diff options
| author | Niyas Sait <niyas.sait@linaro.org> | 2022-11-15 20:54:14 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2022-11-17 12:29:54 +0300 |
| commit | 196270c5d6f3cfabd609e6202858fbccec14691f (patch) | |
| tree | f434b279d13ac18c589a34dff5a51234aab2de34 /include/linux/pinctrl | |
| parent | 457ff9fb29d7b7f9ff670f3ad20d64bcebe07283 (diff) | |
| download | linux-196270c5d6f3cfabd609e6202858fbccec14691f.tar.xz | |
pinconf-generic: clarify pull up and pull down config values
PIN_CONFIG_BIAS_PULL_DOWN and PIN_CONFIG_BIAS_PULL_UP values can
be custom or an SI unit such as ohms
Signed-off-by: Niyas Sait <niyas.sait@linaro.org>
Link: https://lore.kernel.org/r/20221115175415.650690-3-niyas.sait@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/pinctrl')
| -rw-r--r-- | include/linux/pinctrl/pinconf-generic.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index 940fc4e9e17c..c9c10142657e 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -38,7 +38,8 @@ struct pinctrl_map; * impedance. * @PIN_CONFIG_BIAS_PULL_DOWN: the pin will be pulled down (usually with high * impedance to GROUND). If the argument is != 0 pull-down is enabled, - * if it is 0, pull-down is total, i.e. the pin is connected to GROUND. + * the value is interpreted by the driver and can be custom or an SI unit + * such as ohms. * @PIN_CONFIG_BIAS_PULL_PIN_DEFAULT: the pin will be pulled up or down based * on embedded knowledge of the controller hardware, like current mux * function. The pull direction and possibly strength too will normally @@ -49,7 +50,8 @@ struct pinctrl_map; * @PIN_CONFIG_BIAS_DISABLE. * @PIN_CONFIG_BIAS_PULL_UP: the pin will be pulled up (usually with high * impedance to VDD). If the argument is != 0 pull-up is enabled, - * if it is 0, pull-up is total, i.e. the pin is connected to VDD. + * the value is interpreted by the driver and can be custom or an SI unit + * such as ohms. * @PIN_CONFIG_DRIVE_OPEN_DRAIN: the pin will be driven with open drain (open * collector) which means it is usually wired with other output ports * which are then pulled up with an external resistor. Setting this |