Merge pull request #16 from linux-3ds/ctr_sdhc

add SDHC driver
linux-3ds · Apr 11, 2021 · 6f62208 · 6f62208
2 parents bf323e8 + 589fd57
commit 6f62208
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diff --git a/arch/arm/boot/dts/nintendo3ds.dtsi b/arch/arm/boot/dts/nintendo3ds.dtsi
@@ -49,6 +49,20 @@
 			no-output;
 		};
 
+		nwm: sdhc-controller@10122000 {
+			compatible = "nintendo,3ds-sdhc";
+			reg = <0x10122000 0x200>;
+
+			interrupts =
+				<GIC_SPI 0x20 IRQ_TYPE_EDGE_RISING>,
+				<GIC_SPI 0x21 IRQ_TYPE_EDGE_RISING>;
+
+			clocks = <&sdclk>;
+
+			cap-sdio-irq;
+			cap-sd-highspeed;
+		};
+
 		gpio0: gpio-controller@10147000 {
 			compatible = "nintendo,3ds-gpio", "basic-mmio-gpio";
 			reg = <0x10147000 0x2>;
@@ -354,9 +368,28 @@
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <134055928>;
+		clock-accuracy = <100>; /* wishful thinking */
 		clock-output-names = "3ds:refclk134mhz";
 	};
 
+	sdclk: refclk67mhz {
+		compatible = "fixed-factor-clock";
+		clocks = <&refclk>;
+		#clock-cells = <0>;
+		clock-div = <2>;
+		clock-mult = <1>;
+		clock-output-names = "3ds:refclk67mhz";
+	};
+
+	cpuclk: refclk268mhz {
+		compatible = "fixed-factor-clock";
+		clocks = <&refclk>;
+		#clock-cells = <0>;
+		clock-div = <1>;
+		clock-mult = <2>;
+		clock-output-names = "3ds:refclk268mhz";
+	};
+
 	poweroff: poweroff {
 		compatible = "regulator-poweroff";
 		cpu-supply = <&pwroff_reg>;

diff --git a/drivers/platform/nintendo3ds/Kconfig b/drivers/platform/nintendo3ds/Kconfig
@@ -15,6 +15,14 @@ menuconfig NINTENDO3DS_PLATFORM_DEVICES
 
 if NINTENDO3DS_PLATFORM_DEVICES
 
+config CTR_SDHC
+	tristate "Nintendo 3DS SD Host Controller"
+	select MMC
+	default y
+	help
+	  Add support for driving the 3DS SD Host Controller.
+	  Note: the controller is only used for the wireless chip.
+
 config CTR_PXI
 	tristate "Nintendo 3DS VirtIO bridge"
 	select VIRTIO

diff --git a/drivers/platform/nintendo3ds/Makefile b/drivers/platform/nintendo3ds/Makefile
@@ -1,5 +1,7 @@
 obj-$(CONFIG_ARCH_CTR)	+= ctr_gpiointc.o	# hacked in by default
 
+obj-$(CONFIG_CTR_SDHC)	+= ctr_sdhc.o
+
 obj-$(CONFIG_CTR_PXI)	+= ctr_pxi.o
 
 obj-$(CONFIG_CTR_SPI)	+= ctr_spi.o