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pinctrl: stmfx: update pinconf settings

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According to the following tab (coming from STMFX datasheet), updates
have to done in stmfx_pinconf_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: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/1564053416-32192-1-git-send-email-amelie.delaunay@st.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexandre Torgue 2019-07-25 13:16:56 +02:00 committed by Linus Walleij
parent 2f22e2028c
commit a502b343eb
1 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/pinctrl/pinctrl-stmfx.c
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@ -296,29 +296,29 @@ static int stmfx_pinconf_set(struct pinctrl_dev *pctldev, 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_pinconf_set_type(pctl, pin, 0);
if (ret)
return ret;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = stmfx_pinconf_set_type(pctl, pin, 1);
if (ret)
return ret;
ret = stmfx_pinconf_set_pupd(pctl, pin, 0);
if (ret)
return ret;
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = stmfx_pinconf_set_type(pctl, pin, 1);
if (ret)
return ret;
ret = stmfx_pinconf_set_pupd(pctl, pin, 1);
if (ret)
return ret;
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
if (!dir)
ret = stmfx_pinconf_set_type(pctl, pin, 1);
else
ret = stmfx_pinconf_set_type(pctl, pin, 0);
if (ret)
return ret;
break;
case PIN_CONFIG_DRIVE_PUSH_PULL:
if (!dir)
ret = stmfx_pinconf_set_type(pctl, pin, 0);
else
ret = stmfx_pinconf_set_type(pctl, pin, 1);
ret = stmfx_pinconf_set_type(pctl, pin, 1);
if (ret)
return ret;
break;