pinctrl: add utility functions for add map/configs

Some of pincontrol driver needs the utility function to create map list. The utility function needed for adding mux, configs etc. In place of duplicating this in each driver, add the common utility function in common file and use from device specific driver. This will reduce the duplicating of code across drivers. Changes from V1: - Add this files in this patch and add common utility APIs to here. Changes from V2: - Nothing in code. - Added Reviewed by Stephen. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: add utility functions for add map/configs
Some of pincontrol driver needs the utility function to create map list. The utility function needed for adding mux, configs etc. In place of duplicating this in each driver, add the common utility function in common file and use from device specific driver. This will reduce the duplicating of code across drivers. Changes from V1: - Add this files in this patch and add common utility APIs to here. Changes from V2: - Nothing in code. - Added Reviewed by Stephen. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Laxman Dewangan · Linus Walleij
1 parent 744f0a9adb
Showing 3 changed files with 179 additions and 1 deletions Side-by-side Diff
drivers/pinctrl/Makefile
drivers/pinctrl/pinctrl-utils.c
drivers/pinctrl/pinctrl-utils.h
@@ -2,7 +2,7 @@
  
 ccflags-$(CONFIG_DEBUG_PINCTRL)	+= -DDEBUG
  
-obj-$(CONFIG_PINCTRL)		+= core.o
+obj-$(CONFIG_PINCTRL)		+= core.o pinctrl-utils.o
 obj-$(CONFIG_PINMUX)		+= pinmux.o
 obj-$(CONFIG_PINCONF)		+= pinconf.o
 ifeq ($(CONFIG_OF),y)
+/*
+ * Utils functions to implement the pincontrol driver.
+ *
+ * Copyright (c) 2013, NVIDIA Corporation.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include "core.h"
+#include "pinctrl-utils.h"
+
+int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
+		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(pctldev->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;
+}
+EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
+
+int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
+		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;
+}
+EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
+
+int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
+		struct pinctrl_map **map, unsigned *reserved_maps,
+		unsigned *num_maps, const char *group,
+		unsigned long *configs, unsigned num_configs,
+		enum pinctrl_map_type type)
+{
+	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(pctldev->dev, "kmemdup(configs) failed\n");
+		return -ENOMEM;
+	}
+
+	(*map)[*num_maps].type = type;
+	(*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;
+}
+EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
+
+int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
+		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(pctldev->dev, "krealloc(configs) failed\n");
+		return -ENOMEM;
+	}
+
+	new_configs[old_num] = config;
+
+	*configs = new_configs;
+	*num_configs = new_num;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
+
+void pinctrl_utils_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);
+}
+EXPORT_SYMBOL_GPL(pinctrl_utils_dt_free_map);
+/*
+ * Utils functions to implement the pincontrol driver.
+ *
+ * Copyright (c) 2013, NVIDIA Corporation.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+#ifndef __PINCTRL_UTILS_H__
+#define __PINCTRL_UTILS_H__
+
+int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
+		struct pinctrl_map **map, unsigned *reserved_maps,
+		unsigned *num_maps, unsigned reserve);
+int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
+		struct pinctrl_map **map, unsigned *reserved_maps,
+		unsigned *num_maps, const char *group,
+		const char *function);
+int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
+		struct pinctrl_map **map, unsigned *reserved_maps,
+		unsigned *num_maps, const char *group,
+		unsigned long *configs, unsigned num_configs,
+		enum pinctrl_map_type type);
+int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
+		unsigned long **configs, unsigned *num_configs,
+		unsigned long config);
+void pinctrl_utils_dt_free_map(struct pinctrl_dev *pctldev,
+		struct pinctrl_map *map, unsigned num_maps);
+
+#endif /* __PINCTRL_UTILS_H__ */
...	...	@@ -2,7 +2,7 @@
2	2
3	3	ccflags-$(CONFIG_DEBUG_PINCTRL) += -DDEBUG
4	4
5		-obj-$(CONFIG_PINCTRL) += core.o
	5	+obj-$(CONFIG_PINCTRL) += core.o pinctrl-utils.o
6	6	obj-$(CONFIG_PINMUX) += pinmux.o
7	7	obj-$(CONFIG_PINCONF) += pinconf.o
8	8	ifeq ($(CONFIG_OF),y)
	1	+/*
	2	+ * Utils functions to implement the pincontrol driver.
	3	+ *
	4	+ * Copyright (c) 2013, NVIDIA Corporation.
	5	+ *
	6	+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
	7	+ *
	8	+ * This program is free software; you can redistribute it and/or
	9	+ * modify it under the terms of the GNU General Public License as
	10	+ * published by the Free Software Foundation version 2.
	11	+ *
	12	+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
	13	+ * whether express or implied; without even the implied warranty of
	14	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	+ * General Public License for more details.
	16	+ *
	17	+ * You should have received a copy of the GNU General Public License
	18	+ * along with this program; if not, write to the Free Software
	19	+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	+ * 02111-1307, USA
	21	+ */
	22	+#include <linux/device.h>
	23	+#include <linux/kernel.h>
	24	+#include <linux/pinctrl/pinctrl.h>
	25	+#include <linux/of.h>
	26	+#include <linux/slab.h>
	27	+#include "core.h"
	28	+#include "pinctrl-utils.h"
	29	+
	30	+int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev,
	31	+ struct pinctrl_map *map, unsigned reserved_maps,
	32	+ unsigned *num_maps, unsigned reserve)
	33	+{
	34	+ unsigned old_num = *reserved_maps;
	35	+ unsigned new_num = *num_maps + reserve;
	36	+ struct pinctrl_map *new_map;
	37	+
	38	+ if (old_num >= new_num)
	39	+ return 0;
	40	+
	41	+ new_map = krealloc(map, sizeof(new_map) * new_num, GFP_KERNEL);
	42	+ if (!new_map) {
	43	+ dev_err(pctldev->dev, "krealloc(map) failed\n");
	44	+ return -ENOMEM;
	45	+ }
	46	+
	47	+ memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
	48	+
	49	+ *map = new_map;
	50	+ *reserved_maps = new_num;
	51	+ return 0;
	52	+}
	53	+EXPORT_SYMBOL_GPL(pinctrl_utils_reserve_map);
	54	+
	55	+int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev,
	56	+ struct pinctrl_map *map, unsigned reserved_maps,
	57	+ unsigned num_maps, const char group,
	58	+ const char *function)
	59	+{
	60	+ if (WARN_ON(num_maps == reserved_maps))
	61	+ return -ENOSPC;
	62	+
	63	+ (map)[num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	64	+ (map)[num_maps].data.mux.group = group;
	65	+ (map)[num_maps].data.mux.function = function;
	66	+ (*num_maps)++;
	67	+
	68	+ return 0;
	69	+}
	70	+EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_mux);
	71	+
	72	+int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev,
	73	+ struct pinctrl_map *map, unsigned reserved_maps,
	74	+ unsigned num_maps, const char group,
	75	+ unsigned long *configs, unsigned num_configs,
	76	+ enum pinctrl_map_type type)
	77	+{
	78	+ unsigned long *dup_configs;
	79	+
	80	+ if (WARN_ON(num_maps == reserved_maps))
	81	+ return -ENOSPC;
	82	+
	83	+ dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
	84	+ GFP_KERNEL);
	85	+ if (!dup_configs) {
	86	+ dev_err(pctldev->dev, "kmemdup(configs) failed\n");
	87	+ return -ENOMEM;
	88	+ }
	89	+
	90	+ (map)[num_maps].type = type;
	91	+ (map)[num_maps].data.configs.group_or_pin = group;
	92	+ (map)[num_maps].data.configs.configs = dup_configs;
	93	+ (map)[num_maps].data.configs.num_configs = num_configs;
	94	+ (*num_maps)++;
	95	+
	96	+ return 0;
	97	+}
	98	+EXPORT_SYMBOL_GPL(pinctrl_utils_add_map_configs);
	99	+
	100	+int pinctrl_utils_add_config(struct pinctrl_dev *pctldev,
	101	+ unsigned long *configs, unsigned num_configs,
	102	+ unsigned long config)
	103	+{
	104	+ unsigned old_num = *num_configs;
	105	+ unsigned new_num = old_num + 1;
	106	+ unsigned long *new_configs;
	107	+
	108	+ new_configs = krealloc(configs, sizeof(new_configs) * new_num,
	109	+ GFP_KERNEL);
	110	+ if (!new_configs) {
	111	+ dev_err(pctldev->dev, "krealloc(configs) failed\n");
	112	+ return -ENOMEM;
	113	+ }
	114	+
	115	+ new_configs[old_num] = config;
	116	+
	117	+ *configs = new_configs;
	118	+ *num_configs = new_num;
	119	+
	120	+ return 0;
	121	+}
	122	+EXPORT_SYMBOL_GPL(pinctrl_utils_add_config);
	123	+
	124	+void pinctrl_utils_dt_free_map(struct pinctrl_dev *pctldev,
	125	+ struct pinctrl_map *map, unsigned num_maps)
	126	+{
	127	+ int i;
	128	+
	129	+ for (i = 0; i < num_maps; i++)
	130	+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
	131	+ kfree(map[i].data.configs.configs);
	132	+
	133	+ kfree(map);
	134	+}
	135	+EXPORT_SYMBOL_GPL(pinctrl_utils_dt_free_map);