[linux-2.6-block.git] / drivers / pinctrl / pinconf-generic.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Core driver for the generic pin config portions of the pin control subsystem
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 */

#define pr_fmt(fmt) "generic pinconfig core: " fmt

#include <linux/array_size.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/seq_file.h>

#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>

#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"

#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item conf_items[] = {
	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL, false),
	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL, false),
	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL, false),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", "ohms", true),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
				"input bias pull to pin specific state", "ohms", true),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", "ohms", true),
	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL, false),
	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL, false),
	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL, false),
	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA", true),
	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH_UA, "output drive strength", "uA", true),
	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "usec", true),
	PCONFDUMP(PIN_CONFIG_INPUT_ENABLE, "input enabled", NULL, false),
	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL, false),
	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL, false),
	PCONFDUMP(PIN_CONFIG_MODE_LOW_POWER, "pin low power", "mode", true),
	PCONFDUMP(PIN_CONFIG_OUTPUT_ENABLE, "output enabled", NULL, false),
	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level", true),
	PCONFDUMP(PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, "output impedance", "ohms", true),
	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector", true),
	PCONFDUMP(PIN_CONFIG_SLEEP_HARDWARE_STATE, "sleep hardware state", NULL, false),
	PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL, true),
	PCONFDUMP(PIN_CONFIG_SKEW_DELAY, "skew delay", NULL, true),
};

static void pinconf_generic_dump_one(struct pinctrl_dev *pctldev,
				     struct seq_file *s, const char *gname,
				     unsigned int pin,
				     const struct pin_config_item *items,
				     int nitems, int *print_sep)
{
	int i;

	for (i = 0; i < nitems; i++) {
		unsigned long config;
		int ret;

		/* We want to check out this parameter */
		config = pinconf_to_config_packed(items[i].param, 0);
		if (gname)
			ret = pin_config_group_get(dev_name(pctldev->dev),
						   gname, &config);
		else
			ret = pin_config_get_for_pin(pctldev, pin, &config);
		/* These are legal errors */
		if (ret == -EINVAL || ret == -ENOTSUPP)
			continue;
		if (ret) {
			seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
			continue;
		}
		/* comma between multiple configs */
		if (*print_sep)
			seq_puts(s, ", ");
		*print_sep = 1;
		seq_puts(s, items[i].display);
		/* Print unit if available */
		if (items[i].has_arg) {
			seq_printf(s, " (0x%x",
				   pinconf_to_config_argument(config));
			if (items[i].format)
				seq_printf(s, " %s)", items[i].format);
			else
				seq_puts(s, ")");
		}
	}
}

/**
 * pinconf_generic_dump_pins - Print information about pin or group of pins
 * @pctldev:	Pincontrol device
 * @s:		File to print to
 * @gname:	Group name specifying pins
 * @pin:	Pin number specyfying pin
 *
 * Print the pinconf configuration for the requested pin(s) to @s. Pins can be
 * specified either by pin using @pin or by group using @gname. Only one needs
 * to be specified the other can be NULL/0.
 */
void pinconf_generic_dump_pins(struct pinctrl_dev *pctldev, struct seq_file *s,
			       const char *gname, unsigned int pin)
{
	const struct pinconf_ops *ops = pctldev->desc->confops;
	int print_sep = 0;

	if (!ops->is_generic)
		return;

	/* generic parameters */
	pinconf_generic_dump_one(pctldev, s, gname, pin, conf_items,
				 ARRAY_SIZE(conf_items), &print_sep);
	/* driver-specific parameters */
	if (pctldev->desc->num_custom_params &&
	    pctldev->desc->custom_conf_items)
		pinconf_generic_dump_one(pctldev, s, gname, pin,
					 pctldev->desc->custom_conf_items,
					 pctldev->desc->num_custom_params,
					 &print_sep);
}

void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
				 struct seq_file *s, unsigned long config)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
		if (pinconf_to_config_param(config) != conf_items[i].param)
			continue;
		seq_printf(s, "%s: 0x%x", conf_items[i].display,
			   pinconf_to_config_argument(config));
	}

	if (!pctldev->desc->num_custom_params ||
	    !pctldev->desc->custom_conf_items)
		return;

	for (i = 0; i < pctldev->desc->num_custom_params; i++) {
		if (pinconf_to_config_param(config) !=
		    pctldev->desc->custom_conf_items[i].param)
			continue;
		seq_printf(s, "%s: 0x%x",
				pctldev->desc->custom_conf_items[i].display,
				pinconf_to_config_argument(config));
	}
}
EXPORT_SYMBOL_GPL(pinconf_generic_dump_config);
#endif

#ifdef CONFIG_OF
static const struct pinconf_generic_params dt_params[] = {
	{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
	{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
	{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
	{ "drive-push-pull", PIN_CONFIG_DRIVE_PUSH_PULL, 0 },
	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
	{ "drive-strength-microamp", PIN_CONFIG_DRIVE_STRENGTH_UA, 0 },
	{ "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 },
	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
	{ "input-schmitt", PIN_CONFIG_INPUT_SCHMITT, 0 },
	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
	{ "low-power-disable", PIN_CONFIG_MODE_LOW_POWER, 0 },
	{ "low-power-enable", PIN_CONFIG_MODE_LOW_POWER, 1 },
	{ "output-disable", PIN_CONFIG_OUTPUT_ENABLE, 0 },
	{ "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 },
	{ "output-high", PIN_CONFIG_OUTPUT, 1, },
	{ "output-impedance-ohms", PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, 0 },
	{ "output-low", PIN_CONFIG_OUTPUT, 0, },
	{ "power-source", PIN_CONFIG_POWER_SOURCE, 0 },
	{ "sleep-hardware-state", PIN_CONFIG_SLEEP_HARDWARE_STATE, 0 },
	{ "slew-rate", PIN_CONFIG_SLEW_RATE, 0 },
	{ "skew-delay", PIN_CONFIG_SKEW_DELAY, 0 },
};

/**
 * parse_dt_cfg() - Parse DT pinconf parameters
 * @np:	DT node
 * @params:	Array of describing generic parameters
 * @count:	Number of entries in @params
 * @cfg:	Array of parsed config options
 * @ncfg:	Number of entries in @cfg
 *
 * Parse the config options described in @params from @np and puts the result
 * in @cfg. @cfg does not need to be empty, entries are added beginning at
 * @ncfg. @ncfg is updated to reflect the number of entries after parsing. @cfg
 * needs to have enough memory allocated to hold all possible entries.
 */
static void parse_dt_cfg(struct device_node *np,
			 const struct pinconf_generic_params *params,
			 unsigned int count, unsigned long *cfg,
			 unsigned int *ncfg)
{
	int i;

	for (i = 0; i < count; i++) {
		u32 val;
		int ret;
		const struct pinconf_generic_params *par = &params[i];

		ret = of_property_read_u32(np, par->property, &val);

		/* property not found */
		if (ret == -EINVAL)
			continue;

		/* use default value, when no value is specified */
		if (ret)
			val = par->default_value;

		pr_debug("found %s with value %u\n", par->property, val);
		cfg[*ncfg] = pinconf_to_config_packed(par->param, val);
		(*ncfg)++;
	}
}

/**
 * pinconf_generic_parse_dt_config()
 * parse the config properties into generic pinconfig values.
 * @np: node containing the pinconfig properties
 * @pctldev: pincontrol device
 * @configs: array with nconfigs entries containing the generic pinconf values
 *           must be freed when no longer necessary.
 * @nconfigs: number of configurations
 */
int pinconf_generic_parse_dt_config(struct device_node *np,
				    struct pinctrl_dev *pctldev,
				    unsigned long **configs,
				    unsigned int *nconfigs)
{
	unsigned long *cfg;
	unsigned int max_cfg, ncfg = 0;
	int ret;

	if (!np)
		return -EINVAL;

	/* allocate a temporary array big enough to hold one of each option */
	max_cfg = ARRAY_SIZE(dt_params);
	if (pctldev)
		max_cfg += pctldev->desc->num_custom_params;
	cfg = kcalloc(max_cfg, sizeof(*cfg), GFP_KERNEL);
	if (!cfg)
		return -ENOMEM;

	parse_dt_cfg(np, dt_params, ARRAY_SIZE(dt_params), cfg, &ncfg);
	if (pctldev && pctldev->desc->num_custom_params &&
		pctldev->desc->custom_params)
		parse_dt_cfg(np, pctldev->desc->custom_params,
			     pctldev->desc->num_custom_params, cfg, &ncfg);

	ret = 0;

	/* no configs found at all */
	if (ncfg == 0) {
		*configs = NULL;
		*nconfigs = 0;
		goto out;
	}

	/*
	 * Now limit the number of configs to the real number of
	 * found properties.
	 */
	*configs = kmemdup(cfg, ncfg * sizeof(unsigned long), GFP_KERNEL);
	if (!*configs) {
		ret = -ENOMEM;
		goto out;
	}

	*nconfigs = ncfg;

out:
	kfree(cfg);
	return ret;
}
EXPORT_SYMBOL_GPL(pinconf_generic_parse_dt_config);

int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
		struct device_node *np, struct pinctrl_map **map,
		unsigned int *reserved_maps, unsigned int *num_maps,
		enum pinctrl_map_type type)
{
	int ret;
	const char *function;
	struct device *dev = pctldev->dev;
	unsigned long *configs = NULL;
	unsigned int num_configs = 0;
	unsigned int reserve, strings_count;
	struct property *prop;
	const char *group;
	const char *subnode_target_type = "pins";

	ret = of_property_count_strings(np, "pins");
	if (ret < 0) {
		ret = of_property_count_strings(np, "groups");
		if (ret < 0)
			/* skip this node; may contain config child nodes */
			return 0;
		if (type == PIN_MAP_TYPE_INVALID)
			type = PIN_MAP_TYPE_CONFIGS_GROUP;
		subnode_target_type = "groups";
	} else {
		if (type == PIN_MAP_TYPE_INVALID)
			type = PIN_MAP_TYPE_CONFIGS_PIN;
	}
	strings_count = ret;

	ret = of_property_read_string(np, "function", &function);
	if (ret < 0) {
		/* EINVAL=missing, which is fine since it's optional */
		if (ret != -EINVAL)
			dev_err(dev, "%pOF: could not parse property function\n",
				np);
		function = NULL;
	}

	ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
					      &num_configs);
	if (ret < 0) {
		dev_err(dev, "%pOF: could not parse node property\n", np);
		return ret;
	}

	reserve = 0;
	if (function != NULL)
		reserve++;
	if (num_configs)
		reserve++;

	reserve *= strings_count;

	ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
			num_maps, reserve);
	if (ret < 0)
		goto exit;

	of_property_for_each_string(np, subnode_target_type, prop, group) {
		if (function) {
			ret = pinctrl_utils_add_map_mux(pctldev, map,
					reserved_maps, num_maps, group,
					function);
			if (ret < 0)
				goto exit;
		}

		if (num_configs) {
			ret = pinctrl_utils_add_map_configs(pctldev, map,
					reserved_maps, num_maps, group, configs,
					num_configs, type);
			if (ret < 0)
				goto exit;
		}
	}
	ret = 0;

exit:
	kfree(configs);
	return ret;
}
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 int *num_maps, enum pinctrl_map_type type)
{
	unsigned int reserved_maps;
	struct device_node *np;
	int ret;

	reserved_maps = 0;
	*map = NULL;
	*num_maps = 0;

	ret = pinconf_generic_dt_subnode_to_map(pctldev, np_config, map,
						&reserved_maps, num_maps, type);
	if (ret < 0)
		goto exit;

	for_each_available_child_of_node(np_config, np) {
		ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
					&reserved_maps, num_maps, type);
		if (ret < 0) {
			of_node_put(np);
			goto exit;
		}
	}
	return 0;

exit:
	pinctrl_utils_free_map(pctldev, *map, *num_maps);
	return ret;
}
EXPORT_SYMBOL_GPL(pinconf_generic_dt_node_to_map);

void pinconf_generic_dt_free_map(struct pinctrl_dev *pctldev,
				 struct pinctrl_map *map,
				 unsigned int num_maps)
{
	pinctrl_utils_free_map(pctldev, map, num_maps);
}
EXPORT_SYMBOL_GPL(pinconf_generic_dt_free_map);

#endif
Commit	Line	Data
af873fce	1	// SPDX-License-Identifier: GPL-2.0-only
394349f7 LW	2	/*
	3	* Core driver for the generic pin config portions of the pin control subsystem
	4	*
	5	* Copyright (C) 2011 ST-Ericsson SA
	6	* Written on behalf of Linaro for ST-Ericsson
	7	*
	8	* Author: Linus Walleij <linus.walleij@linaro.org>
394349f7 LW	9	*/
	10
	11	#define pr_fmt(fmt) "generic pinconfig core: " fmt
	12
82cc14c9 AS	13	#include <linux/array_size.h>
82cc14c9 AS	14	#include <linux/debugfs.h>
394349f7	15	#include <linux/device.h>
82cc14c9 AS	16	#include <linux/init.h>
	17	#include <linux/module.h>
	18	#include <linux/of.h>
394349f7	19	#include <linux/slab.h>
394349f7	20	#include <linux/seq_file.h>
82cc14c9	21
394349f7	22	#include <linux/pinctrl/pinconf-generic.h>
82cc14c9 AS	23	#include <linux/pinctrl/pinconf.h>
	24	#include <linux/pinctrl/pinctrl.h>
	25
394349f7 LW	26	#include "core.h"
394349f7 LW	27	#include "pinconf.h"
e81c8f18	28	#include "pinctrl-utils.h"
394349f7 LW	29
394349f7 LW	30	#ifdef CONFIG_DEBUG_FS
2500bcc9	31	static const struct pin_config_item conf_items[] = {
3c4b23dd	32	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL, false),
eec45071 SB	33	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL, false),
eec45071 SB	34	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL, false),
188e5834	35	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", "ohms", true),
7970cb77	36	PCONFDUMP(PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
188e5834 CYT	37	"input bias pull to pin specific state", "ohms", true),
188e5834 CYT	38	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", "ohms", true),
eec45071 SB	39	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL, false),
eec45071 SB	40	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL, false),
3c4b23dd	41	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL, false),
eec45071	42	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA", true),
c08e7e4c	43	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH_UA, "output drive strength", "uA", true),
3c4b23dd	44	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "usec", true),
eec45071	45	PCONFDUMP(PIN_CONFIG_INPUT_ENABLE, "input enabled", NULL, false),
eec45071	46	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL, false),
3c4b23dd	47	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL, false),
31f9a421	48	PCONFDUMP(PIN_CONFIG_MODE_LOW_POWER, "pin low power", "mode", true),
42556242	49	PCONFDUMP(PIN_CONFIG_OUTPUT_ENABLE, "output enabled", NULL, false),
eec45071	50	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level", true),
032816fb	51	PCONFDUMP(PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, "output impedance", "ohms", true),
3c4b23dd	52	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector", true),
6606bc9d	53	PCONFDUMP(PIN_CONFIG_SLEEP_HARDWARE_STATE, "sleep hardware state", NULL, false),
3c4b23dd	54	PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL, true),
e0e1e39d	55	PCONFDUMP(PIN_CONFIG_SKEW_DELAY, "skew delay", NULL, true),
394349f7 LW	56	};
394349f7 LW	57
dd4d01f7 SB	58	static void pinconf_generic_dump_one(struct pinctrl_dev *pctldev,
dd4d01f7 SB	59	struct seq_file s, const char gname,
7cc4e6b0	60	unsigned int pin,
dd4d01f7	61	const struct pin_config_item *items,
a672eb5e	62	int nitems, int *print_sep)
394349f7	63	{
394349f7 LW	64	int i;
394349f7 LW	65
dd4d01f7	66	for (i = 0; i < nitems; i++) {
394349f7 LW	67	unsigned long config;
	68	int ret;
	69
	70	/* We want to check out this parameter */
dd4d01f7 SB	71	config = pinconf_to_config_packed(items[i].param, 0);
	72	if (gname)
	73	ret = pin_config_group_get(dev_name(pctldev->dev),
	74	gname, &config);
	75	else
	76	ret = pin_config_get_for_pin(pctldev, pin, &config);
394349f7 LW	77	/* These are legal errors */
	78	if (ret == -EINVAL \|\| ret == -ENOTSUPP)
	79	continue;
	80	if (ret) {
	81	seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
	82	continue;
	83	}
a672eb5e MY	84	/* comma between multiple configs */
	85	if (*print_sep)
	86	seq_puts(s, ", ");
	87	*print_sep = 1;
dd4d01f7	88	seq_puts(s, items[i].display);
394349f7	89	/* Print unit if available */
dd4d01f7	90	if (items[i].has_arg) {
3ba11e68	91	seq_printf(s, " (0x%x",
eec45071	92	pinconf_to_config_argument(config));
dd4d01f7 SB	93	if (items[i].format)
dd4d01f7 SB	94	seq_printf(s, " %s)", items[i].format);
eec45071 SB	95	else
	96	seq_puts(s, ")");
	97	}
394349f7 LW	98	}
	99	}
	100
dd4d01f7 SB	101	/**
	102	* pinconf_generic_dump_pins - Print information about pin or group of pins
	103	* @pctldev: Pincontrol device
	104	* @s: File to print to
	105	* @gname: Group name specifying pins
	106	* @pin: Pin number specyfying pin
	107	*
	108	* Print the pinconf configuration for the requested pin(s) to @s. Pins can be
	109	* specified either by pin using @pin or by group using @gname. Only one needs
	110	* to be specified the other can be NULL/0.
	111	*/
	112	void pinconf_generic_dump_pins(struct pinctrl_dev pctldev, struct seq_file s,
7cc4e6b0	113	const char *gname, unsigned int pin)
394349f7 LW	114	{
394349f7 LW	115	const struct pinconf_ops *ops = pctldev->desc->confops;
a672eb5e	116	int print_sep = 0;
394349f7 LW	117
	118	if (!ops->is_generic)
	119	return;
	120
dd4d01f7 SB	121	/* generic parameters */
dd4d01f7 SB	122	pinconf_generic_dump_one(pctldev, s, gname, pin, conf_items,
a672eb5e	123	ARRAY_SIZE(conf_items), &print_sep);
dd4d01f7	124	/* driver-specific parameters */
f684e4ac LW	125	if (pctldev->desc->num_custom_params &&
f684e4ac LW	126	pctldev->desc->custom_conf_items)
dd4d01f7	127	pinconf_generic_dump_one(pctldev, s, gname, pin,
f684e4ac	128	pctldev->desc->custom_conf_items,
a672eb5e MY	129	pctldev->desc->num_custom_params,
a672eb5e MY	130	&print_sep);
394349f7 LW	131	}
394349f7 LW	132
9cfd1724 HZ	133	void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
	134	struct seq_file *s, unsigned long config)
	135	{
	136	int i;
	137
b6465424	138	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
9cfd1724 HZ	139	if (pinconf_to_config_param(config) != conf_items[i].param)
	140	continue;
	141	seq_printf(s, "%s: 0x%x", conf_items[i].display,
	142	pinconf_to_config_argument(config));
	143	}
dd4d01f7	144
f684e4ac LW	145	if (!pctldev->desc->num_custom_params \|\|
f684e4ac LW	146	!pctldev->desc->custom_conf_items)
dd4d01f7 SB	147	return;
dd4d01f7 SB	148
f684e4ac LW	149	for (i = 0; i < pctldev->desc->num_custom_params; i++) {
	150	if (pinconf_to_config_param(config) !=
	151	pctldev->desc->custom_conf_items[i].param)
dd4d01f7	152	continue;
f684e4ac LW	153	seq_printf(s, "%s: 0x%x",
	154	pctldev->desc->custom_conf_items[i].display,
	155	pinconf_to_config_argument(config));
dd4d01f7	156	}
9cfd1724 HZ	157	}
9cfd1724 HZ	158	EXPORT_SYMBOL_GPL(pinconf_generic_dump_config);
394349f7	159	#endif
7db9af4b HS	160
7db9af4b HS	161	#ifdef CONFIG_OF
f684e4ac	162	static const struct pinconf_generic_params dt_params[] = {
3c4b23dd	163	{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
7db9af4b HS	164	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
7db9af4b HS	165	{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
9ee1f7d2	166	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
9ee1f7d2	167	{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
3c4b23dd	168	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
7db9af4b HS	169	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
7db9af4b HS	170	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
3c4b23dd	171	{ "drive-push-pull", PIN_CONFIG_DRIVE_PUSH_PULL, 0 },
7db9af4b	172	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
c08e7e4c	173	{ "drive-strength-microamp", PIN_CONFIG_DRIVE_STRENGTH_UA, 0 },
3c4b23dd	174	{ "input-debounce", PIN_CONFIG_INPUT_DEBOUNCE, 0 },
8ba3f4d0	175	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
3c4b23dd	176	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
69c308e2	177	{ "input-schmitt", PIN_CONFIG_INPUT_SCHMITT, 0 },
7db9af4b	178	{ "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 },
3c4b23dd	179	{ "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 },
31f9a421 AS	180	{ "low-power-disable", PIN_CONFIG_MODE_LOW_POWER, 0 },
31f9a421 AS	181	{ "low-power-enable", PIN_CONFIG_MODE_LOW_POWER, 1 },
42556242 JM	182	{ "output-disable", PIN_CONFIG_OUTPUT_ENABLE, 0 },
42556242 JM	183	{ "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 },
7db9af4b	184	{ "output-high", PIN_CONFIG_OUTPUT, 1, },
032816fb	185	{ "output-impedance-ohms", PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, 0 },
3c4b23dd MY	186	{ "output-low", PIN_CONFIG_OUTPUT, 0, },
3c4b23dd MY	187	{ "power-source", PIN_CONFIG_POWER_SOURCE, 0 },
6606bc9d	188	{ "sleep-hardware-state", PIN_CONFIG_SLEEP_HARDWARE_STATE, 0 },
3c4b23dd	189	{ "slew-rate", PIN_CONFIG_SLEW_RATE, 0 },
e0e1e39d	190	{ "skew-delay", PIN_CONFIG_SKEW_DELAY, 0 },
7db9af4b HS	191	};
7db9af4b HS	192
dd4d01f7	193	/**
f684e4ac	194	* parse_dt_cfg() - Parse DT pinconf parameters
dd4d01f7	195	* @np: DT node
f684e4ac	196	* @params: Array of describing generic parameters
dd4d01f7 SB	197	* @count: Number of entries in @params
	198	* @cfg: Array of parsed config options
	199	* @ncfg: Number of entries in @cfg
	200	*
	201	* Parse the config options described in @params from @np and puts the result
3ec440e3	202	* in @cfg. @cfg does not need to be empty, entries are added beginning at
dd4d01f7 SB	203	* @ncfg. @ncfg is updated to reflect the number of entries after parsing. @cfg
	204	* needs to have enough memory allocated to hold all possible entries.
	205	*/
	206	static void parse_dt_cfg(struct device_node *np,
f684e4ac	207	const struct pinconf_generic_params *params,
dd4d01f7 SB	208	unsigned int count, unsigned long *cfg,
	209	unsigned int *ncfg)
	210	{
	211	int i;
	212
	213	for (i = 0; i < count; i++) {
	214	u32 val;
	215	int ret;
f684e4ac	216	const struct pinconf_generic_params *par = &params[i];
dd4d01f7 SB	217
	218	ret = of_property_read_u32(np, par->property, &val);
	219
	220	/* property not found */
	221	if (ret == -EINVAL)
	222	continue;
	223
	224	/* use default value, when no value is specified */
	225	if (ret)
	226	val = par->default_value;
	227
	228	pr_debug("found %s with value %u\n", par->property, val);
	229	cfg[*ncfg] = pinconf_to_config_packed(par->param, val);
	230	(*ncfg)++;
	231	}
	232	}
	233
7db9af4b HS	234	/**
	235	* pinconf_generic_parse_dt_config()
	236	* parse the config properties into generic pinconfig values.
	237	* @np: node containing the pinconfig properties
b4dab774	238	* @pctldev: pincontrol device
7db9af4b	239	* @configs: array with nconfigs entries containing the generic pinconf values
d9ac5e25	240	* must be freed when no longer necessary.
b4dab774	241	* @nconfigs: number of configurations
7db9af4b HS	242	*/
7db9af4b HS	243	int pinconf_generic_parse_dt_config(struct device_node *np,
dd4d01f7	244	struct pinctrl_dev *pctldev,
7db9af4b HS	245	unsigned long **configs,
	246	unsigned int *nconfigs)
	247	{
6abab2d4	248	unsigned long *cfg;
dd4d01f7	249	unsigned int max_cfg, ncfg = 0;
7db9af4b	250	int ret;
7db9af4b HS	251
	252	if (!np)
	253	return -EINVAL;
	254
6abab2d4	255	/* allocate a temporary array big enough to hold one of each option */
dd4d01f7 SB	256	max_cfg = ARRAY_SIZE(dt_params);
dd4d01f7 SB	257	if (pctldev)
f684e4ac	258	max_cfg += pctldev->desc->num_custom_params;
dd4d01f7	259	cfg = kcalloc(max_cfg, sizeof(*cfg), GFP_KERNEL);
6abab2d4 HS	260	if (!cfg)
	261	return -ENOMEM;
	262
dd4d01f7	263	parse_dt_cfg(np, dt_params, ARRAY_SIZE(dt_params), cfg, &ncfg);
f684e4ac LW	264	if (pctldev && pctldev->desc->num_custom_params &&
	265	pctldev->desc->custom_params)
	266	parse_dt_cfg(np, pctldev->desc->custom_params,
	267	pctldev->desc->num_custom_params, cfg, &ncfg);
7db9af4b	268
6abab2d4 HS	269	ret = 0;
6abab2d4 HS	270
e4a8844c HS	271	/* no configs found at all */
	272	if (ncfg == 0) {
	273	*configs = NULL;
	274	*nconfigs = 0;
6abab2d4	275	goto out;
e4a8844c HS	276	}
e4a8844c HS	277
7db9af4b HS	278	/*
	279	* Now limit the number of configs to the real number of
	280	* found properties.
	281	*/
db388dfb	282	configs = kmemdup(cfg, ncfg sizeof(unsigned long), GFP_KERNEL);
6abab2d4 HS	283	if (!*configs) {
	284	ret = -ENOMEM;
	285	goto out;
	286	}
7db9af4b	287
7db9af4b	288	*nconfigs = ncfg;
6abab2d4 HS	289
	290	out:
	291	kfree(cfg);
	292	return ret;
7db9af4b	293	}
b88d1451	294	EXPORT_SYMBOL_GPL(pinconf_generic_parse_dt_config);
e81c8f18 LD	295
	296	int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
	297	struct device_node np, struct pinctrl_map *map,
7cc4e6b0	298	unsigned int reserved_maps, unsigned int num_maps,
3287c240	299	enum pinctrl_map_type type)
e81c8f18 LD	300	{
	301	int ret;
	302	const char *function;
	303	struct device *dev = pctldev->dev;
	304	unsigned long *configs = NULL;
7cc4e6b0 AS	305	unsigned int num_configs = 0;
7cc4e6b0 AS	306	unsigned int reserve, strings_count;
e81c8f18 LD	307	struct property *prop;
e81c8f18 LD	308	const char *group;
31c89c95	309	const char *subnode_target_type = "pins";
e81c8f18	310
c7289500 BS	311	ret = of_property_count_strings(np, "pins");
	312	if (ret < 0) {
	313	ret = of_property_count_strings(np, "groups");
	314	if (ret < 0)
	315	/* skip this node; may contain config child nodes */
	316	return 0;
	317	if (type == PIN_MAP_TYPE_INVALID)
	318	type = PIN_MAP_TYPE_CONFIGS_GROUP;
	319	subnode_target_type = "groups";
	320	} else {
	321	if (type == PIN_MAP_TYPE_INVALID)
	322	type = PIN_MAP_TYPE_CONFIGS_PIN;
	323	}
	324	strings_count = ret;
	325
e81c8f18 LD	326	ret = of_property_read_string(np, "function", &function);
	327	if (ret < 0) {
	328	/* EINVAL=missing, which is fine since it's optional */
	329	if (ret != -EINVAL)
f5292d06 RH	330	dev_err(dev, "%pOF: could not parse property function\n",
f5292d06 RH	331	np);
e81c8f18 LD	332	function = NULL;
	333	}
	334
dd4d01f7 SB	335	ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
dd4d01f7 SB	336	&num_configs);
e81c8f18	337	if (ret < 0) {
f5292d06	338	dev_err(dev, "%pOF: could not parse node property\n", np);
e81c8f18 LD	339	return ret;
	340	}
	341
	342	reserve = 0;
	343	if (function != NULL)
	344	reserve++;
	345	if (num_configs)
	346	reserve++;
31c89c95	347
c7289500	348	reserve *= strings_count;
e81c8f18 LD	349
	350	ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
	351	num_maps, reserve);
	352	if (ret < 0)
	353	goto exit;
	354
31c89c95	355	of_property_for_each_string(np, subnode_target_type, prop, group) {
e81c8f18 LD	356	if (function) {
	357	ret = pinctrl_utils_add_map_mux(pctldev, map,
	358	reserved_maps, num_maps, group,
	359	function);
	360	if (ret < 0)
	361	goto exit;
	362	}
	363
	364	if (num_configs) {
	365	ret = pinctrl_utils_add_map_configs(pctldev, map,
	366	reserved_maps, num_maps, group, configs,
3287c240	367	num_configs, type);
e81c8f18 LD	368	if (ret < 0)
	369	goto exit;
	370	}
	371	}
	372	ret = 0;
	373
	374	exit:
	375	kfree(configs);
	376	return ret;
	377	}
	378	EXPORT_SYMBOL_GPL(pinconf_generic_dt_subnode_to_map);
	379
	380	int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev,
	381	struct device_node np_config, struct pinctrl_map *map,
7cc4e6b0	382	unsigned int *num_maps, enum pinctrl_map_type type)
e81c8f18	383	{
7cc4e6b0	384	unsigned int reserved_maps;
e81c8f18 LD	385	struct device_node *np;
	386	int ret;
	387
	388	reserved_maps = 0;
	389	*map = NULL;
	390	*num_maps = 0;
	391
c7289500 BS	392	ret = pinconf_generic_dt_subnode_to_map(pctldev, np_config, map,
	393	&reserved_maps, num_maps, type);
	394	if (ret < 0)
	395	goto exit;
	396
e06c2ee5	397	for_each_available_child_of_node(np_config, np) {
e81c8f18	398	ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
3287c240	399	&reserved_maps, num_maps, type);
5ead9328 Z	400	if (ret < 0) {
5ead9328 Z	401	of_node_put(np);
c7289500	402	goto exit;
5ead9328	403	}
e81c8f18 LD	404	}
e81c8f18 LD	405	return 0;
c7289500 BS	406
c7289500 BS	407	exit:
d32f7fd3	408	pinctrl_utils_free_map(pctldev, map, num_maps);
c7289500	409	return ret;
e81c8f18 LD	410	}
	411	EXPORT_SYMBOL_GPL(pinconf_generic_dt_node_to_map);
	412
8dfebf57 JH	413	void pinconf_generic_dt_free_map(struct pinctrl_dev *pctldev,
8dfebf57 JH	414	struct pinctrl_map *map,
7cc4e6b0	415	unsigned int num_maps)
8dfebf57 JH	416	{
	417	pinctrl_utils_free_map(pctldev, map, num_maps);
	418	}
	419	EXPORT_SYMBOL_GPL(pinconf_generic_dt_free_map);
	420
7db9af4b	421	#endif