[mirror_ubuntu-bionic-kernel.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_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),
	42	PCONFDUMP(PIN_CONFIG_BIAS_PULL_DOWN, "input bias pull down", NULL),
	43	PCONFDUMP(PIN_CONFIG_DRIVE_PUSH_PULL, "output drive push pull", NULL),
	44	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_DRAIN, "output drive open drain", NULL),
	45	PCONFDUMP(PIN_CONFIG_DRIVE_OPEN_SOURCE, "output drive open source", NULL),
73ae368c	46	PCONFDUMP(PIN_CONFIG_DRIVE_STRENGTH, "output drive strength", "mA"),
ea27c396	47	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT_ENABLE, "input schmitt enabled", NULL),
394349f7 LW	48	PCONFDUMP(PIN_CONFIG_INPUT_SCHMITT, "input schmitt trigger", NULL),
	49	PCONFDUMP(PIN_CONFIG_INPUT_DEBOUNCE, "input debounce", "time units"),
	50	PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector"),
684697cb	51	PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL),
394349f7	52	PCONFDUMP(PIN_CONFIG_LOW_POWER_MODE, "pin low power", "mode"),
483f33f6	53	PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level"),
394349f7 LW	54	};
	55
	56	void pinconf_generic_dump_pin(struct pinctrl_dev *pctldev,
	57	struct seq_file *s, unsigned pin)
	58	{
	59	const struct pinconf_ops *ops = pctldev->desc->confops;
	60	int i;
	61
	62	if (!ops->is_generic)
	63	return;
	64
b6465424	65	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
394349f7 LW	66	unsigned long config;
	67	int ret;
	68
	69	/* We want to check out this parameter */
	70	config = pinconf_to_config_packed(conf_items[i].param, 0);
	71	ret = pin_config_get_for_pin(pctldev, pin, &config);
	72	/* These are legal errors */
	73	if (ret == -EINVAL \|\| ret == -ENOTSUPP)
	74	continue;
	75	if (ret) {
	76	seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
	77	continue;
	78	}
	79	/* Space between multiple configs */
	80	seq_puts(s, " ");
	81	seq_puts(s, conf_items[i].display);
	82	/* Print unit if available */
	83	if (conf_items[i].format &&
	84	pinconf_to_config_argument(config) != 0)
	85	seq_printf(s, " (%u %s)",
	86	pinconf_to_config_argument(config),
	87	conf_items[i].format);
	88	}
	89	}
	90
	91	void pinconf_generic_dump_group(struct pinctrl_dev *pctldev,
	92	struct seq_file s, const char gname)
	93	{
	94	const struct pinconf_ops *ops = pctldev->desc->confops;
	95	int i;
	96
	97	if (!ops->is_generic)
	98	return;
	99
b6465424	100	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
394349f7 LW	101	unsigned long config;
	102	int ret;
	103
	104	/* We want to check out this parameter */
	105	config = pinconf_to_config_packed(conf_items[i].param, 0);
	106	ret = pin_config_group_get(dev_name(pctldev->dev), gname,
	107	&config);
	108	/* These are legal errors */
	109	if (ret == -EINVAL \|\| ret == -ENOTSUPP)
	110	continue;
	111	if (ret) {
	112	seq_printf(s, "ERROR READING CONFIG SETTING %d ", i);
	113	continue;
	114	}
	115	/* Space between multiple configs */
	116	seq_puts(s, " ");
	117	seq_puts(s, conf_items[i].display);
	118	/* Print unit if available */
	119	if (conf_items[i].format && config != 0)
	120	seq_printf(s, " (%u %s)",
	121	pinconf_to_config_argument(config),
	122	conf_items[i].format);
	123	}
	124	}
	125
9cfd1724 HZ	126	void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
	127	struct seq_file *s, unsigned long config)
	128	{
	129	int i;
	130
b6465424	131	for (i = 0; i < ARRAY_SIZE(conf_items); i++) {
9cfd1724 HZ	132	if (pinconf_to_config_param(config) != conf_items[i].param)
	133	continue;
	134	seq_printf(s, "%s: 0x%x", conf_items[i].display,
	135	pinconf_to_config_argument(config));
	136	}
	137	}
	138	EXPORT_SYMBOL_GPL(pinconf_generic_dump_config);
394349f7	139	#endif