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5
6#include <linux/interrupt.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/mfd/core.h>
10#include <linux/of_device.h>
11#include <linux/regmap.h>
12#include <linux/spi/spi.h>
13
14#define SPRD_PMIC_INT_MASK_STATUS 0x0
15#define SPRD_PMIC_INT_RAW_STATUS 0x4
16#define SPRD_PMIC_INT_EN 0x8
17
18#define SPRD_SC2731_IRQ_BASE 0x140
19#define SPRD_SC2731_IRQ_NUMS 16
20
21struct sprd_pmic {
22 struct regmap *regmap;
23 struct device *dev;
24 struct regmap_irq *irqs;
25 struct regmap_irq_chip irq_chip;
26 struct regmap_irq_chip_data *irq_data;
27 int irq;
28};
29
30struct sprd_pmic_data {
31 u32 irq_base;
32 u32 num_irqs;
33};
34
35
36
37
38
39
40static const struct sprd_pmic_data sc2731_data = {
41 .irq_base = SPRD_SC2731_IRQ_BASE,
42 .num_irqs = SPRD_SC2731_IRQ_NUMS,
43};
44
45static const struct mfd_cell sprd_pmic_devs[] = {
46 {
47 .name = "sc27xx-wdt",
48 .of_compatible = "sprd,sc2731-wdt",
49 }, {
50 .name = "sc27xx-rtc",
51 .of_compatible = "sprd,sc2731-rtc",
52 }, {
53 .name = "sc27xx-charger",
54 .of_compatible = "sprd,sc2731-charger",
55 }, {
56 .name = "sc27xx-chg-timer",
57 .of_compatible = "sprd,sc2731-chg-timer",
58 }, {
59 .name = "sc27xx-fast-chg",
60 .of_compatible = "sprd,sc2731-fast-chg",
61 }, {
62 .name = "sc27xx-chg-wdt",
63 .of_compatible = "sprd,sc2731-chg-wdt",
64 }, {
65 .name = "sc27xx-typec",
66 .of_compatible = "sprd,sc2731-typec",
67 }, {
68 .name = "sc27xx-flash",
69 .of_compatible = "sprd,sc2731-flash",
70 }, {
71 .name = "sc27xx-eic",
72 .of_compatible = "sprd,sc2731-eic",
73 }, {
74 .name = "sc27xx-efuse",
75 .of_compatible = "sprd,sc2731-efuse",
76 }, {
77 .name = "sc27xx-thermal",
78 .of_compatible = "sprd,sc2731-thermal",
79 }, {
80 .name = "sc27xx-adc",
81 .of_compatible = "sprd,sc2731-adc",
82 }, {
83 .name = "sc27xx-audio-codec",
84 .of_compatible = "sprd,sc2731-audio-codec",
85 }, {
86 .name = "sc27xx-regulator",
87 .of_compatible = "sprd,sc2731-regulator",
88 }, {
89 .name = "sc27xx-vibrator",
90 .of_compatible = "sprd,sc2731-vibrator",
91 }, {
92 .name = "sc27xx-keypad-led",
93 .of_compatible = "sprd,sc2731-keypad-led",
94 }, {
95 .name = "sc27xx-bltc",
96 .of_compatible = "sprd,sc2731-bltc",
97 }, {
98 .name = "sc27xx-fgu",
99 .of_compatible = "sprd,sc2731-fgu",
100 }, {
101 .name = "sc27xx-7sreset",
102 .of_compatible = "sprd,sc2731-7sreset",
103 }, {
104 .name = "sc27xx-poweroff",
105 .of_compatible = "sprd,sc2731-poweroff",
106 }, {
107 .name = "sc27xx-syscon",
108 .of_compatible = "sprd,sc2731-syscon",
109 },
110};
111
112static int sprd_pmic_spi_write(void *context, const void *data, size_t count)
113{
114 struct device *dev = context;
115 struct spi_device *spi = to_spi_device(dev);
116
117 return spi_write(spi, data, count);
118}
119
120static int sprd_pmic_spi_read(void *context,
121 const void *reg, size_t reg_size,
122 void *val, size_t val_size)
123{
124 struct device *dev = context;
125 struct spi_device *spi = to_spi_device(dev);
126 u32 rx_buf[2] = { 0 };
127 int ret;
128
129
130 if (reg_size != sizeof(u32) || val_size != sizeof(u32))
131 return -EINVAL;
132
133
134 memcpy(rx_buf, reg, sizeof(u32));
135 ret = spi_read(spi, rx_buf, 1);
136 if (ret < 0)
137 return ret;
138
139 memcpy(val, rx_buf, val_size);
140 return 0;
141}
142
143static struct regmap_bus sprd_pmic_regmap = {
144 .write = sprd_pmic_spi_write,
145 .read = sprd_pmic_spi_read,
146 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
147 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
148};
149
150static const struct regmap_config sprd_pmic_config = {
151 .reg_bits = 32,
152 .val_bits = 32,
153 .reg_stride = 4,
154 .max_register = 0xffff,
155};
156
157static int sprd_pmic_probe(struct spi_device *spi)
158{
159 struct sprd_pmic *ddata;
160 const struct sprd_pmic_data *pdata;
161 int ret, i;
162
163 pdata = of_device_get_match_data(&spi->dev);
164 if (!pdata) {
165 dev_err(&spi->dev, "No matching driver data found\n");
166 return -EINVAL;
167 }
168
169 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
170 if (!ddata)
171 return -ENOMEM;
172
173 ddata->regmap = devm_regmap_init(&spi->dev, &sprd_pmic_regmap,
174 &spi->dev, &sprd_pmic_config);
175 if (IS_ERR(ddata->regmap)) {
176 ret = PTR_ERR(ddata->regmap);
177 dev_err(&spi->dev, "Failed to allocate register map %d\n", ret);
178 return ret;
179 }
180
181 spi_set_drvdata(spi, ddata);
182 ddata->dev = &spi->dev;
183 ddata->irq = spi->irq;
184
185 ddata->irq_chip.name = dev_name(&spi->dev);
186 ddata->irq_chip.status_base =
187 pdata->irq_base + SPRD_PMIC_INT_MASK_STATUS;
188 ddata->irq_chip.mask_base = pdata->irq_base + SPRD_PMIC_INT_EN;
189 ddata->irq_chip.ack_base = 0;
190 ddata->irq_chip.num_regs = 1;
191 ddata->irq_chip.num_irqs = pdata->num_irqs;
192 ddata->irq_chip.mask_invert = true;
193
194 ddata->irqs = devm_kcalloc(&spi->dev,
195 pdata->num_irqs, sizeof(struct regmap_irq),
196 GFP_KERNEL);
197 if (!ddata->irqs)
198 return -ENOMEM;
199
200 ddata->irq_chip.irqs = ddata->irqs;
201 for (i = 0; i < pdata->num_irqs; i++) {
202 ddata->irqs[i].reg_offset = i / pdata->num_irqs;
203 ddata->irqs[i].mask = BIT(i % pdata->num_irqs);
204 }
205
206 ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
207 IRQF_ONESHOT | IRQF_NO_SUSPEND, 0,
208 &ddata->irq_chip, &ddata->irq_data);
209 if (ret) {
210 dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret);
211 return ret;
212 }
213
214 ret = devm_mfd_add_devices(&spi->dev, PLATFORM_DEVID_AUTO,
215 sprd_pmic_devs, ARRAY_SIZE(sprd_pmic_devs),
216 NULL, 0,
217 regmap_irq_get_domain(ddata->irq_data));
218 if (ret) {
219 dev_err(&spi->dev, "Failed to register device %d\n", ret);
220 return ret;
221 }
222
223 return 0;
224}
225
226static const struct of_device_id sprd_pmic_match[] = {
227 { .compatible = "sprd,sc2731", .data = &sc2731_data },
228 {},
229};
230MODULE_DEVICE_TABLE(of, sprd_pmic_match);
231
232static struct spi_driver sprd_pmic_driver = {
233 .driver = {
234 .name = "sc27xx-pmic",
235 .bus = &spi_bus_type,
236 .of_match_table = sprd_pmic_match,
237 },
238 .probe = sprd_pmic_probe,
239};
240
241static int __init sprd_pmic_init(void)
242{
243 return spi_register_driver(&sprd_pmic_driver);
244}
245subsys_initcall(sprd_pmic_init);
246
247static void __exit sprd_pmic_exit(void)
248{
249 spi_unregister_driver(&sprd_pmic_driver);
250}
251module_exit(sprd_pmic_exit);
252
253MODULE_LICENSE("GPL v2");
254MODULE_DESCRIPTION("Spreadtrum SC27xx PMICs driver");
255MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
256
