On 04/22/2014 01:58 PM, Nishanth Menon wrote:
On 04/22/2014 01:52 PM, Dave Gerlach wrote:
The VTT regulator for DDR3 termination on the am437x-gp-evm is
controlled by a gpio. It is configured by the bootloader so here we
define an always-on, fixed voltage regulator to hold the gpio.
Signed-off-by: Dave Gerlach <[email protected]>
---
arch/arm/boot/dts/am437x-gp-evm.dts | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts
b/arch/arm/boot/dts/am437x-gp-evm.dts
index a055f7f..e68d12c 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -27,6 +27,17 @@
enable-active-high;
};
+ vtt_fixed: fixedregulator-vtt {
Would you like to consider any explicit pinctrl here?
Yes, it's a good idea for me to add that in for next version.
+ compatible = "regulator-fixed";
+ regulator-name = "vtt_fixed";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ regulator-boot-on;
+ enable-active-high;
+ gpio = <&gpio5 7 GPIO_ACTIVE_HIGH>;
+ };
+
backlight {
compatible = "pwm-backlight";
pwms = <&ecap0 0 50000 PWM_POLARITY_INVERTED>;
Do we still need https://patchwork.kernel.org/patch/3871201/ (prevent
hwmod from resetting GPIO5) ?
Yes, without preventing the reset boot still hangs.
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