[linux-2.6-block.git] / drivers / mfd / bd9571mwv.c

/*
 * ROHM BD9571MWV-M MFD driver
 *
 * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
 *
 * 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.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether expressed or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License version 2 for more details.
 *
 * Based on the TPS65086 driver
 */

#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>

#include <linux/mfd/bd9571mwv.h>

static const struct mfd_cell bd9571mwv_cells[] = {
	{ .name = "bd9571mwv-regulator", },
	{ .name = "bd9571mwv-gpio", },
};

static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
	regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
	regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
	regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)),
	regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID),
	regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT),
	regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC),
	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
};

static const struct regmap_access_table bd9571mwv_readable_table = {
	.yes_ranges	= bd9571mwv_readable_yes_ranges,
	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_readable_yes_ranges),
};

static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
	regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
	regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)),
	regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
	regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
	regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
};

static const struct regmap_access_table bd9571mwv_writable_table = {
	.yes_ranges	= bd9571mwv_writable_yes_ranges,
	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_writable_yes_ranges),
};

static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
	regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
};

static const struct regmap_access_table bd9571mwv_volatile_table = {
	.yes_ranges	= bd9571mwv_volatile_yes_ranges,
	.n_yes_ranges	= ARRAY_SIZE(bd9571mwv_volatile_yes_ranges),
};

static const struct regmap_config bd9571mwv_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.cache_type	= REGCACHE_RBTREE,
	.rd_table	= &bd9571mwv_readable_table,
	.wr_table	= &bd9571mwv_writable_table,
	.volatile_table	= &bd9571mwv_volatile_table,
	.max_register	= 0xff,
};

static const struct regmap_irq bd9571mwv_irqs[] = {
	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0,
		       BD9571MWV_INT_INTREQ_MD1_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0,
		       BD9571MWV_INT_INTREQ_MD2_E1_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0,
		       BD9571MWV_INT_INTREQ_MD2_E2_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0,
		       BD9571MWV_INT_INTREQ_PROT_ERR_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0,
		       BD9571MWV_INT_INTREQ_GP_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0,
		       BD9571MWV_INT_INTREQ_128H_OF_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0,
		       BD9571MWV_INT_INTREQ_WDT_OF_INT),
	REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0,
		       BD9571MWV_INT_INTREQ_BKUP_TRG_INT),
};

static struct regmap_irq_chip bd9571mwv_irq_chip = {
	.name		= "bd9571mwv",
	.status_base	= BD9571MWV_INT_INTREQ,
	.mask_base	= BD9571MWV_INT_INTMASK,
	.ack_base	= BD9571MWV_INT_INTREQ,
	.init_ack_masked = true,
	.num_regs	= 1,
	.irqs		= bd9571mwv_irqs,
	.num_irqs	= ARRAY_SIZE(bd9571mwv_irqs),
};

static int bd9571mwv_identify(struct bd9571mwv *bd)
{
	struct device *dev = bd->dev;
	unsigned int value;
	int ret;

	ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value);
	if (ret) {
		dev_err(dev, "Failed to read vendor code register (ret=%i)\n",
			ret);
		return ret;
	}

	if (value != BD9571MWV_VENDOR_CODE_VAL) {
		dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n",
			value, BD9571MWV_VENDOR_CODE_VAL);
		return -EINVAL;
	}

	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value);
	if (ret) {
		dev_err(dev, "Failed to read product code register (ret=%i)\n",
			ret);
		return ret;
	}

	if (value != BD9571MWV_PRODUCT_CODE_VAL) {
		dev_err(dev, "Invalid product code ID %02x (expected %02x)\n",
			value, BD9571MWV_PRODUCT_CODE_VAL);
		return -EINVAL;
	}

	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value);
	if (ret) {
		dev_err(dev, "Failed to read revision register (ret=%i)\n",
			ret);
		return ret;
	}

	dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff);

	return 0;
}

static int bd9571mwv_probe(struct i2c_client *client,
			  const struct i2c_device_id *ids)
{
	struct bd9571mwv *bd;
	int ret;

	bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
	if (!bd)
		return -ENOMEM;

	i2c_set_clientdata(client, bd);
	bd->dev = &client->dev;
	bd->irq = client->irq;

	bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config);
	if (IS_ERR(bd->regmap)) {
		dev_err(bd->dev, "Failed to initialize register map\n");
		return PTR_ERR(bd->regmap);
	}

	ret = bd9571mwv_identify(bd);
	if (ret)
		return ret;

	ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0,
				  &bd9571mwv_irq_chip, &bd->irq_data);
	if (ret) {
		dev_err(bd->dev, "Failed to register IRQ chip\n");
		return ret;
	}

	ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells,
			      ARRAY_SIZE(bd9571mwv_cells), NULL, 0,
			      regmap_irq_get_domain(bd->irq_data));
	if (ret) {
		regmap_del_irq_chip(bd->irq, bd->irq_data);
		return ret;
	}

	return 0;
}

static int bd9571mwv_remove(struct i2c_client *client)
{
	struct bd9571mwv *bd = i2c_get_clientdata(client);

	regmap_del_irq_chip(bd->irq, bd->irq_data);

	return 0;
}

static const struct of_device_id bd9571mwv_of_match_table[] = {
	{ .compatible = "rohm,bd9571mwv", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);

static const struct i2c_device_id bd9571mwv_id_table[] = {
	{ "bd9571mwv", 0 },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);

static struct i2c_driver bd9571mwv_driver = {
	.driver		= {
		.name	= "bd9571mwv",
		.of_match_table = bd9571mwv_of_match_table,
	},
	.probe		= bd9571mwv_probe,
	.remove		= bd9571mwv_remove,
	.id_table       = bd9571mwv_id_table,
};
module_i2c_driver(bd9571mwv_driver);

MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d3ea2127 MV	1	/*
	2	* ROHM BD9571MWV-M MFD driver
	3	*
	4	* Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	11	* kind, whether expressed or implied; without even the implied warranty
	12	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License version 2 for more details.
	14	*
	15	* Based on the TPS65086 driver
	16	*/
	17
	18	#include <linux/i2c.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/mfd/core.h>
	21	#include <linux/module.h>
	22
	23	#include <linux/mfd/bd9571mwv.h>
	24
	25	static const struct mfd_cell bd9571mwv_cells[] = {
	26	{ .name = "bd9571mwv-regulator", },
	27	{ .name = "bd9571mwv-gpio", },
	28	};
	29
	30	static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
	31	regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
7b569bcb	32	regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
d3ea2127 MV	33	regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)),
	34	regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID),
	35	regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT),
	36	regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC),
	37	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
	38	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
	39	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
	40	};
	41
	42	static const struct regmap_access_table bd9571mwv_readable_table = {
	43	.yes_ranges = bd9571mwv_readable_yes_ranges,
	44	.n_yes_ranges = ARRAY_SIZE(bd9571mwv_readable_yes_ranges),
	45	};
	46
	47	static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
7b569bcb	48	regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
d3ea2127 MV	49	regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)),
	50	regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
	51	regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
	52	regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
	53	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
	54	};
	55
	56	static const struct regmap_access_table bd9571mwv_writable_table = {
	57	.yes_ranges = bd9571mwv_writable_yes_ranges,
	58	.n_yes_ranges = ARRAY_SIZE(bd9571mwv_writable_yes_ranges),
	59	};
	60
	61	static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
b0aff01e	62	regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
d3ea2127 MV	63	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
	64	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
	65	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
	66	};
	67
	68	static const struct regmap_access_table bd9571mwv_volatile_table = {
	69	.yes_ranges = bd9571mwv_volatile_yes_ranges,
	70	.n_yes_ranges = ARRAY_SIZE(bd9571mwv_volatile_yes_ranges),
	71	};
	72
	73	static const struct regmap_config bd9571mwv_regmap_config = {
	74	.reg_bits = 8,
	75	.val_bits = 8,
	76	.cache_type = REGCACHE_RBTREE,
	77	.rd_table = &bd9571mwv_readable_table,
	78	.wr_table = &bd9571mwv_writable_table,
	79	.volatile_table = &bd9571mwv_volatile_table,
	80	.max_register = 0xff,
	81	};
	82
	83	static const struct regmap_irq bd9571mwv_irqs[] = {
	84	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0,
	85	BD9571MWV_INT_INTREQ_MD1_INT),
	86	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0,
	87	BD9571MWV_INT_INTREQ_MD2_E1_INT),
	88	REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0,
	89	BD9571MWV_INT_INTREQ_MD2_E2_INT),
	90	REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0,
	91	BD9571MWV_INT_INTREQ_PROT_ERR_INT),
	92	REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0,
	93	BD9571MWV_INT_INTREQ_GP_INT),
	94	REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0,
	95	BD9571MWV_INT_INTREQ_128H_OF_INT),
	96	REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0,
	97	BD9571MWV_INT_INTREQ_WDT_OF_INT),
	98	REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0,
	99	BD9571MWV_INT_INTREQ_BKUP_TRG_INT),
	100	};
	101
	102	static struct regmap_irq_chip bd9571mwv_irq_chip = {
	103	.name = "bd9571mwv",
	104	.status_base = BD9571MWV_INT_INTREQ,
	105	.mask_base = BD9571MWV_INT_INTMASK,
	106	.ack_base = BD9571MWV_INT_INTREQ,
	107	.init_ack_masked = true,
	108	.num_regs = 1,
	109	.irqs = bd9571mwv_irqs,
	110	.num_irqs = ARRAY_SIZE(bd9571mwv_irqs),
	111	};
	112
	113	static int bd9571mwv_identify(struct bd9571mwv *bd)
	114	{
	115	struct device *dev = bd->dev;
	116	unsigned int value;
	117	int ret;
	118
	119	ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value);
	120	if (ret) {
	121	dev_err(dev, "Failed to read vendor code register (ret=%i)\n",
	122	ret);
	123	return ret;
	124	}
	125
	126	if (value != BD9571MWV_VENDOR_CODE_VAL) {
127	dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n",
128	value, BD9571MWV_VENDOR_CODE_VAL);
129	return -EINVAL;
130	}
131
132	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value);
133	if (ret) {
134	dev_err(dev, "Failed to read product code register (ret=%i)\n",
135	ret);
136	return ret;
137	}
138
139	if (value != BD9571MWV_PRODUCT_CODE_VAL) {
140	dev_err(dev, "Invalid product code ID %02x (expected %02x)\n",
141	value, BD9571MWV_PRODUCT_CODE_VAL);
142	return -EINVAL;
143	}
144
145	ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value);
146	if (ret) {
147	dev_err(dev, "Failed to read revision register (ret=%i)\n",
148	ret);
149	return ret;
150	}
151
152	dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff);
153
154	return 0;
155	}
156
157	static int bd9571mwv_probe(struct i2c_client *client,
158	const struct i2c_device_id *ids)
159	{
160	struct bd9571mwv *bd;
161	int ret;
162
163	bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
164	if (!bd)
165	return -ENOMEM;
166
167	i2c_set_clientdata(client, bd);
168	bd->dev = &client->dev;
169	bd->irq = client->irq;
170
171	bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config);
172	if (IS_ERR(bd->regmap)) {
173	dev_err(bd->dev, "Failed to initialize register map\n");
174	return PTR_ERR(bd->regmap);
175	}
176
177	ret = bd9571mwv_identify(bd);
178	if (ret)
179	return ret;
180
181	ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0,
182	&bd9571mwv_irq_chip, &bd->irq_data);
183	if (ret) {
184	dev_err(bd->dev, "Failed to register IRQ chip\n");
185	return ret;
186	}
187
188	ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells,
189	ARRAY_SIZE(bd9571mwv_cells), NULL, 0,
190	regmap_irq_get_domain(bd->irq_data));
191	if (ret) {
192	regmap_del_irq_chip(bd->irq, bd->irq_data);
193	return ret;
194	}
195
196	return 0;
197	}
198
199	static int bd9571mwv_remove(struct i2c_client *client)
200	{
201	struct bd9571mwv *bd = i2c_get_clientdata(client);
202
203	regmap_del_irq_chip(bd->irq, bd->irq_data);
204
205	return 0;
206	}
207
208	static const struct of_device_id bd9571mwv_of_match_table[] = {
209	{ .compatible = "rohm,bd9571mwv", },
210	{ /* sentinel */ }
211	};
212	MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);
213
214	static const struct i2c_device_id bd9571mwv_id_table[] = {
215	{ "bd9571mwv", 0 },
216	{ /* sentinel */ }
217	};
218	MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);
219
220	static struct i2c_driver bd9571mwv_driver = {
221	.driver = {
222	.name = "bd9571mwv",
223	.of_match_table = bd9571mwv_of_match_table,
224	},
225	.probe = bd9571mwv_probe,
226	.remove = bd9571mwv_remove,
227	.id_table = bd9571mwv_id_table,
228	};
229	module_i2c_driver(bd9571mwv_driver);
230
231	MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
232	MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
233	MODULE_LICENSE("GPL v2");