[linux-block.git] / drivers / mfd / wcd934x.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019, Linaro Limited

#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/wcd934x/registers.h>
#include <linux/mfd/wcd934x/wcd934x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slimbus.h>

#define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask)		\
	[_irq] = {						\
		.reg_offset = (_off),				\
		.mask = (_mask),				\
		.type = {					\
			.type_reg_offset = (_off),		\
			.types_supported = IRQ_TYPE_EDGE_BOTH,	\
			.type_reg_mask  = (_mask),		\
			.type_level_low_val = (_mask),		\
			.type_level_high_val = (_mask),		\
			.type_falling_val = 0,			\
			.type_rising_val = 0,			\
		},						\
	}

static const struct mfd_cell wcd934x_devices[] = {
	{
		.name = "wcd934x-codec",
	}, {
		.name = "wcd934x-gpio",
		.of_compatible = "qcom,wcd9340-gpio",
	}, {
		.name = "wcd934x-soundwire",
		.of_compatible = "qcom,soundwire-v1.3.0",
	},
};

static const struct regmap_irq wcd934x_irqs[] = {
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)),
	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)),
};

static const struct regmap_irq_chip wcd934x_regmap_irq_chip = {
	.name = "wcd934x_irq",
	.status_base = WCD934X_INTR_PIN1_STATUS0,
	.mask_base = WCD934X_INTR_PIN1_MASK0,
	.ack_base = WCD934X_INTR_PIN1_CLEAR0,
	.type_base = WCD934X_INTR_LEVEL0,
	.num_type_reg = 4,
	.type_in_mask = false,
	.num_regs = 4,
	.irqs = wcd934x_irqs,
	.num_irqs = ARRAY_SIZE(wcd934x_irqs),
};

static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3:
	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0:
	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1:
	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2:
	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3:
	case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS:
	case WCD934X_ANA_MBHC_RESULT_3:
	case WCD934X_ANA_MBHC_RESULT_2:
	case WCD934X_ANA_MBHC_RESULT_1:
	case WCD934X_ANA_MBHC_MECH:
	case WCD934X_ANA_MBHC_ELECT:
	case WCD934X_ANA_MBHC_ZDET:
	case WCD934X_ANA_MICB2:
	case WCD934X_ANA_RCO:
	case WCD934X_ANA_BIAS:
		return true;
	default:
		return false;
	}
};

static const struct regmap_range_cfg wcd934x_ranges[] = {
	{	.name = "WCD934X",
		.range_min =  0x0,
		.range_max =  WCD934X_MAX_REGISTER,
		.selector_reg = WCD934X_SEL_REGISTER,
		.selector_mask = WCD934X_SEL_MASK,
		.selector_shift = WCD934X_SEL_SHIFT,
		.window_start = WCD934X_WINDOW_START,
		.window_len = WCD934X_WINDOW_LENGTH,
	},
};

static struct regmap_config wcd934x_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.cache_type = REGCACHE_RBTREE,
	.max_register = 0xffff,
	.can_multi_write = true,
	.ranges = wcd934x_ranges,
	.num_ranges = ARRAY_SIZE(wcd934x_ranges),
	.volatile_reg = wcd934x_is_volatile_register,
};

static int wcd934x_bring_up(struct wcd934x_ddata *ddata)
{
	struct regmap *regmap = ddata->regmap;
	u16 id_minor, id_major;
	int ret;

	ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0,
			       (u8 *)&id_minor, sizeof(u16));
	if (ret)
		return ret;

	ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2,
			       (u8 *)&id_major, sizeof(u16));
	if (ret)
		return ret;

	dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n",
		 id_major, id_minor);

	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01);
	regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19);
	regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15);
	/* Add 1msec delay for VOUT to settle */
	usleep_range(1000, 1100);
	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3);
	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7);
	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);

	return 0;
}

static int wcd934x_slim_status_up(struct slim_device *sdev)
{
	struct device *dev = &sdev->dev;
	struct wcd934x_ddata *ddata;
	int ret;

	ddata = dev_get_drvdata(dev);

	ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config);
	if (IS_ERR(ddata->regmap)) {
		dev_err(dev, "Error allocating slim regmap\n");
		return PTR_ERR(ddata->regmap);
	}

	ret = wcd934x_bring_up(ddata);
	if (ret) {
		dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret);
		return ret;
	}

	ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
				       IRQF_TRIGGER_HIGH, 0,
				       &wcd934x_regmap_irq_chip,
				       &ddata->irq_data);
	if (ret) {
		dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret);
		return ret;
	}

	ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices,
			      ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL);
	if (ret) {
		dev_err(dev, "Failed to add child devices: err = %d\n",
			ret);
		return ret;
	}

	return ret;
}

static int wcd934x_slim_status(struct slim_device *sdev,
			       enum slim_device_status status)
{
	switch (status) {
	case SLIM_DEVICE_STATUS_UP:
		return wcd934x_slim_status_up(sdev);
	case SLIM_DEVICE_STATUS_DOWN:
		mfd_remove_devices(&sdev->dev);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int wcd934x_slim_probe(struct slim_device *sdev)
{
	struct device *dev = &sdev->dev;
	struct device_node *np = dev->of_node;
	struct wcd934x_ddata *ddata;
	struct gpio_desc *reset_gpio;
	int ret;

	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
	if (!ddata)
		return	-ENOMEM;

	ddata->irq = of_irq_get(np, 0);
	if (ddata->irq < 0)
		return dev_err_probe(ddata->dev, ddata->irq,
				     "Failed to get IRQ\n");

	ddata->extclk = devm_clk_get(dev, "extclk");
	if (IS_ERR(ddata->extclk)) {
		dev_err(dev, "Failed to get extclk");
		return PTR_ERR(ddata->extclk);
	}

	ddata->supplies[0].supply = "vdd-buck";
	ddata->supplies[1].supply = "vdd-buck-sido";
	ddata->supplies[2].supply = "vdd-tx";
	ddata->supplies[3].supply = "vdd-rx";
	ddata->supplies[4].supply = "vdd-io";

	ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies);
	if (ret) {
		dev_err(dev, "Failed to get supplies: err = %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies);
	if (ret) {
		dev_err(dev, "Failed to enable supplies: err = %d\n", ret);
		return ret;
	}

	/*
	 * For WCD934X, it takes about 600us for the Vout_A and
	 * Vout_D to be ready after BUCK_SIDO is powered up.
	 * SYS_RST_N shouldn't be pulled high during this time
	 */
	usleep_range(600, 650);
	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(reset_gpio)) {
		return dev_err_probe(dev, PTR_ERR(reset_gpio),
				"Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio));
	}
	msleep(20);
	gpiod_set_value(reset_gpio, 1);
	msleep(20);

	ddata->dev = dev;
	dev_set_drvdata(dev, ddata);

	return 0;
}

static void wcd934x_slim_remove(struct slim_device *sdev)
{
	struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev);

	regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
	mfd_remove_devices(&sdev->dev);
}

static const struct slim_device_id wcd934x_slim_id[] = {
	{ SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340,
	  SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 },
	{}
};

static struct slim_driver wcd934x_slim_driver = {
	.driver = {
		.name = "wcd934x-slim",
	},
	.probe = wcd934x_slim_probe,
	.remove = wcd934x_slim_remove,
	.device_status = wcd934x_slim_status,
	.id_table = wcd934x_slim_id,
};

module_slim_driver(wcd934x_slim_driver);
MODULE_DESCRIPTION("WCD934X slim driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("slim:217:250:*");
MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
Commit	Line	Data
6ac7e4d7 SK	1	// SPDX-License-Identifier: GPL-2.0
	2	// Copyright (c) 2019, Linaro Limited
	3
	4	#include <linux/clk.h>
6a0ee2a6	5	#include <linux/gpio/consumer.h>
6ac7e4d7 SK	6	#include <linux/interrupt.h>
	7	#include <linux/kernel.h>
	8	#include <linux/mfd/core.h>
	9	#include <linux/mfd/wcd934x/registers.h>
	10	#include <linux/mfd/wcd934x/wcd934x.h>
	11	#include <linux/module.h>
6ac7e4d7 SK	12	#include <linux/of.h>
	13	#include <linux/of_irq.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/regmap.h>
	16	#include <linux/regulator/consumer.h>
	17	#include <linux/slimbus.h>
	18
a7618119 SK	19	#define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask) \
	20	[_irq] = { \
	21	.reg_offset = (_off), \
	22	.mask = (_mask), \
	23	.type = { \
	24	.type_reg_offset = (_off), \
	25	.types_supported = IRQ_TYPE_EDGE_BOTH, \
	26	.type_reg_mask = (_mask), \
	27	.type_level_low_val = (_mask), \
	28	.type_level_high_val = (_mask), \
	29	.type_falling_val = 0, \
	30	.type_rising_val = 0, \
	31	}, \
	32	}
	33
6ac7e4d7 SK	34	static const struct mfd_cell wcd934x_devices[] = {
	35	{
	36	.name = "wcd934x-codec",
	37	}, {
	38	.name = "wcd934x-gpio",
	39	.of_compatible = "qcom,wcd9340-gpio",
	40	}, {
	41	.name = "wcd934x-soundwire",
	42	.of_compatible = "qcom,soundwire-v1.3.0",
	43	},
	44	};
	45
	46	static const struct regmap_irq wcd934x_irqs[] = {
a7618119	47	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)),
f62da567 SK	48	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)),
	49	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)),
	50	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)),
	51	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)),
	52	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)),
	53	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)),
	54	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)),
a7618119	55	WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)),
6ac7e4d7 SK	56	};
	57
	58	static const struct regmap_irq_chip wcd934x_regmap_irq_chip = {
	59	.name = "wcd934x_irq",
	60	.status_base = WCD934X_INTR_PIN1_STATUS0,
	61	.mask_base = WCD934X_INTR_PIN1_MASK0,
	62	.ack_base = WCD934X_INTR_PIN1_CLEAR0,
	63	.type_base = WCD934X_INTR_LEVEL0,
	64	.num_type_reg = 4,
	65	.type_in_mask = false,
	66	.num_regs = 4,
	67	.irqs = wcd934x_irqs,
	68	.num_irqs = ARRAY_SIZE(wcd934x_irqs),
	69	};
	70
	71	static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
	72	{
	73	switch (reg) {
	74	case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3:
	75	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0:
	76	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1:
	77	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2:
	78	case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3:
	79	case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS:
	80	case WCD934X_ANA_MBHC_RESULT_3:
	81	case WCD934X_ANA_MBHC_RESULT_2:
	82	case WCD934X_ANA_MBHC_RESULT_1:
	83	case WCD934X_ANA_MBHC_MECH:
	84	case WCD934X_ANA_MBHC_ELECT:
	85	case WCD934X_ANA_MBHC_ZDET:
	86	case WCD934X_ANA_MICB2:
	87	case WCD934X_ANA_RCO:
	88	case WCD934X_ANA_BIAS:
	89	return true;
	90	default:
	91	return false;
	92	}
	93	};
	94
	95	static const struct regmap_range_cfg wcd934x_ranges[] = {
	96	{ .name = "WCD934X",
	97	.range_min = 0x0,
	98	.range_max = WCD934X_MAX_REGISTER,
	99	.selector_reg = WCD934X_SEL_REGISTER,
	100	.selector_mask = WCD934X_SEL_MASK,
	101	.selector_shift = WCD934X_SEL_SHIFT,
	102	.window_start = WCD934X_WINDOW_START,
	103	.window_len = WCD934X_WINDOW_LENGTH,
	104	},
	105	};
	106
	107	static struct regmap_config wcd934x_regmap_config = {
	108	.reg_bits = 16,
	109	.val_bits = 8,
	110	.cache_type = REGCACHE_RBTREE,
	111	.max_register = 0xffff,
	112	.can_multi_write = true,
	113	.ranges = wcd934x_ranges,
	114	.num_ranges = ARRAY_SIZE(wcd934x_ranges),
	115	.volatile_reg = wcd934x_is_volatile_register,
	116	};
	117
	118	static int wcd934x_bring_up(struct wcd934x_ddata *ddata)
	119	{
120	struct regmap *regmap = ddata->regmap;
121	u16 id_minor, id_major;
122	int ret;
123
124	ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0,
125	(u8 *)&id_minor, sizeof(u16));
126	if (ret)
127	return ret;
128
129	ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2,
130	(u8 *)&id_major, sizeof(u16));
131	if (ret)
132	return ret;
133
134	dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n",
135	id_major, id_minor);
136
137	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01);
138	regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19);
139	regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15);
140	/* Add 1msec delay for VOUT to settle */
141	usleep_range(1000, 1100);
142	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5);
143	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7);
144	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3);
145	regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7);
146	regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3);
147
148	return 0;
149	}
150
151	static int wcd934x_slim_status_up(struct slim_device *sdev)
152	{
153	struct device *dev = &sdev->dev;
154	struct wcd934x_ddata *ddata;
155	int ret;
156
157	ddata = dev_get_drvdata(dev);
158
159	ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config);
160	if (IS_ERR(ddata->regmap)) {
161	dev_err(dev, "Error allocating slim regmap\n");
162	return PTR_ERR(ddata->regmap);
163	}
164
165	ret = wcd934x_bring_up(ddata);
166	if (ret) {
167	dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret);
168	return ret;
169	}
170
171	ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq,
172	IRQF_TRIGGER_HIGH, 0,
173	&wcd934x_regmap_irq_chip,
174	&ddata->irq_data);
175	if (ret) {
176	dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret);
177	return ret;
178	}
179
180	ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices,
181	ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL);
182	if (ret) {
183	dev_err(dev, "Failed to add child devices: err = %d\n",
184	ret);
185	return ret;
186	}
187
188	return ret;
189	}
190
191	static int wcd934x_slim_status(struct slim_device *sdev,
192	enum slim_device_status status)
193	{
194	switch (status) {
195	case SLIM_DEVICE_STATUS_UP:
196	return wcd934x_slim_status_up(sdev);
197	case SLIM_DEVICE_STATUS_DOWN:
198	mfd_remove_devices(&sdev->dev);
199	break;
200	default:
201	return -EINVAL;
202	}
203
204	return 0;
205	}
206
207	static int wcd934x_slim_probe(struct slim_device *sdev)
208	{
209	struct device *dev = &sdev->dev;
210	struct device_node *np = dev->of_node;
211	struct wcd934x_ddata *ddata;
6a0ee2a6 MC	212	struct gpio_desc *reset_gpio;
6a0ee2a6 MC	213	int ret;
6ac7e4d7 SK	214
	215	ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
	216	if (!ddata)
	217	return -ENOMEM;
	218
	219	ddata->irq = of_irq_get(np, 0);
0f1b1b89 KK	220	if (ddata->irq < 0)
	221	return dev_err_probe(ddata->dev, ddata->irq,
	222	"Failed to get IRQ\n");
6ac7e4d7	223
6ac7e4d7 SK	224	ddata->extclk = devm_clk_get(dev, "extclk");
	225	if (IS_ERR(ddata->extclk)) {
	226	dev_err(dev, "Failed to get extclk");
	227	return PTR_ERR(ddata->extclk);
	228	}
	229
	230	ddata->supplies[0].supply = "vdd-buck";
	231	ddata->supplies[1].supply = "vdd-buck-sido";
	232	ddata->supplies[2].supply = "vdd-tx";
	233	ddata->supplies[3].supply = "vdd-rx";
	234	ddata->supplies[4].supply = "vdd-io";
	235
	236	ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies);
	237	if (ret) {
	238	dev_err(dev, "Failed to get supplies: err = %d\n", ret);
	239	return ret;
	240	}
	241
	242	ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies);
	243	if (ret) {
	244	dev_err(dev, "Failed to enable supplies: err = %d\n", ret);
	245	return ret;
	246	}
	247
	248	/*
	249	* For WCD934X, it takes about 600us for the Vout_A and
	250	* Vout_D to be ready after BUCK_SIDO is powered up.
	251	* SYS_RST_N shouldn't be pulled high during this time
	252	*/
	253	usleep_range(600, 650);
6a0ee2a6 MC	254	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
	255	if (IS_ERR(reset_gpio)) {
	256	return dev_err_probe(dev, PTR_ERR(reset_gpio),
	257	"Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio));
	258	}
6ac7e4d7	259	msleep(20);
6a0ee2a6	260	gpiod_set_value(reset_gpio, 1);
6ac7e4d7 SK	261	msleep(20);
	262
	263	ddata->dev = dev;
	264	dev_set_drvdata(dev, ddata);
	265
	266	return 0;
	267	}
	268
	269	static void wcd934x_slim_remove(struct slim_device *sdev)
	270	{
	271	struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev);
	272
	273	regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
	274	mfd_remove_devices(&sdev->dev);
6ac7e4d7 SK	275	}
	276
	277	static const struct slim_device_id wcd934x_slim_id[] = {
	278	{ SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340,
	279	SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 },
	280	{}
	281	};
	282
	283	static struct slim_driver wcd934x_slim_driver = {
	284	.driver = {
	285	.name = "wcd934x-slim",
	286	},
	287	.probe = wcd934x_slim_probe,
	288	.remove = wcd934x_slim_remove,
	289	.device_status = wcd934x_slim_status,
	290	.id_table = wcd934x_slim_id,
	291	};
	292
	293	module_slim_driver(wcd934x_slim_driver);
	294	MODULE_DESCRIPTION("WCD934X slim driver");
	295	MODULE_LICENSE("GPL v2");
	296	MODULE_ALIAS("slim:217:250:*");
	297	MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");