ARM: dts: exynos: Add support for Samsung Chagall WiFi

Chagall WiFi, with product name Samsung Galaxy Tab S 10.5", is based
on Exynos 5420. This device is one of several tablet models released
in 2014 based on Exynos 5420.

The device tree added here contains support for:

- UART
- eMMC
- SD card
- USB

CCI has been disabled in the hardware, enabling it would require
(de-)soldering a resistor on the board. Trying to boot with it
enabled in kernel makes the device hang when CCI is probed.
Exynos5420-arndale-octa also has had CCI disabled due to issues, see
commit 25217fef3551 ("ARM: dts: disable CCI on exynos5420 based
arndale-octa").

Signed-off-by: Henrik Grimler <[e-mail]>
Reviewed-by: Alim Akhtar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/Makefile

···
 	exynos5420-arndale-octa.dtb \
 	exynos5420-peach-pit.dtb \
 	exynos5420-smdk5420.dtb \
+	exynos5420-chagall-wifi.dtb \
 	exynos5422-odroidhc1.dtb \
 	exynos5422-odroidxu3.dtb \
 	exynos5422-odroidxu3-lite.dtb \

arch/arm/boot/dts/exynos5420-chagall-wifi.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Samsung's Exynos5420 Chagall WiFi board device tree source
+ *
+ * Copyright (c) 2012-2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2022 Henrik Grimler
+ */
+
+/dts-v1/;
+#include "exynos5420-galaxy-tab-common.dtsi"
+
+/ {
+	model = "Samsung Chagall WiFi based on Exynos5420";
+	compatible = "samsung,chagall-wifi", "samsung,exynos5420", \
+		     "samsung,exynos5";
+};
+
+&ldo15_reg {
+	/* Unused */
+	regulator-name = "VDD_LDO15";
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+};
+
+&ldo17_reg {
+	regulator-name = "VDD_IRLED_3V3";
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3350000>;
+	regulator-always-on;
+	regulator-boot-on;
+
+	regulator-state-mem {
+		regulator-off-in-suspend;
+	};
+};
+
+&ldo28_reg {
+	/* Unused */
+	regulator-name = "VDD_LDO28";
+	regulator-min-microvolt = <3300000>;
+	regulator-max-microvolt = <3300000>;
+};
+
+&ldo29_reg {
+	regulator-name = "VDD_TCON_1V8";
+	regulator-min-microvolt = <1900000>;
+	regulator-max-microvolt = <1900000>;
+
+	regulator-state-mem {
+		regulator-off-in-suspend;
+	};
+};
+
+&ldo31_reg {
+	regulator-name = "VDD_GRIP_1V8";
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <1800000>;
+	regulator-always-on;
+	regulator-boot-on;
+
+	regulator-state-mem {
+		regulator-off-in-suspend;
+	};
+};
+
+&ldo32_reg {
+	regulator-name = "VDD_TSP_1V8";
+	regulator-min-microvolt = <1900000>;
+	regulator-max-microvolt = <1900000>;
+
+	regulator-state-mem {
+		regulator-off-in-suspend;
+	};
+};

arch/arm/boot/dts/exynos5420-galaxy-tab-common.dtsi

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Base DT for Samsung's family of tablets based on Exynos5420.
+ *
+ * Copyright (c) 2012-2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2022 Henrik Grimler
+ */
+
+/dts-v1/;
+#include "exynos5420.dtsi"
+#include "exynos5420-cpus.dtsi"
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/clock/samsung,s2mps11.h>
+
+/ {
+	chassis-type = "tablet";
+
+	/*
+	 * To successfully boot the mainline kernel with the stock
+	 * bootloader (SBOOT), the tlb needs to be flushed after the
+	 * page table pointer has been updated in __common_mmu_cache_on.
+	 * The same hack is also needed to boot exynos4412-i9300 with
+	 * stock bootloader, and probably other Samsung devices of
+	 * similar age.  See
+	 * https://lore.kernel.org/all/[e-mail]
+	 * for more details.
+	 */
+
+	chosen {
+		stdout-path = "serial2:115200n8";
+	};
+
+	memory@20000000 {
+		device_type = "memory";
+		reg = <0x20000000 0xc0000000>;
+	};
+
+	firmware@2073000 {
+		compatible = "samsung,secure-firmware";
+		reg = <0x02073000 0x1000>;
+	};
+
+	fixed-rate-clocks {
+		oscclk {
+			compatible = "samsung,exynos5420-oscclk";
+			clock-frequency = <24000000>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+
+		key-power {
+			debounce-interval = <10>;
+			gpios = <&gpx2 2 GPIO_ACTIVE_LOW>;
+			label = "Power";
+			linux,code = <KEY_POWER>;
+			wakeup-source;
+		};
+
+		key-home {
+			debounce-interval = <10>;
+			gpios = <&gpx0 5 GPIO_ACTIVE_LOW>;
+			label = "Home";
+			linux,code = <KEY_HOME>;
+			wakeup-source;
+		};
+
+		key-volume-up {
+			debounce-interval = <10>;
+			gpios = <&gpx0 2 GPIO_ACTIVE_LOW>;
+			label = "Volume Up";
+			linux,code = <KEY_VOLUMEUP>;
+		};
+
+		key-volume-down {
+			debounce-interval = <10>;
+			gpios = <&gpx0 3 GPIO_ACTIVE_LOW>;
+			label = "Volume Down";
+			linux,code = <KEY_VOLUMEDOWN>;
+		};
+	};
+};
+
+&cci {
+	/* CCI is disabled in hardware */
+	status = "disabled";
+};
+
+&cpu0 {
+	cpu-supply = <&buck2_reg>;
+};
+
+&cpu4 {
+	cpu-supply = <&buck6_reg>;
+};
+
+&gpu {
+	status = "okay";
+	mali-supply = <&buck4_reg>;
+};
+
+&hsi2c_7 {
+	status = "okay";
+
+	pmic@66 {
+		compatible = "samsung,s2mps11-pmic";
+		reg = <0x66>;
+
+		interrupt-parent = <&gpx3>;
+		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&s2mps11_irq>;
+
+		s2mps11_osc: clocks {
+			compatible = "samsung,s2mps11-clk";
+			#clock-cells = <1>;
+			clock-output-names = "s2mps11_ap", "s2mps11_cp",
+					     "s2mps11_bt";
+		};
+
+		regulators {
+			buck1_reg: BUCK1 {
+				regulator-name = "VDD_MIF_1V1";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			buck2_reg: BUCK2 {
+				regulator-name = "VDD_ARM_1V0";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1500000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			buck3_reg: BUCK3 {
+				regulator-name = "VDD_INT_1V0";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1400000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			buck4_reg: BUCK4 {
+				regulator-name = "VDD_G3D_1V0";
+				regulator-min-microvolt = <700000>;
+				regulator-max-microvolt = <1400000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			buck5_reg: BUCK5 {
+				regulator-name = "VDD_MEM_1V2";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+
+			};
+
+			buck6_reg: BUCK6 {
+				regulator-name = "VDD_KFC_1V0";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1500000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			buck7_reg: BUCK7 {
+				regulator-name = "VIN_LLDO_1V4";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1500000>;
+				regulator-always-on;
+			};
+
+			buck8_reg: BUCK8 {
+				regulator-name = "VIN_MLDO_2V0";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <2100000>;
+				regulator-always-on;
+			};
+
+			buck9_reg: BUCK9 {
+				regulator-name = "VIN_HLDO_3V5";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3500000>;
+				regulator-always-on;
+			};
+
+			buck10_reg: BUCK10 {
+				regulator-name = "VDD_CAM_ISP_1V0";
+				regulator-min-microvolt = <750000>;
+				regulator-max-microvolt = <3550000>;
+			};
+
+			ldo1_reg: LDO1 {
+				regulator-name = "VDD_ALIVE_1.0V";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+			};
+
+			ldo2_reg: LDO2 {
+				regulator-name = "VDD_APIO_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo3_reg: LDO3 {
+				regulator-name = "VDD_APIO_MMC01_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo4_reg: LDO4 {
+				regulator-name = "VDD_ADC_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo5_reg: LDO5 {
+				/* Unused */
+				regulator-name = "VDD_LDO5";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo6_reg: LDO6 {
+				regulator-name = "VDD_MIPI_1V0";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo7_reg: LDO7 {
+				regulator-name = "VDD_MIPI_PLL_ABB1_18V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo8_reg: LDO8 {
+				/* Unused */
+				regulator-name = "VDD_LDO8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo9_reg: LDO9 {
+				regulator-name = "VDD_UOTG_3V0";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo10_reg: LDO10 {
+				regulator-name = "VDDQ_PRE_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo11_reg: LDO11 {
+				regulator-name = "VDD_HSIC_1V0";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo12_reg: LDO12 {
+				regulator-name = "VDD_HSIC_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo13_reg: LDO13 {
+				regulator-name = "VDD_APIO_MMC2_2V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <2800000>;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo14_reg: LDO14 {
+				regulator-name = "VDD_MOTOR_3V0";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3000000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo15_reg: LDO15 {
+				regulator-name = "VDD_LDO15";
+				/*
+				 * LDO15 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo16_reg: LDO16 {
+				regulator-name = "VDD_AP_2V8";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo17_reg: LDO17 {
+				regulator-name = "VDD_LDO17";
+				/*
+				 * LDO17 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo18_reg: LDO18 {
+				/* Unused */
+				regulator-name = "VDD_LDO18";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo19_reg: LDO19 {
+				regulator-name = "VDD_VTF_2V8";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo20_reg: LDO20 {
+				regulator-name = "VDD_CAM1_CAM_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo21_reg: LDO21 {
+				regulator-name = "VDD_CAM_IO_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo22_reg: LDO22 {
+				regulator-name = "VDD_CAM0_S_CORE_1V1";
+				regulator-min-microvolt = <1050000>;
+				regulator-max-microvolt = <1200000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo23_reg: LDO23 {
+				regulator-name = "VDD_MIFS_1V1";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-always-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo24_reg: LDO24 {
+				regulator-name = "VDD_TSP_3V3";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo25_reg: LDO25 {
+				/* Unused */
+				regulator-name = "VDD_LDO25";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3950000>;
+			};
+
+			ldo26_reg: LDO26 {
+				regulator-name = "VDD_CAM0_AF_2V8";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo27_reg: LDO27 {
+				regulator-name = "VDD_G3DS_1V0";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+
+				regulator-state-mem {
+					regulator-on-in-suspend;
+				};
+			};
+
+			ldo28_reg: LDO28 {
+				regulator-name = "VDD_LDO28";
+				/*
+				 * LDO28 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo29_reg: LDO29 {
+				regulator-name = "VDD_LDO29";
+				/*
+				 * LDO29 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo30_reg: LDO30 {
+				regulator-name = "VDD_TOUCH_1V8";
+				regulator-min-microvolt = <1900000>;
+				regulator-max-microvolt = <1900000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo31_reg: LDO31 {
+				regulator-name = "VDD_LDO31";
+				/*
+				 * LDO31 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo32_reg: LDO32 {
+				regulator-name = "VDD_LDO32";
+				/*
+				 * LDO32 varies between devices and is
+				 * specified in the device dts
+				 */
+			};
+
+			ldo33_reg: LDO33 {
+				regulator-name = "VDD_MHL_1V8";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo34_reg: LDO34 {
+				regulator-name = "VDD_MHL_3V3";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo35_reg: LDO35 {
+				regulator-name = "VDD_SIL_1V2";
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			ldo36_reg: LDO36 {
+				/* Unused */
+				regulator-name = "VDD_LDO36";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3950000>;
+			};
+
+			ldo37_reg: LDO37 {
+				/* Unused */
+				regulator-name = "VDD_LDO37";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3950000>;
+			};
+
+			ldo38_reg: LDO38 {
+				regulator-name = "VDD_KEY_LED_3V3";
+				regulator-min-microvolt = <2500000>;
+				regulator-max-microvolt = <3300000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+		};
+	};
+};
+
+&mixer {
+	status = "okay";
+};
+
+/* Internal storage */
+&mmc_0 {
+	status = "okay";
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	card-detect-delay = <200>;
+	mmc-hs200-1_8v;
+	non-removable;
+	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus1 &sd0_bus4 &sd0_bus8>;
+	pinctrl-names = "default";
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-ddr-timing = <0 2>;
+	samsung,dw-mshc-sdr-timing = <0 4>;
+	vqmmc-supply = <&ldo3_reg>;
+};
+
+/* External sdcard */
+&mmc_2 {
+	status = "okay";
+	bus-width = <4>;
+	cap-sd-highspeed;
+	card-detect-delay = <200>;
+	cd-gpios = <&gpx2 4 GPIO_ACTIVE_LOW>;
+	pinctrl-0 = <&sd2_clk &sd2_cmd &mmc2_cd &sd2_bus1 &sd2_bus4>;
+	pinctrl-names = "default";
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-ddr-timing = <0 2>;
+	samsung,dw-mshc-sdr-timing = <0 4>;
+	sd-uhs-sdr50;
+	vmmc-supply = <&ldo19_reg>;
+	vqmmc-supply = <&ldo13_reg>;
+};
+
+&pinctrl_0 {
+	mmc2_cd: mmc2-cd-pins {
+		samsung,pins = "gpx2-4";
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
+	s2mps11_irq: s2mps11-irq-pins {
+		samsung,pins = "gpx3-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+};
+
+&rtc {
+	status = "okay";
+	clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;
+	clock-names = "rtc", "rtc_src";
+};
+
+&tmu_cpu0 {
+	vtmu-supply = <&ldo10_reg>;
+};
+
+&tmu_cpu1 {
+	vtmu-supply = <&ldo10_reg>;
+};
+
+&tmu_cpu2 {
+	vtmu-supply = <&ldo10_reg>;
+};
+
+&tmu_cpu3 {
+	vtmu-supply = <&ldo10_reg>;
+};
+
+&tmu_gpu {
+	vtmu-supply = <&ldo10_reg>;
+};
+
+&usbdrd_dwc3_0 {
+	dr_mode = "peripheral";
+};
+
+&usbdrd_dwc3_1 {
+	dr_mode = "peripheral";
+};
+
+&usbdrd3_0 {
+	vdd33-supply = <&ldo9_reg>;
+	vdd10-supply = <&ldo11_reg>;
+};
+
+&usbdrd3_1 {
+	vdd33-supply = <&ldo9_reg>;
+	vdd10-supply = <&ldo11_reg>;
+};