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Message-Id: <20181107101308.7626-15-wens@csie.org>
Date:   Wed,  7 Nov 2018 18:13:07 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     linux-sunxi@...glegroups.com, Chen-Yu Tsai <wens@...e.org>,
        Loic Poulain <loic.poulain@...il.com>,
        linux-bluetooth@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 14/15] ARM: dts: sunxi: Enable Broadcom-based Bluetooth for multiple boards

This patch adds the Bluetooth node, and the underlying UART node if it's
missing, to the board device tree file for several boards. The LPO clock
is also added to the WiFi side's power sequencing node if it's missing,
to correctly represent the shared connections. There is also a PCM
connection for Bluetooth, but this is not covered in this patch.

These boards all have a WiFi+BT module from AMPAK, which contains one or
two Broadcom chips, depending on the model. The older AP6210 contains
two, while the newer AP6212 and AP6330 contain just one, as they use
two-in-one combo chips.

The Bluetooth side of the module is always connected to a UART on the
same pingroup as the SDIO pins for the WiFi side, in a 4 wire
configuration. Power to the VBAT and VDDIO pins are provided either by
the PMIC, using one or several of its regulator outputs, or other fixed
regulators on the board. The VBAT and VDDIO pins are shared with the
WiFi side, which would correspond to vmmc-supply and vqmmc-supply in the
mmc host node. A clock output from the SoC or the external X-Powers RTC
provides the LPO low power clock at 32.768 kHz.

All the boards covered in this patch are ones that do not require extra
changes to the SoC's dtsi file. For the remaining boards that I have
worked on, properties or device nodes for the LPO clock's source are
missing.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 arch/arm/boot/dts/sun7i-a20-cubietruck.dts    | 22 +++++++++++++++++++
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts  | 18 +++++++++++++++
 .../boot/dts/sun8i-a83t-cubietruck-plus.dts   | 18 +++++++++++++++
 arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts  | 14 ++++++++++++
 4 files changed, 72 insertions(+)

diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
index 5649161de1d7..ccbf3b7a062b 100644
--- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
+++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
@@ -103,6 +103,8 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&mmc3_pwrseq_pin_cubietruck>;
 		reset-gpios = <&pio 7 9 GPIO_ACTIVE_LOW>; /* PH9 WIFI_EN */
+		clocks = <&ccu CLK_OUT_A>;
+		clock-names = "ext_clock";
 	};
 
 	sound {
@@ -246,6 +248,10 @@
 };
 
 &pio {
+	/* Pin outputs low power clock for WiFi and BT */
+	pinctrl-0 = <&clk_out_a_pins_a>;
+	pinctrl-names = "default";
+
 	ahci_pwr_pin_cubietruck: ahci_pwr_pin@1 {
 		pins = "PH12";
 		function = "gpio_out";
@@ -350,6 +356,22 @@
 	status = "okay";
 };
 
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pins_a>;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm20702a1";
+		clocks = <&ccu CLK_OUT_A>;
+		clock-names = "lpo";
+		device-wakeup-gpios = <&pio 7 24 GPIO_ACTIVE_LOW>; /* PH24 */
+		host-wakeup-gpios = <&pio 7 25 GPIO_ACTIVE_LOW>; /* PH25 */
+		shutdown-gpios = <&pio 7 18 GPIO_ACTIVE_HIGH>; /* PH18 */
+		max-speed = <1500000>;
+	};
+};
+
 &usb_otg {
 	dr_mode = "otg";
 	status = "okay";
diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
index 742d2946b08b..c21320c4f4c2 100644
--- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
@@ -363,6 +363,24 @@
 	status = "okay";
 };
 
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		clocks = <&ac100_rtc 1>;
+		clock-names = "lpo";
+		vbat-supply = <&reg_dldo1>;
+		vddio-supply = <&reg_dldo1>;
+		device-wakeup-gpios = <&pio 7 9 GPIO_ACTIVE_HIGH>; /* PH9 */
+		host-wakeup-gpios = <&r_pio 0 5 GPIO_ACTIVE_HIGH>; /* PL5 */
+		shutdown-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PL4 */
+	};
+};
+
 &usbphy {
 	usb1_vbus-supply = <&reg_usb1_vbus>;
 	status = "okay";
diff --git a/arch/arm/boot/dts/sun8i-a83t-cubietruck-plus.dts b/arch/arm/boot/dts/sun8i-a83t-cubietruck-plus.dts
index e5f0645e53a7..a5a9f5a0603e 100644
--- a/arch/arm/boot/dts/sun8i-a83t-cubietruck-plus.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-cubietruck-plus.dts
@@ -394,6 +394,24 @@
 	status = "okay";
 };
 
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
+	uart-has-rtscts;
+	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm4330-bt";
+		clocks = <&ac100_rtc 1>;
+		clock-names = "lpo";
+		vbat-supply = <&reg_dcdc1>;
+		vddio-supply = <&reg_sw>;
+		device-wakeup-gpios = <&r_pio 0 10 GPIO_ACTIVE_HIGH>; /* PL10 */
+		host-wakeup-gpios = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */
+		shutdown-gpios = <&r_pio 0 4 GPIO_ACTIVE_HIGH>; /* PL4 */
+	};
+};
+
 &usbphy {
 	usb1_vbus-supply = <&reg_usb1_vbus>;
 	usb2_vbus-supply = <&reg_usb2_vbus>;
diff --git a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
index 0dbdb29a8fff..b85acca94441 100644
--- a/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
+++ b/arch/arm/boot/dts/sun8i-r16-bananapi-m2m.dts
@@ -91,6 +91,8 @@
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&r_pio 0 6 GPIO_ACTIVE_LOW>; /* PL06 */
+		clocks = <&rtc 1>;
+		clock-names = "ext_clock";
 	};
 };
 
@@ -299,7 +301,19 @@
 &uart1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart1_pins_a>, <&uart1_pins_cts_rts_a>;
+	uart-has-rtscts;
 	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		clocks = <&rtc 1>;
+		clock-names = "lpo";
+		vbat-supply = <&reg_dldo1>;
+		vddio-supply = <&reg_aldo3>;
+		device-wakeup-gpios = <&r_pio 0 10 GPIO_ACTIVE_HIGH>; /* PL10 */
+		host-wakeup-gpios = <&r_pio 0 9 GPIO_ACTIVE_HIGH>; /* PL9 */
+		shutdown-gpios = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */
+	};
 };
 
 &usb_otg {
-- 
2.19.1

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