projects/linux·blob master · refs

362 lines · 9.7 KiB

1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2012 Samsung Electronics Co., Ltd
4 * http://www.samsung.com
5 * Copyright 2025 Linaro Ltd.
6 *
7 * Samsung SxM core driver
8 */
9
10#include <linux/device.h>
11#include <linux/err.h>
12#include <linux/export.h>
13#include <linux/interrupt.h>
14#include <linux/mfd/core.h>
15#include <linux/mfd/samsung/core.h>
16#include <linux/mfd/samsung/irq.h>
17#include <linux/mfd/samsung/s2mps11.h>
18#include <linux/mfd/samsung/s2mps13.h>
19#include <linux/mfd/samsung/s2mu005.h>
20#include <linux/module.h>
21#include <linux/of.h>
22#include <linux/pm.h>
23#include <linux/pm_runtime.h>
24#include <linux/regmap.h>
25#include "sec-core.h"
26
27static const struct resource s5m8767_rtc_resources[] = {
28 DEFINE_RES_IRQ_NAMED(S5M8767_IRQ_RTCA1, "alarm"),
29};
30
31static const struct mfd_cell s5m8767_devs[] = {
32 MFD_CELL_NAME("s5m8767-pmic"),
33 MFD_CELL_RES("s5m-rtc", s5m8767_rtc_resources),
34 MFD_CELL_OF("s5m8767-clk", NULL, NULL, 0, 0, "samsung,s5m8767-clk"),
35};
36
37static const struct mfd_cell s2dos05_devs[] = {
38 MFD_CELL_NAME("s2dos05-regulator"),
39};
40
41static const struct resource s2mpg10_rtc_resources[] = {
42 DEFINE_RES_IRQ_NAMED(S2MPG10_IRQ_RTCA0, "alarm"),
43};
44
45static const struct mfd_cell s2mpg10_devs[] = {
46 MFD_CELL_NAME("s2mpg10-meter"),
47 MFD_CELL_NAME("s2mpg10-regulator"),
48 MFD_CELL_RES("s2mpg10-rtc", s2mpg10_rtc_resources),
49 MFD_CELL_OF("s2mpg10-clk", NULL, NULL, 0, 0, "samsung,s2mpg10-clk"),
50 MFD_CELL_OF("s2mpg10-gpio", NULL, NULL, 0, 0, "samsung,s2mpg10-gpio"),
51};
52
53static const struct mfd_cell s2mpg11_devs[] = {
54 MFD_CELL_NAME("s2mpg11-meter"),
55 MFD_CELL_NAME("s2mpg11-regulator"),
56 MFD_CELL_OF("s2mpg11-gpio", NULL, NULL, 0, 0, "samsung,s2mpg11-gpio"),
57};
58
59static const struct resource s2mps11_rtc_resources[] = {
60 DEFINE_RES_IRQ_NAMED(S2MPS11_IRQ_RTCA0, "alarm"),
61};
62
63static const struct mfd_cell s2mps11_devs[] = {
64 MFD_CELL_NAME("s2mps11-regulator"),
65 MFD_CELL_RES("s2mps14-rtc", s2mps11_rtc_resources),
66 MFD_CELL_OF("s2mps11-clk", NULL, NULL, 0, 0, "samsung,s2mps11-clk"),
67};
68
69static const struct resource s2mps14_rtc_resources[] = {
70 DEFINE_RES_IRQ_NAMED(S2MPS14_IRQ_RTCA0, "alarm"),
71};
72
73static const struct mfd_cell s2mps13_devs[] = {
74 MFD_CELL_NAME("s2mps13-regulator"),
75 MFD_CELL_RES("s2mps13-rtc", s2mps14_rtc_resources),
76 MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),
77};
78
79static const struct mfd_cell s2mps14_devs[] = {
80 MFD_CELL_NAME("s2mps14-regulator"),
81 MFD_CELL_RES("s2mps14-rtc", s2mps14_rtc_resources),
82 MFD_CELL_OF("s2mps14-clk", NULL, NULL, 0, 0, "samsung,s2mps14-clk"),
83};
84
85static const struct mfd_cell s2mps15_devs[] = {
86 MFD_CELL_NAME("s2mps15-regulator"),
87 MFD_CELL_RES("s2mps15-rtc", s2mps14_rtc_resources),
88 MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),
89};
90
91static const struct mfd_cell s2mpa01_devs[] = {
92 MFD_CELL_NAME("s2mpa01-pmic"),
93 MFD_CELL_RES("s2mps14-rtc", s2mps14_rtc_resources),
94};
95
96static const struct mfd_cell s2mpu02_devs[] = {
97 MFD_CELL_NAME("s2mpu02-regulator"),
98};
99
100static const struct resource s2mpu05_rtc_resources[] = {
101 DEFINE_RES_IRQ_NAMED(S2MPU05_IRQ_RTCA0, "alarm"),
102};
103
104static const struct mfd_cell s2mpu05_devs[] = {
105 MFD_CELL_NAME("s2mpu05-regulator"),
106 MFD_CELL_RES("s2mps15-rtc", s2mpu05_rtc_resources),
107};
108
109static const struct resource s2mu005_muic_resources[] = {
110 DEFINE_RES_IRQ_NAMED(S2MU005_IRQ_MUIC_ATTACH, "attach"),
111 DEFINE_RES_IRQ_NAMED(S2MU005_IRQ_MUIC_DETACH, "detach"),
112};
113
114static const struct mfd_cell s2mu005_devs[] = {
115 MFD_CELL_NAME("s2mu005-charger"),
116 MFD_CELL_OF("s2mu005-flash", NULL, NULL, 0, 0, "samsung,s2mu005-flash"),
117 MFD_CELL_OF("s2mu005-muic", s2mu005_muic_resources, NULL, 0, 0, "samsung,s2mu005-muic"),
118 MFD_CELL_OF("s2mu005-rgb", NULL, NULL, 0, 0, "samsung,s2mu005-rgb"),
119};
120
121static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
122{
123 unsigned int reg, mask, val;
124
125 switch (sec_pmic->device_type) {
126 case S2MPG10:
127 case S2MPG11:
128 /* For s2mpg1x, the revision is in a different regmap */
129 return;
130 case S2MU005:
131 reg = S2MU005_REG_ID;
132 mask = S2MU005_ID_MASK;
133 break;
134 default:
135 /* For other device types, REG_ID is always the first register. */
136 reg = S2MPS11_REG_ID;
137 mask = ~0;
138 }
139
140 if (!regmap_read(sec_pmic->regmap_pmic, reg, &val))
141 dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", field_get(mask, val));
142}
143
144static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
145{
146 int err;
147
148 if (sec_pmic->device_type != S2MPS13X)
149 return;
150
151 if (sec_pmic->pdata->disable_wrstbi) {
152 /*
153 * If WRSTBI pin is pulled down this feature must be disabled
154 * because each Suspend to RAM will trigger buck voltage reset
155 * to default values.
156 */
157 err = regmap_update_bits(sec_pmic->regmap_pmic,
158 S2MPS13_REG_WRSTBI,
159 S2MPS13_REG_WRSTBI_MASK, 0x0);
160 if (err)
161 dev_warn(sec_pmic->dev,
162 "Cannot initialize WRSTBI config: %d\n",
163 err);
164 }
165}
166
167/*
168 * Only the common platform data elements for s5m8767 are parsed here from the
169 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
170 * others have to parse their own platform data elements from device tree.
171 *
172 * The s5m8767 platform data structure is instantiated here and the drivers for
173 * the sub-modules need not instantiate another instance while parsing their
174 * platform data.
175 */
176static struct sec_platform_data *
177sec_pmic_parse_dt_pdata(struct device *dev)
178{
179 struct sec_platform_data *pd;
180
181 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
182 if (!pd)
183 return ERR_PTR(-ENOMEM);
184
185 pd->manual_poweroff = of_property_read_bool(dev->of_node,
186 "samsung,s2mps11-acokb-ground");
187 pd->disable_wrstbi = of_property_read_bool(dev->of_node,
188 "samsung,s2mps11-wrstbi-ground");
189 return pd;
190}
191
192int sec_pmic_probe(struct device *dev, int device_type, unsigned int irq,
193 struct regmap *regmap, struct i2c_client *client)
194{
195 struct regmap_irq_chip_data *irq_data;
196 struct sec_platform_data *pdata;
197 const struct mfd_cell *sec_devs;
198 struct sec_pmic_dev *sec_pmic;
199 int ret, num_sec_devs;
200
201 sec_pmic = devm_kzalloc(dev, sizeof(*sec_pmic), GFP_KERNEL);
202 if (!sec_pmic)
203 return -ENOMEM;
204
205 dev_set_drvdata(dev, sec_pmic);
206 sec_pmic->dev = dev;
207 sec_pmic->device_type = device_type;
208 sec_pmic->i2c = client;
209 sec_pmic->irq = irq;
210 sec_pmic->regmap_pmic = regmap;
211
212 pdata = sec_pmic_parse_dt_pdata(sec_pmic->dev);
213 if (IS_ERR(pdata)) {
214 ret = PTR_ERR(pdata);
215 return ret;
216 }
217
218 sec_pmic->pdata = pdata;
219
220 irq_data = sec_irq_init(sec_pmic);
221 if (IS_ERR(irq_data))
222 return PTR_ERR(irq_data);
223
224 dev->coherent_dma_mask = 0;
225 dev->dma_mask = &dev->coherent_dma_mask;
226
227 pm_runtime_set_active(sec_pmic->dev);
228
229 switch (sec_pmic->device_type) {
230 case S5M8767X:
231 sec_devs = s5m8767_devs;
232 num_sec_devs = ARRAY_SIZE(s5m8767_devs);
233 break;
234 case S2DOS05:
235 sec_devs = s2dos05_devs;
236 num_sec_devs = ARRAY_SIZE(s2dos05_devs);
237 break;
238 case S2MPA01:
239 sec_devs = s2mpa01_devs;
240 num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
241 break;
242 case S2MPG10:
243 sec_devs = s2mpg10_devs;
244 num_sec_devs = ARRAY_SIZE(s2mpg10_devs);
245 break;
246 case S2MPG11:
247 sec_devs = s2mpg11_devs;
248 num_sec_devs = ARRAY_SIZE(s2mpg11_devs);
249 break;
250 case S2MPS11X:
251 sec_devs = s2mps11_devs;
252 num_sec_devs = ARRAY_SIZE(s2mps11_devs);
253 break;
254 case S2MPS13X:
255 sec_devs = s2mps13_devs;
256 num_sec_devs = ARRAY_SIZE(s2mps13_devs);
257 break;
258 case S2MPS14X:
259 sec_devs = s2mps14_devs;
260 num_sec_devs = ARRAY_SIZE(s2mps14_devs);
261 break;
262 case S2MPS15X:
263 sec_devs = s2mps15_devs;
264 num_sec_devs = ARRAY_SIZE(s2mps15_devs);
265 break;
266 case S2MPU02:
267 sec_devs = s2mpu02_devs;
268 num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
269 break;
270 case S2MPU05:
271 sec_devs = s2mpu05_devs;
272 num_sec_devs = ARRAY_SIZE(s2mpu05_devs);
273 break;
274 case S2MU005:
275 sec_devs = s2mu005_devs;
276 num_sec_devs = ARRAY_SIZE(s2mu005_devs);
277 break;
278 default:
279 return dev_err_probe(sec_pmic->dev, -EINVAL,
280 "Unsupported device type %d\n",
281 sec_pmic->device_type);
282 }
283 ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
284 NULL, 0, regmap_irq_get_domain(irq_data));
285 if (ret)
286 return ret;
287
288 sec_pmic_configure(sec_pmic);
289 sec_pmic_dump_rev(sec_pmic);
290
291 return ret;
292}
293EXPORT_SYMBOL_GPL(sec_pmic_probe);
294
295void sec_pmic_shutdown(struct device *dev)
296{
297 struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
298 unsigned int reg, mask;
299
300 if (!sec_pmic->pdata->manual_poweroff)
301 return;
302
303 switch (sec_pmic->device_type) {
304 case S2MPS11X:
305 reg = S2MPS11_REG_CTRL1;
306 mask = S2MPS11_CTRL1_PWRHOLD_MASK;
307 break;
308 default:
309 /*
310 * Currently only one board with S2MPS11 needs this, so just
311 * ignore the rest.
312 */
313 dev_warn(sec_pmic->dev,
314 "Unsupported device %d for manual power off\n",
315 sec_pmic->device_type);
316 return;
317 }
318
319 regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
320}
321EXPORT_SYMBOL_GPL(sec_pmic_shutdown);
322
323static int sec_pmic_suspend(struct device *dev)
324{
325 struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
326
327 if (device_may_wakeup(dev))
328 enable_irq_wake(sec_pmic->irq);
329 /*
330 * PMIC IRQ must be disabled during suspend for RTC alarm
331 * to work properly.
332 * When device is woken up from suspend, an
333 * interrupt occurs before resuming I2C bus controller.
334 * The interrupt is handled by regmap_irq_thread which tries
335 * to read RTC registers. This read fails (I2C is still
336 * suspended) and RTC Alarm interrupt is disabled.
337 */
338 disable_irq(sec_pmic->irq);
339
340 return 0;
341}
342
343static int sec_pmic_resume(struct device *dev)
344{
345 struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);
346
347 if (device_may_wakeup(dev))
348 disable_irq_wake(sec_pmic->irq);
349 enable_irq(sec_pmic->irq);
350
351 return 0;
352}
353
354DEFINE_SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
355EXPORT_SYMBOL_GPL(sec_pmic_pm_ops);
356
357MODULE_AUTHOR("Chanwoo Choi <[email protected]>");
358MODULE_AUTHOR("Krzysztof Kozlowski <[email protected]>");
359MODULE_AUTHOR("Sangbeom Kim <[email protected]>");
360MODULE_AUTHOR("André Draszik <[email protected]>");
361MODULE_DESCRIPTION("Core driver for the Samsung S5M");
362MODULE_LICENSE("GPL");