[PATCH v3 5/5] ARM: dts: rockchip: Add SFC for RK3128

[Alex Bee]

Add the Serial Flash Controller and it's pincontrols.

Signed-off-by: Alex Bee <knaerzche at gmail.com>
---
changes since v2:
Fixed pinux settings for the chipselect pincontrols which originated from
contradictory documentation: Datasheet [0] (page 29/31) says it is func4
(when start counting with func1), while TRM [1] (page 185) says func3
(register value 0x2). It turned out TRM is correct as with setting cs
pincontrols to func4 the spi chip is not detected, while func3 is fine.

[0] https://www.armdesigner.com/download/Rockchip_RK3128_datasheet_V1.2.pdf, 
[1] https://www.t-firefly.com/download/fireprime/docs/rk3128_trm/chapter-5-general-register-file(grf).pdf


 arch/arm/boot/dts/rockchip/rk3128.dtsi | 35 ++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm/boot/dts/rockchip/rk3128.dtsi b/arch/arm/boot/dts/rockchip/rk3128.dtsi
index a7ab0904564f..c37aed28bd10 100644
--- a/arch/arm/boot/dts/rockchip/rk3128.dtsi
+++ b/arch/arm/boot/dts/rockchip/rk3128.dtsi
@@ -399,6 +399,15 @@ usb_host_ohci: usb at 101e0000 {
 		status = "disabled";
 	};
 
+	sfc: spi at 1020c000 {
+		compatible = "rockchip,sfc";
+		reg = <0x1020c000 0x8000>;
+		interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru SCLK_SFC>, <&cru HCLK_SFC>;
+		clock-names = "clk_sfc", "hclk_sfc";
+		status = "disabled";
+	};
+
 	sdmmc: mmc at 10214000 {
 		compatible = "rockchip,rk3128-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x10214000 0x4000>;
@@ -1155,6 +1164,32 @@ sdmmc_bus4: sdmmc-bus4 {
 			};
 		};
 
+		sfc {
+			sfc_bus2: sfc-bus2 {
+				rockchip,pins = <1 RK_PD0 3 &pcfg_pull_default>,
+						<1 RK_PD1 3 &pcfg_pull_default>;
+			};
+
+			sfc_bus4: sfc-bus4 {
+				rockchip,pins = <1 RK_PD0 3 &pcfg_pull_default>,
+						<1 RK_PD1 3 &pcfg_pull_default>,
+						<1 RK_PD2 3 &pcfg_pull_default>,
+						<1 RK_PD3 3 &pcfg_pull_default>;
+			};
+
+			sfc_clk: sfc-clk {
+				rockchip,pins = <2 RK_PA4 3 &pcfg_pull_none>;
+			};
+
+			sfc_cs0: sfc-cs0 {
+				rockchip,pins = <2 RK_PA2 2 &pcfg_pull_default>;
+			};
+
+			sfc_cs1: sfc-cs1 {
+				rockchip,pins = <2 RK_PA3 2 &pcfg_pull_default>;
+			};
+		};
+
 		spdif {
 			spdif_tx: spdif-tx {
 				rockchip,pins = <3 RK_PD3 1 &pcfg_pull_none>;
-- 
2.45.2