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Subject[PATCH v3 1/5] powerpc/dts: add mcke-gpios for PM feature
Date
Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com>
---
Documentation/devicetree/bindings/soc/fsl/rcpm.txt | 13 +++++++++++++
arch/powerpc/boot/dts/fsl/t1040si-post.dtsi | 3 +++
2 files changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
index e284e4e..1d44a80 100644
--- a/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
+++ b/Documentation/devicetree/bindings/soc/fsl/rcpm.txt
@@ -21,6 +21,10 @@ Required properites:
* "fsl,qoriq-rcpm-2.0": for chassis 2.0 rcpm
* "fsl,qoriq-rcpm-2.1": for chassis 2.1 rcpm

+Optional properites:
+ - mcke-gpios : The GPIO pin is used for keeping the MCKE signal of DDR modules
+ low in the LPM35 state on some platforms, such as T1040.
+
All references to "1.0" and "2.0" refer to the QorIQ chassis version to
which the chip complies.
Chassis Version Example Chips
@@ -37,6 +41,15 @@ The RCPM node for T4240:
fsl,#rcpm-wakeup-cells = <2>;
};

+The RCPM node for T1040 (which supports LPM35 state):
+ rcpm: global-utilities@e2000 {
+ compatible = "fsl,t1040-rcpm", "fsl,qoriq-rcpm-2.1";
+ reg = <0xe2000 0x1000>;
+ fsl,#rcpm-wakeup-cells = <1>;
+ mcke-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>
+ };
+
+
* Freescale RCPM Wakeup Source Device Tree Bindings
-------------------------------------------
Required fsl,rcpm-wakeup property should be added to a device node if the device
diff --git a/arch/powerpc/boot/dts/fsl/t1040si-post.dtsi b/arch/powerpc/boot/dts/fsl/t1040si-post.dtsi
index 507649e..f66e7dd 100644
--- a/arch/powerpc/boot/dts/fsl/t1040si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/t1040si-post.dtsi
@@ -33,6 +33,7 @@
*/

#include <dt-bindings/thermal/thermal.h>
+#include <dt-bindings/gpio/gpio.h>

&bman_fbpr {
compatible = "fsl,bman-fbpr";
@@ -474,6 +475,8 @@
rcpm: global-utilities@e2000 {
compatible = "fsl,t1040-rcpm", "fsl,qoriq-rcpm-2.1";
reg = <0xe2000 0x1000>;
+ fsl,#rcpm-wakeup-cells = <1>;
+ mcke-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;
};

sfp: sfp@e8000 {
--
1.9.1
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