linux-kernel - [PATCH v2] arm64: dts: rockchip: add BT/wifi nodes to Pinephone Pro

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Message-Id: <20221002092809.451501-1-tom@tom-fitzhenry.me.uk>
Date:   Sun,  2 Oct 2022 20:28:09 +1100
From:   Tom Fitzhenry <tom@...-fitzhenry.me.uk>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     Ondrej Jirman <megi@....cz>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        phone-devel@...r.kernel.org,
        Tom Fitzhenry <tom@...-fitzhenry.me.uk>
Subject: [PATCH v2] arm64: dts: rockchip: add BT/wifi nodes to Pinephone Pro

Pinephone Pro includes a AzureWave AW-CM256SM wifi (sdio0) and
bt (uart0) combo module, which is based on Cypress
CYP43455 (BCM43455).

The CYP43455 datasheet ("Power-Up Sequence and Timing") documents:
* needing to wait 10ms between consecutive WL_REG_ON toggles
* needing to wait 110ms between power-on and SDIO access.

Signed-off-by: Tom Fitzhenry <tom@...-fitzhenry.me.uk>
Reviewed-by: Ondřej Jirman <megi@....cz>
---
Changes since v1:
* changed wifi power delays according to datasheet
* renamed sdio_pwrseq node to wifi_pwrseq
* reorder nodes alphabetically
---
 .../dts/rockchip/rk3399-pinephone-pro.dts     | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
index 2e058c315025..04403a76238b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -81,6 +81,27 @@ vcc1v8_codec: vcc1v8-codec-regulator {
 		regulator-max-microvolt = <1800000>;
 		vin-supply = <&vcc3v3_sys>;
 	};
+
+	wifi_pwrseq: sdio-wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		clocks = <&rk818 1>;
+		clock-names = "ext_clock";
+		pinctrl-names = "default";
+		pinctrl-0 = <&wifi_enable_h_pin>;
+		/*
+		 * Wait between power-on and SDIO access for CYP43455
+		 * POR circuit.
+		 */
+		post-power-on-delay-ms = <110>;
+		/*
+		 * Wait between consecutive toggles for CYP43455 CBUCK
+		 * regulator discharge.
+		 */
+		power-off-delay-us = <10000>;
+
+		/* WL_REG_ON on module */
+		reset-gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
+	};
 };
 
 &cpu_l0 {
@@ -360,11 +381,45 @@ vsel2_pin: vsel2-pin {
 		};
 	};
 
+	sdio-pwrseq {
+		wifi_enable_h_pin: wifi-enable-h-pin {
+			rockchip,pins = <0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	sound {
 		vcc1v8_codec_en: vcc1v8-codec-en {
 			rockchip,pins = <3 RK_PA4 RK_FUNC_GPIO &pcfg_pull_down>;
 		};
 	};
+
+	wireless-bluetooth {
+		bt_wake_pin: bt-wake-pin {
+			rockchip,pins = <2 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		bt_host_wake_pin: bt-host-wake-pin {
+			rockchip,pins = <0 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		bt_reset_pin: bt-reset-pin {
+			rockchip,pins = <0 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
+&sdio0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	disable-wp;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdio0_bus4 &sdio0_cmd &sdio0_clk>;
+	sd-uhs-sdr104;
+	status = "okay";
 };
 
 &sdmmc {
@@ -393,6 +448,27 @@ &tsadc {
 	status = "okay";
 };
 
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_xfer &uart0_cts &uart0_rts>;
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm4345c5";
+		clocks = <&rk818 1>;
+		clock-names = "lpo";
+		device-wakeup-gpios = <&gpio2 RK_PD2 GPIO_ACTIVE_HIGH>;
+		host-wakeup-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_HIGH>;
+		max-speed = <1500000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_host_wake_pin &bt_wake_pin &bt_reset_pin>;
+		shutdown-gpios = <&gpio0 RK_PB1 GPIO_ACTIVE_HIGH>;
+		vbat-supply = <&vcc3v3_sys>;
+		vddio-supply = <&vcc_1v8>;
+	};
+};
+
 &uart2 {
 	status = "okay";
 };

base-commit: b985063870727be3e94747b1c929219d04e77665
-- 
2.37.3