linux-kernel - [PATCH v3 51/73] pinctrl: change the signature of gpio_to

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Message-Id: <20231017120431.68847-52-brgl@bgdev.pl>
Date:   Tue, 17 Oct 2023 14:04:09 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v3 51/73] pinctrl: change the signature of gpio_to_pin()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Modify gpio_to_pin() to be in line with public GPIO helpers and take
a pair of GPIO chip & offset as arguments.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/core.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index ec78a75a5d7c..da5d716f154d 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -269,7 +269,8 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
 /**
  * gpio_to_pin() - GPIO range GPIO number to pin number translation
  * @range: GPIO range used for the translation
- * @gpio: gpio pin to translate to a pin number
+ * @gc: GPIO chip structure from the GPIO subsystem
+ * @offset: hardware offset of the GPIO relative to the controller
  *
  * Finds the pin number for a given GPIO using the specified GPIO range
  * as a base for translation. The distinction between linear GPIO ranges
@@ -280,13 +281,13 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev,
  * result of successful pinctrl_get_device_gpio_range calls)!
  */
 static inline int gpio_to_pin(struct pinctrl_gpio_range *range,
-				unsigned int gpio)
+			      struct gpio_chip *gc, unsigned int offset)
 {
-	unsigned int offset = gpio - range->base;
+	unsigned int pin = gc->base + offset - range->base;
 	if (range->pins)
-		return range->pins[offset];
+		return range->pins[pin];
 	else
-		return range->pin_base + offset;
+		return range->pin_base + pin;
 }
 
 /**
@@ -777,7 +778,7 @@ bool pinctrl_gpio_can_use_line(struct gpio_chip *gc, unsigned int offset)
 	mutex_lock(&pctldev->mutex);
 
 	/* Convert to the pin controllers number space */
-	pin = gpio_to_pin(range, gc->base + offset);
+	pin = gpio_to_pin(range, gc, offset);
 
 	result = pinmux_can_be_used_for_gpio(pctldev, pin);
 
@@ -812,7 +813,7 @@ int pinctrl_gpio_request(struct gpio_chip *gc, unsigned int offset)
 	mutex_lock(&pctldev->mutex);
 
 	/* Convert to the pin controllers number space */
-	pin = gpio_to_pin(range, gc->base + offset);
+	pin = gpio_to_pin(range, gc, offset);
 
 	ret = pinmux_request_gpio(pctldev, range, pin, gc->base + offset);
 
@@ -844,7 +845,7 @@ void pinctrl_gpio_free(struct gpio_chip *gc, unsigned int offset)
 	mutex_lock(&pctldev->mutex);
 
 	/* Convert to the pin controllers number space */
-	pin = gpio_to_pin(range, gc->base + offset);
+	pin = gpio_to_pin(range, gc, offset);
 
 	pinmux_free_gpio(pctldev, pin, range);
 
@@ -868,7 +869,7 @@ static int pinctrl_gpio_direction(struct gpio_chip *gc, unsigned int offset,
 	mutex_lock(&pctldev->mutex);
 
 	/* Convert to the pin controllers number space */
-	pin = gpio_to_pin(range, gc->base + offset);
+	pin = gpio_to_pin(range, gc, offset);
 	ret = pinmux_gpio_direction(pctldev, range, pin, input);
 
 	mutex_unlock(&pctldev->mutex);
@@ -929,7 +930,7 @@ int pinctrl_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 		return ret;
 
 	mutex_lock(&pctldev->mutex);
-	pin = gpio_to_pin(range, gc->base + offset);
+	pin = gpio_to_pin(range, gc, offset);
 	ret = pinconf_set_config(pctldev, pin, configs, ARRAY_SIZE(configs));
 	mutex_unlock(&pctldev->mutex);
 
-- 
2.39.2