diff options
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 4955a68d618..034b1ad38b3 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -28,6 +28,7 @@ #include <linux/pinctrl/machine.h> #include "core.h" #include "pinmux.h" +#include "pinconf.h" /* Global list of pin control devices */ static DEFINE_MUTEX(pinctrldev_list_mutex); @@ -101,6 +102,30 @@ struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin) } /** + * pin_get_from_name() - look up a pin number from a name + * @pctldev: the pin control device to lookup the pin on + * @name: the name of the pin to look up + */ +int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name) +{ + unsigned pin; + + /* The highest pin number need to be included in the loop, thus <= */ + for (pin = 0; pin <= pctldev->desc->maxpin; pin++) { + struct pin_desc *desc; + + desc = pin_desc_get(pctldev, pin); + /* Pin space may be sparse */ + if (desc == NULL) + continue; + if (desc->name && !strcmp(name, desc->name)) + return pin; + } + + return -EINVAL; +} + +/** * pin_is_valid() - check if pin exists on controller * @pctldev: the pin control device to check the pin on * @pin: pin to check, use the local pin controller index number @@ -160,6 +185,7 @@ static int pinctrl_register_one_pin(struct pinctrl_dev *pctldev, pindesc = kzalloc(sizeof(*pindesc), GFP_KERNEL); if (pindesc == NULL) return -ENOMEM; + spin_lock_init(&pindesc->lock); /* Set owner */ @@ -409,11 +435,15 @@ static int pinctrl_devices_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev; - seq_puts(s, "name [pinmux]\n"); + seq_puts(s, "name [pinmux] [pinconf]\n"); mutex_lock(&pinctrldev_list_mutex); list_for_each_entry(pctldev, &pinctrldev_list, node) { seq_printf(s, "%s ", pctldev->desc->name); if (pctldev->desc->pmxops) + seq_puts(s, "yes "); + else + seq_puts(s, "no "); + if (pctldev->desc->confops) seq_puts(s, "yes"); else seq_puts(s, "no"); @@ -492,6 +522,7 @@ static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev) debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO, device_root, pctldev, &pinctrl_gpioranges_ops); pinmux_init_device_debugfs(device_root, pctldev); + pinconf_init_device_debugfs(device_root, pctldev); } static void pinctrl_init_debugfs(void) @@ -548,6 +579,16 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, } } + /* If we're implementing pinconfig, check the ops for sanity */ + if (pctldesc->confops) { + ret = pinconf_check_ops(pctldesc->confops); + if (ret) { + pr_err("%s pin config ops lacks necessary functions\n", + pctldesc->name); + return NULL; + } + } + pctldev = kzalloc(sizeof(struct pinctrl_dev), GFP_KERNEL); if (pctldev == NULL) return NULL; |