[PATCH v3 6/6] ARM: dts: Add dts for RPi4b + Cirrus Logic Lochnagar2 + CS47L15

[Richard Fitzgerald <rf@opensource.cirrus.com>]

This adds a devicetree configuration for Raspberry Pi 4b connected to
Cirrus Logic Lochnagar 2 audio development board and CS47L15 codec.

The common (codec-independent) Lochnagar 2 configuration is separated
into a dtsi to simplify re-using it for other codecs.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 MAINTAINERS                                   |   1 +
 arch/arm/boot/dts/Makefile                    |   1 +
 ...bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dts | 186 ++++++++++++++++
 .../dts/bcm2711-rpi4b-cirrus-lochnagar.dtsi   | 201 ++++++++++++++++++
 4 files changed, 389 insertions(+)
 create mode 100644 arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dts
 create mode 100644 arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar.dtsi

diff --git a/MAINTAINERS b/MAINTAINERS
index 5cc595ac7b28..7dca1db52144 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4193,6 +4193,7 @@ M:	Charles Keepax <ckeepax@opensource.cirrus.com>
 M:	Richard Fitzgerald <rf@opensource.cirrus.com>
 L:	patches@opensource.cirrus.com
 S:	Supported
+F:	arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar*
 F:	Documentation/devicetree/bindings/clock/cirrus,lochnagar.yaml
 F:	Documentation/devicetree/bindings/hwmon/cirrus,lochnagar.yaml
 F:	Documentation/devicetree/bindings/mfd/cirrus,lochnagar.yaml
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index ce66ffd5a1bb..240cc58fd954 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -93,6 +93,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2837-rpi-3-b-plus.dtb \
 	bcm2837-rpi-cm3-io3.dtb \
 	bcm2711-rpi-4-b.dtb \
+	bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dtb \
 	bcm2835-rpi-zero.dtb \
 	bcm2835-rpi-zero-w.dtb
 dtb-$(CONFIG_ARCH_BCM_5301X) += \
diff --git a/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dts b/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dts
new file mode 100644
index 000000000000..b6b91289bc6f
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar-cs47l15.dts
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2711-rpi4b-cirrus-lochnagar.dtsi"
+#include <dt-bindings/sound/madera.h>
+
+/ {
+	sound {
+		status = "okay";
+
+		compatible = "audio-graph-card";
+		label = "sound-card-cs47l15";
+
+		clocks = <&clk_24m>, <&fll1_out>, <&fll1_dsp>;
+		clock-names = "ln-clk-24m", "fll1-out", "fll1-dsp";
+
+		plls = <
+			&cs47l15 MADERA_FLL1_REFCLK MADERA_FLL_SRC_MCLK1 98304000
+		>;
+		plls-clocks = "ln-clk-24m";
+
+		sysclks = <
+			&cs47l15 MADERA_CLK_SYSCLK_1 MADERA_CLK_SRC_FLL1 0
+			&cs47l15 MADERA_CLK_DSPCLK   MADERA_CLK_SRC_FLL1 0
+		>;
+		sysclks-clocks = "fll1-out", "fll1-dsp";
+
+		widgets = "Microphone", "Microphone Jack",
+			  "Headphone", "Headphone Jack";
+
+		routing = "Microphone Jack", "MICBIAS1A",
+			  "IN1BRN", "Microphone Jack",
+			  "IN1BRP", "Microphone Jack",
+			  "Headphone Jack", "HPOUTL",
+			  "Headphone Jack", "HPOUTR";
+
+		dais = <&cpu_i2s_port &cs47l15_trace_port>;
+
+		/* Main output from FLL1 */
+		fll1_out: fll1_out {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <98304000>;
+		};
+
+		/* x1.5 DSP output from FLL1 */
+		fll1_dsp: fll1_dsp {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <147456000>;
+		};
+	};
+};
+
+&i2s {
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu_i2s_port: port@0 {
+			reg = <0>;
+			cpu_i2s_ep: endpoint {
+				remote-endpoint = <&cs47l15_aif1>;
+				dai-format = "i2s";
+			};
+		};
+	};
+};
+
+&spi {
+	status = "okay";
+
+	cs47l15: cs47l15@1 {
+		status = "okay";
+
+		compatible = "cirrus,cs47l15";
+		reg = <0x1>;
+
+		spi-max-frequency = <11000000>;
+
+		interrupts = <27 8>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		interrupt-parent = <&gpio>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		#sound-dai-cells = <1>;
+
+		AVDD-supply = <&lochnagar_vdd1v8>;
+		DCVDD-supply = <&lochnagar_vddcore>;
+		DBVDD1-supply = <&lochnagar_vdd1v8>;
+		CPVDD1-supply = <&lochnagar_vdd1v8>;
+		SPKVDD-supply = <&wallvdd>;
+		MICVDD-supply = <&lochnagar_micvdd>;
+
+		reset-gpios = <&lochnagar_pin 0 0>;
+
+		cirrus,dmic-ref = <
+			MADERA_DMIC_REF_MICBIAS1
+		>;
+		cirrus,inmode = <
+			MADERA_INMODE_SE   MADERA_INMODE_SE   /* IN1A */
+			MADERA_INMODE_DIFF MADERA_INMODE_DIFF /* IN1B */
+			MADERA_INMODE_SE   MADERA_INMODE_SE   /* IN2A */
+			MADERA_INMODE_DIFF MADERA_INMODE_DIFF /* IN2B */
+		>;
+
+		clocks = <&lochnagar_clk LOCHNAGAR_CDC_MCLK1>,
+			 <&lochnagar_clk LOCHNAGAR_CDC_MCLK2>;
+		clock-names = "mclk1", "mclk2";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&cdc_irq &cs47l15_defaults>;
+
+		cs47l15_defaults: cs47l15-gpio-defaults {
+			aif1 {
+				groups = "aif1";
+				function = "aif1";
+				bias-bus-hold;
+			};
+			aif2 {
+				groups = "aif2";
+				function = "aif2";
+				bias-bus-hold;
+			};
+			aif3 {
+				groups = "aif3";
+				function = "aif3";
+				bias-bus-hold;
+			};
+			pdmspk1 {
+				groups = "pdmspk1";
+				function = "pdmspk1";
+			};
+		};
+
+		micvdd {
+			regulator-min-microvolt = <3000000>;
+			regulator-max-microvolt = <3000000>;
+		};
+
+		MICBIAS1 {
+			regulator-min-microvolt = <2800000>;
+			regulator-max-microvolt = <2800000>;
+		};
+		MICBIAS1A {
+			regulator-active-discharge = <1>;
+		};
+		MICBIAS1B {
+			regulator-active-discharge = <1>;
+		};
+		MICBIAS1C {
+			regulator-active-discharge = <1>;
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			cs47l15_aif1_port: port@0 {
+				reg = <0>;
+				cs47l15_aif1: endpoint {
+					remote-endpoint = <&cpu_i2s_ep>;
+					bitclock-master;
+					frame-master;
+					system-clock-frequency = <0>;
+					mclk-fs = <0>;
+				};
+			};
+			/* Debug trace compressed stream */
+			cs47l15_trace_port: port@3 {
+				reg = <3>;
+				cs47l15_trace_cpu: endpoint {
+					remote-endpoint = <&cs47l15_trace_codec>;
+					system-clock-frequency = <0>;
+					mclk-fs = <0>;
+				};
+			};
+			port@4 {
+				reg = <4>;
+				cs47l15_trace_codec: endpoint {
+					remote-endpoint = <&cs47l15_trace_cpu>;
+					system-clock-frequency = <0>;
+					mclk-fs = <0>;
+				};
+			};
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar.dtsi b/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar.dtsi
new file mode 100644
index 000000000000..af498d7ad18a
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar.dtsi
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2711-rpi-4-b.dts"
+#include <dt-bindings/clk/lochnagar.h>
+#include <dt-bindings/pinctrl/bcm2835.h>
+#include <dt-bindings/pinctrl/lochnagar.h>
+
+/ {
+	wallvdd: wallvdd@0 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "WALL_VDD_5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+};
+
+&gpio {
+	lochnagar_present: lochnagar_present {
+		brcm,pins = <22>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	lochnagar_reset: lochnagar_reset {
+		brcm,pins = <24>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	cdc_irq: cdc_irq {
+		brcm,pins = <27>;
+		brcm,function = <BCM2835_FSEL_GPIO_IN>;
+	};
+
+	spi_pins: spi_pins {
+		brcm,pins = <9 10 11>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+	};
+
+	spi_cs: spi_cs {
+		brcm,pins = <7 8>;
+		brcm,function = <BCM2835_FSEL_GPIO_OUT>;
+	};
+
+	i2s_pins: i2s_pins {
+		brcm,pins = <18 19 20 21>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+	};
+};
+
+&i2s {
+	status = "okay";
+	#sound-dai-cells = <1>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s_pins>;
+	dmas = <&dma 2>, <&dma 3>;
+	dma-names = "tx", "rx";
+};
+
+&i2c1 {
+	status = "okay";
+
+	lochnagar: lochnagar@22 {
+		status = "okay";
+
+		compatible = "cirrus,lochnagar2";
+		reg = <0x22>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&lochnagar_present &lochnagar_reset>;
+
+		reset-gpio = <&gpio 24 0>;
+		present-gpio = <&gpio 22 0>;
+
+		lochnagar_vdd1v8: VDD1V8 {
+			compatible = "regulator-fixed";
+
+			regulator-name = "VDD1V8";
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <1800000>;
+			regulator-boot-on;
+			regulator-always-on;
+
+			vin-supply = <&wallvdd>;
+		};
+
+		clk_pmic: clk_pmic {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <32768>;
+		};
+		clk_24m: clk_24m {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <24576000>;
+		};
+
+		lochnagar_clk: clk {
+			compatible = "cirrus,lochnagar2-clk";
+
+			#clock-cells = <1>;
+
+			clocks = <&clk_pmic>, <&clk_24m>;
+			clock-names = "ln-pmic-32k", "ln-clk-24m";
+
+			assigned-clocks = <&lochnagar_clk LOCHNAGAR_CDC_MCLK1>,
+					  <&lochnagar_clk LOCHNAGAR_CDC_MCLK2>,
+					  <&lochnagar_clk LOCHNAGAR_SOUNDCARD_MCLK>;
+			assigned-clock-parents = <&clk_24m>,
+						 <&clk_pmic>,
+						 <&clk_24m>;
+		};
+
+		lochnagar_pin: pin {
+			compatible = "cirrus,lochnagar-pinctrl";
+
+			gpio-controller;
+			#gpio-cells = <2>;
+			gpio-ranges = <&lochnagar_pin 0 0 LOCHNAGAR2_PIN_NUM_GPIOS>;
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&pin_settings>;
+
+			pin_settings: pin_settings {
+				rpi_aif {
+					input-enable;
+					groups = "gf-aif1";
+					function = "codec-aif1";
+				};
+				codec_aif1 {
+					output-master;
+					groups = "codec-aif1";
+					function = "gf-aif1";
+				};
+				sc_codec_aif {
+					output-enable;
+					groups = "codec-aif2";
+					function = "soundcard-aif";
+				};
+				sc_lochnagar_aif {
+					input-enable;
+					groups = "soundcard-aif";
+					function = "codec-aif2";
+				};
+			};
+		};
+
+		lochnagar_hwmon: hwmon {
+			compatible = "cirrus,lochnagar2-hwmon";
+		};
+
+		lochnagar_micvdd: MICVDD {
+			compatible = "cirrus,lochnagar2-micvdd";
+
+			SYSVDD-supply = <&wallvdd>;
+
+			regulator-min-microvolt = <3000000>;
+			regulator-max-microvolt = <3000000>;
+		};
+
+		MIC1VDD {
+			compatible = "cirrus,lochnagar2-mic1vdd";
+
+			regulator-always-on;
+			cirrus,micbias-input = <2>;
+		};
+
+		MIC2VDD {
+			compatible = "cirrus,lochnagar2-mic2vdd";
+
+			regulator-always-on;
+			cirrus,micbias-input = <3>;
+		};
+
+		lochnagar_vddcore: VDDCORE {
+			compatible = "cirrus,lochnagar2-vddcore";
+
+			SYSVDD-supply = <&wallvdd>;
+
+			regulator-min-microvolt = <1200000>;
+			regulator-max-microvolt = <1200000>;
+		};
+
+		lochnagar_sc: soundcard {
+			compatible = "cirrus,lochnagar2-soundcard";
+
+			#sound-dai-cells = <1>;
+
+			clocks = <&lochnagar_clk LOCHNAGAR_SOUNDCARD_MCLK>;
+			clock-names = "mclk";
+		};
+	};
+};
+
+&spi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi_pins &spi_cs>;
+	cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
+};
-- 
2.20.1