138 строки
4.1 KiB
C
138 строки
4.1 KiB
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_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_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
|