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yaml --- r: 294103 b: refs/heads/master c: 394349f h: refs/heads/master i: 294101: 2ba3a54 294099: 9a08a1c 294095: 85850e9 v: v3
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Linus Walleij
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Mar 12, 2012
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 70b36378d44d7f5e62458a830b1a9bb1c570f28a | ||
| refs/heads/master: 394349f7789fdfcdc74b61afcac84046535c40b7 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -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 | ||
|
|
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| struct pin_config_item { | ||
| const enum pin_config_param param; | ||
| const char * const display; | ||
| const char * const format; | ||
| }; | ||
|
|
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| #define PCONFDUMP(a, b, c) { .param = a, .display = b, .format = c } | ||
|
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| 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; | ||
|
|
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| 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; | ||
|
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| 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 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /* | ||
| * Interface the generic pinconfig portions of the pinctrl subsystem | ||
| * | ||
| * Copyright (C) 2011 ST-Ericsson SA | ||
| * Written on behalf of Linaro for ST-Ericsson | ||
| * This interface is used in the core to keep track of pins. | ||
| * | ||
| * Author: Linus Walleij <linus.walleij@linaro.org> | ||
| * | ||
| * License terms: GNU General Public License (GPL) version 2 | ||
| */ | ||
| #ifndef __LINUX_PINCTRL_PINCONF_GENERIC_H | ||
| #define __LINUX_PINCTRL_PINCONF_GENERIC_H | ||
|
|
||
| /* | ||
| * You shouldn't even be able to compile with these enums etc unless you're | ||
| * using generic pin config. That is why this is defined out. | ||
| */ | ||
| #ifdef CONFIG_GENERIC_PINCONF | ||
|
|
||
| /** | ||
| * enum pin_config_param - possible pin configuration parameters | ||
| * @PIN_CONFIG_BIAS_DISABLE: disable any pin bias on the pin, a | ||
| * transition from say pull-up to pull-down implies that you disable | ||
| * pull-up in the process, this setting disables all biasing. | ||
| * @PIN_CONFIG_BIAS_HIGH_IMPEDANCE: the pin will be set to a high impedance | ||
| * mode, also know as "third-state" (tristate) or "high-Z" or "floating". | ||
| * On output pins this effectively disconnects the pin, which is useful | ||
| * if for example some other pin is going to drive the signal connected | ||
| * to it for a while. Pins used for input are usually always high | ||
| * impedance. | ||
| * @PIN_CONFIG_BIAS_PULL_UP: the pin will be pulled up (usually with high | ||
| * impedance to VDD). If the argument is != 0 pull-up is enabled, | ||
| * if it is 0, pull-up is disabled. | ||
| * @PIN_CONFIG_BIAS_PULL_DOWN: the pin will be pulled down (usually with high | ||
| * impedance to GROUND). If the argument is != 0 pull-down is enabled, | ||
| * if it is 0, pull-down is disabled. | ||
| * @PIN_CONFIG_DRIVE_PUSH_PULL: the pin will be driven actively high and | ||
| * low, this is the most typical case and is typically achieved with two | ||
| * active transistors on the output. Sending this config will enabale | ||
| * push-pull mode, the argument is ignored. | ||
| * @PIN_CONFIG_DRIVE_OPEN_DRAIN: the pin will be driven with open drain (open | ||
| * collector) which means it is usually wired with other output ports | ||
| * which are then pulled up with an external resistor. Sending this | ||
| * config will enabale open drain mode, the argument is ignored. | ||
| * @PIN_CONFIG_DRIVE_OPEN_SOURCE: the pin will be driven with open source | ||
| * (open emitter). Sending this config will enabale open drain mode, the | ||
| * argument is ignored. | ||
| * @PIN_CONFIG_INPUT_SCHMITT: this will configure an input pin to run in | ||
| * schmitt-trigger mode. If the schmitt-trigger has adjustable hysteresis, | ||
| * the threshold value is given on a custom format as argument when | ||
| * setting pins to this mode. The argument zero turns the schmitt trigger | ||
| * off. | ||
| * @PIN_CONFIG_INPUT_DEBOUNCE: this will configure the pin to debounce mode, | ||
| * which means it will wait for signals to settle when reading inputs. The | ||
| * argument gives the debounce time on a custom format. Setting the | ||
| * argument to zero turns debouncing off. | ||
| * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power | ||
| * supplies, the argument to this parameter (on a custom format) tells | ||
| * the driver which alternative power source to use. | ||
| * @PIN_CONFIG_LOW_POWER_MODE: this will configure the pin for low power | ||
| * operation, if several modes of operation are supported these can be | ||
| * passed in the argument on a custom form, else just use argument 1 | ||
| * to indicate low power mode, argument 0 turns low power mode off. | ||
| * @PIN_CONFIG_END: this is the last enumerator for pin configurations, if | ||
| * you need to pass in custom configurations to the pin controller, use | ||
| * PIN_CONFIG_END+1 as the base offset. | ||
| */ | ||
| enum pin_config_param { | ||
| PIN_CONFIG_BIAS_DISABLE, | ||
| PIN_CONFIG_BIAS_HIGH_IMPEDANCE, | ||
| PIN_CONFIG_BIAS_PULL_UP, | ||
| PIN_CONFIG_BIAS_PULL_DOWN, | ||
| PIN_CONFIG_DRIVE_PUSH_PULL, | ||
| PIN_CONFIG_DRIVE_OPEN_DRAIN, | ||
| PIN_CONFIG_DRIVE_OPEN_SOURCE, | ||
| PIN_CONFIG_INPUT_SCHMITT, | ||
| PIN_CONFIG_INPUT_DEBOUNCE, | ||
| PIN_CONFIG_POWER_SOURCE, | ||
| PIN_CONFIG_LOW_POWER_MODE, | ||
| PIN_CONFIG_END = 0x7FFF, | ||
| }; | ||
|
|
||
| /* | ||
| * Helpful configuration macro to be used in tables etc. | ||
| */ | ||
| #define PIN_CONF_PACKED(p, a) ((a << 16) | ((unsigned long) p & 0xffffUL)) | ||
|
|
||
| /* | ||
| * The following inlines stuffs a configuration parameter and data value | ||
| * into and out of an unsigned long argument, as used by the generic pin config | ||
| * system. We put the parameter in the lower 16 bits and the argument in the | ||
| * upper 16 bits. | ||
| */ | ||
|
|
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| static inline enum pin_config_param pinconf_to_config_param(unsigned long config) | ||
| { | ||
| return (enum pin_config_param) (config & 0xffffUL); | ||
| } | ||
|
|
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| static inline u16 pinconf_to_config_argument(unsigned long config) | ||
| { | ||
| return (enum pin_config_param) ((config >> 16) & 0xffffUL); | ||
| } | ||
|
|
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| static inline unsigned long pinconf_to_config_packed(enum pin_config_param param, | ||
| u16 argument) | ||
| { | ||
| return PIN_CONF_PACKED(param, argument); | ||
| } | ||
|
|
||
| #endif /* CONFIG_GENERIC_PINCONF */ | ||
|
|
||
| #endif /* __LINUX_PINCTRL_PINCONF_GENERIC_H */ |
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