Add get_pin_name ops to obtain a pin name given a pin index of a specified pin-controller.
Signed-off-by: Patrice Chotard patrice.chotard@st.com ---
Changes in v4: - Use define PINNAME_SIZE from include/dm/pinctrl.h instead of driver's local one
Changes in v3: None Changes in v2: None
drivers/pinctrl/pinctrl_stm32.c | 46 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+)
diff --git a/drivers/pinctrl/pinctrl_stm32.c b/drivers/pinctrl/pinctrl_stm32.c index 27ee2a4bffdb..69bfa67f71a6 100644 --- a/drivers/pinctrl/pinctrl_stm32.c +++ b/drivers/pinctrl/pinctrl_stm32.c @@ -25,6 +25,9 @@ struct stm32_gpio_bank { struct list_head list; };
+#define MAX_PIN_PER_BANK 16 + +static char pin_name[PINNAME_SIZE]; static int stm32_pinctrl_get_pins_count(struct udevice *dev) { struct stm32_pinctrl_priv *priv = dev_get_priv(dev); @@ -51,6 +54,48 @@ static int stm32_pinctrl_get_pins_count(struct udevice *dev) return priv->pinctrl_ngpios; }
+static struct udevice *stm32_pinctrl_get_gpio_dev(struct udevice *dev, + unsigned int selector) +{ + struct stm32_pinctrl_priv *priv = dev_get_priv(dev); + struct stm32_gpio_bank *gpio_bank; + struct gpio_dev_priv *uc_priv; + int first_pin = 0; + + /* look up for the bank which owns the requested pin */ + list_for_each_entry(gpio_bank, &priv->gpio_dev, list) { + uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev); + + if (selector < (first_pin + uc_priv->gpio_count)) + /* we found the bank */ + return gpio_bank->gpio_dev; + + first_pin += uc_priv->gpio_count; + } + + return NULL; +} + +static const char *stm32_pinctrl_get_pin_name(struct udevice *dev, + unsigned int selector) +{ + struct gpio_dev_priv *uc_priv; + struct udevice *gpio_dev; + + /* look up for the bank which owns the requested pin */ + gpio_dev = stm32_pinctrl_get_gpio_dev(dev, selector); + if (!gpio_dev) { + snprintf(pin_name, PINNAME_SIZE, "Error"); + } else { + uc_priv = dev_get_uclass_priv(gpio_dev); + + snprintf(pin_name, PINNAME_SIZE, "%s%d", + uc_priv->bank_name, + selector % MAX_PIN_PER_BANK); + } + + return pin_name; +} int stm32_pinctrl_probe(struct udevice *dev) { struct stm32_pinctrl_priv *priv = dev_get_priv(dev); @@ -256,6 +301,7 @@ static struct pinctrl_ops stm32_pinctrl_ops = { .set_state_simple = stm32_pinctrl_set_state_simple, #endif /* PINCTRL_FULL */ #ifndef CONFIG_SPL_BUILD + .get_pin_name = stm32_pinctrl_get_pin_name, .get_pins_count = stm32_pinctrl_get_pins_count, #endif };