diff options
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 378 |
1 files changed, 238 insertions, 140 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 41fd84738707..83254a95ef17 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -12,27 +12,26 @@ */ #define pr_fmt(fmt) "pinctrl core: " fmt +#include <linux/array_size.h> +#include <linux/cleanup.h> #include <linux/debugfs.h> #include <linux/device.h> #include <linux/err.h> #include <linux/export.h> #include <linux/init.h> -#include <linux/kernel.h> #include <linux/kref.h> #include <linux/list.h> #include <linux/seq_file.h> #include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/gpio/driver.h> + #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/devinfo.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/pinctrl.h> -#ifdef CONFIG_GPIOLIB -#include "../gpio/gpiolib.h" -#include <asm-generic/gpio.h> -#endif - #include "core.h" #include "devicetree.h" #include "pinconf.h" @@ -71,6 +70,7 @@ void pinctrl_provide_dummies(void) { pinctrl_dummy_state = true; } +EXPORT_SYMBOL_GPL(pinctrl_provide_dummies); const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev) { @@ -144,7 +144,7 @@ struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np) */ int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name) { - unsigned i, pin; + unsigned int i, pin; /* The pin number can be retrived from the pin controller descriptor */ for (i = 0; i < pctldev->desc->npins; i++) { @@ -165,7 +165,7 @@ int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name) * @pctldev: the pin control device to lookup the pin on * @pin: pin number/id to look up */ -const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin) +const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned int pin) { const struct pin_desc *desc; @@ -183,7 +183,7 @@ EXPORT_SYMBOL_GPL(pin_get_name); /* Deletes a range of pin descriptors */ static void pinctrl_free_pindescs(struct pinctrl_dev *pctldev, const struct pinctrl_pin_desc *pins, - unsigned num_pins) + unsigned int num_pins) { int i; @@ -206,6 +206,7 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, const struct pinctrl_pin_desc *pin) { struct pin_desc *pindesc; + int error; pindesc = pin_desc_get(pctldev, pin->number); if (pindesc) { @@ -220,6 +221,9 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, /* Set owner */ pindesc->pctldev = pctldev; +#ifdef CONFIG_PINMUX + mutex_init(&pindesc->mux_lock); +#endif /* Copy basic pin info */ if (pin->name) { @@ -227,25 +231,32 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, } else { pindesc->name = kasprintf(GFP_KERNEL, "PIN%u", pin->number); if (!pindesc->name) { - kfree(pindesc); - return -ENOMEM; + error = -ENOMEM; + goto failed; } pindesc->dynamic_name = true; } pindesc->drv_data = pin->drv_data; - radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc); + error = radix_tree_insert(&pctldev->pin_desc_tree, pin->number, pindesc); + if (error) + goto failed; + pr_debug("registered pin %d (%s) on %s\n", pin->number, pindesc->name, pctldev->desc->name); return 0; + +failed: + kfree(pindesc); + return error; } static int pinctrl_register_pins(struct pinctrl_dev *pctldev, const struct pinctrl_pin_desc *pins, - unsigned num_descs) + unsigned int num_descs) { - unsigned i; + unsigned int i; int ret = 0; for (i = 0; i < num_descs; i++) { @@ -260,7 +271,8 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev, /** * gpio_to_pin() - GPIO range GPIO number to pin number translation * @range: GPIO range used for the translation - * @gpio: gpio pin to translate to a pin number + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * Finds the pin number for a given GPIO using the specified GPIO range * as a base for translation. The distinction between linear GPIO ranges @@ -271,25 +283,27 @@ static int pinctrl_register_pins(struct pinctrl_dev *pctldev, * result of successful pinctrl_get_device_gpio_range calls)! */ static inline int gpio_to_pin(struct pinctrl_gpio_range *range, - unsigned int gpio) + struct gpio_chip *gc, unsigned int offset) { - unsigned int offset = gpio - range->base; + unsigned int pin = gc->base + offset - range->base; if (range->pins) - return range->pins[offset]; + return range->pins[pin]; else - return range->pin_base + offset; + return range->pin_base + pin; } /** * pinctrl_match_gpio_range() - check if a certain GPIO pin is in range * @pctldev: pin controller device to check - * @gpio: gpio pin to check taken from the global GPIO pin space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * Tries to match a GPIO pin number to the ranges handled by a certain pin * controller, return the range or NULL */ static struct pinctrl_gpio_range * -pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio) +pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, struct gpio_chip *gc, + unsigned int offset) { struct pinctrl_gpio_range *range; @@ -297,8 +311,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio) /* Loop over the ranges */ list_for_each_entry(range, &pctldev->gpio_ranges, node) { /* Check if we're in the valid range */ - if (gpio >= range->base && - gpio < range->base + range->npins) { + if ((gc->base + offset) >= range->base && + (gc->base + offset) < range->base + range->npins) { mutex_unlock(&pctldev->mutex); return range; } @@ -310,7 +324,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio) /** * pinctrl_ready_for_gpio_range() - check if other GPIO pins of * the same GPIO chip are in range - * @gpio: gpio pin to check taken from the global GPIO pin space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * This function is complement of pinctrl_match_gpio_range(). If the return * value of pinctrl_match_gpio_range() is NULL, this function could be used @@ -321,14 +336,11 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio) * is false, it means that pinctrl device may not be ready. */ #ifdef CONFIG_GPIOLIB -static bool pinctrl_ready_for_gpio_range(unsigned gpio) +static bool pinctrl_ready_for_gpio_range(struct gpio_chip *gc, + unsigned int offset) { struct pinctrl_dev *pctldev; struct pinctrl_gpio_range *range = NULL; - struct gpio_chip *chip = gpio_to_chip(gpio); - - if (WARN(!chip, "no gpio_chip for gpio%i?", gpio)) - return false; mutex_lock(&pinctrldev_list_mutex); @@ -338,8 +350,8 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio) mutex_lock(&pctldev->mutex); list_for_each_entry(range, &pctldev->gpio_ranges, node) { /* Check if any gpio range overlapped with gpio chip */ - if (range->base + range->npins - 1 < chip->base || - range->base > chip->base + chip->ngpio - 1) + if (range->base + range->npins - 1 < gc->base || + range->base > gc->base + gc->ngpio - 1) continue; mutex_unlock(&pctldev->mutex); mutex_unlock(&pinctrldev_list_mutex); @@ -353,12 +365,17 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio) return false; } #else -static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; } +static inline bool +pinctrl_ready_for_gpio_range(struct gpio_chip *gc, unsigned int offset) +{ + return true; +} #endif /** * pinctrl_get_device_gpio_range() - find device for GPIO range - * @gpio: the pin to locate the pin controller for + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * @outdev: the pin control device if found * @outrange: the GPIO range if found * @@ -367,7 +384,8 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio) { return true; } * -EPROBE_DEFER if the GPIO range could not be found in any device since it * may still have not been registered. */ -static int pinctrl_get_device_gpio_range(unsigned gpio, +static int pinctrl_get_device_gpio_range(struct gpio_chip *gc, + unsigned int offset, struct pinctrl_dev **outdev, struct pinctrl_gpio_range **outrange) { @@ -379,7 +397,7 @@ static int pinctrl_get_device_gpio_range(unsigned gpio, list_for_each_entry(pctldev, &pinctrldev_list, node) { struct pinctrl_gpio_range *range; - range = pinctrl_match_gpio_range(pctldev, gpio); + range = pinctrl_match_gpio_range(pctldev, gc, offset); if (range) { *outdev = pctldev; *outrange = range; @@ -398,6 +416,10 @@ static int pinctrl_get_device_gpio_range(unsigned gpio, * @pctldev: pin controller device to add the range to * @range: the GPIO range to add * + * DEPRECATED: Don't use this function in new code. See section 2 of + * Documentation/devicetree/bindings/gpio/gpio.txt on how to bind pinctrl and + * gpio drivers. + * * This adds a range of GPIOs to be handled by a certain pin controller. Call * this to register handled ranges after registering your pin controller. */ @@ -412,7 +434,7 @@ EXPORT_SYMBOL_GPL(pinctrl_add_gpio_range); void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *ranges, - unsigned nranges) + unsigned int nranges) { int i; @@ -433,9 +455,9 @@ struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname, * it has not probed yet, so the driver trying to register this * range need to defer probing. */ - if (!pctldev) { + if (!pctldev) return ERR_PTR(-EPROBE_DEFER); - } + pinctrl_add_gpio_range(pctldev, range); return pctldev; @@ -443,7 +465,7 @@ struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname, EXPORT_SYMBOL_GPL(pinctrl_find_and_add_gpio_range); int pinctrl_get_group_pins(struct pinctrl_dev *pctldev, const char *pin_group, - const unsigned **pins, unsigned *num_pins) + const unsigned int **pins, unsigned int *num_pins) { const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; int gs; @@ -543,7 +565,7 @@ const char *pinctrl_generic_get_group_name(struct pinctrl_dev *pctldev, if (!group) return NULL; - return group->name; + return group->grp.name; } EXPORT_SYMBOL_GPL(pinctrl_generic_get_group_name); @@ -569,8 +591,8 @@ int pinctrl_generic_get_group_pins(struct pinctrl_dev *pctldev, return -EINVAL; } - *pins = group->pins; - *num_pins = group->num_pins; + *pins = group->grp.pins; + *num_pins = group->grp.npins; return 0; } @@ -626,10 +648,10 @@ static int pinctrl_generic_group_name_to_selector(struct pinctrl_dev *pctldev, * Note that the caller must take care of locking. */ int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name, - int *pins, int num_pins, void *data) + const unsigned int *pins, int num_pins, void *data) { struct group_desc *group; - int selector; + int selector, error; if (!name) return -EINVAL; @@ -644,12 +666,11 @@ int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name, if (!group) return -ENOMEM; - group->name = name; - group->pins = pins; - group->num_pins = num_pins; - group->data = data; + *group = PINCTRL_GROUP_DESC(name, pins, num_pins, data); - radix_tree_insert(&pctldev->pin_group_tree, selector, group); + error = radix_tree_insert(&pctldev->pin_group_tree, selector, group); + if (error) + return error; pctldev->num_groups++; @@ -716,8 +737,8 @@ int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, const char *pin_group) { const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; - unsigned ngroups = pctlops->get_groups_count(pctldev); - unsigned group_selector = 0; + unsigned int ngroups = pctlops->get_groups_count(pctldev); + unsigned int group_selector = 0; while (group_selector < ngroups) { const char *gname = pctlops->get_group_name(pctldev, @@ -739,7 +760,7 @@ int pinctrl_get_group_selector(struct pinctrl_dev *pctldev, return -EINVAL; } -bool pinctrl_gpio_can_use_line(unsigned gpio) +bool pinctrl_gpio_can_use_line(struct gpio_chip *gc, unsigned int offset) { struct pinctrl_dev *pctldev; struct pinctrl_gpio_range *range; @@ -751,13 +772,13 @@ bool pinctrl_gpio_can_use_line(unsigned gpio) * we're probably dealing with GPIO driver * without a backing pin controller - bail out. */ - if (pinctrl_get_device_gpio_range(gpio, &pctldev, &range)) + if (pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range)) return true; mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio_to_pin(range, gpio); + pin = gpio_to_pin(range, gc, offset); result = pinmux_can_be_used_for_gpio(pctldev, pin); @@ -769,22 +790,22 @@ EXPORT_SYMBOL_GPL(pinctrl_gpio_can_use_line); /** * pinctrl_gpio_request() - request a single pin to be used as GPIO - * @gpio: the GPIO pin number from the GPIO subsystem number space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * This function should *ONLY* be used from gpiolib-based GPIO drivers, * as part of their gpio_request() semantics, platforms and individual drivers * shall *NOT* request GPIO pins to be muxed in. */ -int pinctrl_gpio_request(unsigned gpio) +int pinctrl_gpio_request(struct gpio_chip *gc, unsigned int offset) { - struct pinctrl_dev *pctldev; struct pinctrl_gpio_range *range; - int ret; - int pin; + struct pinctrl_dev *pctldev; + int ret, pin; - ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); + ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range); if (ret) { - if (pinctrl_ready_for_gpio_range(gpio)) + if (pinctrl_ready_for_gpio_range(gc, offset)) ret = 0; return ret; } @@ -792,9 +813,9 @@ int pinctrl_gpio_request(unsigned gpio) mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio_to_pin(range, gpio); + pin = gpio_to_pin(range, gc, offset); - ret = pinmux_request_gpio(pctldev, range, pin, gpio); + ret = pinmux_request_gpio(pctldev, range, pin, gc->base + offset); mutex_unlock(&pctldev->mutex); @@ -804,27 +825,27 @@ EXPORT_SYMBOL_GPL(pinctrl_gpio_request); /** * pinctrl_gpio_free() - free control on a single pin, currently used as GPIO - * @gpio: the GPIO pin number from the GPIO subsystem number space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * This function should *ONLY* be used from gpiolib-based GPIO drivers, - * as part of their gpio_free() semantics, platforms and individual drivers - * shall *NOT* request GPIO pins to be muxed out. + * as part of their gpio_request() semantics, platforms and individual drivers + * shall *NOT* request GPIO pins to be muxed in. */ -void pinctrl_gpio_free(unsigned gpio) +void pinctrl_gpio_free(struct gpio_chip *gc, unsigned int offset) { - struct pinctrl_dev *pctldev; struct pinctrl_gpio_range *range; - int ret; - int pin; + struct pinctrl_dev *pctldev; + int ret, pin; - ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); - if (ret) { + ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range); + if (ret) return; - } + mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio_to_pin(range, gpio); + pin = gpio_to_pin(range, gc, offset); pinmux_free_gpio(pctldev, pin, range); @@ -832,14 +853,15 @@ void pinctrl_gpio_free(unsigned gpio) } EXPORT_SYMBOL_GPL(pinctrl_gpio_free); -static int pinctrl_gpio_direction(unsigned gpio, bool input) +static int pinctrl_gpio_direction(struct gpio_chip *gc, unsigned int offset, + bool input) { struct pinctrl_dev *pctldev; struct pinctrl_gpio_range *range; int ret; int pin; - ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); + ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range); if (ret) { return ret; } @@ -847,7 +869,7 @@ static int pinctrl_gpio_direction(unsigned gpio, bool input) mutex_lock(&pctldev->mutex); /* Convert to the pin controllers number space */ - pin = gpio_to_pin(range, gpio); + pin = gpio_to_pin(range, gc, offset); ret = pinmux_gpio_direction(pctldev, range, pin, input); mutex_unlock(&pctldev->mutex); @@ -857,54 +879,58 @@ static int pinctrl_gpio_direction(unsigned gpio, bool input) /** * pinctrl_gpio_direction_input() - request a GPIO pin to go into input mode - * @gpio: the GPIO pin number from the GPIO subsystem number space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * This function should *ONLY* be used from gpiolib-based GPIO drivers, * as part of their gpio_direction_input() semantics, platforms and individual * drivers shall *NOT* touch pin control GPIO calls. */ -int pinctrl_gpio_direction_input(unsigned gpio) +int pinctrl_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) { - return pinctrl_gpio_direction(gpio, true); + return pinctrl_gpio_direction(gc, offset, true); } EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_input); /** * pinctrl_gpio_direction_output() - request a GPIO pin to go into output mode - * @gpio: the GPIO pin number from the GPIO subsystem number space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * * This function should *ONLY* be used from gpiolib-based GPIO drivers, * as part of their gpio_direction_output() semantics, platforms and individual * drivers shall *NOT* touch pin control GPIO calls. */ -int pinctrl_gpio_direction_output(unsigned gpio) +int pinctrl_gpio_direction_output(struct gpio_chip *gc, unsigned int offset) { - return pinctrl_gpio_direction(gpio, false); + return pinctrl_gpio_direction(gc, offset, false); } EXPORT_SYMBOL_GPL(pinctrl_gpio_direction_output); /** * pinctrl_gpio_set_config() - Apply config to given GPIO pin - * @gpio: the GPIO pin number from the GPIO subsystem number space + * @gc: GPIO chip structure from the GPIO subsystem + * @offset: hardware offset of the GPIO relative to the controller * @config: the configuration to apply to the GPIO * * This function should *ONLY* be used from gpiolib-based GPIO drivers, if * they need to call the underlying pin controller to change GPIO config * (for example set debounce time). */ -int pinctrl_gpio_set_config(unsigned gpio, unsigned long config) +int pinctrl_gpio_set_config(struct gpio_chip *gc, unsigned int offset, + unsigned long config) { unsigned long configs[] = { config }; struct pinctrl_gpio_range *range; struct pinctrl_dev *pctldev; int ret, pin; - ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); + ret = pinctrl_get_device_gpio_range(gc, offset, &pctldev, &range); if (ret) return ret; mutex_lock(&pctldev->mutex); - pin = gpio_to_pin(range, gpio); + pin = gpio_to_pin(range, gc, offset); ret = pinconf_set_config(pctldev, pin, configs, ARRAY_SIZE(configs)); mutex_unlock(&pctldev->mutex); @@ -1084,8 +1110,8 @@ static struct pinctrl *create_pinctrl(struct device *dev, * an -EPROBE_DEFER later, as that is the worst case. */ if (ret == -EPROBE_DEFER) { - pinctrl_free(p, false); mutex_unlock(&pinctrl_maps_mutex); + pinctrl_free(p, false); return ERR_PTR(ret); } } @@ -1231,6 +1257,20 @@ static void pinctrl_link_add(struct pinctrl_dev *pctldev, DL_FLAG_AUTOREMOVE_CONSUMER); } +static void pinctrl_cond_disable_mux_setting(struct pinctrl_state *state, + struct pinctrl_setting *target_setting) +{ + struct pinctrl_setting *setting; + + list_for_each_entry(setting, &state->settings, node) { + if (target_setting && (&setting->node == &target_setting->node)) + break; + + if (setting->type == PIN_MAP_TYPE_MUX_GROUP) + pinmux_disable_setting(setting); + } +} + /** * pinctrl_commit_state() - select/activate/program a pinctrl state to HW * @p: the pinctrl handle for the device that requests configuration @@ -1238,22 +1278,18 @@ static void pinctrl_link_add(struct pinctrl_dev *pctldev, */ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state) { - struct pinctrl_setting *setting, *setting2; - struct pinctrl_state *old_state = p->state; + struct pinctrl_setting *setting; + struct pinctrl_state *old_state = READ_ONCE(p->state); int ret; - if (p->state) { + if (old_state) { /* * For each pinmux setting in the old state, forget SW's record * of mux owner for that pingroup. Any pingroups which are * still owned by the new state will be re-acquired by the call * to pinmux_enable_setting() in the loop below. */ - list_for_each_entry(setting, &p->state->settings, node) { - if (setting->type != PIN_MAP_TYPE_MUX_GROUP) - continue; - pinmux_disable_setting(setting); - } + pinctrl_cond_disable_mux_setting(old_state, NULL); } p->state = NULL; @@ -1297,7 +1333,7 @@ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state) } if (ret < 0) { - goto unapply_new_state; + goto unapply_mux_setting; } /* Do not link hogs (circular dependency) */ @@ -1309,23 +1345,23 @@ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state) return 0; +unapply_mux_setting: + pinctrl_cond_disable_mux_setting(state, NULL); + goto restore_old_state; + unapply_new_state: dev_err(p->dev, "Error applying setting, reverse things back\n"); - list_for_each_entry(setting2, &state->settings, node) { - if (&setting2->node == &setting->node) - break; - /* - * All we can do here is pinmux_disable_setting. - * That means that some pins are muxed differently now - * than they were before applying the setting (We can't - * "unmux a pin"!), but it's not a big deal since the pins - * are free to be muxed by another apply_setting. - */ - if (setting2->type == PIN_MAP_TYPE_MUX_GROUP) - pinmux_disable_setting(setting2); - } + /* + * All we can do here is pinmux_disable_setting. + * That means that some pins are muxed differently now + * than they were before applying the setting (We can't + * "unmux a pin"!), but it's not a big deal since the pins + * are free to be muxed by another apply_setting. + */ + pinctrl_cond_disable_mux_setting(state, setting); +restore_old_state: /* There's no infinite recursive loop here because p->state is NULL */ if (old_state) pinctrl_select_state(p, old_state); @@ -1409,7 +1445,7 @@ EXPORT_SYMBOL_GPL(devm_pinctrl_put); * @num_maps: the number of maps in the mapping table */ int pinctrl_register_mappings(const struct pinctrl_map *maps, - unsigned num_maps) + unsigned int num_maps) { int i, ret; struct pinctrl_maps *maps_node; @@ -1495,6 +1531,35 @@ void pinctrl_unregister_mappings(const struct pinctrl_map *map) } EXPORT_SYMBOL_GPL(pinctrl_unregister_mappings); +static void devm_pinctrl_unregister_mappings(void *maps) +{ + pinctrl_unregister_mappings(maps); +} + +/** + * devm_pinctrl_register_mappings() - Resource managed pinctrl_register_mappings() + * @dev: device for which mappings are registered + * @maps: the pincontrol mappings table to register. Note the pinctrl-core + * keeps a reference to the passed in maps, so they should _not_ be + * marked with __initdata. + * @num_maps: the number of maps in the mapping table + * + * Returns: 0 on success, or negative errno on failure. + */ +int devm_pinctrl_register_mappings(struct device *dev, + const struct pinctrl_map *maps, + unsigned int num_maps) +{ + int ret; + + ret = pinctrl_register_mappings(maps, num_maps); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, devm_pinctrl_unregister_mappings, (void *)maps); +} +EXPORT_SYMBOL_GPL(devm_pinctrl_register_mappings); + /** * pinctrl_force_sleep() - turn a given controller device into sleep state * @pctldev: pin controller device @@ -1592,6 +1657,19 @@ int pinctrl_pm_select_default_state(struct device *dev) EXPORT_SYMBOL_GPL(pinctrl_pm_select_default_state); /** + * pinctrl_pm_select_init_state() - select init pinctrl state for PM + * @dev: device to select init state for + */ +int pinctrl_pm_select_init_state(struct device *dev) +{ + if (!dev->pins) + return 0; + + return pinctrl_select_bound_state(dev, dev->pins->init_state); +} +EXPORT_SYMBOL_GPL(pinctrl_pm_select_init_state); + +/** * pinctrl_pm_select_sleep_state() - select sleep pinctrl state for PM * @dev: device to select sleep state for */ @@ -1624,10 +1702,10 @@ static int pinctrl_pins_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev = s->private; const struct pinctrl_ops *ops = pctldev->desc->pctlops; - unsigned i, pin; + unsigned int i, pin; #ifdef CONFIG_GPIOLIB + struct gpio_device *gdev = NULL; struct pinctrl_gpio_range *range; - struct gpio_chip *chip; int gpio_num; #endif @@ -1648,20 +1726,35 @@ static int pinctrl_pins_show(struct seq_file *s, void *what) seq_printf(s, "pin %d (%s) ", pin, desc->name); #ifdef CONFIG_GPIOLIB + gdev = NULL; gpio_num = -1; list_for_each_entry(range, &pctldev->gpio_ranges, node) { - if ((pin >= range->pin_base) && - (pin < (range->pin_base + range->npins))) { - gpio_num = range->base + (pin - range->pin_base); - break; + if (range->pins != NULL) { + for (int i = 0; i < range->npins; ++i) { + if (range->pins[i] == pin) { + gpio_num = range->base + i; + break; + } + } + } else if ((pin >= range->pin_base) && + (pin < (range->pin_base + range->npins))) { + gpio_num = + range->base + (pin - range->pin_base); } + if (gpio_num != -1) + break; } if (gpio_num >= 0) - chip = gpio_to_chip(gpio_num); - else - chip = NULL; - if (chip) - seq_printf(s, "%u:%s ", gpio_num - chip->gpiodev->base, chip->label); + /* + * FIXME: gpio_num comes from the global GPIO numberspace. + * we need to get rid of the range->base eventually and + * get the descriptor directly from the gpio_chip. + */ + gdev = gpiod_to_gpio_device(gpio_to_desc(gpio_num)); + if (gdev) + seq_printf(s, "%u:%s ", + gpio_num - gpio_device_get_base(gdev), + gpio_device_get_label(gdev)); else seq_puts(s, "0:? "); #endif @@ -1683,7 +1776,7 @@ static int pinctrl_groups_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev = s->private; const struct pinctrl_ops *ops = pctldev->desc->pctlops; - unsigned ngroups, selector = 0; + unsigned int ngroups, selector = 0; mutex_lock(&pctldev->mutex); @@ -1691,8 +1784,8 @@ static int pinctrl_groups_show(struct seq_file *s, void *what) seq_puts(s, "registered pin groups:\n"); while (selector < ngroups) { - const unsigned *pins = NULL; - unsigned num_pins = 0; + const unsigned int *pins = NULL; + unsigned int num_pins = 0; const char *gname = ops->get_group_name(pctldev, selector); const char *pname; int ret = 0; @@ -1934,7 +2027,7 @@ static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev) static void pinctrl_init_debugfs(void) { debugfs_root = debugfs_create_dir("pinctrl", NULL); - if (IS_ERR(debugfs_root) || !debugfs_root) { + if (IS_ERR(debugfs_root)) { pr_warn("failed to create debugfs directory\n"); debugfs_root = NULL; return; @@ -1983,7 +2076,7 @@ static int pinctrl_check_ops(struct pinctrl_dev *pctldev) * @driver_data: private pin controller data for this pin controller */ static struct pinctrl_dev * -pinctrl_init_controller(struct pinctrl_desc *pctldesc, struct device *dev, +pinctrl_init_controller(const struct pinctrl_desc *pctldesc, struct device *dev, void *driver_data) { struct pinctrl_dev *pctldev; @@ -2053,6 +2146,15 @@ out_err: return ERR_PTR(ret); } +static void pinctrl_uninit_controller(struct pinctrl_dev *pctldev, + const struct pinctrl_desc *pctldesc) +{ + pinctrl_free_pindescs(pctldev, pctldesc->pins, + pctldesc->npins); + mutex_destroy(&pctldev->mutex); + kfree(pctldev); +} + static int pinctrl_claim_hogs(struct pinctrl_dev *pctldev) { pctldev->p = create_pinctrl(pctldev->dev, pctldev); @@ -2097,13 +2199,7 @@ int pinctrl_enable(struct pinctrl_dev *pctldev) error = pinctrl_claim_hogs(pctldev); if (error) { - dev_err(pctldev->dev, "could not claim hogs: %i\n", - error); - pinctrl_free_pindescs(pctldev, pctldev->desc->pins, - pctldev->desc->npins); - mutex_destroy(&pctldev->mutex); - kfree(pctldev); - + dev_err(pctldev->dev, "could not claim hogs: %i\n", error); return error; } @@ -2128,7 +2224,7 @@ EXPORT_SYMBOL_GPL(pinctrl_enable); * struct pinctrl_dev handle. To avoid issues later on, please use the * new pinctrl_register_and_init() below instead. */ -struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, +struct pinctrl_dev *pinctrl_register(const struct pinctrl_desc *pctldesc, struct device *dev, void *driver_data) { struct pinctrl_dev *pctldev; @@ -2139,8 +2235,10 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, return pctldev; error = pinctrl_enable(pctldev); - if (error) + if (error) { + pinctrl_uninit_controller(pctldev, pctldesc); return ERR_PTR(error); + } return pctldev; } @@ -2156,7 +2254,7 @@ EXPORT_SYMBOL_GPL(pinctrl_register); * Note that pinctrl_enable() still needs to be manually called after * this once the driver is ready. */ -int pinctrl_register_and_init(struct pinctrl_desc *pctldesc, +int pinctrl_register_and_init(const struct pinctrl_desc *pctldesc, struct device *dev, void *driver_data, struct pinctrl_dev **pctldev) { @@ -2247,7 +2345,7 @@ static int devm_pinctrl_dev_match(struct device *dev, void *res, void *data) * The pinctrl device will be automatically released when the device is unbound. */ struct pinctrl_dev *devm_pinctrl_register(struct device *dev, - struct pinctrl_desc *pctldesc, + const struct pinctrl_desc *pctldesc, void *driver_data) { struct pinctrl_dev **ptr, *pctldev; @@ -2281,7 +2379,7 @@ EXPORT_SYMBOL_GPL(devm_pinctrl_register); * The pinctrl device will be automatically released when the device is unbound. */ int devm_pinctrl_register_and_init(struct device *dev, - struct pinctrl_desc *pctldesc, + const struct pinctrl_desc *pctldesc, void *driver_data, struct pinctrl_dev **pctldev) { @@ -2319,7 +2417,7 @@ EXPORT_SYMBOL_GPL(devm_pinctrl_unregister); static int __init pinctrl_init(void) { - pr_info("initialized pinctrl subsystem\n"); + pr_debug("initialized pinctrl subsystem\n"); pinctrl_init_debugfs(); return 0; } |