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| author | Alexandre Torgue <alexandre.torgue@st.com> | 2019-07-25 13:16:56 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-08-05 12:14:30 +0200 |
| commit | a502b343ebd0eab38f3cb33fbb84011847cf5aac (patch) | |
| tree | 401f743fd4e1fcb2da51b0cbf64b83787e9afa7e /drivers/pinctrl/pinctrl-stmfx.c | |
| parent | 2f22e2028c03d95c47b077887297dfa068da2c8a (diff) | |
| download | linux-rpi-a502b343ebd0eab38f3cb33fbb84011847cf5aac.tar.gz linux-rpi-a502b343ebd0eab38f3cb33fbb84011847cf5aac.tar.bz2 linux-rpi-a502b343ebd0eab38f3cb33fbb84011847cf5aac.zip | |
pinctrl: stmfx: update pinconf settings
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>
Diffstat (limited to 'drivers/pinctrl/pinctrl-stmfx.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-stmfx.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c index d3332da35637..31b6e511670f 100644 --- a/drivers/pinctrl/pinctrl-stmfx.c +++ b/drivers/pinctrl/pinctrl-stmfx.c @@ -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_pupd(pctl, pin, 1); + ret = stmfx_pinconf_set_type(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); + ret = stmfx_pinconf_set_pupd(pctl, pin, 1); 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); + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + ret = stmfx_pinconf_set_type(pctl, pin, 1); if (ret) return ret; break; |