ASoC: rt5682: split i2c driver into separate module

With SND_SOC_AMD_RV_RT5682_MACH using the i2c version of the
driver, we can easily get a build failure when I2C is built-in
but soundwire is not:

 WARNING: unmet direct dependencies detected for SND_SOC_RT5682
   Depends on [m]: SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] && (I2C [=y] || SOUNDWIRE [=m]) && (SOUNDWIRE [=m] || !SOUNDWIRE [=m]) && (I2C [=y] || !I2C [=y])
   Selected by [y]:
   - SND_SOC_AMD_RV_RT5682_MACH [=y] && SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] && SND_SOC_AMD_ACP3x [=y] && I2C [=y] && CROS_EC [=y]
   Selected by [m]:
   - SND_SOC_RT5682_SDW [=m] && SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] && SOUNDWIRE [=m] && (I2C [=y] || !I2C [=y])

Rework the driver to have three separate modules, with the
main driver just dealing with the common bits and the actual
initialization as part of i2c and sdw specific modules.

The conversion is fairly mechanical to keep it easy to review,
i.e. it moves code around with the minimal required renaming
and changes.

Fixes: 6b8e4e7 ("ASoC: amd: Add machine driver for Raven based platform")
Fixes: fd443a2 ("ASoC: rt5682: fix I2C/Soundwire dependencies")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200528091851.2889754-1-arnd@arndb.de
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/Kconfig

@@ -29,7 +29,7 @@ config SND_SOC_AMD_ACP3x
 
 config SND_SOC_AMD_RV_RT5682_MACH
 	tristate "AMD RV support for RT5682"
-	select SND_SOC_RT5682
+	select SND_SOC_RT5682_I2C
 	select SND_SOC_MAX98357A
 	select SND_SOC_CROS_EC_CODEC
 	select I2C_CROS_EC_TUNNEL

sound/soc/codecs/Kconfig

@@ -168,7 +168,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_RT5668
 	imply SND_SOC_RT5670
 	imply SND_SOC_RT5677
-	imply SND_SOC_RT5682
+	imply SND_SOC_RT5682_I2C
 	imply SND_SOC_RT5682_SDW
 	imply SND_SOC_RT700_SDW
 	imply SND_SOC_RT711_SDW
@@ -1143,14 +1143,15 @@ config SND_SOC_RT5677_SPI
 
 config SND_SOC_RT5682
 	tristate
-	depends on I2C || SOUNDWIRE
-	depends on SOUNDWIRE || !SOUNDWIRE
-	depends on I2C || !I2C
+
+config SND_SOC_RT5682_I2C
+	tristate
+	depends on I2C
+	select SND_SOC_RT5682
 
 config SND_SOC_RT5682_SDW
 	tristate "Realtek RT5682 Codec - SDW"
 	depends on SOUNDWIRE
-	depends on I2C || !I2C
 	select SND_SOC_RT5682
 	select REGMAP_SOUNDWIRE
 

sound/soc/codecs/Makefile

@@ -179,6 +179,7 @@ snd-soc-rt5677-objs := rt5677.o
 snd-soc-rt5677-spi-objs := rt5677-spi.o
 snd-soc-rt5682-objs := rt5682.o
 snd-soc-rt5682-sdw-objs := rt5682-sdw.o
+snd-soc-rt5682-i2c-objs := rt5682-i2c.o
 snd-soc-rt700-objs := rt700.o rt700-sdw.o
 snd-soc-rt711-objs := rt711.o rt711-sdw.o
 snd-soc-rt715-objs := rt715.o rt715-sdw.o
@@ -481,6 +482,7 @@ obj-$(CONFIG_SND_SOC_RT5670)	+= snd-soc-rt5670.o
 obj-$(CONFIG_SND_SOC_RT5677)	+= snd-soc-rt5677.o
 obj-$(CONFIG_SND_SOC_RT5677_SPI)	+= snd-soc-rt5677-spi.o
 obj-$(CONFIG_SND_SOC_RT5682)	+= snd-soc-rt5682.o
+obj-$(CONFIG_SND_SOC_RT5682_I2C)	+= snd-soc-rt5682-i2c.o
 obj-$(CONFIG_SND_SOC_RT5682_SDW)	+= snd-soc-rt5682-sdw.o
 obj-$(CONFIG_SND_SOC_RT700)     += snd-soc-rt700.o
 obj-$(CONFIG_SND_SOC_RT711)     += snd-soc-rt711.o

sound/soc/codecs/rt5682-i2c.c

@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// rt5682.c  --  RT5682 ALSA SoC audio component driver
+//
+// Copyright 2018 Realtek Semiconductor Corp.
+// Author: Bard Liao <bardliao@realtek.com>
+//
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/acpi.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/mutex.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/jack.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/rt5682.h>
+
+#include "rl6231.h"
+#include "rt5682.h"
+
+static const struct rt5682_platform_data i2s_default_platform_data = {
+	.dmic1_data_pin = RT5682_DMIC1_DATA_GPIO2,
+	.dmic1_clk_pin = RT5682_DMIC1_CLK_GPIO3,
+	.jd_src = RT5682_JD1,
+	.btndet_delay = 16,
+	.dai_clk_names[RT5682_DAI_WCLK_IDX] = "rt5682-dai-wclk",
+	.dai_clk_names[RT5682_DAI_BCLK_IDX] = "rt5682-dai-bclk",
+};
+
+static const struct regmap_config rt5682_regmap = {
+	.reg_bits = 16,
+	.val_bits = 16,
+	.max_register = RT5682_I2C_MODE,
+	.volatile_reg = rt5682_volatile_register,
+	.readable_reg = rt5682_readable_register,
+	.cache_type = REGCACHE_RBTREE,
+	.reg_defaults = rt5682_reg,
+	.num_reg_defaults = RT5682_REG_NUM,
+	.use_single_read = true,
+	.use_single_write = true,
+};
+
+static void rt5682_jd_check_handler(struct work_struct *work)
+{
+	struct rt5682_priv *rt5682 = container_of(work, struct rt5682_priv,
+		jd_check_work.work);
+
+	if (snd_soc_component_read32(rt5682->component, RT5682_AJD1_CTRL)
+		& RT5682_JDH_RS_MASK) {
+		/* jack out */
+		rt5682->jack_type = rt5682_headset_detect(rt5682->component, 0);
+
+		snd_soc_jack_report(rt5682->hs_jack, rt5682->jack_type,
+			SND_JACK_HEADSET |
+			SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+			SND_JACK_BTN_2 | SND_JACK_BTN_3);
+	} else {
+		schedule_delayed_work(&rt5682->jd_check_work, 500);
+	}
+}
+
+static irqreturn_t rt5682_irq(int irq, void *data)
+{
+	struct rt5682_priv *rt5682 = data;
+
+	mod_delayed_work(system_power_efficient_wq,
+		&rt5682->jack_detect_work, msecs_to_jiffies(250));
+
+	return IRQ_HANDLED;
+}
+
+static struct snd_soc_dai_driver rt5682_dai[] = {
+	{
+		.name = "rt5682-aif1",
+		.id = RT5682_AIF1,
+		.playback = {
+			.stream_name = "AIF1 Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = RT5682_STEREO_RATES,
+			.formats = RT5682_FORMATS,
+		},
+		.capture = {
+			.stream_name = "AIF1 Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = RT5682_STEREO_RATES,
+			.formats = RT5682_FORMATS,
+		},
+		.ops = &rt5682_aif1_dai_ops,
+	},
+	{
+		.name = "rt5682-aif2",
+		.id = RT5682_AIF2,
+		.capture = {
+			.stream_name = "AIF2 Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = RT5682_STEREO_RATES,
+			.formats = RT5682_FORMATS,
+		},
+		.ops = &rt5682_aif2_dai_ops,
+	},
+};
+
+static int rt5682_i2c_probe(struct i2c_client *i2c,
+		const struct i2c_device_id *id)
+{
+	struct rt5682_platform_data *pdata = dev_get_platdata(&i2c->dev);
+	struct rt5682_priv *rt5682;
+	int i, ret;
+	unsigned int val;
+
+	rt5682 = devm_kzalloc(&i2c->dev, sizeof(struct rt5682_priv),
+		GFP_KERNEL);
+	if (!rt5682)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, rt5682);
+
+	rt5682->pdata = i2s_default_platform_data;
+
+	if (pdata)
+		rt5682->pdata = *pdata;
+	else
+		rt5682_parse_dt(rt5682, &i2c->dev);
+
+	rt5682->regmap = devm_regmap_init_i2c(i2c, &rt5682_regmap);
+	if (IS_ERR(rt5682->regmap)) {
+		ret = PTR_ERR(rt5682->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(rt5682->supplies); i++)
+		rt5682->supplies[i].supply = rt5682_supply_names[i];
+
+	ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(rt5682->supplies),
+				      rt5682->supplies);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(rt5682->supplies),
+				    rt5682->supplies);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	if (gpio_is_valid(rt5682->pdata.ldo1_en)) {
+		if (devm_gpio_request_one(&i2c->dev, rt5682->pdata.ldo1_en,
+					  GPIOF_OUT_INIT_HIGH, "rt5682"))
+			dev_err(&i2c->dev, "Fail gpio_request gpio_ldo\n");
+	}
+
+	/* Sleep for 300 ms miniumum */
+	usleep_range(300000, 350000);
+
+	regmap_write(rt5682->regmap, RT5682_I2C_MODE, 0x1);
+	usleep_range(10000, 15000);
+
+	regmap_read(rt5682->regmap, RT5682_DEVICE_ID, &val);
+	if (val != DEVICE_ID) {
+		dev_err(&i2c->dev,
+			"Device with ID register %x is not rt5682\n", val);
+		return -ENODEV;
+	}
+
+	mutex_init(&rt5682->calibrate_mutex);
+	rt5682_calibrate(rt5682);
+
+	rt5682_apply_patch_list(rt5682, &i2c->dev);
+
+	regmap_write(rt5682->regmap, RT5682_DEPOP_1, 0x0000);
+
+	/* DMIC pin*/
+	if (rt5682->pdata.dmic1_data_pin != RT5682_DMIC1_NULL) {
+		switch (rt5682->pdata.dmic1_data_pin) {
+		case RT5682_DMIC1_DATA_GPIO2: /* share with LRCK2 */
+			regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
+				RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO2);
+			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
+				RT5682_GP2_PIN_MASK, RT5682_GP2_PIN_DMIC_SDA);
+			break;
+
+		case RT5682_DMIC1_DATA_GPIO5: /* share with DACDAT1 */
+			regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
+				RT5682_DMIC_1_DP_MASK, RT5682_DMIC_1_DP_GPIO5);
+			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
+				RT5682_GP5_PIN_MASK, RT5682_GP5_PIN_DMIC_SDA);
+			break;
+
+		default:
+			dev_warn(&i2c->dev, "invalid DMIC_DAT pin\n");
+			break;
+		}
+
+		switch (rt5682->pdata.dmic1_clk_pin) {
+		case RT5682_DMIC1_CLK_GPIO1: /* share with IRQ */
+			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
+				RT5682_GP1_PIN_MASK, RT5682_GP1_PIN_DMIC_CLK);
+			break;
+
+		case RT5682_DMIC1_CLK_GPIO3: /* share with BCLK2 */
+			regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
+				RT5682_GP3_PIN_MASK, RT5682_GP3_PIN_DMIC_CLK);
+			break;
+
+		default:
+			dev_warn(&i2c->dev, "invalid DMIC_CLK pin\n");
+			break;
+		}
+	}
+
+	regmap_update_bits(rt5682->regmap, RT5682_PWR_ANLG_1,
+		RT5682_LDO1_DVO_MASK | RT5682_HP_DRIVER_MASK,
+		RT5682_LDO1_DVO_12 | RT5682_HP_DRIVER_5X);
+	regmap_write(rt5682->regmap, RT5682_MICBIAS_2, 0x0380);
+	regmap_update_bits(rt5682->regmap, RT5682_GPIO_CTRL_1,
+		RT5682_GP4_PIN_MASK | RT5682_GP5_PIN_MASK,
+		RT5682_GP4_PIN_ADCDAT1 | RT5682_GP5_PIN_DACDAT1);
+	regmap_write(rt5682->regmap, RT5682_TEST_MODE_CTRL_1, 0x0000);
+	regmap_update_bits(rt5682->regmap, RT5682_BIAS_CUR_CTRL_8,
+		RT5682_HPA_CP_BIAS_CTRL_MASK, RT5682_HPA_CP_BIAS_3UA);
+	regmap_update_bits(rt5682->regmap, RT5682_CHARGE_PUMP_1,
+		RT5682_CP_CLK_HP_MASK, RT5682_CP_CLK_HP_300KHZ);
+	regmap_update_bits(rt5682->regmap, RT5682_HP_CHARGE_PUMP_1,
+		RT5682_PM_HP_MASK, RT5682_PM_HP_HV);
+	regmap_update_bits(rt5682->regmap, RT5682_DMIC_CTRL_1,
+		RT5682_FIFO_CLK_DIV_MASK, RT5682_FIFO_CLK_DIV_2);
+
+	INIT_DELAYED_WORK(&rt5682->jack_detect_work,
+		rt5682_jack_detect_handler);
+	INIT_DELAYED_WORK(&rt5682->jd_check_work,
+		rt5682_jd_check_handler);
+
+	if (i2c->irq) {
+		ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
+			rt5682_irq, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
+			| IRQF_ONESHOT, "rt5682", rt5682);
+		if (ret)
+			dev_err(&i2c->dev, "Failed to reguest IRQ: %d\n", ret);
+	}
+
+	return devm_snd_soc_register_component(&i2c->dev,
+					       &rt5682_soc_component_dev,
+					       rt5682_dai, ARRAY_SIZE(rt5682_dai));
+}
+
+static void rt5682_i2c_shutdown(struct i2c_client *client)
+{
+	struct rt5682_priv *rt5682 = i2c_get_clientdata(client);
+
+	rt5682_reset(rt5682);
+}
+
+static const struct of_device_id rt5682_of_match[] = {
+	{.compatible = "realtek,rt5682i"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, rt5682_of_match);
+
+static const struct acpi_device_id rt5682_acpi_match[] = {
+	{"10EC5682", 0,},
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, rt5682_acpi_match);
+
+static const struct i2c_device_id rt5682_i2c_id[] = {
+	{"rt5682", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, rt5682_i2c_id);
+
+static struct i2c_driver rt5682_i2c_driver = {
+	.driver = {
+		.name = "rt5682",
+		.of_match_table = rt5682_of_match,
+		.acpi_match_table = rt5682_acpi_match,
+	},
+	.probe = rt5682_i2c_probe,
+	.shutdown = rt5682_i2c_shutdown,
+	.id_table = rt5682_i2c_id,
+};
+module_i2c_driver(rt5682_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC RT5682 driver");
+MODULE_AUTHOR("Bard Liao <bardliao@realtek.com>");
+MODULE_LICENSE("GPL v2");