[PATCH V2 1/2] pinctrl: utils : add support to pass config type in generic util APIs

[PATCH V2 1/2] pinctrl: utils : add support to pass config type in generic util APIs

[Laxman Dewangan]

Add support to pass the config type like GROUP or PIN when using
the utils or generic pin configuration APIs. This will make the
APIs more generic.

Added additional inline APIs such that it can be use directly as
callback for the pinctrl_ops.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
Changes from V1:
- Remove separate implementation for pins and group for
  pinctrl_utils_dt_free_map and improve this function
  to support both i.e. PINS and GROUPs.

 drivers/pinctrl/pinconf-generic.c       |    9 +++++----
 drivers/pinctrl/pinctrl-palmas.c        |    2 +-
 drivers/pinctrl/pinctrl-utils.c         |   12 +++++++++---
 include/linux/pinctrl/pinconf-generic.h |   22 ++++++++++++++++++++--
 4 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index d9536ca..2c62225 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -240,7 +240,8 @@ out:
 
 int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 		struct device_node *np, struct pinctrl_map **map,
-		unsigned *reserved_maps, unsigned *num_maps)
+		unsigned *reserved_maps, unsigned *num_maps,
+		enum pinctrl_map_type type)
 {
 	int ret;
 	const char *function;
@@ -295,7 +296,7 @@ int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 		if (num_configs) {
 			ret = pinctrl_utils_add_map_configs(pctldev, map,
 					reserved_maps, num_maps, group, configs,
-					num_configs, PIN_MAP_TYPE_CONFIGS_PIN);
+					num_configs, type);
 			if (ret < 0)
 				goto exit;
 		}
@@ -310,7 +311,7 @@ EXPORT_SYMBOL_GPL(pinconf_generic_dt_subnode_to_map);
 
 int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev,
 		struct device_node *np_config, struct pinctrl_map **map,
-		unsigned *num_maps)
+		unsigned *num_maps, enum pinctrl_map_type type)
 {
 	unsigned reserved_maps;
 	struct device_node *np;
@@ -322,7 +323,7 @@ int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev,
 
 	for_each_child_of_node(np_config, np) {
 		ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
-						&reserved_maps, num_maps);
+					&reserved_maps, num_maps, type);
 		if (ret < 0) {
 			pinctrl_utils_dt_free_map(pctldev, *map, *num_maps);
 			return ret;
diff --git a/drivers/pinctrl/pinctrl-palmas.c b/drivers/pinctrl/pinctrl-palmas.c
index 2697c2e..9550c33 100644
--- a/drivers/pinctrl/pinctrl-palmas.c
+++ b/drivers/pinctrl/pinctrl-palmas.c
@@ -655,7 +655,7 @@ static const struct pinctrl_ops palmas_pinctrl_ops = {
 	.get_groups_count = palmas_pinctrl_get_groups_count,
 	.get_group_name = palmas_pinctrl_get_group_name,
 	.get_group_pins = palmas_pinctrl_get_group_pins,
-	.dt_node_to_map = pinconf_generic_dt_node_to_map,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
 	.dt_free_map = pinctrl_utils_dt_free_map,
 };
 
diff --git a/drivers/pinctrl/pinctrl-utils.c b/drivers/pinctrl/pinctrl-utils.c
index b7ac646..48277e0 100644
--- a/drivers/pinctrl/pinctrl-utils.c
+++ b/drivers/pinctrl/pinctrl-utils.c
@@ -126,10 +126,16 @@ void pinctrl_utils_dt_free_map(struct pinctrl_dev *pctldev,
 {
 	int i;
 
-	for (i = 0; i < num_maps; i++)
-		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
+	for (i = 0; i < num_maps; i++) {
+		switch (map[i].type) {
+		case PIN_MAP_TYPE_CONFIGS_GROUP:
+		case PIN_MAP_TYPE_CONFIGS_PIN:
 			kfree(map[i].data.configs.configs);
-
+			break;
+		default:
+			break;
+		}
+	}
 	kfree(map);
 }
 EXPORT_SYMBOL_GPL(pinctrl_utils_dt_free_map);
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index 83f5179..fb90ef5 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -140,15 +140,33 @@ static inline unsigned long pinconf_to_config_packed(enum pin_config_param param
 #ifdef CONFIG_OF
 
 #include <linux/device.h>
+#include <linux/pinctrl/machine.h>
 struct pinctrl_dev;
 struct pinctrl_map;
 
 int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 		struct device_node *np, struct pinctrl_map **map,
-		unsigned *reserved_maps, unsigned *num_maps);
+		unsigned *reserved_maps, unsigned *num_maps,
+		enum pinctrl_map_type type);
 int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev,
 		struct device_node *np_config, struct pinctrl_map **map,
-		unsigned *num_maps);
+		unsigned *num_maps, enum pinctrl_map_type type);
+
+static inline int pinconf_generic_dt_node_to_map_group(
+		struct pinctrl_dev *pctldev, struct device_node *np_config,
+		struct pinctrl_map **map, unsigned *num_maps)
+{
+	return pinconf_generic_dt_node_to_map(pctldev, np_config, map, num_maps,
+			PIN_MAP_TYPE_CONFIGS_GROUP);
+}
+
+static inline int pinconf_generic_dt_node_to_map_pin(
+		struct pinctrl_dev *pctldev, struct device_node *np_config,
+		struct pinctrl_map **map, unsigned *num_maps)
+{
+	return pinconf_generic_dt_node_to_map(pctldev, np_config, map, num_maps,
+			PIN_MAP_TYPE_CONFIGS_PIN);
+}
 
 #endif
 
-- 
1.7.1.1

[PATCH V2 2/2] pinctrl: tegra: use pinctrl-utils APIs for mapping

[Laxman Dewangan]

Pin control utility functions provides the function for creating
map lists.

In place of implementing APIs locally in Tegra pin control driver
for creating map lists, use the utility functions. This reduces
the code size and avoid duplication.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
---
Changes from V1:
- Rebased change on top of V1.
- Use pinctrl_utils_dt_free_map

 drivers/pinctrl/pinctrl-tegra.c |  130 ++++++---------------------------------
 1 files changed, 18 insertions(+), 112 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-tegra.c b/drivers/pinctrl/pinctrl-tegra.c
index 2fa9bc6..637bcd3 100644
--- a/drivers/pinctrl/pinctrl-tegra.c
+++ b/drivers/pinctrl/pinctrl-tegra.c
@@ -32,6 +32,7 @@
 
 #include "core.h"
 #include "pinctrl-tegra.h"
+#include "pinctrl-utils.h"
 
 struct tegra_pmx {
 	struct device *dev;
@@ -90,107 +91,6 @@ static void tegra_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
 }
 #endif
 
-static int reserve_map(struct device *dev, struct pinctrl_map **map,
-		       unsigned *reserved_maps, unsigned *num_maps,
-		       unsigned reserve)
-{
-	unsigned old_num = *reserved_maps;
-	unsigned new_num = *num_maps + reserve;
-	struct pinctrl_map *new_map;
-
-	if (old_num >= new_num)
-		return 0;
-
-	new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
-	if (!new_map) {
-		dev_err(dev, "krealloc(map) failed\n");
-		return -ENOMEM;
-	}
-
-	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
-
-	*map = new_map;
-	*reserved_maps = new_num;
-
-	return 0;
-}
-
-static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
-		       unsigned *num_maps, const char *group,
-		       const char *function)
-{
-	if (WARN_ON(*num_maps == *reserved_maps))
-		return -ENOSPC;
-
-	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
-	(*map)[*num_maps].data.mux.group = group;
-	(*map)[*num_maps].data.mux.function = function;
-	(*num_maps)++;
-
-	return 0;
-}
-
-static int add_map_configs(struct device *dev, struct pinctrl_map **map,
-			   unsigned *reserved_maps, unsigned *num_maps,
-			   const char *group, unsigned long *configs,
-			   unsigned num_configs)
-{
-	unsigned long *dup_configs;
-
-	if (WARN_ON(*num_maps == *reserved_maps))
-		return -ENOSPC;
-
-	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
-			      GFP_KERNEL);
-	if (!dup_configs) {
-		dev_err(dev, "kmemdup(configs) failed\n");
-		return -ENOMEM;
-	}
-
-	(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
-	(*map)[*num_maps].data.configs.group_or_pin = group;
-	(*map)[*num_maps].data.configs.configs = dup_configs;
-	(*map)[*num_maps].data.configs.num_configs = num_configs;
-	(*num_maps)++;
-
-	return 0;
-}
-
-static int add_config(struct device *dev, unsigned long **configs,
-		      unsigned *num_configs, unsigned long config)
-{
-	unsigned old_num = *num_configs;
-	unsigned new_num = old_num + 1;
-	unsigned long *new_configs;
-
-	new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
-			       GFP_KERNEL);
-	if (!new_configs) {
-		dev_err(dev, "krealloc(configs) failed\n");
-		return -ENOMEM;
-	}
-
-	new_configs[old_num] = config;
-
-	*configs = new_configs;
-	*num_configs = new_num;
-
-	return 0;
-}
-
-static void tegra_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
-				      struct pinctrl_map *map,
-				      unsigned num_maps)
-{
-	int i;
-
-	for (i = 0; i < num_maps; i++)
-		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
-			kfree(map[i].data.configs.configs);
-
-	kfree(map);
-}
-
 static const struct cfg_param {
 	const char *property;
 	enum tegra_pinconf_param param;
@@ -212,12 +112,13 @@ static const struct cfg_param {
 	{"nvidia,drive-type",		TEGRA_PINCONF_PARAM_DRIVE_TYPE},
 };
 
-static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
+static int tegra_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 					   struct device_node *np,
 					   struct pinctrl_map **map,
 					   unsigned *reserved_maps,
 					   unsigned *num_maps)
 {
+	struct device *dev = pctldev->dev;
 	int ret, i;
 	const char *function;
 	u32 val;
@@ -241,7 +142,8 @@ static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
 		ret = of_property_read_u32(np, cfg_params[i].property, &val);
 		if (!ret) {
 			config = TEGRA_PINCONF_PACK(cfg_params[i].param, val);
-			ret = add_config(dev, &configs, &num_configs, config);
+			ret = pinctrl_utils_add_config(pctldev, &configs,
+					&num_configs, config);
 			if (ret < 0)
 				goto exit;
 		/* EINVAL=missing, which is fine since it's optional */
@@ -263,22 +165,25 @@ static int tegra_pinctrl_dt_subnode_to_map(struct device *dev,
 	}
 	reserve *= ret;
 
-	ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
+	ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
+					num_maps, reserve);
 	if (ret < 0)
 		goto exit;
 
 	of_property_for_each_string(np, "nvidia,pins", prop, group) {
 		if (function) {
-			ret = add_map_mux(map, reserved_maps, num_maps,
-					  group, function);
+			ret = pinctrl_utils_add_map_mux(pctldev, map,
+					reserved_maps, num_maps, group,
+					function);
 			if (ret < 0)
 				goto exit;
 		}
 
 		if (num_configs) {
-			ret = add_map_configs(dev, map, reserved_maps,
-					      num_maps, group, configs,
-					      num_configs);
+			ret = pinctrl_utils_add_map_configs(pctldev, map,
+					reserved_maps, num_maps, group,
+					configs, num_configs,
+					PIN_MAP_TYPE_CONFIGS_GROUP);
 			if (ret < 0)
 				goto exit;
 		}
@@ -305,10 +210,11 @@ static int tegra_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 	*num_maps = 0;
 
 	for_each_child_of_node(np_config, np) {
-		ret = tegra_pinctrl_dt_subnode_to_map(pctldev->dev, np, map,
+		ret = tegra_pinctrl_dt_subnode_to_map(pctldev, np, map,
 						      &reserved_maps, num_maps);
 		if (ret < 0) {
-			tegra_pinctrl_dt_free_map(pctldev, *map, *num_maps);
+			pinctrl_utils_dt_free_map(pctldev, *map,
+				*num_maps);
 			return ret;
 		}
 	}
@@ -324,7 +230,7 @@ static const struct pinctrl_ops tegra_pinctrl_ops = {
 	.pin_dbg_show = tegra_pinctrl_pin_dbg_show,
 #endif
 	.dt_node_to_map = tegra_pinctrl_dt_node_to_map,
-	.dt_free_map = tegra_pinctrl_dt_free_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
 };
 
 static int tegra_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
-- 
1.7.1.1

Re: [PATCH V2 2/2] pinctrl: tegra: use pinctrl-utils APIs for mapping

[Linus Walleij]

On Wed, Aug 21, 2013 at 1:23 PM, Laxman Dewangan <ldewangan@nvidia.com> wrote:

> Pin control utility functions provides the function for creating
> map lists.
>
> In place of implementing APIs locally in Tegra pin control driver
> for creating map lists, use the utility functions. This reduces
> the code size and avoid duplication.
>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> Acked-by: Stephen Warren <swarren@nvidia.com>
> ---
> Changes from V1:
> - Rebased change on top of V1.
> - Use pinctrl_utils_dt_free_map

Patch applied.

Yours,
Linus Walleij

Re: [PATCH V2 1/2] pinctrl: utils : add support to pass config type in generic util APIs

[Stephen Warren]

On 08/21/2013 05:23 AM, Laxman Dewangan wrote:
> Add support to pass the config type like GROUP or PIN when using
> the utils or generic pin configuration APIs. This will make the
> APIs more generic.
> 
> Added additional inline APIs such that it can be use directly as
> callback for the pinctrl_ops.

The series,
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>

Re: [PATCH V2 1/2] pinctrl: utils : add support to pass config type in generic util APIs

[Linus Walleij]

On Wed, Aug 21, 2013 at 1:23 PM, Laxman Dewangan <ldewangan@nvidia.com> wrote:

> Add support to pass the config type like GROUP or PIN when using
> the utils or generic pin configuration APIs. This will make the
> APIs more generic.
>
> Added additional inline APIs such that it can be use directly as
> callback for the pinctrl_ops.
>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> ---
> Changes from V1:
> - Remove separate implementation for pins and group for
>   pinctrl_utils_dt_free_map and improve this function
>   to support both i.e. PINS and GROUPs.

Patch applied with Stephen's tags.

Yours,
Linus Walleij