diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/core.h | 2 | ||||
| -rw-r--r-- | drivers/pinctrl/pinmux.c | 68 |
2 files changed, 69 insertions, 1 deletions
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h index 1cae3723bbed..5b3ff134d6db 100644 --- a/drivers/pinctrl/core.h +++ b/drivers/pinctrl/core.h @@ -126,6 +126,7 @@ struct pinctrl_setting { * @owner: The name of the entity owning the pin. Typically, this is the name * of the device that called pinctrl_get(). Alternatively, it may be the * name of the GPIO passed to pinctrl_request_gpio(). + * @mux_setting: The most recent selected mux setting for this pin, if any. */ struct pin_desc { struct pinctrl_dev *pctldev; @@ -135,6 +136,7 @@ struct pin_desc { #ifdef CONFIG_PINMUX unsigned usecount; const char *owner; + const struct pinctrl_setting_mux *mux_setting; #endif }; diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 4852ebe5712e..86e401754116 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -187,6 +187,7 @@ static const char *pin_free(struct pinctrl_dev *pctldev, int pin, owner = desc->owner; desc->owner = NULL; + desc->mux_setting = NULL; module_put(pctldev->owner); return owner; @@ -378,7 +379,34 @@ void pinmux_free_setting(struct pinctrl_setting const *setting) int pinmux_enable_setting(struct pinctrl_setting const *setting) { struct pinctrl_dev *pctldev = setting->pctldev; + const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; const struct pinmux_ops *ops = pctldev->desc->pmxops; + int ret; + const unsigned *pins; + unsigned num_pins; + int i; + struct pin_desc *desc; + + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); + if (ret) { + /* errors only affect debug data, so just warn */ + dev_warn(pctldev->dev, + "could not get pins for group selector %d\n", + setting->data.mux.group); + num_pins = 0; + } + + for (i = 0; i < num_pins; i++) { + desc = pin_desc_get(pctldev, pins[i]); + if (desc == NULL) { + dev_warn(pctldev->dev, + "could not get pin desc for pin %d\n", + pins[i]); + continue; + } + desc->mux_setting = &(setting->data.mux); + } return ops->enable(pctldev, setting->data.mux.func, setting->data.mux.group); @@ -387,7 +415,34 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting) void pinmux_disable_setting(struct pinctrl_setting const *setting) { struct pinctrl_dev *pctldev = setting->pctldev; + const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; const struct pinmux_ops *ops = pctldev->desc->pmxops; + int ret; + const unsigned *pins; + unsigned num_pins; + int i; + struct pin_desc *desc; + + ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, + &pins, &num_pins); + if (ret) { + /* errors only affect debug data, so just warn */ + dev_warn(pctldev->dev, + "could not get pins for group selector %d\n", + setting->data.mux.group); + num_pins = 0; + } + + for (i = 0; i < num_pins; i++) { + desc = pin_desc_get(pctldev, pins[i]); + if (desc == NULL) { + dev_warn(pctldev->dev, + "could not get pin desc for pin %d\n", + pins[i]); + continue; + } + desc->mux_setting = NULL; + } ops->disable(pctldev, setting->data.mux.func, setting->data.mux.group); } @@ -433,6 +488,8 @@ static int pinmux_functions_show(struct seq_file *s, void *what) static int pinmux_pins_show(struct seq_file *s, void *what) { struct pinctrl_dev *pctldev = s->private; + const struct pinctrl_ops *pctlops = pctldev->desc->pctlops; + const struct pinmux_ops *pmxops = pctldev->desc->pmxops; unsigned i, pin; seq_puts(s, "Pinmux settings per pin\n"); @@ -455,10 +512,19 @@ static int pinmux_pins_show(struct seq_file *s, void *what) !strcmp(desc->owner, pinctrl_dev_get_name(pctldev))) is_hog = true; - seq_printf(s, "pin %d (%s): %s%s\n", pin, + seq_printf(s, "pin %d (%s): %s%s", pin, desc->name ? desc->name : "unnamed", desc->owner ? desc->owner : "UNCLAIMED", is_hog ? " (HOG)" : ""); + + if (desc->mux_setting) + seq_printf(s, " function %s group %s\n", + pmxops->get_function_name(pctldev, + desc->mux_setting->func), + pctlops->get_group_name(pctldev, + desc->mux_setting->group)); + else + seq_printf(s, "\n"); } mutex_unlock(&pinctrl_mutex); |