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| author | Igor Grinberg <grinberg@compulab.co.il> | 2013-11-08 01:03:52 +0200 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-11-25 10:41:52 -0500 |
| commit | 9dfdcdfed4726f94fc38d94f29f8214f38058576 (patch) | |
| tree | 7f621f7ada71e5ee3aad125245e52633e938d2e0 /README | |
| parent | 6516f81b64c71ab2be61f304d0e13dd84f730484 (diff) | |
| download | u-boot-imx-9dfdcdfed4726f94fc38d94f29f8214f38058576.zip u-boot-imx-9dfdcdfed4726f94fc38d94f29f8214f38058576.tar.gz u-boot-imx-9dfdcdfed4726f94fc38d94f29f8214f38058576.tar.bz2 | |
gpio_led: add support for inverted polarity
Some GPIO connected LEDs have inverted polarity.
Introduce new config option: CONFIG_GPIO_LED_INVERTED_TABLE for the
specifying the inverted GPIO LEDs list and add support for this in the
gpio_led driver.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Tested-by: Ilya Ledvich <ilya@compulab.co.il>
Diffstat (limited to 'README')
| -rw-r--r-- | README | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -1971,6 +1971,13 @@ CBFS (Coreboot Filesystem) support status LED backend implementation. Define CONFIG_GPIO_LED to include the gpio_led driver in the U-Boot binary. + CONFIG_GPIO_LED_INVERTED_TABLE + Some GPIO connected LEDs may have inverted polarity in which + case the GPIO high value corresponds to LED off state and + GPIO low value corresponds to LED on state. + In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined + with a list of GPIO LEDs that have inverted polarity. + - CAN Support: CONFIG_CAN_DRIVER Defining CONFIG_CAN_DRIVER enables CAN driver support |