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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 bd718xx_mfd_cells[] = {
34 {
35 .name = "gpio-keys",
36 .platform_data = &bd718xx_powerkey_data,
37 .pdata_size = sizeof(bd718xx_powerkey_data),
38 },
39 { .name = "bd718xx-clk", },
40 { .name = "bd718xx-pmic", },
41};
42
43static const struct regmap_irq bd718xx_irqs[] = {
44 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
45 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
46 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
47 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
48 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
49 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
50 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
51};
52
53static struct regmap_irq_chip bd718xx_irq_chip = {
54 .name = "bd718xx-irq",
55 .irqs = bd718xx_irqs,
56 .num_irqs = ARRAY_SIZE(bd718xx_irqs),
57 .num_regs = 1,
58 .irq_reg_stride = 1,
59 .status_base = BD718XX_REG_IRQ,
60 .mask_base = BD718XX_REG_MIRQ,
61 .ack_base = BD718XX_REG_IRQ,
62 .init_ack_masked = true,
63 .mask_invert = false,
64};
65
66static const struct regmap_range pmic_status_range = {
67 .range_min = BD718XX_REG_IRQ,
68 .range_max = BD718XX_REG_POW_STATE,
69};
70
71static const struct regmap_access_table volatile_regs = {
72 .yes_ranges = &pmic_status_range,
73 .n_yes_ranges = 1,
74};
75
76static const struct regmap_config bd718xx_regmap_config = {
77 .reg_bits = 8,
78 .val_bits = 8,
79 .volatile_table = &volatile_regs,
80 .max_register = BD718XX_MAX_REGISTER - 1,
81 .cache_type = REGCACHE_RBTREE,
82};
83
84static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
85{
86 struct device* dev = bd718xx->chip.dev;
87 u32 short_press_ms, long_press_ms;
88 u32 short_press_value, long_press_value;
89 int ret;
90
91 ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
92 &short_press_ms);
93 if (!ret) {
94 short_press_value = min(15u, (short_press_ms + 250) / 500);
95 ret = regmap_update_bits(bd718xx->chip.regmap,
96 BD718XX_REG_PWRONCONFIG0,
97 BD718XX_PWRBTN_PRESS_DURATION_MASK,
98 short_press_value);
99 if (ret) {
100 dev_err(dev, "Failed to init pwron short press\n");
101 return ret;
102 }
103 }
104
105 ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
106 &long_press_ms);
107 if (!ret) {
108 long_press_value = min(15u, (long_press_ms + 500) / 1000);
109 ret = regmap_update_bits(bd718xx->chip.regmap,
110 BD718XX_REG_PWRONCONFIG1,
111 BD718XX_PWRBTN_PRESS_DURATION_MASK,
112 long_press_value);
113 if (ret) {
114 dev_err(dev, "Failed to init pwron long press\n");
115 return ret;
116 }
117 }
118
119 return 0;
120}
121
122static int bd718xx_i2c_probe(struct i2c_client *i2c,
123 const struct i2c_device_id *id)
124{
125 struct bd718xx *bd718xx;
126 int ret;
127
128 if (!i2c->irq) {
129 dev_err(&i2c->dev, "No IRQ configured\n");
130 return -EINVAL;
131 }
132
133 bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
134
135 if (!bd718xx)
136 return -ENOMEM;
137
138 bd718xx->chip_irq = i2c->irq;
139 bd718xx->chip.chip_type = (unsigned int)(uintptr_t)
140 of_device_get_match_data(&i2c->dev);
141 bd718xx->chip.dev = &i2c->dev;
142 dev_set_drvdata(&i2c->dev, bd718xx);
143
144 bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
145 &bd718xx_regmap_config);
146 if (IS_ERR(bd718xx->chip.regmap)) {
147 dev_err(&i2c->dev, "regmap initialization failed\n");
148 return PTR_ERR(bd718xx->chip.regmap);
149 }
150
151 ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
152 bd718xx->chip_irq, IRQF_ONESHOT, 0,
153 &bd718xx_irq_chip, &bd718xx->irq_data);
154 if (ret) {
155 dev_err(&i2c->dev, "Failed to add irq_chip\n");
156 return ret;
157 }
158
159 ret = bd718xx_init_press_duration(bd718xx);
160 if (ret)
161 return ret;
162
163 ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
164
165 if (ret < 0) {
166 dev_err(&i2c->dev, "Failed to get the IRQ\n");
167 return ret;
168 }
169
170 button.irq = ret;
171
172 ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
173 bd718xx_mfd_cells,
174 ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
175 regmap_irq_get_domain(bd718xx->irq_data));
176 if (ret)
177 dev_err(&i2c->dev, "Failed to create subdevices\n");
178
179 return ret;
180}
181
182static const struct of_device_id bd718xx_of_match[] = {
183 {
184 .compatible = "rohm,bd71837",
185 .data = (void *)ROHM_CHIP_TYPE_BD71837,
186 },
187 {
188 .compatible = "rohm,bd71847",
189 .data = (void *)ROHM_CHIP_TYPE_BD71847,
190 },
191 { }
192};
193MODULE_DEVICE_TABLE(of, bd718xx_of_match);
194
195static struct i2c_driver bd718xx_i2c_driver = {
196 .driver = {
197 .name = "rohm-bd718x7",
198 .of_match_table = bd718xx_of_match,
199 },
200 .probe = bd718xx_i2c_probe,
201};
202
203static int __init bd718xx_i2c_init(void)
204{
205 return i2c_add_driver(&bd718xx_i2c_driver);
206}
207
208
209subsys_initcall(bd718xx_i2c_init);
210
211static void __exit bd718xx_i2c_exit(void)
212{
213 i2c_del_driver(&bd718xx_i2c_driver);
214}
215module_exit(bd718xx_i2c_exit);
216
217MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
218MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
219MODULE_LICENSE("GPL");
220
