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authorSteven Lee <[email protected]>2021-05-24 15:32:53 +0800
committerJoel Stanley <[email protected]>2021-05-25 17:09:39 +0930
commit47b99d02bd8705a93671723a957b50d3875afb56 (patch)
tree669e9af890caff5776ae0c4aa4457f0e1270489a
parent6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff)
ARM: dts: aspeed: ast2600evb: Add sdhci node and gpio regulator for A2 evb.
AST2600 A2 (or newer) EVB has gpio regulators for toggling signal voltage between 3.3v and 1.8v, the patch adds sdhci node and gpio regulator in the dts file and adds comment for describing the reference design. Signed-off-by: Steven Lee <[email protected]> Acked-by: Andrew Jeffery <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Joel Stanley <[email protected]>
-rw-r--r--arch/arm/boot/dts/aspeed-ast2600-evb.dts84
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
index 2772796e215e..401034da6dcc 100644
--- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
+++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
@@ -4,6 +4,7 @@
/dts-v1/;
#include "aspeed-g6.dtsi"
+#include <dt-bindings/gpio/aspeed-gpio.h>
/ {
model = "AST2600 EVB";
@@ -21,6 +22,46 @@
device_type = "memory";
reg = <0x80000000 0x80000000>;
};
+
+ vcc_sdhci0: regulator-vcc-sdhci0 {
+ compatible = "regulator-fixed";
+ regulator-name = "SDHCI0 Vcc";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ gpios = <&gpio0 ASPEED_GPIO(V, 0) GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ };
+
+ vccq_sdhci0: regulator-vccq-sdhci0 {
+ compatible = "regulator-gpio";
+ regulator-name = "SDHCI0 VccQ";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ gpios = <&gpio0 ASPEED_GPIO(V, 1) GPIO_ACTIVE_HIGH>;
+ gpios-states = <1>;
+ states = <3300000 1>,
+ <1800000 0>;
+ };
+
+ vcc_sdhci1: regulator-vcc-sdhci1 {
+ compatible = "regulator-fixed";
+ regulator-name = "SDHCI1 Vcc";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ gpios = <&gpio0 ASPEED_GPIO(V, 2) GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ };
+
+ vccq_sdhci1: regulator-vccq-sdhci1 {
+ compatible = "regulator-gpio";
+ regulator-name = "SDHCI1 VccQ";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ gpios = <&gpio0 ASPEED_GPIO(V, 3) GPIO_ACTIVE_HIGH>;
+ gpios-states = <1>;
+ states = <3300000 1>,
+ <1800000 0>;
+ };
};
&mdio0 {
@@ -245,3 +286,46 @@
&uhci {
status = "okay";
};
+
+&sdc {
+ status = "okay";
+};
+
+/*
+ * The signal voltage of sdhci0 and sdhci1 on AST2600-A2 EVB is able to be
+ * toggled by GPIO pins.
+ * In the reference design, GPIOV0 of AST2600-A2 EVB is connected to the
+ * power load switch that provides 3.3v to sdhci0 vdd, GPIOV1 is connected to
+ * a 1.8v and a 3.3v power load switch that provides signal voltage to
+ * sdhci0 bus.
+ * If GPIOV0 is active high, sdhci0 is enabled, otherwise, sdhci0 is disabled.
+ * If GPIOV1 is active high, 3.3v power load switch is enabled, sdhci0 signal
+ * voltage is 3.3v, otherwise, 1.8v power load switch will be enabled,
+ * sdhci0 signal voltage becomes 1.8v.
+ * AST2600-A2 EVB also supports toggling signal voltage for sdhci1.
+ * The design is the same as sdhci0, it uses GPIOV2 as power-gpio and GPIOV3
+ * as power-switch-gpio.
+ */
+&sdhci0 {
+ status = "okay";
+ bus-width = <4>;
+ max-frequency = <100000000>;
+ sdhci-drive-type = /bits/ 8 <3>;
+ sdhci-caps-mask = <0x7 0x0>;
+ sdhci,wp-inverted;
+ vmmc-supply = <&vcc_sdhci0>;
+ vqmmc-supply = <&vccq_sdhci0>;
+ clk-phase-sd-hs = <7>, <200>;
+};
+
+&sdhci1 {
+ status = "okay";
+ bus-width = <4>;
+ max-frequency = <100000000>;
+ sdhci-drive-type = /bits/ 8 <3>;
+ sdhci-caps-mask = <0x7 0x0>;
+ sdhci,wp-inverted;
+ vmmc-supply = <&vcc_sdhci1>;
+ vqmmc-supply = <&vccq_sdhci1>;
+ clk-phase-sd-hs = <7>, <200>;
+};