diff options
Diffstat (limited to 'drivers/pinctrl/pinconf.c')
| -rw-r--r-- | drivers/pinctrl/pinconf.c | 107 |
1 files changed, 79 insertions, 28 deletions
diff --git a/drivers/pinctrl/pinconf.c b/drivers/pinctrl/pinconf.c index 3f018a1cc14b..e0a453790a40 100644 --- a/drivers/pinctrl/pinconf.c +++ b/drivers/pinctrl/pinconf.c @@ -64,15 +64,23 @@ int pin_config_get(const char *dev_name, const char *name, struct pinctrl_dev *pctldev; int pin; + mutex_lock(&pinctrl_mutex); + pctldev = get_pinctrl_dev_from_devname(dev_name); - if (!pctldev) - return -EINVAL; + if (!pctldev) { + pin = -EINVAL; + goto unlock; + } pin = pin_get_from_name(pctldev, name); if (pin < 0) - return pin; + goto unlock; - return pin_config_get_for_pin(pctldev, pin, config); + pin = pin_config_get_for_pin(pctldev, pin, config); + +unlock: + mutex_unlock(&pinctrl_mutex); + return pin; } EXPORT_SYMBOL(pin_config_get); @@ -110,17 +118,27 @@ int pin_config_set(const char *dev_name, const char *name, unsigned long config) { struct pinctrl_dev *pctldev; - int pin; + int pin, ret; + + mutex_lock(&pinctrl_mutex); pctldev = get_pinctrl_dev_from_devname(dev_name); - if (!pctldev) - return -EINVAL; + if (!pctldev) { + ret = -EINVAL; + goto unlock; + } pin = pin_get_from_name(pctldev, name); - if (pin < 0) - return pin; + if (pin < 0) { + ret = pin; + goto unlock; + } + + ret = pin_config_set_for_pin(pctldev, pin, config); - return pin_config_set_for_pin(pctldev, pin, config); +unlock: + mutex_unlock(&pinctrl_mutex); + return ret; } EXPORT_SYMBOL(pin_config_set); @@ -129,25 +147,36 @@ int pin_config_group_get(const char *dev_name, const char *pin_group, { struct pinctrl_dev *pctldev; const struct pinconf_ops *ops; - int selector; + int selector, ret; + + mutex_lock(&pinctrl_mutex); pctldev = get_pinctrl_dev_from_devname(dev_name); - if (!pctldev) - return -EINVAL; + if (!pctldev) { + ret = -EINVAL; + goto unlock; + } ops = pctldev->desc->confops; if (!ops || !ops->pin_config_group_get) { dev_err(pctldev->dev, "cannot get configuration for pin " "group, missing group config get function in " "driver\n"); - return -EINVAL; + ret = -EINVAL; + goto unlock; } selector = pinctrl_get_group_selector(pctldev, pin_group); - if (selector < 0) - return selector; + if (selector < 0) { + ret = selector; + goto unlock; + } - return ops->pin_config_group_get(pctldev, selector, config); + ret = ops->pin_config_group_get(pctldev, selector, config); + +unlock: + mutex_unlock(&pinctrl_mutex); + return ret; } EXPORT_SYMBOL(pin_config_group_get); @@ -163,27 +192,34 @@ int pin_config_group_set(const char *dev_name, const char *pin_group, int ret; int i; + mutex_lock(&pinctrl_mutex); + pctldev = get_pinctrl_dev_from_devname(dev_name); - if (!pctldev) - return -EINVAL; + if (!pctldev) { + ret = -EINVAL; + goto unlock; + } ops = pctldev->desc->confops; pctlops = pctldev->desc->pctlops; if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) { dev_err(pctldev->dev, "cannot configure pin group, missing " "config function in driver\n"); - return -EINVAL; + ret = -EINVAL; + goto unlock; } selector = pinctrl_get_group_selector(pctldev, pin_group); - if (selector < 0) - return selector; + if (selector < 0) { + ret = selector; + goto unlock; + } ret = pctlops->get_group_pins(pctldev, selector, &pins, &num_pins); if (ret) { dev_err(pctldev->dev, "cannot configure pin group, error " "getting pins\n"); - return ret; + goto unlock; } /* @@ -197,23 +233,30 @@ int pin_config_group_set(const char *dev_name, const char *pin_group, * pin-by-pin as well, it returns -EAGAIN. */ if (ret != -EAGAIN) - return ret; + goto unlock; } /* * If the controller cannot handle entire groups, we configure each pin * individually. */ - if (!ops->pin_config_set) - return 0; + if (!ops->pin_config_set) { + ret = 0; + goto unlock; + } for (i = 0; i < num_pins; i++) { ret = ops->pin_config_set(pctldev, pins[i], config); if (ret < 0) - return ret; + goto unlock; } - return 0; + ret = 0; + +unlock: + mutex_unlock(&pinctrl_mutex); + + return ret; } EXPORT_SYMBOL(pin_config_group_set); @@ -236,6 +279,8 @@ static int pinconf_pins_show(struct seq_file *s, void *what) seq_puts(s, "Pin config settings per pin\n"); seq_puts(s, "Format: pin (name): pinmux setting array\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; @@ -254,6 +299,8 @@ static int pinconf_pins_show(struct seq_file *s, void *what) seq_printf(s, "\n"); } + mutex_unlock(&pinctrl_mutex); + return 0; } @@ -280,6 +327,8 @@ static int pinconf_groups_show(struct seq_file *s, void *what) seq_puts(s, "Pin config settings per pin group\n"); seq_puts(s, "Format: group (name): pinmux setting array\n"); + mutex_lock(&pinctrl_mutex); + while (pctlops->list_groups(pctldev, selector) >= 0) { const char *gname = pctlops->get_group_name(pctldev, selector); @@ -290,6 +339,8 @@ static int pinconf_groups_show(struct seq_file *s, void *what) selector++; } + mutex_unlock(&pinctrl_mutex); + return 0; } |