ARM: dts: sd_600eval: Fix eMMC lockup issue

This board locks up if we stress test the eMMC, as the regulator s4 is
unable to supply enough current for all the peripherials attached to it.
As this supply is wired up to most of the peripherials including DDR,
it resulted in such lockup.

This patch fixes this issue by setting s4 regulator correctly with
Auto power mode.

Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
[Srinivas Kandagatla: rewrote the change log]
Tested-by: Girish Sharma <girish.sharma@einfochips.com>
Signed-off-by: Parth Pancholi <parth.pancholi@einfochips.com>

diff --git a/arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts b/arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts
index beb85af41c949de7ff6e3e06c2f86c3e1dc89275..bf6457642776fc71f4e7ce33902c7c79bdae9370 100644 (file)
--- a/arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts
+++ b/arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts
@@ -1,6 +1,7 @@
 #include "qcom-apq8064-v2.0.dtsi"
 #include "qcom-apq8064-arrow-sd-600eval-pins.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/mfd/qcom-rpm.h>
 
 / {
        model = "Arrow Electronics, APQ8064 SD_600eval";
@@ -82,7 +83,8 @@
                                s4 {
                                        regulator-min-microvolt = <1800000>;
                                        regulator-max-microvolt = <1800000>;
-                                       qcom,switch-mode-frequency = <3200000>;
+                                       qcom,switch-mode-frequency = <1600000>;
+                                       qcom,force-mode = <QCOM_RPM_FORCE_MODE_AUTO>;
                                        bias-pull-down;
                                        regulator-always-on;
                                };