1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2022 Richtek Technology Corp.
4 *
5 * Author: ChiYuan Huang <cy_huang@richtek.com>
6 */
7
8 #include <linux/bits.h>
9 #include <linux/bitfield.h>
10 #include <linux/i2c.h>
11 #include <linux/interrupt.h>
12 #include <linux/kernel.h>
13 #include <linux/mfd/core.h>
14 #include <linux/module.h>
15 #include <linux/regmap.h>
16
17 #include "mt6370.h"
18
19 #define MT6370_REG_DEV_INFO 0x100
20 #define MT6370_REG_CHG_IRQ1 0x1C0
21 #define MT6370_REG_CHG_MASK1 0x1E0
22 #define MT6370_REG_MAXADDR 0x1FF
23
24 #define MT6370_VENID_MASK GENMASK(7, 4)
25
26 #define MT6370_NUM_IRQREGS 16
27 #define MT6370_USBC_I2CADDR 0x4E
28 #define MT6370_MAX_ADDRLEN 2
29
30 #define MT6370_VENID_RT5081 0x8
31 #define MT6370_VENID_RT5081A 0xA
32 #define MT6370_VENID_MT6370 0xE
33 #define MT6370_VENID_MT6371 0xF
34 #define MT6370_VENID_MT6372P 0x9
35 #define MT6370_VENID_MT6372CP 0xB
36
37 static const struct regmap_irq mt6370_irqs[] = {
38 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHGON, 8),
39 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TREG, 8),
40 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_AICR, 8),
41 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_MIVR, 8),
42 REGMAP_IRQ_REG_LINE(MT6370_IRQ_PWR_RDY, 8),
43 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FL_CHG_VINOVP, 8),
44 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSUV, 8),
45 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VSYSOV, 8),
46 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VBATOV, 8),
47 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_VINOVPCHG, 8),
48 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COLD, 8),
49 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_COOL, 8),
50 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_WARM, 8),
51 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_BAT_HOT, 8),
52 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TS_STATC, 8),
53 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_FAULT, 8),
54 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_STATC, 8),
55 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TMR, 8),
56 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_BATABS, 8),
57 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ADPBAD, 8),
58 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RVP, 8),
59 REGMAP_IRQ_REG_LINE(MT6370_IRQ_TSHUTDOWN, 8),
60 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IINMEAS, 8),
61 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_ICCMEAS, 8),
62 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET_DONE, 8),
63 REGMAP_IRQ_REG_LINE(MT6370_IRQ_WDTMR, 8),
64 REGMAP_IRQ_REG_LINE(MT6370_IRQ_SSFINISH, 8),
65 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_RECHG, 8),
66 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_TERM, 8),
67 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHG_IEOC, 8),
68 REGMAP_IRQ_REG_LINE(MT6370_IRQ_ADC_DONE, 8),
69 REGMAP_IRQ_REG_LINE(MT6370_IRQ_PUMPX_DONE, 8),
70 REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_BATUV, 8),
71 REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_MIDOV, 8),
72 REGMAP_IRQ_REG_LINE(MT6370_IRQ_BST_OLP, 8),
73 REGMAP_IRQ_REG_LINE(MT6370_IRQ_ATTACH, 8),
74 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DETACH, 8),
75 REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_STPDONE, 8),
76 REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_VBUSDET_DONE, 8),
77 REGMAP_IRQ_REG_LINE(MT6370_IRQ_HVDCP_DET, 8),
78 REGMAP_IRQ_REG_LINE(MT6370_IRQ_CHGDET, 8),
79 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DCDT, 8),
80 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_VGOK, 8),
81 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_WDTMR, 8),
82 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_UC, 8),
83 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OC, 8),
84 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DIRCHG_OV, 8),
85 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_SWON, 8),
86 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP_D, 8),
87 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_UVP, 8),
88 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP_D, 8),
89 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OVPCTRL_OVP, 8),
90 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_STRBPIN, 8),
91 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TORPIN, 8),
92 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_TX, 8),
93 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED_LVF, 8),
94 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_SHORT, 8),
95 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_SHORT, 8),
96 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_STRB, 8),
97 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB, 8),
98 REGMAP_IRQ_REG_LINE(mT6370_IRQ_FLED2_STRB_TO, 8),
99 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_STRB_TO, 8),
100 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED2_TOR, 8),
101 REGMAP_IRQ_REG_LINE(MT6370_IRQ_FLED1_TOR, 8),
102 REGMAP_IRQ_REG_LINE(MT6370_IRQ_OTP, 8),
103 REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_OVP, 8),
104 REGMAP_IRQ_REG_LINE(MT6370_IRQ_VDDA_UV, 8),
105 REGMAP_IRQ_REG_LINE(MT6370_IRQ_LDO_OC, 8),
106 REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OCP, 8),
107 REGMAP_IRQ_REG_LINE(MT6370_IRQ_BLED_OVP, 8),
108 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_OCP, 8),
109 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_OCP, 8),
110 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_BST_OCP, 8),
111 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VNEG_SCP, 8),
112 REGMAP_IRQ_REG_LINE(MT6370_IRQ_DSV_VPOS_SCP, 8),
113 };
114
115 static const struct regmap_irq_chip mt6370_irq_chip = {
116 .name = "mt6370-irqs",
117 .status_base = MT6370_REG_CHG_IRQ1,
118 .mask_base = MT6370_REG_CHG_MASK1,
119 .num_regs = MT6370_NUM_IRQREGS,
120 .irqs = mt6370_irqs,
121 .num_irqs = ARRAY_SIZE(mt6370_irqs),
122 };
123
124 static const struct resource mt6370_regulator_irqs[] = {
125 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_SCP, "db_vpos_scp"),
126 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_SCP, "db_vneg_scp"),
127 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_BST_OCP, "db_vbst_ocp"),
128 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VPOS_OCP, "db_vpos_ocp"),
129 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_DSV_VNEG_OCP, "db_vneg_ocp"),
130 DEFINE_RES_IRQ_NAMED(MT6370_IRQ_LDO_OC, "ldo_oc"),
131 };
132
133 static const struct mfd_cell mt6370_devices[] = {
134 MFD_CELL_OF("mt6370-adc",
135 NULL, NULL, 0, 0, "mediatek,mt6370-adc"),
136 MFD_CELL_OF("mt6370-charger",
137 NULL, NULL, 0, 0, "mediatek,mt6370-charger"),
138 MFD_CELL_OF("mt6370-flashlight",
139 NULL, NULL, 0, 0, "mediatek,mt6370-flashlight"),
140 MFD_CELL_OF("mt6370-indicator",
141 NULL, NULL, 0, 0, "mediatek,mt6370-indicator"),
142 MFD_CELL_OF("mt6370-tcpc",
143 NULL, NULL, 0, 0, "mediatek,mt6370-tcpc"),
144 MFD_CELL_RES("mt6370-regulator", mt6370_regulator_irqs),
145 };
146
147 static const struct mfd_cell mt6370_exclusive_devices[] = {
148 MFD_CELL_OF("mt6370-backlight",
149 NULL, NULL, 0, 0, "mediatek,mt6370-backlight"),
150 };
151
152 static const struct mfd_cell mt6372_exclusive_devices[] = {
153 MFD_CELL_OF("mt6370-backlight",
154 NULL, NULL, 0, 0, "mediatek,mt6372-backlight"),
155 };
156
mt6370_check_vendor_info(struct device * dev,struct regmap * rmap,int * vid)157 static int mt6370_check_vendor_info(struct device *dev, struct regmap *rmap,
158 int *vid)
159 {
160 unsigned int devinfo;
161 int ret;
162
163 ret = regmap_read(rmap, MT6370_REG_DEV_INFO, &devinfo);
164 if (ret)
165 return ret;
166
167 *vid = FIELD_GET(MT6370_VENID_MASK, devinfo);
168 switch (*vid) {
169 case MT6370_VENID_RT5081:
170 case MT6370_VENID_RT5081A:
171 case MT6370_VENID_MT6370:
172 case MT6370_VENID_MT6371:
173 case MT6370_VENID_MT6372P:
174 case MT6370_VENID_MT6372CP:
175 return 0;
176 default:
177 dev_err(dev, "Unknown Vendor ID 0x%02x\n", devinfo);
178 return -ENODEV;
179 }
180 }
181
mt6370_regmap_read(void * context,const void * reg_buf,size_t reg_size,void * val_buf,size_t val_size)182 static int mt6370_regmap_read(void *context, const void *reg_buf,
183 size_t reg_size, void *val_buf, size_t val_size)
184 {
185 struct mt6370_info *info = context;
186 const u8 *u8_buf = reg_buf;
187 u8 bank_idx, bank_addr;
188 int ret;
189
190 bank_idx = u8_buf[0];
191 bank_addr = u8_buf[1];
192
193 ret = i2c_smbus_read_i2c_block_data(info->i2c[bank_idx], bank_addr,
194 val_size, val_buf);
195 if (ret < 0)
196 return ret;
197
198 if (ret != val_size)
199 return -EIO;
200
201 return 0;
202 }
203
mt6370_regmap_write(void * context,const void * data,size_t count)204 static int mt6370_regmap_write(void *context, const void *data, size_t count)
205 {
206 struct mt6370_info *info = context;
207 const u8 *u8_buf = data;
208 u8 bank_idx, bank_addr;
209 int len = count - MT6370_MAX_ADDRLEN;
210
211 bank_idx = u8_buf[0];
212 bank_addr = u8_buf[1];
213
214 return i2c_smbus_write_i2c_block_data(info->i2c[bank_idx], bank_addr,
215 len, data + MT6370_MAX_ADDRLEN);
216 }
217
218 static const struct regmap_bus mt6370_regmap_bus = {
219 .read = mt6370_regmap_read,
220 .write = mt6370_regmap_write,
221 };
222
223 static const struct regmap_config mt6370_regmap_config = {
224 .reg_bits = 16,
225 .val_bits = 8,
226 .reg_format_endian = REGMAP_ENDIAN_BIG,
227 .max_register = MT6370_REG_MAXADDR,
228 };
229
mt6370_probe(struct i2c_client * i2c)230 static int mt6370_probe(struct i2c_client *i2c)
231 {
232 struct mt6370_info *info;
233 struct i2c_client *usbc_i2c;
234 struct regmap *regmap;
235 struct device *dev = &i2c->dev;
236 int ret, vid;
237
238 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
239 if (!info)
240 return -ENOMEM;
241
242 usbc_i2c = devm_i2c_new_dummy_device(dev, i2c->adapter,
243 MT6370_USBC_I2CADDR);
244 if (IS_ERR(usbc_i2c))
245 return dev_err_probe(dev, PTR_ERR(usbc_i2c),
246 "Failed to register USBC I2C client\n");
247
248 /* Assign I2C client for PMU and TypeC */
249 info->i2c[MT6370_PMU_I2C] = i2c;
250 info->i2c[MT6370_USBC_I2C] = usbc_i2c;
251
252 regmap = devm_regmap_init(dev, &mt6370_regmap_bus,
253 info, &mt6370_regmap_config);
254 if (IS_ERR(regmap))
255 return dev_err_probe(dev, PTR_ERR(regmap),
256 "Failed to init regmap\n");
257
258 ret = mt6370_check_vendor_info(dev, regmap, &vid);
259 if (ret)
260 return dev_err_probe(dev, ret, "Failed to check vendor info\n");
261
262 ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
263 IRQF_ONESHOT, -1, &mt6370_irq_chip,
264 &info->irq_data);
265 if (ret)
266 return dev_err_probe(dev, ret, "Failed to add irq chip\n");
267
268 switch (vid) {
269 case MT6370_VENID_MT6372P:
270 case MT6370_VENID_MT6372CP:
271 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
272 mt6372_exclusive_devices,
273 ARRAY_SIZE(mt6372_exclusive_devices),
274 NULL, 0,
275 regmap_irq_get_domain(info->irq_data));
276 break;
277 default:
278 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
279 mt6370_exclusive_devices,
280 ARRAY_SIZE(mt6370_exclusive_devices),
281 NULL, 0,
282 regmap_irq_get_domain(info->irq_data));
283 break;
284 }
285
286 if (ret)
287 return dev_err_probe(dev, ret, "Failed to add the exclusive devices\n");
288
289 return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO,
290 mt6370_devices, ARRAY_SIZE(mt6370_devices),
291 NULL, 0,
292 regmap_irq_get_domain(info->irq_data));
293 }
294
295 static const struct of_device_id mt6370_match_table[] = {
296 { .compatible = "mediatek,mt6370" },
297 {}
298 };
299 MODULE_DEVICE_TABLE(of, mt6370_match_table);
300
301 static struct i2c_driver mt6370_driver = {
302 .driver = {
303 .name = "mt6370",
304 .of_match_table = mt6370_match_table,
305 },
306 .probe = mt6370_probe,
307 };
308 module_i2c_driver(mt6370_driver);
309
310 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
311 MODULE_DESCRIPTION("MediaTek MT6370 SubPMIC Driver");
312 MODULE_LICENSE("GPL v2");
313