arch/arm/dts/rk3399-gru.dtsi

// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
 * Google Gru (and derivatives) board device tree source
 *
 * Copyright 2016-2017 Google, Inc
 */

#include <dt-bindings/input/input.h>
#include "rk3399.dtsi"
#include "rk3399-op1-opp.dtsi"

/ {
	chosen {
		u-boot,dm-pre-reloc;
		stdout-path = "serial2:115200n8";
		u-boot,spl-boot-order = &spi_flash;
	};

	config {
		u-boot,spl-payload-offset = <0x40000>;
	};

	/*
	 * Power Tree
	 *
	 * In general an attempt is made to include all rails called out by
	 * the schematic as long as those rails interact in some way with
	 * the AP.  AKA:
	 * - Rails that only connect to the EC (or devices that the EC talks to)
	 *   are not included.
	 * - Rails _are_ included if the rails go to the AP even if the AP
	 *   doesn't currently care about them / they are always on.  The idea
	 *   here is that it makes it easier to map to the schematic or extend
	 *   later.
	 *
	 * If two rails are substantially the same from the AP's point of
	 * view, though, we won't create a full fixed regulator.  We'll just
	 * put the child rail as an alias of the parent rail.  Sometimes rails
	 * look the same to the AP because one of these is true:
	 * - The EC controls the enable and the EC always enables a rail as
	 *   long as the AP is running.
	 * - The rails are actually connected to each other by a jumper and
	 *   the distinction is just there to add clarity/flexibility to the
	 *   schematic.
	 */

	ppvar_sys: ppvar-sys {
		compatible = "regulator-fixed";
		regulator-name = "ppvar_sys";
		regulator-always-on;
		regulator-boot-on;
	};

	pp1200_lpddr: pp1200-lpddr {
		compatible = "regulator-fixed";
		regulator-name = "pp1200_lpddr";

		/* EC turns on w/ lpddr_pwr_en; always on for AP */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <1200000>;
		regulator-max-microvolt = <1200000>;

		vin-supply = <&ppvar_sys>;
	};

	pp1800: pp1800 {
		compatible = "regulator-fixed";
		regulator-name = "pp1800";

		/* Always on when ppvar_sys shows power good */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <1800000>;

		vin-supply = <&ppvar_sys>;
	};

	pp3300: pp3300 {
		compatible = "regulator-fixed";
		regulator-name = "pp3300";

		/* Always on; plain and simple */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;

		vin-supply = <&ppvar_sys>;
	};

	pp5000: pp5000 {
		compatible = "regulator-fixed";
		regulator-name = "pp5000";

		/* EC turns on w/ pp5000_en; always on for AP */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <5000000>;
		regulator-max-microvolt = <5000000>;

		vin-supply = <&ppvar_sys>;
	};

	ppvar_bigcpu_pwm: ppvar-bigcpu-pwm {
		compatible = "pwm-regulator";
		regulator-name = "ppvar_bigcpu_pwm";

		pwms = <&pwm1 0 3337 0>;
		pwm-supply = <&ppvar_sys>;
		pwm-dutycycle-range = <100 0>;
		pwm-dutycycle-unit = <100>;

		/* EC turns on w/ ap_core_en; always on for AP */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <800107>;
		regulator-max-microvolt = <1302232>;
	};

	ppvar_bigcpu: ppvar-bigcpu {
		compatible = "vctrl-regulator";
		regulator-name = "ppvar_bigcpu";

		regulator-min-microvolt = <800107>;
		regulator-max-microvolt = <1302232>;

		ctrl-supply = <&ppvar_bigcpu_pwm>;
		ctrl-voltage-range = <800107 1302232>;

		regulator-settling-time-up-us = <322>;
	};

	ppvar_litcpu_pwm: ppvar-litcpu-pwm {
		compatible = "pwm-regulator";
		regulator-name = "ppvar_litcpu_pwm";

		pwms = <&pwm2 0 3337 0>;
		pwm-supply = <&ppvar_sys>;
		pwm-dutycycle-range = <100 0>;
		pwm-dutycycle-unit = <100>;

		/* EC turns on w/ ap_core_en; always on for AP */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <797743>;
		regulator-max-microvolt = <1307837>;
	};

	ppvar_litcpu: ppvar-litcpu {
		compatible = "vctrl-regulator";
		regulator-name = "ppvar_litcpu";

		regulator-min-microvolt = <797743>;
		regulator-max-microvolt = <1307837>;

		ctrl-supply = <&ppvar_litcpu_pwm>;
		ctrl-voltage-range = <797743 1307837>;

		regulator-settling-time-up-us = <384>;
	};

	ppvar_gpu_pwm: ppvar-gpu-pwm {
		compatible = "pwm-regulator";
		regulator-name = "ppvar_gpu_pwm";

		pwms = <&pwm0 0 3337 0>;
		pwm-supply = <&ppvar_sys>;
		pwm-dutycycle-range = <100 0>;
		pwm-dutycycle-unit = <100>;

		/* EC turns on w/ ap_core_en; always on for AP */
		regulator-always-on;
		regulator-boot-on;
		regulator-min-microvolt = <786384>;
		regulator-max-microvolt = <1217747>;
	};

	ppvar_gpu: ppvar-gpu {
		compatible = "vctrl-regulator";
		regulator-name = "ppvar_gpu";

		regulator-min-microvolt = <786384>;
		regulator-max-microvolt = <1217747>;

		ctrl-supply = <&ppvar_gpu_pwm>;
		ctrl-voltage-range = <786384 1217747>;

		regulator-settling-time-up-us = <390>;
	};

	/* EC turns on w/ pp900_ddrpll_en */
	pp900_ddrpll: pp900-ap {
	};

	/* EC turns on w/ pp900_pll_en */
	pp900_pll: pp900-ap {
	};

	/* EC turns on w/ pp900_pmu_en */
	pp900_pmu: pp900-ap {
	};

	/* EC turns on w/ pp1800_s0_en_l */
	pp1800_ap_io: pp1800_emmc: pp1800_nfc: pp1800_s0: pp1800 {
	};

	/* EC turns on w/ pp1800_avdd_en_l */
	pp1800_avdd: pp1800 {
	};

	/* EC turns on w/ pp1800_lid_en_l */
	pp1800_lid: pp1800_mic: pp1800 {
	};

	/* EC turns on w/ lpddr_pwr_en */
	pp1800_lpddr: pp1800 {
	};

	/* EC turns on w/ pp1800_pmu_en_l */
	pp1800_pmu: pp1800 {
	};

	/* EC turns on w/ pp1800_usb_en_l */
	pp1800_usb: pp1800 {
	};

	pp3000_sd_slot: pp3000-sd-slot {
		compatible = "regulator-fixed";
		regulator-name = "pp3000_sd_slot";
		pinctrl-names = "default";
		pinctrl-0 = <&sd_slot_pwr_en>;

		enable-active-high;
		gpio = <&gpio4 29 GPIO_ACTIVE_HIGH>;

		vin-supply = <&pp3000>;
	};

	/*
	 * Technically, this is a small abuse of 'regulator-gpio'; this
	 * regulator is a mux between pp1800 and pp3300. pp1800 and pp3300 are
	 * always on though, so it is sufficient to simply control the mux
	 * here.
	 */
	ppvar_sd_card_io: ppvar-sd-card-io {
		compatible = "regulator-gpio";
		regulator-name = "ppvar_sd_card_io";
		pinctrl-names = "default";
		pinctrl-0 = <&sd_io_pwr_en &sd_pwr_1800_sel>;

		enable-active-high;
		enable-gpio = <&gpio2 2 GPIO_ACTIVE_HIGH>;
		gpios = <&gpio2 28 GPIO_ACTIVE_HIGH>;
		states = <1800000 0x1
			  3000000 0x0>;

		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <3000000>;
	};

	/* EC turns on w/ pp3300_trackpad_en_l */
	pp3300_trackpad: pp3300-trackpad {
	};

	/* EC turns on w/ usb_a_en */
	pp5000_usb_a_vbus: pp5000 {
	};

	gpio_keys: gpio-keys {
		compatible = "gpio-keys";
		pinctrl-names = "default";
		pinctrl-0 = <&bt_host_wake_l>;

		wake_on_bt: wake-on-bt {
			label = "Wake-on-Bluetooth";
			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
			linux,code = <KEY_WAKEUP>;
			wakeup-source;
		};
	};

	max98357a: max98357a {
		compatible = "maxim,max98357a";
		pinctrl-names = "default";
		pinctrl-0 = <&sdmode_en>;
		sdmode-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
		sdmode-delay = <2>;
		#sound-dai-cells = <0>;
		status = "okay";
	};

	sound: sound {
		compatible = "rockchip,rk3399-gru-sound";
		rockchip,cpu = <&i2s0 &i2s2>;
	};
};

&cdn_dp {
	status = "okay";
};

/*
 * Set some suspend operating points to avoid OVP in suspend
 *
 * When we go into S3 ARM Trusted Firmware will transition our PWM regulators
 * from wherever they're at back to the "default" operating point (whatever
 * voltage we get when we set the PWM pins to "input").
 *
 * This quick transition under light load has the possibility to trigger the
 * regulator "over voltage protection" (OVP).
 *
 * To make extra certain that we don't hit this OVP at suspend time, we'll
 * transition to a voltage that's much closer to the default (~1.0 V) so that
 * there will not be a big jump.  Technically we only need to get within 200 mV
 * of the default voltage, but the speed here should be fast enough and we need
 * suspend/resume to be rock solid.
 */

&cluster0_opp {
	opp05 {
		opp-suspend;
	};
};

&cluster1_opp {
	opp06 {
		opp-suspend;
	};
};

&cpu_l0 {
	cpu-supply = <&ppvar_litcpu>;
};

&cpu_l1 {
	cpu-supply = <&ppvar_litcpu>;
};

&cpu_l2 {
	cpu-supply = <&ppvar_litcpu>;
};

&cpu_l3 {
	cpu-supply = <&ppvar_litcpu>;
};

&cpu_b0 {
	cpu-supply = <&ppvar_bigcpu>;
};

&cpu_b1 {
	cpu-supply = <&ppvar_bigcpu>;
};

&cru {
	assigned-clocks =
		<&cru PLL_GPLL>, <&cru PLL_CPLL>,
		<&cru PLL_NPLL>,
		<&cru ACLK_PERIHP>, <&cru HCLK_PERIHP>,
		<&cru PCLK_PERIHP>,
		<&cru ACLK_PERILP0>, <&cru HCLK_PERILP0>,
		<&cru PCLK_PERILP0>, <&cru ACLK_CCI>,
		<&cru HCLK_PERILP1>, <&cru PCLK_PERILP1>,
		<&cru ACLK_VIO>, <&cru ACLK_HDCP>,
		<&cru ACLK_GIC_PRE>,
		<&cru PCLK_DDR>;
	assigned-clock-rates =
		<600000000>, <800000000>,
		<1000000000>,
		<150000000>, <75000000>,
		<37500000>,
		<100000000>, <100000000>,
		<50000000>, <800000000>,
		<100000000>, <50000000>,
		<400000000>, <400000000>,
		<200000000>,
		<200000000>;
};

&emmc_phy {
	status = "okay";
};

&gpu {
	mali-supply = <&ppvar_gpu>;
	status = "okay";
};

ap_i2c_ts: &i2c3 {
	status = "okay";

	clock-frequency = <400000>;

	/* These are relatively safe rise/fall times */
	i2c-scl-falling-time-ns = <50>;
	i2c-scl-rising-time-ns = <300>;
};

ap_i2c_audio: &i2c8 {
	status = "okay";

	clock-frequency = <400000>;

	/* These are relatively safe rise/fall times */
	i2c-scl-falling-time-ns = <50>;
	i2c-scl-rising-time-ns = <300>;

	codec: da7219@1a {
		compatible = "dlg,da7219";
		reg = <0x1a>;
		interrupt-parent = <&gpio1>;
		interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
		clocks = <&cru SCLK_I2S_8CH_OUT>;
		clock-names = "mclk";
		dlg,micbias-lvl = <2600>;
		dlg,mic-amp-in-sel = "diff";
		pinctrl-names = "default";
		pinctrl-0 = <&headset_int_l>;
		VDD-supply = <&pp1800>;
		VDDMIC-supply = <&pp3300>;
		VDDIO-supply = <&pp1800>;

		da7219_aad {
			dlg,adc-1bit-rpt = <1>;
			dlg,btn-avg = <4>;
			dlg,btn-cfg = <50>;
			dlg,mic-det-thr = <500>;
			dlg,jack-ins-deb = <20>;
			dlg,jack-det-rate = "32ms_64ms";
			dlg,jack-rem-deb = <1>;

			dlg,a-d-btn-thr = <0xa>;
			dlg,d-b-btn-thr = <0x16>;
			dlg,b-c-btn-thr = <0x21>;
			dlg,c-mic-btn-thr = <0x3E>;
		};
	};
};

&i2s0 {
	status = "okay";
};

&i2s2 {
	status = "okay";
};

&io_domains {
	status = "okay";

	audio-supply = <&pp1800_audio>;		/* APIO5_VDD;  3d 4a */
	bt656-supply = <&pp1800_ap_io>;		/* APIO2_VDD;  2a 2b */
	gpio1830-supply = <&pp3000_ap>;		/* APIO4_VDD;  4c 4d */
	sdmmc-supply = <&ppvar_sd_card_io>;	/* SDMMC0_VDD; 4b    */
};

&pcie0 {
	status = "okay";

	ep-gpios = <&gpio2 27 GPIO_ACTIVE_HIGH>;
	pinctrl-names = "default";
	pinctrl-0 = <&pcie_clkreqn_cpm>, <&wifi_perst_l>;
	vpcie3v3-supply = <&pp3300_wifi_bt>;
	vpcie1v8-supply = <&wlan_pd_n>; /* HACK: see &wlan_pd_n */
	vpcie0v9-supply = <&pp900_pcie>;

	pci_rootport: pcie@0,0 {
		reg = <0x83000000 0x0 0x00000000 0x0 0x00000000>;
		#address-cells = <3>;
		#size-cells = <2>;
		ranges;
	};
};

&pcie_phy {
	status = "okay";
};

&pmu_io_domains {
	status = "okay";

	pmu1830-supply = <&pp1800_pmu>;		/* PMUIO2_VDD */
};

&pwm0 {
	status = "okay";
};

&pwm1 {
	status = "okay";
};

&pwm2 {
	status = "okay";
};

&pwm3 {
	status = "okay";
};

&sdhci {
	/*
	 * Signal integrity isn't great at 200 MHz and 150 MHz (DDR) gives the
	 * same (or nearly the same) performance for all eMMC that are intended
	 * to be used.
	 */
	assigned-clock-rates = <150000000>;

	bus-width = <8>;
	mmc-hs400-1_8v;
	mmc-hs400-enhanced-strobe;
	non-removable;
	status = "okay";
};

&sdmmc {
	status = "okay";

	/*
	 * Note: configure "sdmmc_cd" as card detect even though it's actually
	 * hooked to ground.  Because we specified "cd-gpios" below dw_mmc
	 * should be ignoring card detect anyway.  Specifying the pin as
	 * sdmmc_cd means that even if you've got GRF_SOC_CON7[12] (force_jtag)
	 * turned on that the system will still make sure the port is
	 * configured as SDMMC and not JTAG.
	 */
	pinctrl-names = "default";
	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_cd_gpio
		     &sdmmc_bus4>;

	bus-width = <4>;
	cap-mmc-highspeed;
	cap-sd-highspeed;
	cd-gpios = <&gpio4 24 GPIO_ACTIVE_LOW>;
	disable-wp;
	sd-uhs-sdr12;
	sd-uhs-sdr25;
	sd-uhs-sdr50;
	sd-uhs-sdr104;
	vmmc-supply = <&pp3000_sd_slot>;
	vqmmc-supply = <&ppvar_sd_card_io>;
};

&spi1 {
	status = "okay";

	pinctrl-names = "default", "sleep";
	pinctrl-1 = <&spi1_sleep>;

	spi_flash: spiflash@0 {
		u-boot,dm-pre-reloc;
		compatible = "jedec,spi-nor";
		reg = <0>;

		/* May run faster once verified. */
		spi-max-frequency = <10000000>;
	};
};

&spi2 {
	status = "okay";
};

&spi5 {
	status = "okay";
	spi-activate-delay = <100>;
	spi-max-frequency = <3000000>;
	spi-deactivate-delay = <200>;

	cros_ec: ec@0 {
		compatible = "google,cros-ec-spi";
		reg = <0>;
		interrupt-parent = <&gpio0>;
		interrupts = <1 IRQ_TYPE_LEVEL_LOW>;
		ec-interrupt = <&gpio0 1 GPIO_ACTIVE_LOW>;
		pinctrl-names = "default";
		pinctrl-0 = <&ec_ap_int_l>;
		spi-max-frequency = <3000000>;

		i2c_tunnel: i2c-tunnel {
			compatible = "google,cros-ec-i2c-tunnel";
			google,remote-bus = <4>;
			#address-cells = <1>;
			#size-cells = <0>;
		};

		usbc_extcon0: extcon@0 {
			compatible = "google,extcon-usbc-cros-ec";
			google,usb-port-id = <0>;

			#extcon-cells = <0>;
		};
	};
};

&tsadc {
	status = "okay";

	rockchip,hw-tshut-mode = <1>; /* tshut mode 0:CRU 1:GPIO */
	rockchip,hw-tshut-polarity = <1>; /* tshut polarity 0:LOW 1:HIGH */
};

&tcphy0 {
	status = "okay";
	extcon = <&usbc_extcon0>;
};

&u2phy0 {
	status = "okay";
};

&u2phy0_host {
	status = "okay";
};

&u2phy1_host {
	status = "okay";
};

&u2phy0_otg {
	status = "okay";
};

&u2phy1_otg {
	status = "okay";
};

&uart2 {
	status = "okay";
};

&usb_host0_ohci {
	status = "okay";
};

&usbdrd3_0 {
	status = "okay";
	extcon = <&usbc_extcon0>;
};

&usbdrd_dwc3_0 {
	status = "okay";
	dr_mode = "host";
};

&vopb {
	status = "okay";
};

&vopb_mmu {
	status = "okay";
};

&vopl {
	status = "okay";
};

&vopl_mmu {
	status = "okay";
};

#include <cros-ec-keyboard.dtsi>
#include <cros-ec-sbs.dtsi>

&pinctrl {
	/*
	 * pinctrl settings for pins that have no real owners.
	 *
	 * At the moment settings are identical for S0 and S3, but if we later
	 * need to configure things differently for S3 we'll adjust here.
	 */
	pinctrl-names = "default";
	pinctrl-0 = <
		&ap_pwroff	/* AP will auto-assert this when in S3 */
		&clk_32k	/* This pin is always 32k on gru boards */
	>;

	pcfg_output_low: pcfg-output-low {
		output-low;
	};

	pcfg_output_high: pcfg-output-high {
		output-high;
	};

	pcfg_pull_none_8ma: pcfg-pull-none-8ma {
		bias-disable;
		drive-strength = <8>;
	};

	backlight-enable {
		bl_en: bl-en {
			rockchip,pins = <1 17 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	cros-ec {
		ec_ap_int_l: ec-ap-int-l {
			rockchip,pins = <RK_GPIO0 1 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};

	discrete-regulators {
		sd_io_pwr_en: sd-io-pwr-en {
			rockchip,pins = <RK_GPIO2 2 RK_FUNC_GPIO
					 &pcfg_pull_none>;
		};

		sd_pwr_1800_sel: sd-pwr-1800-sel {
			rockchip,pins = <RK_GPIO2 28 RK_FUNC_GPIO
					 &pcfg_pull_none>;
		};

		sd_slot_pwr_en: sd-slot-pwr-en {
			rockchip,pins = <RK_GPIO4 29 RK_FUNC_GPIO
					 &pcfg_pull_none>;
		};
	};

	codec {
		/* Has external pullup */
		headset_int_l: headset-int-l {
			rockchip,pins = <1 23 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		mic_int: mic-int {
			rockchip,pins = <1 13 RK_FUNC_GPIO &pcfg_pull_down>;
		};
	};

	max98357a {
		sdmode_en: sdmode-en {
			rockchip,pins = <1 2 RK_FUNC_GPIO &pcfg_pull_down>;
		};
	};

	pcie {
		pcie_clkreqn_cpm: pci-clkreqn-cpm {
			/*
			 * Since our pcie doesn't support ClockPM(CPM), we want
			 * to hack this as gpio, so the EP could be able to
			 * de-assert it along and make ClockPM(CPM) work.
			 */
			rockchip,pins = <2 26 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	sdmmc {
		/*
		 * We run sdmmc at max speed; bump up drive strength.
		 * We also have external pulls, so disable the internal ones.
		 */
		sdmmc_bus4: sdmmc-bus4 {
			rockchip,pins =
				<4 8 RK_FUNC_1 &pcfg_pull_none_8ma>,
				<4 9 RK_FUNC_1 &pcfg_pull_none_8ma>,
				<4 10 RK_FUNC_1 &pcfg_pull_none_8ma>,
				<4 11 RK_FUNC_1 &pcfg_pull_none_8ma>;
		};

		sdmmc_clk: sdmmc-clk {
			rockchip,pins =
				<4 12 RK_FUNC_1 &pcfg_pull_none_8ma>;
		};

		sdmmc_cmd: sdmmc-cmd {
			rockchip,pins =
				<4 13 RK_FUNC_1 &pcfg_pull_none_8ma>;
		};

		/*
		 * In our case the official card detect is hooked to ground
		 * to avoid getting access to JTAG just by sticking something
		 * in the SD card slot (see the force_jtag bit in the TRM).
		 *
		 * We still configure it as card detect because it doesn't
		 * hurt and dw_mmc will ignore it.  We make sure to disable
		 * the pull though so we don't burn needless power.
		 */
		sdmmc_cd: sdmmc-cd {
			rockchip,pins =
				<0 7 RK_FUNC_1 &pcfg_pull_none>;
		};

		/* This is where we actually hook up CD; has external pull */
		sdmmc_cd_gpio: sdmmc-cd-gpio {
			rockchip,pins = <4 24 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	spi1 {
		spi1_sleep: spi1-sleep {
			/*
			 * Pull down SPI1 CLK/CS/RX/TX during suspend, to
			 * prevent leakage.
			 */
			rockchip,pins = <1 9 RK_FUNC_GPIO &pcfg_pull_down>,
					<1 10 RK_FUNC_GPIO &pcfg_pull_down>,
					<1 7 RK_FUNC_GPIO &pcfg_pull_down>,
					<1 8 RK_FUNC_GPIO &pcfg_pull_down>;
		};
	};

	touchscreen {
		touch_int_l: touch-int-l {
			rockchip,pins = <3 13 RK_FUNC_GPIO &pcfg_pull_up>;
		};

		touch_reset_l: touch-reset-l {
			rockchip,pins = <4 26 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

	trackpad {
		ap_i2c_tp_pu_en: ap-i2c-tp-pu-en {
			rockchip,pins = <3 12 RK_FUNC_GPIO &pcfg_output_high>;
		};

		trackpad_int_l: trackpad-int-l {
			rockchip,pins = <1 4 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};

	wifi: wifi {
		wlan_module_reset_l: wlan-module-reset-l {
			rockchip,pins = <1 11 RK_FUNC_GPIO &pcfg_pull_none>;
		};

		bt_host_wake_l: bt-host-wake-l {
			/* Kevin has an external pull up, but Gru does not */
			rockchip,pins = <0 3 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};

	write-protect {
		ap_fw_wp: ap-fw-wp {
			rockchip,pins = <1 18 RK_FUNC_GPIO &pcfg_pull_up>;
		};
	};
};