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pinctrl: stmfx: update pinconf settings

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Alignment with kernel driver.

According to the following tab (coming from STMFX datasheet), updates
have to done in stmfx_pinctrl_conf_set function:

-"type" has to be set when "bias" is configured as "pull-up or pull-down"
-PIN_CONFIG_DRIVE_PUSH_PULL should only be used when gpio is configured as
 output. There is so no need to check direction.

  DIR | TYPE | PUPD | MFX GPIO configuration
  ----|------|------|---------------------------------------------------
  1   | 1    | 1    | OUTPUT open drain with internal pull-up resistor
  ----|------|------|---------------------------------------------------
  1   | 1    | 0    | OUTPUT open drain with internal pull-down resistor
  ----|------|------|---------------------------------------------------
  1   | 0    | 0/1  | OUTPUT push pull no pull
  ----|------|------|---------------------------------------------------
  0   | 1    | 1    | INPUT with internal pull-up resistor
  ----|------|------|---------------------------------------------------
  0   | 1    | 0    | INPUT with internal pull-down resistor
  ----|------|------|---------------------------------------------------
  0   | 0    | 1    | INPUT floating
  ----|------|------|---------------------------------------------------
  0   | 0    | 0    | analog (GPIO not used, default setting)

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2019-07-30 19:16:11 +02:00 • committed by Patrice Chotard
parent 7385826475
commit abee80d789
1 changed files with 10 additions and 10 deletions
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20
drivers/pinctrl/pinctrl-stmfx.c
View file

@ -231,23 +231,23 @@ static int stmfx_pinctrl_conf_set(struct udevice *dev, unsigned int pin,
switch (param) {
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_DRIVE_PUSH_PULL:
ret = stmfx_pinctrl_set_type(dev, pin, 0);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = stmfx_pinctrl_set_type(dev, pin, 1);
if (ret)
return ret;
ret = stmfx_pinctrl_set_pupd(dev, pin, 0);
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = stmfx_pinctrl_set_type(dev, pin, 1);
if (ret)
return ret;
ret = stmfx_pinctrl_set_pupd(dev, pin, 1);
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
if (dir == GPIOF_OUTPUT)
ret = stmfx_pinctrl_set_type(dev, pin, 1);
else
ret = stmfx_pinctrl_set_type(dev, pin, 0);
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
if (dir == GPIOF_OUTPUT)
ret = stmfx_pinctrl_set_type(dev, pin, 0);
else
ret = stmfx_pinctrl_set_type(dev, pin, 1);
ret = stmfx_pinctrl_set_type(dev, pin, 1);
break;
case PIN_CONFIG_OUTPUT:
ret = stmfx_gpio_direction_output(plat->gpio, pin, arg);