[PATCH AUTOSEL 5.15 16/47] gpiolib: of: do not ignore requested index when applying quirks

[PATCH AUTOSEL 5.15 16/47] gpiolib: of: do not ignore requested index when applying quirks

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit 98c3c940ea5c3957056717e8b77a91c7d94536ad ]

We should not ignore index passed into of_find_gpio() when handling
quirks. While in practice this change will not have any effect, it
will allow consolidate quirk handling.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpiolib-of.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 7a96eb626a08..2956df2605e5 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -369,7 +369,9 @@ EXPORT_SYMBOL_GPL(gpiod_get_from_of_node);
  * properties should be named "foo-gpios" so we have this special kludge for
  * them.
  */
-static struct gpio_desc *of_find_spi_gpio(struct device *dev, const char *con_id,
+static struct gpio_desc *of_find_spi_gpio(struct device *dev,
+					  const char *con_id,
+					  unsigned int idx,
 					  enum of_gpio_flags *of_flags)
 {
 	char prop_name[32]; /* 32 is max size of property name */
@@ -390,7 +392,7 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev, const char *con_id
 	/* Will be "gpio-sck", "gpio-mosi" or "gpio-miso" */
 	snprintf(prop_name, sizeof(prop_name), "%s-%s", "gpio", con_id);
 
-	desc = of_get_named_gpiod_flags(np, prop_name, 0, of_flags);
+	desc = of_get_named_gpiod_flags(np, prop_name, idx, of_flags);
 	return desc;
 }
 
@@ -431,7 +433,9 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
  * properties should be named "foo-gpios" so we have this special kludge for
  * them.
  */
-static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char *con_id,
+static struct gpio_desc *of_find_regulator_gpio(struct device *dev,
+						const char *con_id,
+						unsigned int idx,
 						enum of_gpio_flags *of_flags)
 {
 	/* These are the connection IDs we accept as legacy GPIO phandles */
@@ -454,12 +458,13 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char *
 	if (i < 0)
 		return ERR_PTR(-ENOENT);
 
-	desc = of_get_named_gpiod_flags(np, con_id, 0, of_flags);
+	desc = of_get_named_gpiod_flags(np, con_id, idx, of_flags);
 	return desc;
 }
 
 static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
 					      const char *con_id,
+					      unsigned int idx,
 					      enum of_gpio_flags *of_flags)
 {
 	if (!IS_ENABLED(CONFIG_MFD_ARIZONA))
@@ -468,17 +473,18 @@ static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
 	if (!con_id || strcmp(con_id, "wlf,reset"))
 		return ERR_PTR(-ENOENT);
 
-	return of_get_named_gpiod_flags(dev->of_node, con_id, 0, of_flags);
+	return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags);
 }
 
 static struct gpio_desc *of_find_usb_gpio(struct device *dev,
 					  const char *con_id,
+					  unsigned int idx,
 					  enum of_gpio_flags *of_flags)
 {
 	/*
-	 * Currently this USB quirk is only for the Fairchild FUSB302 host which is using
-	 * an undocumented DT GPIO line named "fcs,int_n" without the compulsory "-gpios"
-	 * suffix.
+	 * Currently this USB quirk is only for the Fairchild FUSB302 host
+	 * which is using an undocumented DT GPIO line named "fcs,int_n"
+	 * without the compulsory "-gpios" suffix.
 	 */
 	if (!IS_ENABLED(CONFIG_TYPEC_FUSB302))
 		return ERR_PTR(-ENOENT);
@@ -486,7 +492,7 @@ static struct gpio_desc *of_find_usb_gpio(struct device *dev,
 	if (!con_id || strcmp(con_id, "fcs,int_n"))
 		return ERR_PTR(-ENOENT);
 
-	return of_get_named_gpiod_flags(dev->of_node, con_id, 0, of_flags);
+	return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags);
 }
 
 struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
@@ -515,7 +521,7 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 
 	if (gpiod_not_found(desc)) {
 		/* Special handling for SPI GPIOs if used */
-		desc = of_find_spi_gpio(dev, con_id, &of_flags);
+		desc = of_find_spi_gpio(dev, con_id, idx, &of_flags);
 	}
 
 	if (gpiod_not_found(desc)) {
@@ -527,14 +533,14 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 
 	if (gpiod_not_found(desc)) {
 		/* Special handling for regulator GPIOs if used */
-		desc = of_find_regulator_gpio(dev, con_id, &of_flags);
+		desc = of_find_regulator_gpio(dev, con_id, idx, &of_flags);
 	}
 
 	if (gpiod_not_found(desc))
-		desc = of_find_arizona_gpio(dev, con_id, &of_flags);
+		desc = of_find_arizona_gpio(dev, con_id, idx, &of_flags);
 
 	if (gpiod_not_found(desc))
-		desc = of_find_usb_gpio(dev, con_id, &of_flags);
+		desc = of_find_usb_gpio(dev, con_id, idx, &of_flags);
 
 	if (IS_ERR(desc))
 		return desc;
-- 
2.35.1

[PATCH AUTOSEL 5.15 17/47] gpiolib: of: make Freescale SPI quirk similar to all others

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit 984914ec4f4bfa9ee8f067b06293bc12bef20137 ]

There is no need for of_find_spi_cs_gpio() to be different from other
quirks: the only variant of property actually used in DTS is "gpios"
(plural) so we can use of_get_named_gpiod_flags() instead of recursing
into of_find_gpio() again.

This will allow us consolidate quirk handling down the road.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpiolib-of.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 2956df2605e5..fe34061d918b 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -404,7 +404,7 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev,
 static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
 					     const char *con_id,
 					     unsigned int idx,
-					     unsigned long *flags)
+					     enum of_gpio_flags *of_flags)
 {
 	const struct device_node *np = dev->of_node;
 
@@ -425,7 +425,7 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
 	 * uses just "gpios" so translate to that when "cs-gpios" is
 	 * requested.
 	 */
-	return of_find_gpio(dev, NULL, idx, flags);
+	return of_get_named_gpiod_flags(dev->of_node, "gpios", idx, of_flags);
 }
 
 /*
@@ -524,12 +524,8 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 		desc = of_find_spi_gpio(dev, con_id, idx, &of_flags);
 	}
 
-	if (gpiod_not_found(desc)) {
-		/* This quirk looks up flags and all */
-		desc = of_find_spi_cs_gpio(dev, con_id, idx, flags);
-		if (!IS_ERR(desc))
-			return desc;
-	}
+	if (gpiod_not_found(desc))
+		desc = of_find_spi_cs_gpio(dev, con_id, idx, &of_flags);
 
 	if (gpiod_not_found(desc)) {
 		/* Special handling for regulator GPIOs if used */
-- 
2.35.1

[PATCH AUTOSEL 5.15 18/47] gpiolib: rework quirk handling in of_find_gpio()

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit a2b5e207cade33b4d2dfd920f783f13b1f173e78 ]

Instead of having a string of "if" statements let's put all quirks into
an array and iterate over them.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpiolib-of.c | 62 ++++++++++++++++-----------------------
 1 file changed, 26 insertions(+), 36 deletions(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index fe34061d918b..77fa14776078 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -369,14 +369,12 @@ EXPORT_SYMBOL_GPL(gpiod_get_from_of_node);
  * properties should be named "foo-gpios" so we have this special kludge for
  * them.
  */
-static struct gpio_desc *of_find_spi_gpio(struct device *dev,
+static struct gpio_desc *of_find_spi_gpio(struct device_node *np,
 					  const char *con_id,
 					  unsigned int idx,
 					  enum of_gpio_flags *of_flags)
 {
 	char prop_name[32]; /* 32 is max size of property name */
-	const struct device_node *np = dev->of_node;
-	struct gpio_desc *desc;
 
 	/*
 	 * Hopefully the compiler stubs the rest of the function if this
@@ -392,8 +390,7 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev,
 	/* Will be "gpio-sck", "gpio-mosi" or "gpio-miso" */
 	snprintf(prop_name, sizeof(prop_name), "%s-%s", "gpio", con_id);
 
-	desc = of_get_named_gpiod_flags(np, prop_name, idx, of_flags);
-	return desc;
+	return of_get_named_gpiod_flags(np, prop_name, idx, of_flags);
 }
 
 /*
@@ -401,13 +398,11 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev,
  * lines rather than "cs-gpios" like all other SPI hardware. Account for this
  * with a special quirk.
  */
-static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
+static struct gpio_desc *of_find_spi_cs_gpio(struct device_node *np,
 					     const char *con_id,
 					     unsigned int idx,
 					     enum of_gpio_flags *of_flags)
 {
-	const struct device_node *np = dev->of_node;
-
 	if (!IS_ENABLED(CONFIG_SPI_MASTER))
 		return ERR_PTR(-ENOENT);
 
@@ -425,7 +420,7 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
 	 * uses just "gpios" so translate to that when "cs-gpios" is
 	 * requested.
 	 */
-	return of_get_named_gpiod_flags(dev->of_node, "gpios", idx, of_flags);
+	return of_get_named_gpiod_flags(np, "gpios", idx, of_flags);
 }
 
 /*
@@ -433,7 +428,7 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
  * properties should be named "foo-gpios" so we have this special kludge for
  * them.
  */
-static struct gpio_desc *of_find_regulator_gpio(struct device *dev,
+static struct gpio_desc *of_find_regulator_gpio(struct device_node *np,
 						const char *con_id,
 						unsigned int idx,
 						enum of_gpio_flags *of_flags)
@@ -444,8 +439,6 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev,
 		"wlf,ldo1ena", /* WM8994 */
 		"wlf,ldo2ena", /* WM8994 */
 	};
-	const struct device_node *np = dev->of_node;
-	struct gpio_desc *desc;
 	int i;
 
 	if (!IS_ENABLED(CONFIG_REGULATOR))
@@ -458,11 +451,10 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev,
 	if (i < 0)
 		return ERR_PTR(-ENOENT);
 
-	desc = of_get_named_gpiod_flags(np, con_id, idx, of_flags);
-	return desc;
+	return of_get_named_gpiod_flags(np, con_id, idx, of_flags);
 }
 
-static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
+static struct gpio_desc *of_find_arizona_gpio(struct device_node *np,
 					      const char *con_id,
 					      unsigned int idx,
 					      enum of_gpio_flags *of_flags)
@@ -473,10 +465,10 @@ static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
 	if (!con_id || strcmp(con_id, "wlf,reset"))
 		return ERR_PTR(-ENOENT);
 
-	return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags);
+	return of_get_named_gpiod_flags(np, con_id, idx, of_flags);
 }
 
-static struct gpio_desc *of_find_usb_gpio(struct device *dev,
+static struct gpio_desc *of_find_usb_gpio(struct device_node *np,
 					  const char *con_id,
 					  unsigned int idx,
 					  enum of_gpio_flags *of_flags)
@@ -492,14 +484,27 @@ static struct gpio_desc *of_find_usb_gpio(struct device *dev,
 	if (!con_id || strcmp(con_id, "fcs,int_n"))
 		return ERR_PTR(-ENOENT);
 
-	return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags);
+	return of_get_named_gpiod_flags(np, con_id, idx, of_flags);
 }
 
+typedef struct gpio_desc *(*of_find_gpio_quirk)(struct device_node *np,
+						const char *con_id,
+						unsigned int idx,
+						enum of_gpio_flags *of_flags);
+static const of_find_gpio_quirk of_find_gpio_quirks[] = {
+	of_find_spi_gpio,
+	of_find_spi_cs_gpio,
+	of_find_regulator_gpio,
+	of_find_arizona_gpio,
+	of_find_usb_gpio,
+};
+
 struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 			       unsigned int idx, unsigned long *flags)
 {
 	char prop_name[32]; /* 32 is max size of property name */
 	enum of_gpio_flags of_flags;
+	const of_find_gpio_quirk *q;
 	struct gpio_desc *desc;
 	unsigned int i;
 
@@ -519,24 +524,9 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
 			break;
 	}
 
-	if (gpiod_not_found(desc)) {
-		/* Special handling for SPI GPIOs if used */
-		desc = of_find_spi_gpio(dev, con_id, idx, &of_flags);
-	}
-
-	if (gpiod_not_found(desc))
-		desc = of_find_spi_cs_gpio(dev, con_id, idx, &of_flags);
-
-	if (gpiod_not_found(desc)) {
-		/* Special handling for regulator GPIOs if used */
-		desc = of_find_regulator_gpio(dev, con_id, idx, &of_flags);
-	}
-
-	if (gpiod_not_found(desc))
-		desc = of_find_arizona_gpio(dev, con_id, idx, &of_flags);
-
-	if (gpiod_not_found(desc))
-		desc = of_find_usb_gpio(dev, con_id, idx, &of_flags);
+	/* Properly named GPIO was not found, try workarounds */
+	for (q = of_find_gpio_quirks; gpiod_not_found(desc) && *q; q++)
+		desc = (*q)(dev->of_node, con_id, idx, &of_flags);
 
 	if (IS_ERR(desc))
 		return desc;
-- 
2.35.1