From: Magnus Damm <damm@xxxxxxxxxxxxx>
Add genmai board support code to make use of one of the on-chip rpc-if devices
to interface to the on-board SPI flash U6 Spansion S25FK512S-16. Without this
patch the SPI flash is accessible through a memory mapped window, however by
adding pinctrl configuration and a rpc-if device node to the DTS we can now
access the SPI flash via the the rpc-if driver instead.
Signed-off-by: Magnus Damm <damm@xxxxxxxxxxxxx>
---
Applies to next-20250704
arch/arm/boot/dts/renesas/r7s72100-genmai.dts | 71 ++++++++++++++-----------
1 file changed, 42 insertions(+), 29 deletions(-)
--- 0001/arch/arm/boot/dts/renesas/r7s72100-genmai.dts
+++ work/arch/arm/boot/dts/renesas/r7s72100-genmai.dts 2025-07-06 00:02:33.267119292 +0900
@@ -18,6 +18,7 @@
aliases {
serial0 = &scif2;
+ spi0 = &rpc0;
};
chosen {
@@ -25,35 +26,6 @@
stdout-path = "serial0:115200n8";
};
- flash@18000000 {
- compatible = "mtd-rom";
- reg = <0x18000000 0x08000000>;
- bank-width = <4>;
- device-width = <1>;
-
- clocks = <&mstp9_clks R7S72100_CLK_SPIBSC0>;
- power-domains = <&cpg_clocks>;
-
- #address-cells = <1>;
- #size-cells = <1>;
-
- partitions {
- compatible = "fixed-partitions";
- #address-cells = <1>;
- #size-cells = <1>;
-
- partition@0 {
- label = "user";
- reg = <0x00000000 0x04000000>;
- };
-
- partition@4000000 {
- label = "user1";
- reg = <0x04000000 0x04000000>;
- };
- };
- };
-
keyboard {
compatible = "gpio-keys";
@@ -98,6 +70,38 @@
};
};
+&rpc0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&rpc0_pins>;
+
+ status = "okay";
+
+ flash0: spi-flash@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ spi-max-frequency = <50000000>;
+ spi-tx-bus-width = <1>;
+ spi-rx-bus-width = <1>;
+ reg = <0>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "uboot";
+ reg = <0x00000000 0x00080000>;
+ };
+ partition@80000 {
+ label = "uboot-env";
+ reg = <0x00080000 0x00040000>;
+ };
+ };
+ };
+};
+
&bsc {
flash@0 {
compatible = "cfi-flash";
@@ -273,6 +277,15 @@
<RZA1_PINMUX(4, 14, 3)>, /* SD_D3_0 */
<RZA1_PINMUX(4, 15, 3)>; /* SD_D2_0 */
};
+
+ rpc0_pins: rpc0 {
+ pinmux = <RZA1_PINMUX(9, 2, 2)>, /* P9_2/SPBCLK_0 */
+ <RZA1_PINMUX(9, 3, 2)>, /* P9_3/SPBSSL_0 */
+ <RZA1_PINMUX(9, 4, 2)>, /* P9_4/SPBIO00_0 */
+ <RZA1_PINMUX(9, 5, 2)>, /* P9_5/SPBIO10_0 */
+ <RZA1_PINMUX(9, 6, 2)>, /* P9_6/SPBIO20_0 */
+ <RZA1_PINMUX(9, 7, 2)>; /* P9_7/SPBIO30_0 */
+ };
};
&rtc_x1_clk {
