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10#include <linux/gpio_keys.h>
11#include <linux/i2c.h>
12#include <linux/input.h>
13#include <linux/interrupt.h>
14#include <linux/mfd/rohm-bd718x7.h>
15#include <linux/mfd/core.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/regmap.h>
19#include <linux/types.h>
20
21static struct gpio_keys_button button = {
22 .code = KEY_POWER,
23 .gpio = -1,
24 .type = EV_KEY,
25};
26
27static struct gpio_keys_platform_data bd718xx_powerkey_data = {
28 .buttons = &button,
29 .nbuttons = 1,
30 .name = "bd718xx-pwrkey",
31};
32
33static struct mfd_cell bd71837_mfd_cells[] = {
34 {
35 .name = "gpio-keys",
36 .platform_data = &bd718xx_powerkey_data,
37 .pdata_size = sizeof(bd718xx_powerkey_data),
38 },
39 { .name = "bd71837-clk", },
40 { .name = "bd71837-pmic", },
41};
42
43static struct mfd_cell bd71847_mfd_cells[] = {
44 {
45 .name = "gpio-keys",
46 .platform_data = &bd718xx_powerkey_data,
47 .pdata_size = sizeof(bd718xx_powerkey_data),
48 },
49 { .name = "bd71847-clk", },
50 { .name = "bd71847-pmic", },
51};
52
53static const struct regmap_irq bd718xx_irqs[] = {
54 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
55 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
56 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
57 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
58 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
59 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
60 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
61};
62
63static struct regmap_irq_chip bd718xx_irq_chip = {
64 .name = "bd718xx-irq",
65 .irqs = bd718xx_irqs,
66 .num_irqs = ARRAY_SIZE(bd718xx_irqs),
67 .num_regs = 1,
68 .irq_reg_stride = 1,
69 .status_base = BD718XX_REG_IRQ,
70 .mask_base = BD718XX_REG_MIRQ,
71 .ack_base = BD718XX_REG_IRQ,
72 .init_ack_masked = true,
73 .mask_invert = false,
74};
75
76static const struct regmap_range pmic_status_range = {
77 .range_min = BD718XX_REG_IRQ,
78 .range_max = BD718XX_REG_POW_STATE,
79};
80
81static const struct regmap_access_table volatile_regs = {
82 .yes_ranges = &pmic_status_range,
83 .n_yes_ranges = 1,
84};
85
86static const struct regmap_config bd718xx_regmap_config = {
87 .reg_bits = 8,
88 .val_bits = 8,
89 .volatile_table = &volatile_regs,
90 .max_register = BD718XX_MAX_REGISTER - 1,
91 .cache_type = REGCACHE_RBTREE,
92};
93
94static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
95{
96 struct device* dev = bd718xx->chip.dev;
97 u32 short_press_ms, long_press_ms;
98 u32 short_press_value, long_press_value;
99 int ret;
100
101 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
102 &short_press_ms);
103 if (!ret) {
104 short_press_value = min(15u, (short_press_ms + 250) / 500);
105 ret = regmap_update_bits(bd718xx->chip.regmap,
106 BD718XX_REG_PWRONCONFIG0,
107 BD718XX_PWRBTN_PRESS_DURATION_MASK,
108 short_press_value);
109 if (ret) {
110 dev_err(dev, "Failed to init pwron short press\n");
111 return ret;
112 }
113 }
114
115 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
116 &long_press_ms);
117 if (!ret) {
118 long_press_value = min(15u, (long_press_ms + 500) / 1000);
119 ret = regmap_update_bits(bd718xx->chip.regmap,
120 BD718XX_REG_PWRONCONFIG1,
121 BD718XX_PWRBTN_PRESS_DURATION_MASK,
122 long_press_value);
123 if (ret) {
124 dev_err(dev, "Failed to init pwron long press\n");
125 return ret;
126 }
127 }
128
129 return 0;
130}
131
132static int bd718xx_i2c_probe(struct i2c_client *i2c,
133 const struct i2c_device_id *id)
134{
135 struct bd718xx *bd718xx;
136 int ret;
137 unsigned int chip_type;
138 struct mfd_cell *mfd;
139 int cells;
140
141 if (!i2c->irq) {
142 dev_err(&i2c->dev, "No IRQ configured\n");
143 return -EINVAL;
144 }
145
146 bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
147
148 if (!bd718xx)
149 return -ENOMEM;
150
151 bd718xx->chip_irq = i2c->irq;
152 chip_type = (unsigned int)(uintptr_t)
153 of_device_get_match_data(&i2c->dev);
154 switch (chip_type) {
155 case ROHM_CHIP_TYPE_BD71837:
156 mfd = bd71837_mfd_cells;
157 cells = ARRAY_SIZE(bd71837_mfd_cells);
158 break;
159 case ROHM_CHIP_TYPE_BD71847:
160 mfd = bd71847_mfd_cells;
161 cells = ARRAY_SIZE(bd71847_mfd_cells);
162 break;
163 default:
164 dev_err(&i2c->dev, "Unknown device type");
165 return -EINVAL;
166 }
167 bd718xx->chip.dev = &i2c->dev;
168 dev_set_drvdata(&i2c->dev, bd718xx);
169
170 bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
171 &bd718xx_regmap_config);
172 if (IS_ERR(bd718xx->chip.regmap)) {
173 dev_err(&i2c->dev, "regmap initialization failed\n");
174 return PTR_ERR(bd718xx->chip.regmap);
175 }
176
177 ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
178 bd718xx->chip_irq, IRQF_ONESHOT, 0,
179 &bd718xx_irq_chip, &bd718xx->irq_data);
180 if (ret) {
181 dev_err(&i2c->dev, "Failed to add irq_chip\n");
182 return ret;
183 }
184
185 ret = bd718xx_init_press_duration(bd718xx);
186 if (ret)
187 return ret;
188
189 ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
190
191 if (ret < 0) {
192 dev_err(&i2c->dev, "Failed to get the IRQ\n");
193 return ret;
194 }
195
196 button.irq = ret;
197
198 ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
199 mfd, cells, NULL, 0,
200 regmap_irq_get_domain(bd718xx->irq_data));
201 if (ret)
202 dev_err(&i2c->dev, "Failed to create subdevices\n");
203
204 return ret;
205}
206
207static const struct of_device_id bd718xx_of_match[] = {
208 {
209 .compatible = "rohm,bd71837",
210 .data = (void *)ROHM_CHIP_TYPE_BD71837,
211 },
212 {
213 .compatible = "rohm,bd71847",
214 .data = (void *)ROHM_CHIP_TYPE_BD71847,
215 },
216 {
217 .compatible = "rohm,bd71850",
218 .data = (void *)ROHM_CHIP_TYPE_BD71847,
219 },
220 { }
221};
222MODULE_DEVICE_TABLE(of, bd718xx_of_match);
223
224static struct i2c_driver bd718xx_i2c_driver = {
225 .driver = {
226 .name = "rohm-bd718x7",
227 .of_match_table = bd718xx_of_match,
228 },
229 .probe = bd718xx_i2c_probe,
230};
231
232static int __init bd718xx_i2c_init(void)
233{
234 return i2c_add_driver(&bd718xx_i2c_driver);
235}
236
237
238subsys_initcall(bd718xx_i2c_init);
239
240static void __exit bd718xx_i2c_exit(void)
241{
242 i2c_del_driver(&bd718xx_i2c_driver);
243}
244module_exit(bd718xx_i2c_exit);
245
246MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
247MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
248MODULE_LICENSE("GPL");
249
