diff options
| -rw-r--r-- | Documentation/pinctrl.txt | 8 | ||||
| -rw-r--r-- | arch/arm/mach-u300/core.c | 6 | ||||
| -rw-r--r-- | drivers/pinctrl/core.c | 145 | ||||
| -rw-r--r-- | drivers/pinctrl/core.h | 4 | ||||
| -rw-r--r-- | include/linux/pinctrl/machine.h | 13 | ||||
| -rw-r--r-- | include/linux/pinctrl/pinctrl.h | 2 |
6 files changed, 26 insertions, 152 deletions
diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt index 5e314ce..6fe3232 100644 --- a/Documentation/pinctrl.txt +++ b/Documentation/pinctrl.txt @@ -814,7 +814,7 @@ it even more compact which assumes you want to use pinctrl-foo and position 0 for mapping, for example: static struct pinctrl_map __initdata mapping[] = { - PIN_MAP("I2CMAP", "pinctrl-foo", "i2c0", "foo-i2c.0"), + PIN_MAP(PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", "foo-i2c.0"), }; @@ -930,7 +930,7 @@ foo_probe() /* Allocate a state holder named "state" etc */ struct pinctrl p; - p = pinctrl_get(&device, NULL); + p = pinctrl_get(&device, PINCTRL_STATE_DEFAULT); if IS_ERR(p) return PTR_ERR(p); pinctrl_enable(p); @@ -989,7 +989,7 @@ of the pin controller itself, like this: { .dev_name = "pinctrl-foo", - .name = "POWERMAP" + .name = PINCTRL_STATE_DEFAULT, .ctrl_dev_name = "pinctrl-foo", .function = "power_func", }, @@ -998,7 +998,7 @@ Since it may be common to request the core to hog a few always-applicable mux settings on the primary pin controller, there is a convenience macro for this: -PIN_MAP_PRIMARY_SYS_HOG("POWERMAP", "pinctrl-foo", "power_func") +PIN_MAP_SYS_HOG("pinctrl-foo", "power_func") This gives the exact same result as the above construction. diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index 030b2c0..ea6c790 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -1608,9 +1608,9 @@ static struct platform_device dma_device = { /* Pinmux settings */ static struct pinctrl_map __initdata u300_pinmux_map[] = { /* anonymous maps for chip power and EMIFs */ - PIN_MAP_SYS_HOG("POWER", "pinctrl-u300", "power"), - PIN_MAP_SYS_HOG("EMIF0", "pinctrl-u300", "emif0"), - PIN_MAP_SYS_HOG("EMIF1", "pinctrl-u300", "emif1"), + PIN_MAP_SYS_HOG("pinctrl-u300", "power"), + PIN_MAP_SYS_HOG("pinctrl-u300", "emif0"), + PIN_MAP_SYS_HOG("pinctrl-u300", "emif1"), /* per-device maps for MMC/SD, SPI and UART */ PIN_MAP("MMCSD", "pinctrl-u300", "mmc0", "mmci"), PIN_MAP("SPI", "pinctrl-u300", "spi0", "pl022"), diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 376cede..f25307b 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -44,18 +44,6 @@ struct pinctrl_maps { unsigned num_maps; }; -/** - * struct pinctrl_hog - a list item to stash control hogs - * @node: pin control hog list node - * @map: map entry responsible for this hogging - * @pmx: the pin control hogged by this item - */ -struct pinctrl_hog { - struct list_head node; - struct pinctrl_map const *map; - struct pinctrl *p; -}; - /* Global list of pin control devices */ static DEFINE_MUTEX(pinctrldev_list_mutex); static LIST_HEAD(pinctrldev_list); @@ -702,103 +690,6 @@ int pinctrl_register_mappings(struct pinctrl_map const *maps, return 0; } -/* Hog a single map entry and add to the hoglist */ -static int pinctrl_hog_map(struct pinctrl_dev *pctldev, - struct pinctrl_map const *map) -{ - struct pinctrl_hog *hog; - struct pinctrl *p; - int ret; - - hog = kzalloc(sizeof(*hog), GFP_KERNEL); - if (!hog) { - dev_err(pctldev->dev, "failed to alloc struct pinctrl_hog\n"); - return -ENOMEM; - } - - p = pinctrl_get_locked(pctldev->dev, map->name); - if (IS_ERR(p)) { - kfree(hog); - dev_err(pctldev->dev, - "could not get the %s pin control mapping for hogging\n", - map->name); - return PTR_ERR(p); - } - - ret = pinctrl_enable(p); - if (ret) { - pinctrl_put(p); - kfree(hog); - dev_err(pctldev->dev, - "could not enable the %s pin control mapping for hogging\n", - map->name); - return ret; - } - - hog->map = map; - hog->p = p; - - dev_info(pctldev->dev, "hogged map %s, function %s\n", map->name, - map->function); - list_add_tail(&hog->node, &pctldev->pinctrl_hogs); - - return 0; -} - -/** - * pinctrl_hog_maps() - hog specific map entries on controller device - * @pctldev: the pin control device to hog entries on - * - * When the pin controllers are registered, there may be some specific pinmux - * map entries that need to be hogged, i.e. get+enabled until the system shuts - * down. - */ -static int pinctrl_hog_maps(struct pinctrl_dev *pctldev) -{ - struct device *dev = pctldev->dev; - const char *devname = dev_name(dev); - int ret; - struct pinctrl_maps *maps_node; - int i; - struct pinctrl_map const *map; - - INIT_LIST_HEAD(&pctldev->pinctrl_hogs); - - mutex_lock(&pinctrl_maps_mutex); - for_each_maps(maps_node, i, map) { - if (!strcmp(map->ctrl_dev_name, devname) && - !strcmp(map->dev_name, devname)) { - /* OK time to hog! */ - ret = pinctrl_hog_map(pctldev, map); - if (ret) { - mutex_unlock(&pinctrl_maps_mutex); - return ret; - } - } - } - mutex_unlock(&pinctrl_maps_mutex); - - return 0; -} - -/** - * pinctrl_unhog_maps() - unhog specific map entries on controller device - * @pctldev: the pin control device to unhog entries on - */ -static void pinctrl_unhog_maps(struct pinctrl_dev *pctldev) -{ - struct list_head *node, *tmp; - - list_for_each_safe(node, tmp, &pctldev->pinctrl_hogs) { - struct pinctrl_hog *hog = - list_entry(node, struct pinctrl_hog, node); - pinctrl_disable(hog->p); - pinctrl_put(hog->p); - list_del(node); - kfree(hog); - } -} - #ifdef CONFIG_DEBUG_FS static int pinctrl_pins_show(struct seq_file *s, void *what) @@ -889,19 +780,6 @@ static int pinctrl_gpioranges_show(struct seq_file *s, void *what) return 0; } -static int pinmux_hogs_show(struct seq_file *s, void *what) -{ - struct pinctrl_dev *pctldev = s->private; - struct pinctrl_hog *hog; - - seq_puts(s, "Pin control map hogs held by device\n"); - - list_for_each_entry(hog, &pctldev->pinctrl_hogs, node) - seq_printf(s, "%s\n", hog->map->name); - - return 0; -} - static int pinctrl_devices_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev; @@ -988,11 +866,6 @@ static int pinctrl_gpioranges_open(struct inode *inode, struct file *file) return single_open(file, pinctrl_gpioranges_show, inode->i_private); } -static int pinmux_hogs_open(struct inode *inode, struct file *file) -{ - return single_open(file, pinmux_hogs_show, inode->i_private); -} - static int pinctrl_devices_open(struct inode *inode, struct file *file) { return single_open(file, pinctrl_devices_show, NULL); @@ -1029,13 +902,6 @@ static const struct file_operations pinctrl_gpioranges_ops = { .release = single_release, }; -static const struct file_operations pinmux_hogs_ops = { - .open = pinmux_hogs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - static const struct file_operations pinctrl_devices_ops = { .open = pinctrl_devices_open, .read = seq_read, @@ -1078,8 +944,6 @@ static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev) device_root, pctldev, &pinctrl_groups_ops); debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO, device_root, pctldev, &pinctrl_gpioranges_ops); - debugfs_create_file("pinmux-hogs", S_IFREG | S_IRUGO, - device_root, pctldev, &pinmux_hogs_ops); pinmux_init_device_debugfs(device_root, pctldev); pinconf_init_device_debugfs(device_root, pctldev); } @@ -1188,7 +1052,9 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, mutex_lock(&pinctrldev_list_mutex); list_add_tail(&pctldev->node, &pinctrldev_list); mutex_unlock(&pinctrldev_list_mutex); - pinctrl_hog_maps(pctldev); + pctldev->p = pinctrl_get(pctldev->dev, PINCTRL_STATE_DEFAULT); + if (!IS_ERR(pctldev->p)) + pinctrl_enable(pctldev->p); pinctrl_init_device_debugfs(pctldev); return pctldev; @@ -1211,7 +1077,10 @@ void pinctrl_unregister(struct pinctrl_dev *pctldev) return; pinctrl_remove_device_debugfs(pctldev); - pinctrl_unhog_maps(pctldev); + if (!IS_ERR(pctldev->p)) { + pinctrl_disable(pctldev->p); + pinctrl_put(pctldev->p); + } /* TODO: check that no pinmuxes are still active? */ mutex_lock(&pinctrldev_list_mutex); list_del(&pctldev->node); diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h index 8164e7b..97f8124 100644 --- a/drivers/pinctrl/core.h +++ b/drivers/pinctrl/core.h @@ -27,7 +27,7 @@ struct pinctrl_gpio_range; * @owner: module providing the pin controller, used for refcounting * @driver_data: driver data for drivers registering to the pin controller * subsystem - * @pinctrl_hogs: list of pin control maps hogged by this device + * @p: result of pinctrl_get() for this device * @device_root: debugfs root for this device */ struct pinctrl_dev { @@ -39,7 +39,7 @@ struct pinctrl_dev { struct device *dev; struct module *owner; void *driver_data; - struct list_head pinctrl_hogs; + struct pinctrl *p; #ifdef CONFIG_DEBUG_FS struct dentry *device_root; #endif diff --git a/include/linux/pinctrl/machine.h b/include/linux/pinctrl/machine.h index 73fbb27..20e9735 100644 --- a/include/linux/pinctrl/machine.h +++ b/include/linux/pinctrl/machine.h @@ -12,6 +12,8 @@ #ifndef __LINUX_PINCTRL_MACHINE_H #define __LINUX_PINCTRL_MACHINE_H +#include "pinctrl.h" + /** * struct pinctrl_map - boards/machines shall provide this map for devices * @dev_name: the name of the device using this specific mapping, the name @@ -49,17 +51,18 @@ struct pinctrl_map { * Convenience macro to map a system function onto a certain pinctrl device, * to be hogged by the pin control core until the system shuts down. */ -#define PIN_MAP_SYS_HOG(a, b, c) \ - { .name = a, .ctrl_dev_name = b, .dev_name = b, .function = c, } +#define PIN_MAP_SYS_HOG(a, b) \ + { .name = PINCTRL_STATE_DEFAULT, .ctrl_dev_name = a, .dev_name = a, \ + .function = b, } /* * Convenience macro to map a system function onto a certain pinctrl device * using a specified group, to be hogged by the pin control core until the * system shuts down. */ -#define PIN_MAP_SYS_HOG_GROUP(a, b, c, d) \ - { .name = a, .ctrl_dev_name = b, .dev_name = b, .function = c, \ - .group = d, } +#define PIN_MAP_SYS_HOG_GROUP(a, b, c) \ + { .name = PINCTRL_STATE_DEFAULT, .ctrl_dev_name = a, .dev_name = a, \ + .function = b, .group = c, } #ifdef CONFIG_PINMUX diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h index 8bd22ee..411fe23 100644 --- a/include/linux/pinctrl/pinctrl.h +++ b/include/linux/pinctrl/pinctrl.h @@ -19,6 +19,8 @@ #include <linux/list.h> #include <linux/seq_file.h> +#define PINCTRL_STATE_DEFAULT "default" + struct pinctrl_dev; struct pinmux_ops; struct pinconf_ops; |