ARM: dts: imx6q-cm-fx6: fix the operation points

The current ldo settings of the cm-fx6 do not allow 1.2GHz cpu
frequency. At this frequency the module behaves unstable.

But the imx6q fuse indicates that 1.2GHz operation is possible.
Hence, remove the 1.2GHz operation point in the device tree.

Signed-off-by: Valentin Raevsky <valentin@compulab.co.il>
[christopher.spinrath@rwth-aachen.de: enhance commit message, adjust
 remaining operation points to match the ones in imx6q.dtsi and add
 a comment in the device tree]
Signed-off-by: Christopher Spinrath <christopher.spinrath@rwth-aachen.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6q-cm-fx6.dts b/arch/arm/boot/dts/imx6q-cm-fx6.dts
index 6d8d5e9..b5de7e6 100644 (file)
--- a/arch/arm/boot/dts/imx6q-cm-fx6.dts
+++ b/arch/arm/boot/dts/imx6q-cm-fx6.dts
@@ -91,6 +91,28 @@
        };
 };
 
+&cpu0 {
+       /*
+        * Although the imx6q fuse indicates that 1.2GHz operation is possible,
+        * the module behaves unstable at this frequency. Hence, remove the
+        * 1.2GHz operation point here.
+        */
+       operating-points = <
+               /* kHz  uV */
+               996000  1250000
+               852000  1250000
+               792000  1175000
+               396000  975000
+       >;
+       fsl,soc-operating-points = <
+               /* ARM kHz      SOC-PU uV */
+               996000          1250000
+               852000          1250000
+               792000          1175000
+               396000          1175000
+       >;
+};
+
 &ecspi1 {
        fsl,spi-num-chipselects = <2>;
        cs-gpios = <&gpio2 30 GPIO_ACTIVE_HIGH>, <&gpio3 19 GPIO_ACTIVE_HIGH>;