diff options
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
| -rw-r--r-- | drivers/pinctrl/pinmux.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index f409f161ea1d..7342c26f4246 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -19,8 +19,6 @@ #include <linux/radix-tree.h> #include <linux/err.h> #include <linux/list.h> -#include <linux/mutex.h> -#include <linux/spinlock.h> #include <linux/string.h> #include <linux/sysfs.h> #include <linux/debugfs.h> @@ -96,15 +94,12 @@ static int pin_request(struct pinctrl_dev *pctldev, goto out; } - spin_lock(&desc->lock); if (desc->owner && strcmp(desc->owner, owner)) { - spin_unlock(&desc->lock); dev_err(pctldev->dev, "pin already requested\n"); goto out; } desc->owner = owner; - spin_unlock(&desc->lock); /* Let each pin increase references to this module */ if (!try_module_get(pctldev->owner)) { @@ -131,11 +126,8 @@ static int pin_request(struct pinctrl_dev *pctldev, dev_err(pctldev->dev, "->request on device %s failed for pin %d\n", pctldev->desc->name, pin); out_free_pin: - if (status) { - spin_lock(&desc->lock); + if (status) desc->owner = NULL; - spin_unlock(&desc->lock); - } out: if (status) dev_err(pctldev->dev, "pin-%d (%s) status %d\n", @@ -178,10 +170,8 @@ static const char *pin_free(struct pinctrl_dev *pctldev, int pin, else if (ops->free) ops->free(pctldev, pin); - spin_lock(&desc->lock); owner = desc->owner; desc->owner = NULL; - spin_unlock(&desc->lock); module_put(pctldev->owner); return owner; @@ -580,6 +570,8 @@ static int pinmux_functions_show(struct seq_file *s, void *what) const struct pinmux_ops *pmxops = pctldev->desc->pmxops; unsigned func_selector = 0; + mutex_lock(&pinctrl_mutex); + while (pmxops->list_functions(pctldev, func_selector) >= 0) { const char *func = pmxops->get_function_name(pctldev, func_selector); @@ -600,9 +592,10 @@ static int pinmux_functions_show(struct seq_file *s, void *what) seq_puts(s, "]\n"); func_selector++; - } + mutex_unlock(&pinctrl_mutex); + return 0; } @@ -614,6 +607,8 @@ static int pinmux_pins_show(struct seq_file *s, void *what) seq_puts(s, "Pinmux settings per pin\n"); seq_puts(s, "Format: pin (name): owner\n"); + mutex_lock(&pinctrl_mutex); + /* The pin number can be retrived from the pin controller descriptor */ for (i = 0; i < pctldev->desc->npins; i++) { struct pin_desc *desc; @@ -635,6 +630,8 @@ static int pinmux_pins_show(struct seq_file *s, void *what) is_hog ? " (HOG)" : ""); } + mutex_unlock(&pinctrl_mutex); + return 0; } |