwspec);
+}
+
static int meson_gpiolib_register(struct meson_pinctrl *pc)
{
int ret;
@@ -612,6 +641,7 @@ static int meson_gpiolib_register(struct meson_pinctrl *pc)
pc->chip.direction_output = meson_gpio_direction_output;
pc->chip.get = meson_gpio_get;
pc->chip.set = meson_gpio_set;
+ pc->chip.to_irq = meson_gpio_to_irq;
pc->chip.base = -1;
pc->chip.ngpio = pc->data->num_pins;
pc->chip.can_sleep = false;
@@ -682,6 +712,12 @@ static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,

pc->of_node = gpio_np;

+ pc->of_irq = of_find_compatible_node(NULL,
+ NULL, "amlogic,meson-gpio-intc");
+ if (!pc->of_irq)
+ pc->of_irq = of_find_compatible_node(NULL,
+ NULL, "amlogic,meson-gpio-intc-ext");
+
pc->reg_mux = meson_map_resource(pc, gpio_np, "mux");
if (IS_ERR_OR_NULL(pc->reg_mux)) {
dev_err(pc->dev, "mux registers not found\n");
diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h
index f8b0ff9..0f808bb 100644
--- a/drivers/pinctrl/meson/pinctrl-meson.h
+++ b/drivers/pinctrl/meson/pinctrl-meson.h
@@ -131,6 +131,7 @@ struct meson_pinctrl {
struct regmap *reg_ds;
struct gpio_chip chip;
struct device_node *of_node;
+ struct device_node *of_irq;
};

#define FUNCTION(fn) \
--
2.7.4

\
 
 \ /
  Last update: 2020-11-27 06:24    [W:0.050 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site