Enable UFS device for R-Car S4-8 Spider CPU board.
Note that the conditions of RC21012 on the Spider are:
- OUT11 (for UFS30_REFCLK_V) is disabled as default.
- OUT11 is controlled by GPIO0 pin.
- The GPIO0 pin is inverted sense (low active) and pull-up enabled.
To output the clock, pin 4 of TCA9554 on the Spider board needs to
output low level so that using "gpio-gate-clock" for it.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Changes from v1:
- Add /delete-property/ clock-frequency; in the ufs30_clk.
- Add Tested-by. (Geert-san, thanks!)
.../boot/dts/renesas/r8a779f0-spider-cpu.dtsi | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi b/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi
index 25b34d66061a..adb07dfd63f6 100644
--- a/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi
@@ -5,6 +5,7 @@
* Copyright (C) 2021 Renesas Electronics Corp.
*/
+#include <dt-bindings/gpio/gpio.h>
#include "r8a779f0.dtsi"
/ {
@@ -32,6 +33,12 @@ memory@480000000 {
reg = <0x4 0x80000000 0x0 0x80000000>;
};
+ rc21012_ufs: clk-rc21012-ufs {
+ compatible = "fixed-clock";
+ clock-frequency = <38400000>;
+ #clock-cells = <0>;
+ };
+
reg_1p8v: regulator-1p8v {
compatible = "regulator-fixed";
regulator-name = "fixed-1.8V";
@@ -67,6 +74,21 @@ &hscif0 {
status = "okay";
};
+&i2c0 {
+ pinctrl-0 = <&i2c0_pins>;
+ pinctrl-names = "default";
+
+ status = "okay";
+ clock-frequency = <400000>;
+
+ gpio_exp_20: gpio@20 {
+ compatible = "ti,tca9554";
+ reg = <0x20>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+};
+
&i2c4 {
pinctrl-0 = <&i2c4_pins>;
pinctrl-names = "default";
@@ -112,6 +134,11 @@ hscif0_pins: hscif0 {
function = "hscif0";
};
+ i2c0_pins: i2c0 {
+ groups = "i2c0";
+ function = "i2c0";
+ };
+
i2c4_pins: i2c4 {
groups = "i2c4";
function = "i2c4";
@@ -150,3 +177,14 @@ &scif0 {
&scif_clk {
clock-frequency = <24000000>;
};
+
+&ufs {
+ status = "okay";
+};
+
+&ufs30_clk {
+ compatible = "gpio-gate-clock";
+ clocks = <&rc21012_ufs>;
+ enable-gpios = <&gpio_exp_20 4 GPIO_ACTIVE_LOW>;
+ /delete-property/ clock-frequency;
+};
--
2.25.1
