ASoC: rt5668: add rt5668B codec driver

This is the initial codec driver for rt5668b.
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rt5668.txt

+RT5668B audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+- compatible : "realtek,rt5668b"
+
+- reg : The I2C address of the device.
+
+Optional properties:
+
+- interrupts : The CODEC's interrupt output.
+
+- realtek,dmic1-data-pin
+  0: dmic1 is not used
+  1: using GPIO2 pin as dmic1 data pin
+  2: using GPIO5 pin as dmic1 data pin
+
+- realtek,dmic1-clk-pin
+  0: using GPIO1 pin as dmic1 clock pin
+  1: using GPIO3 pin as dmic1 clock pin
+
+- realtek,jd-src
+  0: No JD is used
+  1: using JD1 as JD source
+
+- realtek,ldo1-en-gpios : The GPIO that controls the CODEC's LDO1_EN pin.
+
+Pins on the device (for linking into audio routes) for RT5668B:
+
+  * DMIC L1
+  * DMIC R1
+  * IN1P
+  * HPOL
+  * HPOR
+
+Example:
+
+rt5668 {
+	compatible = "realtek,rt5668b";
+	reg = <0x1a>;
+	interrupt-parent = <&gpio>;
+	interrupts = <TEGRA_GPIO(U, 6) GPIO_ACTIVE_HIGH>;
+	realtek,ldo1-en-gpios =
+		<&gpio TEGRA_GPIO(R, 2) GPIO_ACTIVE_HIGH>;
+	realtek,dmic1-data-pin = <1>;
+	realtek,dmic1-clk-pin = <1>;
+	realtek,jd-src = <1>;
+};

include/sound/rt5668.h

+/*
+ * linux/sound/rt5668.h -- Platform data for RT5668
+ *
+ * Copyright 2018 Realtek Microelectronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_SND_RT5668_H
+#define __LINUX_SND_RT5668_H
+
+enum rt5668_dmic1_data_pin {
+	RT5668_DMIC1_NULL,
+	RT5668_DMIC1_DATA_GPIO2,
+	RT5668_DMIC1_DATA_GPIO5,
+};
+
+enum rt5668_dmic1_clk_pin {
+	RT5668_DMIC1_CLK_GPIO1,
+	RT5668_DMIC1_CLK_GPIO3,
+};
+
+enum rt5668_jd_src {
+	RT5668_JD_NULL,
+	RT5668_JD1,
+};
+
+struct rt5668_platform_data {
+
+	int ldo1_en; /* GPIO for LDO1_EN */
+
+	enum rt5668_dmic1_data_pin dmic1_data_pin;
+	enum rt5668_dmic1_clk_pin dmic1_clk_pin;
+	enum rt5668_jd_src jd_src;
+};
+
+#endif
+

sound/soc/codecs/Kconfig

@@ -137,6 +137,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_RT5660 if I2C
 	select SND_SOC_RT5663 if I2C
 	select SND_SOC_RT5665 if I2C
+	select SND_SOC_RT5668 if I2C
 	select SND_SOC_RT5670 if I2C
 	select SND_SOC_RT5677 if I2C && SPI_MASTER
 	select SND_SOC_SGTL5000 if I2C
@@ -771,6 +772,7 @@ config SND_SOC_RL6231
 	default y if SND_SOC_RT5660=y
 	default y if SND_SOC_RT5663=y
 	default y if SND_SOC_RT5665=y
+	default y if SND_SOC_RT5668=y
 	default y if SND_SOC_RT5670=y
 	default y if SND_SOC_RT5677=y
 	default y if SND_SOC_RT1305=y
@@ -783,6 +785,7 @@ config SND_SOC_RL6231
 	default m if SND_SOC_RT5660=m
 	default m if SND_SOC_RT5663=m
 	default m if SND_SOC_RT5665=m
+	default m if SND_SOC_RT5668=m
 	default m if SND_SOC_RT5670=m
 	default m if SND_SOC_RT5677=m
 	default m if SND_SOC_RT1305=m
@@ -850,6 +853,9 @@ config SND_SOC_RT5663
 config SND_SOC_RT5665
 	tristate
 
+config SND_SOC_RT5668
+	tristate
+
 config SND_SOC_RT5670
 	tristate
 

sound/soc/codecs/Makefile

@@ -141,6 +141,7 @@ snd-soc-rt5659-objs := rt5659.o
 snd-soc-rt5660-objs := rt5660.o
 snd-soc-rt5663-objs := rt5663.o
 snd-soc-rt5665-objs := rt5665.o
+snd-soc-rt5668-objs := rt5668.o
 snd-soc-rt5670-objs := rt5670.o
 snd-soc-rt5677-objs := rt5677.o
 snd-soc-rt5677-spi-objs := rt5677-spi.o
@@ -396,6 +397,7 @@ obj-$(CONFIG_SND_SOC_RT5659)	+= snd-soc-rt5659.o
 obj-$(CONFIG_SND_SOC_RT5660)	+= snd-soc-rt5660.o
 obj-$(CONFIG_SND_SOC_RT5663)	+= snd-soc-rt5663.o
 obj-$(CONFIG_SND_SOC_RT5665)	+= snd-soc-rt5665.o
+obj-$(CONFIG_SND_SOC_RT5668)	+= snd-soc-rt5668.o
 obj-$(CONFIG_SND_SOC_RT5670)	+= snd-soc-rt5670.o
 obj-$(CONFIG_SND_SOC_RT5677)	+= snd-soc-rt5677.o
 obj-$(CONFIG_SND_SOC_RT5677_SPI)	+= snd-soc-rt5677-spi.o