From: Lin Huang <hl@xxxxxxxxxxxxxx>
Enable the DMC (Dynamic Memory Controller) and the DFI (DDR PHY Interface)
nodes on gru/kevin boards so we can support DDR DVFS.
Signed-off-by: Lin Huang <hl@xxxxxxxxxxxxxx>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Signed-off-by: Gaël PORTAY <gael.portay@xxxxxxxxxxxxx>
---
Changes in v3:
- [PATCH v2 5/5] Remove display_subsystem nodes.
Changes in v2:
- [PATCH 8/8] Move center-supply attribute of dmc node in file
rk3399-gru-chromebook.dtsi (where ppvar_centerlogic is
defined).
Changes in v1: None
.../boot/dts/rockchip/rk3399-gru-chromebook.dtsi | 4 ++++
arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi | 16 ++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
index 931640e9aed4..cfb81356c61e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi
@@ -400,3 +400,7 @@ ap_i2c_tp: &i2c5 {
rockchip,pins = <0 8 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
+
+&dmc {
+ center-supply = <&ppvar_centerlogic>;
+};
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
index da03fa9c5662..1bde7ad3b980 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
@@ -289,6 +289,12 @@
status = "okay";
};
+&dmc_opp_table {
+ opp04 {
+ opp-suspend;
+ };
+};
+
/*
* Set some suspend operating points to avoid OVP in suspend
*
@@ -489,6 +495,16 @@ ap_i2c_audio: &i2c8 {
status = "okay";
};
+&dfi {
+ status = "okay";
+};
+
+&dmc {
+ status = "okay";
+ upthreshold = <25>;
+ downdifferential = <15>;
+};
+
&sdhci {
/*
* Signal integrity isn't great at 200 MHz and 150 MHz (DDR) gives the
--
2.21.0
