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

/*
 * 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>
 *
 * License terms: GNU General Public License (GPL) version 2
 */

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

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include "core.h"
#include "pinconf.h"

#ifdef CONFIG_DEBUG_FS

struct pin_config_item {
	const enum pin_config_param param;
	const char * const display;
	const char * const format;
};

#define PCONFDUMP(a, b, c) { .param = a, .display = b, .format = c }

static struct pin_config_item conf_items[] = {
	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL),
	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL),
	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", NULL),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", NULL),
	PCONFDUMP(PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
				"input bias pull to pin specific state", NULL),
	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL),
	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL),
	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL),
	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA"),
	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL),
	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL),
	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "time units"),
	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector"),
	PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL),
	PCONFDUMP(PIN_CONFIG_LOW_POWER_MODE, "pin low power", "mode"),
	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level"),
};

void pinconf_generic_dump_pin(struct pinctrl_dev *pctldev,
			      struct seq_file *s, unsigned pin)
{
	const struct pinconf_ops *ops = pctldev->desc->confops;
	int i;

	if (!ops->is_generic)
		return;

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

		/* We want to check out this parameter */
		config = pinconf_to_config_packed(conf_items[i].param, 0);
		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;
		}
		/* Space between multiple configs */
		seq_puts(s, " ");
		seq_puts(s, conf_items[i].display);
		/* Print unit if available */
		if (conf_items[i].format &&
		    pinconf_to_config_argument(config) != 0)
			seq_printf(s, " (%u %s)",
				   pinconf_to_config_argument(config),
				   conf_items[i].format);
	}
}

void pinconf_generic_dump_group(struct pinctrl_dev *pctldev,
			      struct seq_file *s, const char *gname)
{
	const struct pinconf_ops *ops = pctldev->desc->confops;
	int i;

	if (!ops->is_generic)
		return;

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

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

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));
	}
}
EXPORT_SYMBOL_GPL(pinconf_generic_dump_config);
#endif
Commit	Line	Data
394349f7 LW	1	/*
	2	* Core driver for the generic pin config portions of the pin control subsystem
	3	*
	4	* Copyright (C) 2011 ST-Ericsson SA
	5	* Written on behalf of Linaro for ST-Ericsson
	6	*
	7	* Author: Linus Walleij <linus.walleij@linaro.org>
	8	*
	9	* License terms: GNU General Public License (GPL) version 2
	10	*/
	11
	12	#define pr_fmt(fmt) "generic pinconfig core: " fmt
	13
	14	#include <linux/kernel.h>
9cfd1724	15	#include <linux/module.h>
394349f7 LW	16	#include <linux/init.h>
	17	#include <linux/device.h>
	18	#include <linux/slab.h>
	19	#include <linux/debugfs.h>
	20	#include <linux/seq_file.h>
	21	#include <linux/pinctrl/pinctrl.h>
	22	#include <linux/pinctrl/pinconf.h>
	23	#include <linux/pinctrl/pinconf-generic.h>
	24	#include "core.h"
	25	#include "pinconf.h"
	26
	27	#ifdef CONFIG_DEBUG_FS
	28
	29	struct pin_config_item {
	30	const enum pin_config_param param;
	31	const char * const display;
	32	const char * const format;
	33	};
	34
	35	#define PCONFDUMP(a, b, c) { .param = a, .display = b, .format = c }
	36
1ef465c0	37	static struct pin_config_item conf_items[] = {
394349f7 LW	38	PCONFDUMP(PIN_CONFIG_BIAS_DISABLE, "input bias disabled", NULL),
394349f7 LW	39	PCONFDUMP(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, "input bias high impedance", NULL),
a2df4269	40	PCONFDUMP(PIN_CONFIG_BIAS_BUS_HOLD, "input bias bus hold", NULL),
394349f7 LW	41	PCONFDUMP(PIN_CONFIG_BIAS_PULL_UP, "input bias pull up", NULL),
394349f7 LW	42	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", NULL),
7970cb77 HS	43	PCONFDUMP(PIN_CONFIG_BIAS_PULL_PIN_DEFAULT,
7970cb77 HS	44	"input bias pull to pin specific state", NULL),
394349f7 LW	45	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL),
	46	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL),
	47	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL),
73ae368c	48	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA"),
ea27c396	49	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL),
394349f7 LW	50	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL),
	51	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "time units"),
	52	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector"),
684697cb	53	PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL),
394349f7	54	PCONFDUMP(PIN_CONFIG_LOW_POWER_MODE, "pin low power", "mode"),
483f33f6	55	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level"),
394349f7 LW	56	};
	57
	58	void pinconf_generic_dump_pin(struct pinctrl_dev *pctldev,
	59	struct seq_file *s, unsigned pin)
	60	{
	61	const struct pinconf_ops *ops = pctldev->desc->confops;
	62	int i;
	63
	64	if (!ops->is_generic)
	65	return;
	66
b6465424	67	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
394349f7 LW	68	unsigned long config;
	69	int ret;
	70
	71	/* We want to check out this parameter */
	72	config = pinconf_to_config_packed(conf_items[i].param, 0);
	73	ret = pin_config_get_for_pin(pctldev, pin, &config);
	74	/* These are legal errors */
	75	if (ret == -EINVAL \|\| ret == -ENOTSUPP)
	76	continue;
	77	if (ret) {
	78	seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
	79	continue;
	80	}
	81	/* Space between multiple configs */
	82	seq_puts(s, " ");
	83	seq_puts(s, conf_items[i].display);
	84	/* Print unit if available */
	85	if (conf_items[i].format &&
	86	pinconf_to_config_argument(config) != 0)
	87	seq_printf(s, " (%u %s)",
	88	pinconf_to_config_argument(config),
	89	conf_items[i].format);
	90	}
	91	}
	92
	93	void pinconf_generic_dump_group(struct pinctrl_dev *pctldev,
	94	struct seq_file s, const char gname)
	95	{
	96	const struct pinconf_ops *ops = pctldev->desc->confops;
	97	int i;
	98
	99	if (!ops->is_generic)
	100	return;
	101
b6465424	102	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
394349f7 LW	103	unsigned long config;
	104	int ret;
	105
	106	/* We want to check out this parameter */
	107	config = pinconf_to_config_packed(conf_items[i].param, 0);
	108	ret = pin_config_group_get(dev_name(pctldev->dev), gname,
	109	&config);
	110	/* These are legal errors */
	111	if (ret == -EINVAL \|\| ret == -ENOTSUPP)
	112	continue;
	113	if (ret) {
	114	seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
	115	continue;
	116	}
	117	/* Space between multiple configs */
	118	seq_puts(s, " ");
	119	seq_puts(s, conf_items[i].display);
	120	/* Print unit if available */
	121	if (conf_items[i].format && config != 0)
	122	seq_printf(s, " (%u %s)",
	123	pinconf_to_config_argument(config),
	124	conf_items[i].format);
	125	}
	126	}
	127
9cfd1724 HZ	128	void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
	129	struct seq_file *s, unsigned long config)
	130	{
	131	int i;
	132
b6465424	133	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
9cfd1724 HZ	134	if (pinconf_to_config_param(config) != conf_items[i].param)
	135	continue;
	136	seq_printf(s, "%s: 0x%x", conf_items[i].display,
	137	pinconf_to_config_argument(config));
	138	}
	139	}
	140	EXPORT_SYMBOL_GPL(pinconf_generic_dump_config);
394349f7	141	#endif