diff options
| author | Andrew Chew <achew@nvidia.com> | 2014-02-10 16:44:18 -0800 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2014-11-12 20:16:43 +0100 |
| commit | 7f0cb159994985dffe76ff034aae5a844386b447 (patch) | |
| tree | baa2a38b2b123df06562340ff643191ab771e2bc /src/mainboard | |
| parent | 372a5bbd66cb247abed173685d4a6fe0a3188246 (diff) | |
tegra124: Program PWM1 to drive panel backlight
Repurpose config->pwm to mean the particular PWM device (we use PWM1 on
nyan), and add code to program the PWM device.
BUG=none
TEST=emerge-nyan chromeos-coreboot-nyan, regenerate bootimage, and boot.
See that the backlight comes up in the bootloader, and brightness can be
adjusted via pwm_bl driver in the kernel.
Original-Change-Id: I2db047e5ef23c0e8fb66dd05ad6339d60918d493
Original-Signed-off-by: Andrew Chew <achew@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/185772
Original-Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
(cherry picked from commit 0dee98dd0c8510ecd630b5c6cb9ea49724dc8b55)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ie53610f3afa30b2d8f484685fb0e8c0b12cd8241
Reviewed-on: http://review.coreboot.org/7402
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/nyan/devicetree.cb | 2 | ||||
| -rw-r--r-- | src/mainboard/google/nyan_big/devicetree.cb | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/src/mainboard/google/nyan/devicetree.cb b/src/mainboard/google/nyan/devicetree.cb index 58945568e9..5ae86913d1 100644 --- a/src/mainboard/google/nyan/devicetree.cb +++ b/src/mainboard/google/nyan/devicetree.cb @@ -38,7 +38,7 @@ chip soc/nvidia/tegra124 register "lvds_shutdown_gpio" = "0" register "backlight_vdd_gpio" = "GPIO(P2)" register "panel_vdd_gpio" = "0" - register "pwm" = "GPIO(H1)" + register "pwm" = "1" # taken from u-boot; these look wrong however. register "vdd_delay" = "400" diff --git a/src/mainboard/google/nyan_big/devicetree.cb b/src/mainboard/google/nyan_big/devicetree.cb index cb55b72b93..9541ce9c9d 100644 --- a/src/mainboard/google/nyan_big/devicetree.cb +++ b/src/mainboard/google/nyan_big/devicetree.cb @@ -38,7 +38,7 @@ chip soc/nvidia/tegra124 register "lvds_shutdown_gpio" = "0" register "backlight_vdd_gpio" = "GPIO(P2)" register "panel_vdd_gpio" = "0" - register "pwm" = "GPIO(H1)" + register "pwm" = "1" # taken from u-boot; these look wrong however. register "vdd_delay" = "400" |