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| author | Simon Glass <sjg@chromium.org> | 2016-01-21 19:43:26 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-01-21 20:42:34 -0700 |
| commit | 52db39a22b0544446e630c853292bfa255a21e24 (patch) | |
| tree | cc1360edc2d0167bd3262493f01976e7365d9850 | |
| parent | 0379597e55c17519be36fdf357d4463279da5aca (diff) | |
| download | u-boot-midas-52db39a22b0544446e630c853292bfa255a21e24.tar.gz u-boot-midas-52db39a22b0544446e630c853292bfa255a21e24.tar.bz2 u-boot-midas-52db39a22b0544446e630c853292bfa255a21e24.zip | |
dm: pinctrl: Add a function to parse PIN_CONFIG flags
Add a function which produces a flags word from a few common PIN_CONFIG
settings. This is useful for simple pinctrl drivers that don't need to worry
about drive strength, etc.
Signed-off-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | drivers/pinctrl/pinctrl-uclass.c | 12 | ||||
| -rw-r--r-- | include/dm/pinctrl.h | 13 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c index c42b312ddd..1acbfafa81 100644 --- a/drivers/pinctrl/pinctrl-uclass.c +++ b/drivers/pinctrl/pinctrl-uclass.c @@ -15,6 +15,18 @@ DECLARE_GLOBAL_DATA_PTR; +int pinctrl_decode_pin_config(const void *blob, int node) +{ + int flags = 0; + + if (fdtdec_get_bool(blob, node, "bias-pull-up")) + flags |= 1 << PIN_CONFIG_BIAS_PULL_UP; + else if (fdtdec_get_bool(blob, node, "bias-pull-down")) + flags |= 1 << PIN_CONFIG_BIAS_PULL_DOWN; + + return flags; +} + #if CONFIG_IS_ENABLED(PINCTRL_FULL) /** * pinctrl_config_one() - apply pinctrl settings for a single node diff --git a/include/dm/pinctrl.h b/include/dm/pinctrl.h index f6025f618e..5cd45038eb 100644 --- a/include/dm/pinctrl.h +++ b/include/dm/pinctrl.h @@ -284,4 +284,17 @@ int pinctrl_request_noflags(struct udevice *dev, int func); */ int pinctrl_get_periph_id(struct udevice *dev, struct udevice *periph); +/** + * pinctrl_decode_pin_config() - decode pin configuration flags + * + * This decodes some of the PIN_CONFIG values into flags, with each value + * being (1 << pin_cfg). This does not support things with values like the + * slew rate. + * + * @blob: Device tree blob + * @node: Node containing the PIN_CONFIG values + * @return decoded flag value, or -ve on error + */ +int pinctrl_decode_pin_config(const void *blob, int node); + #endif /* __PINCTRL_H */ |