From: Hebbar, Gururaja <gururaja.hebbar@xxxxxx>
This adds a sleep and wake sequence to set the VDD core voltage to the
OPP50 level, 0.950V. This saves power during suspend. The sequences are
specific to the EVM-SK layout and PMIC, the TPS65910. The sequences
are written out by the Cortex-M3.
Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@xxxxxx>
Signed-off-by: Russ Dill <Russ.Dill@xxxxxx>
---
arch/arm/boot/dts/am335x-evmsk.dts | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/boot/dts/am335x-evmsk.dts b/arch/arm/boot/dts/am335x-evmsk.dts
index 0c8ad17..704bbb3 100644
--- a/arch/arm/boot/dts/am335x-evmsk.dts
+++ b/arch/arm/boot/dts/am335x-evmsk.dts
@@ -174,6 +174,16 @@
status = "okay";
clock-frequency = <400000>;
+ /* Set OPP50 (0.95V) for VDD core */
+ sleep_sequence = /bits/ 8 <
+ 0x02 0x2d 0x25 0x1f /* Set VDD2 to 0.95V */
+ >;
+
+ /* Set OPP100 (1.10V) for VDD core */
+ wake_sequence = /bits/ 8 <
+ 0x02 0x2d 0x25 0x2b /* Set VDD2 to 1.1V */
+ >;
+
tps: tps@2d {
reg = <0x2d>;
};
--
1.8.3.2
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