releases/4.9.30/arm-dts-imx6sx-sdb-remove-opp-override.patch

   1 From d8581c7c8be172dac156a19d261f988a72ce596f Mon Sep 17 00:00:00 2001
   2 From: Leonard Crestez <leonard.crestez@nxp.com>
   3 Date: Fri, 5 May 2017 14:00:17 +0300
   4 Subject: ARM: dts: imx6sx-sdb: Remove OPP override
   5
   6 From: Leonard Crestez <leonard.crestez@nxp.com>
   7
   8 commit d8581c7c8be172dac156a19d261f988a72ce596f upstream.
   9
  10 The board file for imx6sx-sdb overrides cpufreq operating points to use
  11 higher voltages. This is done because the board has a shared rail for
  12 VDD_ARM_IN and VDD_SOC_IN and when using LDO bypass the shared voltage
  13 needs to be a value suitable for both ARM and SOC.
  14
  15 This only applies to LDO bypass mode, a feature not present in upstream.
  16 When LDOs are enabled the effect is to use higher voltages than necessary
  17 for no good reason.
  18
  19 Setting these higher voltages can make some boards fail to boot with ugly
  20 semi-random crashes reminiscent of memory corruption. These failures only
  21 happen on board rev. C, rev. B is reported to still work.
  22
  23 Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
  24 Fixes: 54183bd7f766 ("ARM: imx6sx-sdb: add revb board and make it default")
  25 Signed-off-by: Shawn Guo <shawnguo@kernel.org>
  26 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  27
  28 ---
  29  arch/arm/boot/dts/imx6sx-sdb.dts |   17 -----------------
  30  1 file changed, 17 deletions(-)
  31
  32 --- a/arch/arm/boot/dts/imx6sx-sdb.dts
  33 +++ b/arch/arm/boot/dts/imx6sx-sdb.dts
  34 @@ -12,23 +12,6 @@
  35         model = "Freescale i.MX6 SoloX SDB RevB Board";
  36  };
  37
  38 -&cpu0 {
  39 -       operating-points = <
  40 -               /* kHz    uV */
  41 -               996000  1250000
  42 -               792000  1175000
  43 -               396000  1175000
  44 -               198000  1175000
  45 -               >;
  46 -       fsl,soc-operating-points = <
  47 -               /* ARM kHz      SOC uV */
  48 -               996000  1250000
  49 -               792000  1175000
  50 -               396000  1175000
  51 -               198000  1175000
  52 -       >;
  53 -};
  54 -
  55  &i2c1 {
  56         clock-frequency = <100000>;
  57         pinctrl-names = "default";