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-rw-r--r--drivers/pinctrl/core.h2
-rw-r--r--drivers/pinctrl/pinmux.c68
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);