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
25static const struct mfd_cell bd9571mwv_cells[] = {
26 { .name = "bd9571mwv-regulator", },
27 { .name = "bd9571mwv-gpio", },
28};
29
30static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
31 regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
32 regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
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
42static 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
47static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
48 regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
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
56static 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
61static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
62 regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
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
68static 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
73static 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
83static 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
102static 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
113static 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
157static 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
199static 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
208static const struct of_device_id bd9571mwv_of_match_table[] = {
209 { .compatible = "rohm,bd9571mwv", },
210 { /* sentinel */ }
211};
212MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);
213
214static const struct i2c_device_id bd9571mwv_id_table[] = {
215 { "bd9571mwv", 0 },
216 { /* sentinel */ }
217};
218MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);
219
220static 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};
229module_i2c_driver(bd9571mwv_driver);
230
231MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
232MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
233MODULE_LICENSE("GPL v2");
234