[PATCH 07/10] arm: dts: aspeed: Adjust clock phase parameter
From: Chin-Ting Kuo
Date: Wed Sep 22 2021 - 06:32:31 EST
Change clock phase degree for AST2600 EVB.
These parameter has been verified with 100MHz
clock frequency for eMMC and SD controllers.
Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@xxxxxxxxxxxxxx>
---
arch/arm/boot/dts/aspeed-ast2600-evb-a1.dts | 8 ++++++++
arch/arm/boot/dts/aspeed-ast2600-evb.dts | 9 ++++++---
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb-a1.dts b/arch/arm/boot/dts/aspeed-ast2600-evb-a1.dts
index dd7148060c4a..2d83617dc436 100644
--- a/arch/arm/boot/dts/aspeed-ast2600-evb-a1.dts
+++ b/arch/arm/boot/dts/aspeed-ast2600-evb-a1.dts
@@ -13,3 +13,11 @@
};
/delete-node/ &sdc;
+
+&emmc_controller {
+ max-tap-delay = <706>;
+};
+
+&emmc {
+ clk-phase-mmc-hs200 = <0 13>, <1 103>;
+};
diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
index 4551dba499c2..f728b9d9b4cf 100644
--- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
+++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
@@ -143,13 +143,15 @@
&emmc_controller {
status = "okay";
+ /* Measured value with *handwave* environmentals and static loading */
+ max-tap-delay = <736>;
};
&emmc {
non-removable;
bus-width = <4>;
max-frequency = <100000000>;
- clk-phase-mmc-hs200 = <9>, <225>;
+ clk-phase-mmc-hs200 = <0 27>, <1 95>;
};
&rtc {
@@ -260,6 +262,7 @@
&sdc {
status = "okay";
+ max-tap-delay = <9000>;
};
/*
@@ -287,7 +290,7 @@
sdhci,wp-inverted;
vmmc-supply = <&vcc_sdhci0>;
vqmmc-supply = <&vccq_sdhci0>;
- clk-phase-sd-hs = <7>, <200>;
+ clk-phase-uhs-sdr50 = <0 130>, <0 238>;
};
&sdhci1 {
@@ -300,5 +303,5 @@
sdhci,wp-inverted;
vmmc-supply = <&vcc_sdhci1>;
vqmmc-supply = <&vccq_sdhci1>;
- clk-phase-sd-hs = <7>, <200>;
+ clk-phase-uhs-sdr50 = <0 130>, <0 130>;
};
--
2.17.1