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pinctrl: stm32: Add get_pin_name() ops

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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>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Patrice Chotard 2018-10-24 14:10:19 +02:00 committed by Tom Rini
parent 8f651ca60b
commit 4ff1c20b92
1 changed files with 46 additions and 0 deletions
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46
drivers/pinctrl/pinctrl_stm32.c
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@ -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
};