[mirror_ubuntu-artful-kernel.git] / drivers / mfd / wm8994-core.c

/*
 * wm8994-core.c  --  Device access for Wolfson WM8994
 *
 * Copyright 2009 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>

#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/pdata.h>
#include <linux/mfd/wm8994/registers.h>

#include "wm8994.h"

static const struct mfd_cell wm8994_regulator_devs[] = {
	{
		.name = "wm8994-ldo",
		.id = 0,
		.pm_runtime_no_callbacks = true,
	},
	{
		.name = "wm8994-ldo",
		.id = 1,
		.pm_runtime_no_callbacks = true,
	},
};

static struct resource wm8994_codec_resources[] = {
	{
		.start = WM8994_IRQ_TEMP_SHUT,
		.end   = WM8994_IRQ_TEMP_WARN,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource wm8994_gpio_resources[] = {
	{
		.start = WM8994_IRQ_GPIO(1),
		.end   = WM8994_IRQ_GPIO(11),
		.flags = IORESOURCE_IRQ,
	},
};

static const struct mfd_cell wm8994_devs[] = {
	{
		.name = "wm8994-codec",
		.num_resources = ARRAY_SIZE(wm8994_codec_resources),
		.resources = wm8994_codec_resources,
	},

	{
		.name = "wm8994-gpio",
		.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
		.resources = wm8994_gpio_resources,
		.pm_runtime_no_callbacks = true,
	},
};

/*
 * Supplies for the main bulk of CODEC; the LDO supplies are ignored
 * and should be handled via the standard regulator API supply
 * management.
 */
static const char *wm1811_main_supplies[] = {
	"DBVDD1",
	"DBVDD2",
	"DBVDD3",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

static const char *wm8994_main_supplies[] = {
	"DBVDD",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

static const char *wm8958_main_supplies[] = {
	"DBVDD1",
	"DBVDD2",
	"DBVDD3",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

#ifdef CONFIG_PM
static int wm8994_suspend(struct device *dev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	int ret;

	/* Don't actually go through with the suspend if the CODEC is
	 * still active for accessory detect. */
	switch (wm8994->type) {
	case WM8958:
	case WM1811:
		ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
		if (ret < 0) {
			dev_err(dev, "Failed to read power status: %d\n", ret);
		} else if (ret & WM8958_MICD_ENA) {
			dev_dbg(dev, "CODEC still active, ignoring suspend\n");
			return 0;
		}
		break;
	default:
		break;
	}

	/* Disable LDO pulldowns while the device is suspended if we
	 * don't know that something will be driving them. */
	if (!wm8994->ldo_ena_always_driven)
		wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);

	/* Explicitly put the device into reset in case regulators
	 * don't get disabled in order to ensure consistent restart.
	 */
	wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
			 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));

	regcache_mark_dirty(wm8994->regmap);

	/* Restore GPIO registers to prevent problems with mismatched
	 * pin configurations.
	 */
	ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
				   WM8994_GPIO_11);
	if (ret != 0)
		dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);

	/* In case one of the GPIOs is used as a wake input. */
	ret = regcache_sync_region(wm8994->regmap,
				   WM8994_INTERRUPT_STATUS_1_MASK,
				   WM8994_INTERRUPT_STATUS_1_MASK);
	if (ret != 0)
		dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);

	regcache_cache_only(wm8994->regmap, true);
	wm8994->suspended = true;

	ret = regulator_bulk_disable(wm8994->num_supplies,
				     wm8994->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to disable supplies: %d\n", ret);
		return ret;
	}

	return 0;
}

static int wm8994_resume(struct device *dev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	int ret;

	/* We may have lied to the PM core about suspending */
	if (!wm8994->suspended)
		return 0;

	ret = regulator_bulk_enable(wm8994->num_supplies,
				    wm8994->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	regcache_cache_only(wm8994->regmap, false);
	ret = regcache_sync(wm8994->regmap);
	if (ret != 0) {
		dev_err(dev, "Failed to restore register map: %d\n", ret);
		goto err_enable;
	}

	/* Disable LDO pulldowns while the device is active */
	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
			0);

	wm8994->suspended = false;

	return 0;

err_enable:
	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);

	return ret;
}
#endif

#ifdef CONFIG_REGULATOR
static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
{
	struct wm8994_ldo_pdata *ldo_pdata;

	if (!pdata)
		return 0;

	ldo_pdata = &pdata->ldo[ldo];

	if (!ldo_pdata->init_data)
		return 0;

	return ldo_pdata->init_data->num_consumer_supplies != 0;
}
#else
static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
{
	return 0;
}
#endif

static const struct reg_sequence wm8994_revc_patch[] = {
	{ 0x102, 0x3 },
	{ 0x56, 0x3 },
	{ 0x817, 0x0 },
	{ 0x102, 0x0 },
};

static const struct reg_sequence wm8958_reva_patch[] = {
	{ 0x102, 0x3 },
	{ 0xcb, 0x81 },
	{ 0x817, 0x0 },
	{ 0x102, 0x0 },
};

static const struct reg_sequence wm1811_reva_patch[] = {
	{ 0x102, 0x3 },
	{ 0x56, 0xc07 },
	{ 0x5d, 0x7e },
	{ 0x5e, 0x0 },
	{ 0x102, 0x0 },
};

#ifdef CONFIG_OF
static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
{
	struct device_node *np = wm8994->dev->of_node;
	struct wm8994_pdata *pdata = &wm8994->pdata;
	int i;

	if (!np)
		return 0;

	if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
				       ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
		for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
			if (wm8994->pdata.gpio_defaults[i] == 0)
				pdata->gpio_defaults[i]
					= WM8994_CONFIGURE_GPIO;
		}
	}

	of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
				   ARRAY_SIZE(pdata->micbias));

	pdata->lineout1_diff = true;
	pdata->lineout2_diff = true;
	if (of_find_property(np, "wlf,lineout1-se", NULL))
		pdata->lineout1_diff = false;
	if (of_find_property(np, "wlf,lineout2-se", NULL))
		pdata->lineout2_diff = false;

	if (of_find_property(np, "wlf,lineout1-feedback", NULL))
		pdata->lineout1fb = true;
	if (of_find_property(np, "wlf,lineout2-feedback", NULL))
		pdata->lineout2fb = true;

	if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
		pdata->lineout2fb = true;

	pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
	if (pdata->ldo[0].enable < 0)
		pdata->ldo[0].enable = 0;

	pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
	if (pdata->ldo[1].enable < 0)
		pdata->ldo[1].enable = 0;

	return 0;
}
#else
static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
{
	return 0;
}
#endif

/*
 * Instantiate the generic non-control parts of the device.
 */
static int wm8994_device_init(struct wm8994 *wm8994, int irq)
{
	struct wm8994_pdata *pdata;
	struct regmap_config *regmap_config;
	const struct reg_sequence *regmap_patch = NULL;
	const char *devname;
	int ret, i, patch_regs = 0;
	int pulls = 0;

	if (dev_get_platdata(wm8994->dev)) {
		pdata = dev_get_platdata(wm8994->dev);
		wm8994->pdata = *pdata;
	}
	pdata = &wm8994->pdata;

	ret = wm8994_set_pdata_from_of(wm8994);
	if (ret != 0)
		return ret;

	dev_set_drvdata(wm8994->dev, wm8994);

	/* Add the on-chip regulators first for bootstrapping */
	ret = mfd_add_devices(wm8994->dev, 0,
			      wm8994_regulator_devs,
			      ARRAY_SIZE(wm8994_regulator_devs),
			      NULL, 0, NULL);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
		goto err;
	}

	switch (wm8994->type) {
	case WM1811:
		wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
		break;
	case WM8994:
		wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
		break;
	case WM8958:
		wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
		break;
	default:
		BUG();
		goto err;
	}

	wm8994->supplies = devm_kzalloc(wm8994->dev,
					sizeof(struct regulator_bulk_data) *
					wm8994->num_supplies, GFP_KERNEL);
	if (!wm8994->supplies) {
		ret = -ENOMEM;
		goto err;
	}

	switch (wm8994->type) {
	case WM1811:
		for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
			wm8994->supplies[i].supply = wm1811_main_supplies[i];
		break;
	case WM8994:
		for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
			wm8994->supplies[i].supply = wm8994_main_supplies[i];
		break;
	case WM8958:
		for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
			wm8994->supplies[i].supply = wm8958_main_supplies[i];
		break;
	default:
		BUG();
		goto err;
	}

	/*
	 * Can't use devres helper here as some of the supplies are provided by
	 * wm8994->dev's children (regulators) and those regulators are
	 * unregistered by the devres core before the supplies are freed.
	 */
	ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
				 wm8994->supplies);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
		goto err;
	}

	ret = regulator_bulk_enable(wm8994->num_supplies, wm8994->supplies);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
		goto err_regulator_free;
	}

	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
	if (ret < 0) {
		dev_err(wm8994->dev, "Failed to read ID register\n");
		goto err_enable;
	}
	switch (ret) {
	case 0x1811:
		devname = "WM1811";
		if (wm8994->type != WM1811)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM1811;
		break;
	case 0x8994:
		devname = "WM8994";
		if (wm8994->type != WM8994)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM8994;
		break;
	case 0x8958:
		devname = "WM8958";
		if (wm8994->type != WM8958)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM8958;
		break;
	default:
		dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
			ret);
		ret = -EINVAL;
		goto err_enable;
	}

	ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
	if (ret < 0) {
		dev_err(wm8994->dev, "Failed to read revision register: %d\n",
			ret);
		goto err_enable;
	}
	wm8994->revision = ret & WM8994_CHIP_REV_MASK;
	wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;

	switch (wm8994->type) {
	case WM8994:
		switch (wm8994->revision) {
		case 0:
		case 1:
			dev_warn(wm8994->dev,
				 "revision %c not fully supported\n",
				 'A' + wm8994->revision);
			break;
		case 2:
		case 3:
		default:
			regmap_patch = wm8994_revc_patch;
			patch_regs = ARRAY_SIZE(wm8994_revc_patch);
			break;
		}
		break;

	case WM8958:
		switch (wm8994->revision) {
		case 0:
			regmap_patch = wm8958_reva_patch;
			patch_regs = ARRAY_SIZE(wm8958_reva_patch);
			break;
		default:
			break;
		}
		break;

	case WM1811:
		/* Revision C did not change the relevant layer */
		if (wm8994->revision > 1)
			wm8994->revision++;

		regmap_patch = wm1811_reva_patch;
		patch_regs = ARRAY_SIZE(wm1811_reva_patch);
		break;

	default:
		break;
	}

	dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
		 'A' + wm8994->revision, wm8994->cust_id);

	switch (wm8994->type) {
	case WM1811:
		regmap_config = &wm1811_regmap_config;
		break;
	case WM8994:
		regmap_config = &wm8994_regmap_config;
		break;
	case WM8958:
		regmap_config = &wm8958_regmap_config;
		break;
	default:
		dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
		return -EINVAL;
	}

	ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
			ret);
		return ret;
	}

	/* Explicitly put the device into reset in case regulators
	 * don't get disabled in order to ensure we know the device
	 * state.
	 */
	ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
			       wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to reset device: %d\n", ret);
		return ret;
	}

	if (regmap_patch) {
		ret = regmap_register_patch(wm8994->regmap, regmap_patch,
					    patch_regs);
		if (ret != 0) {
			dev_err(wm8994->dev, "Failed to register patch: %d\n",
				ret);
			goto err;
		}
	}

	wm8994->irq_base = pdata->irq_base;
	wm8994->gpio_base = pdata->gpio_base;

	/* GPIO configuration is only applied if it's non-zero */
	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
		if (pdata->gpio_defaults[i]) {
			wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
					0xffff, pdata->gpio_defaults[i]);
		}
	}

	wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;

	if (pdata->spkmode_pu)
		pulls |= WM8994_SPKMODE_PU;

	/* Disable unneeded pulls */
	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
			WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
			pulls);

	/* In some system designs where the regulators are not in use,
	 * we can achieve a small reduction in leakage currents by
	 * floating LDO outputs.  This bit makes no difference if the
	 * LDOs are enabled, it only affects cases where the LDOs were
	 * in operation and are then disabled.
	 */
	for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
		if (wm8994_ldo_in_use(pdata, i))
			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
					WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
		else
			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
					WM8994_LDO1_DISCH, 0);
	}

	wm8994_irq_init(wm8994);

	ret = mfd_add_devices(wm8994->dev, -1,
			      wm8994_devs, ARRAY_SIZE(wm8994_devs),
			      NULL, 0, NULL);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
		goto err_irq;
	}

	pm_runtime_enable(wm8994->dev);
	pm_runtime_idle(wm8994->dev);

	return 0;

err_irq:
	wm8994_irq_exit(wm8994);
err_enable:
	regulator_bulk_disable(wm8994->num_supplies,
			       wm8994->supplies);
err_regulator_free:
	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
err:
	mfd_remove_devices(wm8994->dev);
	return ret;
}

static void wm8994_device_exit(struct wm8994 *wm8994)
{
	pm_runtime_disable(wm8994->dev);
	wm8994_irq_exit(wm8994);
	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
	mfd_remove_devices(wm8994->dev);
}

static const struct of_device_id wm8994_of_match[] = {
	{ .compatible = "wlf,wm1811", .data = (void *)WM1811 },
	{ .compatible = "wlf,wm8994", .data = (void *)WM8994 },
	{ .compatible = "wlf,wm8958", .data = (void *)WM8958 },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8994_of_match);

static int wm8994_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	const struct of_device_id *of_id;
	struct wm8994 *wm8994;
	int ret;

	wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
	if (wm8994 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8994);
	wm8994->dev = &i2c->dev;
	wm8994->irq = i2c->irq;

	if (i2c->dev.of_node) {
		of_id = of_match_device(wm8994_of_match, &i2c->dev);
		if (of_id)
			wm8994->type = (enum wm8994_type)of_id->data;
	} else {
		wm8994->type = id->driver_data;
	}

	wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
	if (IS_ERR(wm8994->regmap)) {
		ret = PTR_ERR(wm8994->regmap);
		dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	return wm8994_device_init(wm8994, i2c->irq);
}

static int wm8994_i2c_remove(struct i2c_client *i2c)
{
	struct wm8994 *wm8994 = i2c_get_clientdata(i2c);

	wm8994_device_exit(wm8994);

	return 0;
}

static const struct i2c_device_id wm8994_i2c_id[] = {
	{ "wm1811", WM1811 },
	{ "wm1811a", WM1811 },
	{ "wm8994", WM8994 },
	{ "wm8958", WM8958 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);

static const struct dev_pm_ops wm8994_pm_ops = {
	SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
};

static struct i2c_driver wm8994_i2c_driver = {
	.driver = {
		.name = "wm8994",
		.pm = &wm8994_pm_ops,
		.of_match_table = of_match_ptr(wm8994_of_match),
	},
	.probe = wm8994_i2c_probe,
	.remove = wm8994_i2c_remove,
	.id_table = wm8994_i2c_id,
};

module_i2c_driver(wm8994_i2c_driver);

MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
Commit	Line	Data
9e501086 MB	1	/*
	2	* wm8994-core.c -- Device access for Wolfson WM8994
	3	*
	4	* Copyright 2009 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
5a0e3ad6	17	#include <linux/slab.h>
9e501086	18	#include <linux/i2c.h>
d6c645fc	19	#include <linux/err.h>
9e501086 MB	20	#include <linux/delay.h>
9e501086 MB	21	#include <linux/mfd/core.h>
20fb2772 MB	22	#include <linux/of.h>
	23	#include <linux/of_device.h>
	24	#include <linux/of_gpio.h>
d450f19e	25	#include <linux/pm_runtime.h>
d6c645fc	26	#include <linux/regmap.h>
9e501086 MB	27	#include <linux/regulator/consumer.h>
	28	#include <linux/regulator/machine.h>
	29
	30	#include <linux/mfd/wm8994/core.h>
	31	#include <linux/mfd/wm8994/pdata.h>
	32	#include <linux/mfd/wm8994/registers.h>
	33
c3f13861	34	#include "wm8994.h"
9e501086	35
ad59de48	36	static const struct mfd_cell wm8994_regulator_devs[] = {
d450f19e MB	37	{
d450f19e MB	38	.name = "wm8994-ldo",
fef22cb4	39	.id = 0,
d450f19e MB	40	.pm_runtime_no_callbacks = true,
	41	},
	42	{
	43	.name = "wm8994-ldo",
fef22cb4	44	.id = 1,
d450f19e MB	45	.pm_runtime_no_callbacks = true,
d450f19e MB	46	},
9e501086 MB	47	};
9e501086 MB	48
c9fbf7e0 MB	49	static struct resource wm8994_codec_resources[] = {
	50	{
	51	.start = WM8994_IRQ_TEMP_SHUT,
	52	.end = WM8994_IRQ_TEMP_WARN,
	53	.flags = IORESOURCE_IRQ,
	54	},
	55	};
	56
	57	static struct resource wm8994_gpio_resources[] = {
	58	{
	59	.start = WM8994_IRQ_GPIO(1),
	60	.end = WM8994_IRQ_GPIO(11),
	61	.flags = IORESOURCE_IRQ,
	62	},
	63	};
	64
ad59de48	65	static const struct mfd_cell wm8994_devs[] = {
c9fbf7e0 MB	66	{
	67	.name = "wm8994-codec",
	68	.num_resources = ARRAY_SIZE(wm8994_codec_resources),
	69	.resources = wm8994_codec_resources,
	70	},
	71
	72	{
	73	.name = "wm8994-gpio",
	74	.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
	75	.resources = wm8994_gpio_resources,
d450f19e	76	.pm_runtime_no_callbacks = true,
c9fbf7e0	77	},
9e501086 MB	78	};
	79
	80	/*
	81	* Supplies for the main bulk of CODEC; the LDO supplies are ignored
	82	* and should be handled via the standard regulator API supply
	83	* management.
	84	*/
b1f43bf3 MB	85	static const char *wm1811_main_supplies[] = {
	86	"DBVDD1",
	87	"DBVDD2",
	88	"DBVDD3",
	89	"DCVDD",
	90	"AVDD1",
	91	"AVDD2",
	92	"CPVDD",
	93	"SPKVDD1",
	94	"SPKVDD2",
	95	};
	96
9e501086 MB	97	static const char *wm8994_main_supplies[] = {
	98	"DBVDD",
	99	"DCVDD",
	100	"AVDD1",
	101	"AVDD2",
	102	"CPVDD",
	103	"SPKVDD1",
	104	"SPKVDD2",
	105	};
	106
559e0df6 MB	107	static const char *wm8958_main_supplies[] = {
	108	"DBVDD1",
	109	"DBVDD2",
	110	"DBVDD3",
	111	"DCVDD",
	112	"AVDD1",
	113	"AVDD2",
	114	"CPVDD",
	115	"SPKVDD1",
	116	"SPKVDD2",
	117	};
	118
48bb9fe4	119	#ifdef CONFIG_PM
d450f19e	120	static int wm8994_suspend(struct device *dev)
9e501086 MB	121	{
	122	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	123	int ret;
	124
77bd70e9	125	/* Don't actually go through with the suspend if the CODEC is
ebe38f80	126	* still active for accessory detect. */
5f40c6b6 MB	127	switch (wm8994->type) {
5f40c6b6 MB	128	case WM8958:
b5488b6e	129	case WM1811:
5f40c6b6 MB	130	ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
	131	if (ret < 0) {
	132	dev_err(dev, "Failed to read power status: %d\n", ret);
	133	} else if (ret & WM8958_MICD_ENA) {
	134	dev_dbg(dev, "CODEC still active, ignoring suspend\n");
	135	return 0;
	136	}
	137	break;
	138	default:
	139	break;
	140	}
	141
881de670 MB	142	/* Disable LDO pulldowns while the device is suspended if we
	143	* don't know that something will be driving them. */
	144	if (!wm8994->ldo_ena_always_driven)
	145	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
	146	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD,
	147	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD);
	148
f40dff9e MB	149	/* Explicitly put the device into reset in case regulators
	150	* don't get disabled in order to ensure consistent restart.
	151	*/
be79cf2f MB	152	wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
be79cf2f MB	153	wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
f40dff9e	154
ed393dcd MB	155	regcache_mark_dirty(wm8994->regmap);
ed393dcd MB	156
78a27cd3 CR	157	/* Restore GPIO registers to prevent problems with mismatched
	158	* pin configurations.
	159	*/
ed393dcd MB	160	ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
ed393dcd MB	161	WM8994_GPIO_11);
78a27cd3 CR	162	if (ret != 0)
	163	dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
	164
1a2017b7 MB	165	/* In case one of the GPIOs is used as a wake input. */
	166	ret = regcache_sync_region(wm8994->regmap,
	167	WM8994_INTERRUPT_STATUS_1_MASK,
	168	WM8994_INTERRUPT_STATUS_1_MASK);
	169	if (ret != 0)
	170	dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
	171
3befc925	172	regcache_cache_only(wm8994->regmap, true);
77bd70e9 MB	173	wm8994->suspended = true;
77bd70e9 MB	174
559e0df6	175	ret = regulator_bulk_disable(wm8994->num_supplies,
9e501086 MB	176	wm8994->supplies);
	177	if (ret != 0) {
	178	dev_err(dev, "Failed to disable supplies: %d\n", ret);
	179	return ret;
	180	}
	181
	182	return 0;
	183	}
	184
d450f19e	185	static int wm8994_resume(struct device *dev)
9e501086 MB	186	{
9e501086 MB	187	struct wm8994 *wm8994 = dev_get_drvdata(dev);
c3f13861	188	int ret;
9e501086	189
77bd70e9 MB	190	/* We may have lied to the PM core about suspending */
	191	if (!wm8994->suspended)
	192	return 0;
	193
559e0df6	194	ret = regulator_bulk_enable(wm8994->num_supplies,
9e501086 MB	195	wm8994->supplies);
	196	if (ret != 0) {
	197	dev_err(dev, "Failed to enable supplies: %d\n", ret);
	198	return ret;
	199	}
	200
3befc925	201	regcache_cache_only(wm8994->regmap, false);
c3f13861 MB	202	ret = regcache_sync(wm8994->regmap);
	203	if (ret != 0) {
	204	dev_err(dev, "Failed to restore register map: %d\n", ret);
	205	goto err_enable;
98ae1cca	206	}
c9fbf7e0	207
881de670 MB	208	/* Disable LDO pulldowns while the device is active */
	209	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
	210	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD,
	211	0);
	212
77bd70e9 MB	213	wm8994->suspended = false;
77bd70e9 MB	214
9e501086	215	return 0;
c3f13861 MB	216
	217	err_enable:
	218	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
	219
	220	return ret;
9e501086 MB	221	}
	222	#endif
	223
	224	#ifdef CONFIG_REGULATOR
	225	static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
	226	{
	227	struct wm8994_ldo_pdata *ldo_pdata;
	228
	229	if (!pdata)
	230	return 0;
	231
	232	ldo_pdata = &pdata->ldo[ldo];
	233
	234	if (!ldo_pdata->init_data)
	235	return 0;
	236
	237	return ldo_pdata->init_data->num_consumer_supplies != 0;
	238	}
	239	#else
	240	static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
	241	{
	242	return 0;
	243	}
	244	#endif
	245
8019ff6c	246	static const struct reg_sequence wm8994_revc_patch[] = {
462835e4 MB	247	{ 0x102, 0x3 },
	248	{ 0x56, 0x3 },
	249	{ 0x817, 0x0 },
	250	{ 0x102, 0x0 },
	251	};
	252
8019ff6c	253	static const struct reg_sequence wm8958_reva_patch[] = {
462835e4 MB	254	{ 0x102, 0x3 },
	255	{ 0xcb, 0x81 },
	256	{ 0x817, 0x0 },
	257	{ 0x102, 0x0 },
	258	};
	259
8019ff6c	260	static const struct reg_sequence wm1811_reva_patch[] = {
462835e4	261	{ 0x102, 0x3 },
9282a7b9	262	{ 0x56, 0xc07 },
462835e4 MB	263	{ 0x5d, 0x7e },
	264	{ 0x5e, 0x0 },
	265	{ 0x102, 0x0 },
	266	};
	267
20fb2772 MB	268	#ifdef CONFIG_OF
	269	static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
	270	{
	271	struct device_node *np = wm8994->dev->of_node;
	272	struct wm8994_pdata *pdata = &wm8994->pdata;
	273	int i;
	274
	275	if (!np)
	276	return 0;
	277
	278	if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
	279	ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
	280	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
	281	if (wm8994->pdata.gpio_defaults[i] == 0)
	282	pdata->gpio_defaults[i]
	283	= WM8994_CONFIGURE_GPIO;
	284	}
	285	}
	286
	287	of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
	288	ARRAY_SIZE(pdata->micbias));
	289
	290	pdata->lineout1_diff = true;
	291	pdata->lineout2_diff = true;
	292	if (of_find_property(np, "wlf,lineout1-se", NULL))
	293	pdata->lineout1_diff = false;
	294	if (of_find_property(np, "wlf,lineout2-se", NULL))
	295	pdata->lineout2_diff = false;
	296
	297	if (of_find_property(np, "wlf,lineout1-feedback", NULL))
	298	pdata->lineout1fb = true;
	299	if (of_find_property(np, "wlf,lineout2-feedback", NULL))
	300	pdata->lineout2fb = true;
	301
	302	if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
	303	pdata->lineout2fb = true;
	304
	305	pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
	306	if (pdata->ldo[0].enable < 0)
	307	pdata->ldo[0].enable = 0;
	308
	309	pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0);
	310	if (pdata->ldo[1].enable < 0)
	311	pdata->ldo[1].enable = 0;
	312
	313	return 0;
	314	}
	315	#else
	316	static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
	317	{
	318	return 0;
	319	}
	320	#endif
	321
9e501086 MB	322	/*
	323	* Instantiate the generic non-control parts of the device.
	324	*/
f791be49	325	static int wm8994_device_init(struct wm8994 *wm8994, int irq)
9e501086	326	{
a8a8fc28	327	struct wm8994_pdata *pdata;
34697898	328	struct regmap_config *regmap_config;
8019ff6c	329	const struct reg_sequence *regmap_patch = NULL;
559e0df6	330	const char *devname;
222bc784	331	int ret, i, patch_regs = 0;
26c34c25	332	int pulls = 0;
9e501086	333
a8a8fc28 MB	334	if (dev_get_platdata(wm8994->dev)) {
	335	pdata = dev_get_platdata(wm8994->dev);
	336	wm8994->pdata = *pdata;
	337	}
	338	pdata = &wm8994->pdata;
	339
20fb2772 MB	340	ret = wm8994_set_pdata_from_of(wm8994);
	341	if (ret != 0)
	342	return ret;
	343
9e501086 MB	344	dev_set_drvdata(wm8994->dev, wm8994);
	345
	346	/* Add the on-chip regulators first for bootstrapping */
fef22cb4	347	ret = mfd_add_devices(wm8994->dev, 0,
9e501086 MB	348	wm8994_regulator_devs,
9e501086 MB	349	ARRAY_SIZE(wm8994_regulator_devs),
55692af5	350	NULL, 0, NULL);
9e501086 MB	351	if (ret != 0) {
9e501086 MB	352	dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
9db4249f	353	goto err;
9e501086 MB	354	}
9e501086 MB	355
559e0df6	356	switch (wm8994->type) {
b1f43bf3 MB	357	case WM1811:
	358	wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
	359	break;
559e0df6 MB	360	case WM8994:
	361	wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
	362	break;
	363	case WM8958:
	364	wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
	365	break;
	366	default:
	367	BUG();
9db4249f	368	goto err;
559e0df6 MB	369	}
559e0df6 MB	370
2fa33494 MB	371	wm8994->supplies = devm_kzalloc(wm8994->dev,
	372	sizeof(struct regulator_bulk_data) *
	373	wm8994->num_supplies, GFP_KERNEL);
fccbd21f AL	374	if (!wm8994->supplies) {
fccbd21f AL	375	ret = -ENOMEM;
9db4249f	376	goto err;
fccbd21f	377	}
9e501086	378
559e0df6	379	switch (wm8994->type) {
b1f43bf3 MB	380	case WM1811:
	381	for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
	382	wm8994->supplies[i].supply = wm1811_main_supplies[i];
	383	break;
559e0df6 MB	384	case WM8994:
	385	for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
	386	wm8994->supplies[i].supply = wm8994_main_supplies[i];
	387	break;
	388	case WM8958:
	389	for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
	390	wm8994->supplies[i].supply = wm8958_main_supplies[i];
	391	break;
	392	default:
	393	BUG();
9db4249f	394	goto err;
559e0df6	395	}
202b5689 VK	396
	397	/*
	398	* Can't use devres helper here as some of the supplies are provided by
	399	* wm8994->dev's children (regulators) and those regulators are
	400	* unregistered by the devres core before the supplies are freed.
	401	*/
	402	ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
9e501086 MB	403	wm8994->supplies);
	404	if (ret != 0) {
	405	dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
9db4249f	406	goto err;
9e501086 MB	407	}
9e501086 MB	408
3e56c468	409	ret = regulator_bulk_enable(wm8994->num_supplies, wm8994->supplies);
9e501086 MB	410	if (ret != 0) {
9e501086 MB	411	dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
202b5689	412	goto err_regulator_free;
9e501086 MB	413	}
	414
	415	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
	416	if (ret < 0) {
	417	dev_err(wm8994->dev, "Failed to read ID register\n");
	418	goto err_enable;
	419	}
559e0df6	420	switch (ret) {
b1f43bf3 MB	421	case 0x1811:
	422	devname = "WM1811";
	423	if (wm8994->type != WM1811)
	424	dev_warn(wm8994->dev, "Device registered as type %d\n",
	425	wm8994->type);
	426	wm8994->type = WM1811;
	427	break;
559e0df6 MB	428	case 0x8994:
	429	devname = "WM8994";
	430	if (wm8994->type != WM8994)
	431	dev_warn(wm8994->dev, "Device registered as type %d\n",
	432	wm8994->type);
	433	wm8994->type = WM8994;
	434	break;
	435	case 0x8958:
	436	devname = "WM8958";
	437	if (wm8994->type != WM8958)
	438	dev_warn(wm8994->dev, "Device registered as type %d\n",
	439	wm8994->type);
	440	wm8994->type = WM8958;
	441	break;
	442	default:
9e501086 MB	443	dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
	444	ret);
	445	ret = -EINVAL;
	446	goto err_enable;
	447	}
	448
	449	ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
	450	if (ret < 0) {
	451	dev_err(wm8994->dev, "Failed to read revision register: %d\n",
	452	ret);
	453	goto err_enable;
	454	}
cc7a7279 MB	455	wm8994->revision = ret & WM8994_CHIP_REV_MASK;
cc7a7279 MB	456	wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
9e501086	457
a2495bc7 MB	458	switch (wm8994->type) {
a2495bc7 MB	459	case WM8994:
7ed5849c	460	switch (wm8994->revision) {
a2495bc7 MB	461	case 0:
a2495bc7 MB	462	case 1:
559e0df6 MB	463	dev_warn(wm8994->dev,
559e0df6 MB	464	"revision %c not fully supported\n",
7ed5849c	465	'A' + wm8994->revision);
a2495bc7	466	break;
462835e4 MB	467	case 2:
462835e4 MB	468	case 3:
d54e17f9	469	default:
462835e4 MB	470	regmap_patch = wm8994_revc_patch;
	471	patch_regs = ARRAY_SIZE(wm8994_revc_patch);
	472	break;
462835e4 MB	473	}
	474	break;
	475
	476	case WM8958:
	477	switch (wm8994->revision) {
	478	case 0:
	479	regmap_patch = wm8958_reva_patch;
	480	patch_regs = ARRAY_SIZE(wm8958_reva_patch);
	481	break;
a2495bc7 MB	482	default:
	483	break;
	484	}
9e501086	485	break;
462835e4	486
443e67ed MB	487	case WM1811:
443e67ed MB	488	/* Revision C did not change the relevant layer */
7ed5849c MB	489	if (wm8994->revision > 1)
7ed5849c MB	490	wm8994->revision++;
d54e17f9 MB	491
	492	regmap_patch = wm1811_reva_patch;
	493	patch_regs = ARRAY_SIZE(wm1811_reva_patch);
443e67ed	494	break;
462835e4	495
9e501086	496	default:
9e501086 MB	497	break;
	498	}
	499
cc7a7279 MB	500	dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
cc7a7279 MB	501	'A' + wm8994->revision, wm8994->cust_id);
9e501086	502
34697898 MB	503	switch (wm8994->type) {
	504	case WM1811:
	505	regmap_config = &wm1811_regmap_config;
	506	break;
	507	case WM8994:
	508	regmap_config = &wm8994_regmap_config;
	509	break;
	510	case WM8958:
	511	regmap_config = &wm8958_regmap_config;
	512	break;
	513	default:
	514	dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
	515	return -EINVAL;
	516	}
	517
	518	ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
	519	if (ret != 0) {
	520	dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
	521	ret);
	522	return ret;
	523	}
9e501086	524
f3799e93 MB	525	/* Explicitly put the device into reset in case regulators
	526	* don't get disabled in order to ensure we know the device
	527	* state.
	528	*/
	529	ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
	530	wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
	531	if (ret != 0) {
	532	dev_err(wm8994->dev, "Failed to reset device: %d\n", ret);
	533	return ret;
	534	}
	535
462835e4 MB	536	if (regmap_patch) {
	537	ret = regmap_register_patch(wm8994->regmap, regmap_patch,
	538	patch_regs);
	539	if (ret != 0) {
	540	dev_err(wm8994->dev, "Failed to register patch: %d\n",
	541	ret);
9db4249f	542	goto err;
462835e4 MB	543	}
	544	}
	545
a8a8fc28 MB	546	wm8994->irq_base = pdata->irq_base;
	547	wm8994->gpio_base = pdata->gpio_base;
	548
	549	/* GPIO configuration is only applied if it's non-zero */
	550	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
	551	if (pdata->gpio_defaults[i]) {
	552	wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
	553	0xffff, pdata->gpio_defaults[i]);
9e501086	554	}
a8a8fc28	555	}
881de670	556
a8a8fc28	557	wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
26c34c25	558
a8a8fc28 MB	559	if (pdata->spkmode_pu)
a8a8fc28 MB	560	pulls \|= WM8994_SPKMODE_PU;
9e501086	561
26c34c25	562	/* Disable unneeded pulls */
881de670	563	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
26c34c25 MB	564	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD \|
	565	WM8994_SPKMODE_PU \| WM8994_CSNADDR_PD,
	566	pulls);
881de670	567
9e501086 MB	568	/* In some system designs where the regulators are not in use,
	569	* we can achieve a small reduction in leakage currents by
	570	* floating LDO outputs. This bit makes no difference if the
	571	* LDOs are enabled, it only affects cases where the LDOs were
	572	* in operation and are then disabled.
	573	*/
	574	for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
	575	if (wm8994_ldo_in_use(pdata, i))
	576	wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
	577	WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
	578	else
	579	wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
	580	WM8994_LDO1_DISCH, 0);
	581	}
	582
c9fbf7e0 MB	583	wm8994_irq_init(wm8994);
c9fbf7e0 MB	584
9e501086 MB	585	ret = mfd_add_devices(wm8994->dev, -1,
9e501086 MB	586	wm8994_devs, ARRAY_SIZE(wm8994_devs),
55692af5	587	NULL, 0, NULL);
9e501086 MB	588	if (ret != 0) {
9e501086 MB	589	dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
c9fbf7e0	590	goto err_irq;
9e501086 MB	591	}
9e501086 MB	592
d450f19e	593	pm_runtime_enable(wm8994->dev);
ee67b0cd	594	pm_runtime_idle(wm8994->dev);
d450f19e	595
9e501086 MB	596	return 0;
9e501086 MB	597
c9fbf7e0 MB	598	err_irq:
c9fbf7e0 MB	599	wm8994_irq_exit(wm8994);
9e501086	600	err_enable:
559e0df6	601	regulator_bulk_disable(wm8994->num_supplies,
9e501086	602	wm8994->supplies);
202b5689 VK	603	err_regulator_free:
202b5689 VK	604	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
9db4249f	605	err:
9e501086	606	mfd_remove_devices(wm8994->dev);
9e501086 MB	607	return ret;
	608	}
	609
4740f73f	610	static void wm8994_device_exit(struct wm8994 *wm8994)
9e501086	611	{
d450f19e	612	pm_runtime_disable(wm8994->dev);
c9fbf7e0	613	wm8994_irq_exit(wm8994);
3e56c468	614	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
202b5689	615	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
bb63f7d3	616	mfd_remove_devices(wm8994->dev);
9e501086 MB	617	}
9e501086 MB	618
cf763c2e	619	static const struct of_device_id wm8994_of_match[] = {
39aa3b5a MB	620	{ .compatible = "wlf,wm1811", .data = (void *)WM1811 },
	621	{ .compatible = "wlf,wm8994", .data = (void *)WM8994 },
	622	{ .compatible = "wlf,wm8958", .data = (void *)WM8958 },
cf763c2e MB	623	{ }
	624	};
	625	MODULE_DEVICE_TABLE(of, wm8994_of_match);
	626
f791be49	627	static int wm8994_i2c_probe(struct i2c_client *i2c,
027d6766	628	const struct i2c_device_id *id)
9e501086	629	{
20fb2772	630	const struct of_device_id *of_id;
9e501086	631	struct wm8994 *wm8994;
d6c645fc	632	int ret;
9e501086	633
2fa33494	634	wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
d0a11693	635	if (wm8994 == NULL)
9e501086	636	return -ENOMEM;
9e501086 MB	637
	638	i2c_set_clientdata(i2c, wm8994);
	639	wm8994->dev = &i2c->dev;
c9fbf7e0	640	wm8994->irq = i2c->irq;
20fb2772 MB	641
	642	if (i2c->dev.of_node) {
	643	of_id = of_match_device(wm8994_of_match, &i2c->dev);
	644	if (of_id)
7f8279ce	645	wm8994->type = (enum wm8994_type)of_id->data;
20fb2772 MB	646	} else {
	647	wm8994->type = id->driver_data;
	648	}
9e501086	649
9db4249f	650	wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
d6c645fc MB	651	if (IS_ERR(wm8994->regmap)) {
	652	ret = PTR_ERR(wm8994->regmap);
	653	dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
	654	ret);
d6c645fc MB	655	return ret;
	656	}
	657
559e0df6	658	return wm8994_device_init(wm8994, i2c->irq);
9e501086 MB	659	}
9e501086 MB	660
4740f73f	661	static int wm8994_i2c_remove(struct i2c_client *i2c)
9e501086 MB	662	{
	663	struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
	664
	665	wm8994_device_exit(wm8994);
	666
	667	return 0;
	668	}
	669
9e501086	670	static const struct i2c_device_id wm8994_i2c_id[] = {
b1f43bf3	671	{ "wm1811", WM1811 },
71d17184	672	{ "wm1811a", WM1811 },
559e0df6 MB	673	{ "wm8994", WM8994 },
559e0df6 MB	674	{ "wm8958", WM8958 },
9e501086 MB	675	{ }
	676	};
	677	MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
	678
6394678e MB	679	static const struct dev_pm_ops wm8994_pm_ops = {
	680	SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
	681	};
d450f19e	682
9e501086 MB	683	static struct i2c_driver wm8994_i2c_driver = {
9e501086 MB	684	.driver = {
d450f19e	685	.name = "wm8994",
d450f19e	686	.pm = &wm8994_pm_ops,
20fb2772	687	.of_match_table = of_match_ptr(wm8994_of_match),
9e501086 MB	688	},
9e501086 MB	689	.probe = wm8994_i2c_probe,
84449216	690	.remove = wm8994_i2c_remove,
9e501086 MB	691	.id_table = wm8994_i2c_id,
	692	};
	693
ceb57d27	694	module_i2c_driver(wm8994_i2c_driver);
9e501086 MB	695
	696	MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
	697	MODULE_LICENSE("GPL");
	698	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");