Merge branch 'master' of git://git.denx.de/u-boot-mpc85xx

[karo-tx-uboot.git] / README

diff --git a/README b/README
index d6006f50180f7df3f16340046e7b5ad39f069601..265e81e041ec063f29e6c75830efb8a41322c972 100644 (file)
--- a/README
+++ b/README
@@ -1997,6 +1997,21 @@ CBFS (Coreboot Filesystem) support
                kernel). Defining CONFIG_STATUS_LED enables this
                feature in U-Boot.
 
+               Additional options:
+
+               CONFIG_GPIO_LED
+               The status LED can be connected to a GPIO pin.
+               In such cases, the gpio_led driver can be used as a
+               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