diff options
Diffstat (limited to 'drivers/pinctrl/pinconf-generic.c')
| -rw-r--r-- | drivers/pinctrl/pinconf-generic.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c new file mode 100644 index 000000000000..33fbaeaa65dd --- /dev/null +++ b/drivers/pinctrl/pinconf-generic.c @@ -0,0 +1,120 @@ +/* + * 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/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 } + +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, "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_LOW_POWER_MODE, "pin low power", "mode"), +}; + +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); + } +} + +#endif |