[PATCH v1 0/4] gpiolib: acpi: Use con_id in acpi_dev_gpio_irq_get_by()

[PATCH v1 0/4] gpiolib: acpi: Use con_id in acpi_dev_gpio_irq_get_by()

[Andy Shevchenko]

Use con_id instead of property in the acpi_dev_gpio_irq_get_by().
It will be aligned with other GPIO library functions.

Assumed to go via my GPIO ACPI library tree follwoed by GPIO subsystem.

Andy Shevchenko (4):
  gpiolib: acpi: Extract __acpi_find_gpio() helper
  gpiolib: acpi: Simplify error handling in __acpi_find_gpio()
  gpiolib: acpi: Move acpi_can_fallback_to_crs() out of
    __acpi_find_gpio()
  gpiolib: acpi: Pass con_id instead of property into
    acpi_dev_gpio_irq_get_by()

 drivers/gpio/gpio-pca953x.c                   |  2 +-
 drivers/gpio/gpiolib-acpi.c                   | 52 +++++++++++--------
 .../mellanox/mlxbf_gige/mlxbf_gige_main.c     |  2 +-
 drivers/pinctrl/pinctrl-cy8c95x0.c            |  2 +-
 include/linux/acpi.h                          |  8 +--
 5 files changed, 37 insertions(+), 29 deletions(-)

-- 
2.43.0.rc1.1336.g36b5255a03ac

[PATCH v1 1/4] gpiolib: acpi: Extract __acpi_find_gpio() helper

[Andy Shevchenko]

We want to reuse it later on in the code. In particular, it helps
to clean up the users of acpi_dev_gpio_irq_wake_get_by().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-acpi.c | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index c2a33beeec50..d47b22ac3ecb 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -945,14 +945,11 @@ static bool acpi_can_fallback_to_crs(struct acpi_device *adev,
 	return con_id == NULL;
 }
 
-struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
-				 const char *con_id,
-				 unsigned int idx,
-				 enum gpiod_flags *dflags,
-				 unsigned long *lookupflags)
+static struct gpio_desc *
+__acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int idx,
+		 struct acpi_gpio_info *info)
 {
 	struct acpi_device *adev = to_acpi_device_node(fwnode);
-	struct acpi_gpio_info info;
 	struct gpio_desc *desc;
 	char propname[32];
 	int i;
@@ -969,10 +966,10 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 
 		if (adev)
 			desc = acpi_get_gpiod_by_index(adev,
-						       propname, idx, &info);
+						       propname, idx, info);
 		else
 			desc = acpi_get_gpiod_from_data(fwnode,
-						        propname, idx, &info);
+							propname, idx, info);
 		if (PTR_ERR(desc) == -EPROBE_DEFER)
 			return ERR_CAST(desc);
 
@@ -985,11 +982,28 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 		if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
 			return ERR_PTR(-ENOENT);
 
-		desc = acpi_get_gpiod_by_index(adev, NULL, idx, &info);
+		desc = acpi_get_gpiod_by_index(adev, NULL, idx, info);
 		if (IS_ERR(desc))
 			return desc;
 	}
 
+	return desc;
+}
+
+struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
+				 const char *con_id,
+				 unsigned int idx,
+				 enum gpiod_flags *dflags,
+				 unsigned long *lookupflags)
+{
+	struct acpi_device *adev = to_acpi_device_node(fwnode);
+	struct acpi_gpio_info info;
+	struct gpio_desc *desc;
+
+	desc = __acpi_find_gpio(fwnode, con_id, idx, &info);
+	if (IS_ERR(desc))
+		return desc;
+
 	if (info.gpioint &&
 	    (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) {
 		dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n");
-- 
2.43.0.rc1.1336.g36b5255a03ac

[PATCH v1 2/4] gpiolib: acpi: Simplify error handling in __acpi_find_gpio()

[Andy Shevchenko]

Now that we don't perform anything on the GPIO descriptor,
we may simplify the error path in newly introduced helper.
Do it so.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-acpi.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index d47b22ac3ecb..fb2e14670b7a 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -974,20 +974,14 @@ __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int
 			return ERR_CAST(desc);
 
 		if (!IS_ERR(desc))
-			break;
-	}
-
-	/* Then from plain _CRS GPIOs */
-	if (IS_ERR(desc)) {
-		if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
-			return ERR_PTR(-ENOENT);
-
-		desc = acpi_get_gpiod_by_index(adev, NULL, idx, info);
-		if (IS_ERR(desc))
 			return desc;
 	}
 
-	return desc;
+	/* Then from plain _CRS GPIOs */
+	if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
+		return ERR_PTR(-ENOENT);
+
+	return acpi_get_gpiod_by_index(adev, NULL, idx, info);
 }
 
 struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
-- 
2.43.0.rc1.1336.g36b5255a03ac

[PATCH v1 3/4] gpiolib: acpi: Move acpi_can_fallback_to_crs() out of __acpi_find_gpio()

[Andy Shevchenko]

New coming user may need to check for _CRS fallback slightly differently.
Move the current check out of the helper function to allow that user to
use it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpiolib-acpi.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index fb2e14670b7a..2b3fd43b13fc 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -947,7 +947,7 @@ static bool acpi_can_fallback_to_crs(struct acpi_device *adev,
 
 static struct gpio_desc *
 __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int idx,
-		 struct acpi_gpio_info *info)
+		 bool can_fallback, struct acpi_gpio_info *info)
 {
 	struct acpi_device *adev = to_acpi_device_node(fwnode);
 	struct gpio_desc *desc;
@@ -978,7 +978,7 @@ __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int
 	}
 
 	/* Then from plain _CRS GPIOs */
-	if (!adev || !acpi_can_fallback_to_crs(adev, con_id))
+	if (!adev || !can_fallback)
 		return ERR_PTR(-ENOENT);
 
 	return acpi_get_gpiod_by_index(adev, NULL, idx, info);
@@ -991,10 +991,11 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 				 unsigned long *lookupflags)
 {
 	struct acpi_device *adev = to_acpi_device_node(fwnode);
+	bool can_fallback = acpi_can_fallback_to_crs(adev, con_id);
 	struct acpi_gpio_info info;
 	struct gpio_desc *desc;
 
-	desc = __acpi_find_gpio(fwnode, con_id, idx, &info);
+	desc = __acpi_find_gpio(fwnode, con_id, idx, can_fallback, &info);
 	if (IS_ERR(desc))
 		return desc;
 
-- 
2.43.0.rc1.1336.g36b5255a03ac

[PATCH v1 4/4] gpiolib: acpi: Pass con_id instead of property into acpi_dev_gpio_irq_get_by()

[Andy Shevchenko]

Pass the con_id instead of property so that callers won't repeat
the GPIO suffixes to try.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpio/gpio-pca953x.c                           |  2 +-
 drivers/gpio/gpiolib-acpi.c                           | 11 +++++------
 .../ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c    |  2 +-
 drivers/pinctrl/pinctrl-cy8c95x0.c                    |  2 +-
 include/linux/acpi.h                                  |  8 ++++----
 5 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 00ffa168e405..77a2812f2974 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -144,7 +144,7 @@ static int pca953x_acpi_get_irq(struct device *dev)
 	if (ret)
 		dev_warn(dev, "can't add GPIO ACPI mapping\n");
 
-	ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
+	ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq", 0);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 2b3fd43b13fc..909113312a1b 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1013,7 +1013,7 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 /**
  * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number
  * @adev: pointer to a ACPI device to get IRQ from
- * @name: optional name of GpioInt resource
+ * @con_id: optional name of GpioInt resource
  * @index: index of GpioInt resource (starting from %0)
  * @wake_capable: Set to true if the IRQ is wake capable
  *
@@ -1024,15 +1024,15 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
  * The function is idempotent, though each time it runs it will configure GPIO
  * pin direction according to the flags in GpioInt resource.
  *
- * The function takes optional @name parameter. If the resource has a property
- * name, then only those will be taken into account.
+ * The function takes optional @con_id parameter. If the resource has
+ * a @con_id in a property, then only those will be taken into account.
  *
  * The GPIO is considered wake capable if the GpioInt resource specifies
  * SharedAndWake or ExclusiveAndWake.
  *
  * Return: Linux IRQ number (> %0) on success, negative errno on failure.
  */
-int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index,
+int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id, int index,
 				  bool *wake_capable)
 {
 	int idx, i;
@@ -1043,9 +1043,8 @@ int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, in
 		struct acpi_gpio_info info;
 		struct gpio_desc *desc;
 
-		desc = acpi_get_gpiod_by_index(adev, name, i, &info);
-
 		/* Ignore -EPROBE_DEFER, it only matters if idx matches */
+		desc = __acpi_find_gpio(acpi_fwnode_handle(adev), con_id, i, true, &info);
 		if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
 			return PTR_ERR(desc);
 
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
index ba303868686a..b157f0f1c5a8 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
@@ -436,7 +436,7 @@ static int mlxbf_gige_probe(struct platform_device *pdev)
 	priv->rx_irq = platform_get_irq(pdev, MLXBF_GIGE_RECEIVE_PKT_INTR_IDX);
 	priv->llu_plu_irq = platform_get_irq(pdev, MLXBF_GIGE_LLU_PLU_INTR_IDX);
 
-	phy_irq = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(&pdev->dev), "phy-gpios", 0);
+	phy_irq = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(&pdev->dev), "phy", 0);
 	if (phy_irq < 0) {
 		dev_err(&pdev->dev, "Error getting PHY irq. Use polling instead");
 		phy_irq = PHY_POLL;
diff --git a/drivers/pinctrl/pinctrl-cy8c95x0.c b/drivers/pinctrl/pinctrl-cy8c95x0.c
index 67b5d160c027..981c569bd671 100644
--- a/drivers/pinctrl/pinctrl-cy8c95x0.c
+++ b/drivers/pinctrl/pinctrl-cy8c95x0.c
@@ -95,7 +95,7 @@ static int cy8c95x0_acpi_get_irq(struct device *dev)
 	if (ret)
 		dev_warn(dev, "can't add GPIO ACPI mapping\n");
 
-	ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
+	ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq", 0);
 	if (ret < 0)
 		return ret;
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 34829f2c517a..35aff121f418 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1233,7 +1233,7 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
 				struct acpi_resource_gpio **agpio);
 bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
 			       struct acpi_resource_gpio **agpio);
-int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index,
+int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id, int index,
 				  bool *wake_capable);
 #else
 static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
@@ -1246,7 +1246,7 @@ static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares,
 {
 	return false;
 }
-static inline int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name,
+static inline int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id,
 						int index, bool *wake_capable)
 {
 	return -ENXIO;
@@ -1259,10 +1259,10 @@ static inline int acpi_dev_gpio_irq_wake_get(struct acpi_device *adev, int index
 	return acpi_dev_gpio_irq_wake_get_by(adev, NULL, index, wake_capable);
 }
 
-static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name,
+static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *con_id,
 					   int index)
 {
-	return acpi_dev_gpio_irq_wake_get_by(adev, name, index, NULL);
+	return acpi_dev_gpio_irq_wake_get_by(adev, con_id, index, NULL);
 }
 
 static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
-- 
2.43.0.rc1.1336.g36b5255a03ac

Re: [PATCH v1 0/4] gpiolib: acpi: Use con_id in acpi_dev_gpio_irq_get_by()

[Mika Westerberg]

On Thu, Apr 11, 2024 at 08:22:28PM +0300, Andy Shevchenko wrote:
> Use con_id instead of property in the acpi_dev_gpio_irq_get_by().
> It will be aligned with other GPIO library functions.
> 
> Assumed to go via my GPIO ACPI library tree follwoed by GPIO subsystem.
> 
> Andy Shevchenko (4):
>   gpiolib: acpi: Extract __acpi_find_gpio() helper
>   gpiolib: acpi: Simplify error handling in __acpi_find_gpio()
>   gpiolib: acpi: Move acpi_can_fallback_to_crs() out of
>     __acpi_find_gpio()
>   gpiolib: acpi: Pass con_id instead of property into
>     acpi_dev_gpio_irq_get_by()
> 
>  drivers/gpio/gpio-pca953x.c                   |  2 +-
>  drivers/gpio/gpiolib-acpi.c                   | 52 +++++++++++--------

For the gpiolib-acpi.c parts,

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

Re: [PATCH v1 0/4] gpiolib: acpi: Use con_id in acpi_dev_gpio_irq_get_by()

[Andy Shevchenko]

On Fri, Apr 12, 2024 at 01:19:44PM +0300, Mika Westerberg wrote:
> On Thu, Apr 11, 2024 at 08:22:28PM +0300, Andy Shevchenko wrote:
> > Use con_id instead of property in the acpi_dev_gpio_irq_get_by().
> > It will be aligned with other GPIO library functions.
> > 
> > Assumed to go via my GPIO ACPI library tree follwoed by GPIO subsystem.
> > 
> > Andy Shevchenko (4):
> >   gpiolib: acpi: Extract __acpi_find_gpio() helper
> >   gpiolib: acpi: Simplify error handling in __acpi_find_gpio()
> >   gpiolib: acpi: Move acpi_can_fallback_to_crs() out of
> >     __acpi_find_gpio()
> >   gpiolib: acpi: Pass con_id instead of property into
> >     acpi_dev_gpio_irq_get_by()
> > 
> >  drivers/gpio/gpio-pca953x.c                   |  2 +-
> >  drivers/gpio/gpiolib-acpi.c                   | 52 +++++++++++--------
> 
> For the gpiolib-acpi.c parts,
> 
> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

Pushed to my review and testing queue, thanks!

Note, I'll will wait for Acks for Mellanox and ACPI code
for a while, the series will appear in Linux Next for the
testing purposes, but if anybody objects, please let me
know.

-- 
With Best Regards,
Andy Shevchenko