ARM: dts: omap4-panda: Fix DVI EDID reads

On Panda the +5V supply for DVI EDID is supplied by the
same regulator that poweres the USB Hub. Currently, the
DSS/DVI subsystem doesn't know how to manage this regulator
and so DVI EDID reads will fail if USB Hub is not enabled.

As a temporary fix we keep this regulator permanently enabled
on boot. This fixes the DVI EDID read problem.

CC: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi
index 60fc62489b7a..faa95b5b242e 100644
--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
@@ -85,6 +85,13 @@
                 gpio = <&gpio1 1 0>;    /* gpio_1 */
                 startup-delay-us = <70000>;
                 enable-active-high;
+                /*
+                 * boot-on is required along with always-on as the
+                 * regulator framework doesn't enable the regulator
+                 * if boot-on is not there.
+                 */
+                regulator-always-on;
+                regulator-boot-on;
         };
 
         /* HS USB Host PHY on PORT 1 */