On 12/06/16 05:47, Bjorn Andersson wrote:

On Fri 10 Jun 11:19 PDT 2016, Srinivas Kandagatla wrote:

quoted

From: Parth Pancholi <redacted>

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 <redacted>
[Srinivas Kandagatla: rewrote the change log]
Tested-by: Girish Sharma <redacted>
Signed-off-by: Parth Pancholi <redacted>

If I read the msm-3.4 tree correctly most (perhaps all) 8064 devices
should have this setup.

I agree, we should patch other boards as well with the same value.

Acked-by: Bjorn Andersson <redacted>

thanks,
srini

Regards,
Bjorn

quoted

---
  arch/arm/boot/dts/qcom-apq8064-arrow-sd-600eval.dts | 4 +++-
  1 file changed, 3 insertions(+), 1 deletion(-)

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 7df0108..39ae2bc 100644
--- 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;
  				};
--

2.8.3

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