[U-Boot] [PATCH 2/5] pinctrl: stm32: add information on pin configuration

[Patrick Delaunay]

Add information on pin configuration used for pinmux command:
- bias configuration for output (disable, pull up, pull down)
- otype for input (open drain or push pull)

Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---

 drivers/pinctrl/pinctrl_stm32.c | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/pinctrl_stm32.c b/drivers/pinctrl/pinctrl_stm32.c
index 3a235ae5a7..4511cd7a45 100644
--- a/drivers/pinctrl/pinctrl_stm32.c
+++ b/drivers/pinctrl/pinctrl_stm32.c
@@ -39,6 +39,17 @@ static const char * const pinmux_mode[PINMUX_MODE_COUNT] = {
        "alt function",
 };
 
+static const char * const pinmux_output[] = {
+       [STM32_GPIO_PUPD_NO] = "bias-disable",
+       [STM32_GPIO_PUPD_UP] = "bias-pull-up",
+       [STM32_GPIO_PUPD_DOWN] = "bias-pull-down",
+};
+
+static const char * const pinmux_input[] = {
+       [STM32_GPIO_OTYPE_PP] = "drive-push-pull",
+       [STM32_GPIO_OTYPE_OD] = "drive-open-drain",
+};
+
 static int stm32_pinctrl_get_af(struct udevice *dev, unsigned int offset)
 {
        struct stm32_gpio_priv *priv = dev_get_priv(dev);
@@ -176,10 +187,12 @@ static int stm32_pinctrl_get_pin_muxing(struct udevice 
*dev,
                                        int size)
 {
        struct udevice *gpio_dev;
+       struct stm32_gpio_priv *priv;
        const char *label;
        int mode;
        int af_num;
        unsigned int gpio_idx;
+       u32 pupd, otype;
 
        /* look up for the bank which owns the requested pin */
        gpio_dev = stm32_pinctrl_get_gpio_dev(dev, selector, &gpio_idx);
@@ -188,9 +201,9 @@ static int stm32_pinctrl_get_pin_muxing(struct udevice *dev,
                return -ENODEV;
 
        mode = gpio_get_raw_function(gpio_dev, gpio_idx, &label);
-
        dev_dbg(dev, "selector = %d gpio_idx = %d mode = %d\n",
                selector, gpio_idx, mode);
+       priv = dev_get_priv(gpio_dev);
 
 
        switch (mode) {
@@ -205,9 +218,17 @@ static int stm32_pinctrl_get_pin_muxing(struct udevice 
*dev,
                snprintf(buf, size, "%s %d", pinmux_mode[mode], af_num);
                break;
        case GPIOF_OUTPUT:
+               pupd = (readl(&priv->regs->pupdr) >> (gpio_idx * 2)) &
+                      PUPD_MASK;
+               snprintf(buf, size, "%s %s %s",
+                        pinmux_mode[mode], pinmux_output[pupd],
+                        label ? label : "");
+               break;
        case GPIOF_INPUT:
-               snprintf(buf, size, "%s %s",
-                        pinmux_mode[mode], label ? label : "");
+               otype = (readl(&priv->regs->otyper) >> gpio_idx) & OTYPE_MSK;
+               snprintf(buf, size, "%s %s %s",
+                        pinmux_mode[mode], pinmux_input[otype],
+                        label ? label : "");
                break;
        }
 
-- 
2.17.1

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