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10#include <linux/err.h>
11#include <linux/hwmon.h>
12#include <linux/hwmon-sysfs.h>
13#include <linux/init.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/platform_device.h>
18#include <linux/property.h>
19
20#include <linux/mfd/da9052/da9052.h>
21#include <linux/mfd/da9052/reg.h>
22#include <linux/regulator/consumer.h>
23
24struct da9052_hwmon {
25 struct da9052 *da9052;
26 struct mutex hwmon_lock;
27 bool tsi_as_adc;
28 int tsiref_mv;
29 struct regulator *tsiref;
30 struct completion tsidone;
31};
32
33static const char * const input_names[] = {
34 [DA9052_ADC_VDDOUT] = "VDDOUT",
35 [DA9052_ADC_ICH] = "CHARGING CURRENT",
36 [DA9052_ADC_TBAT] = "BATTERY TEMP",
37 [DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
38 [DA9052_ADC_IN4] = "ADC IN4",
39 [DA9052_ADC_IN5] = "ADC IN5",
40 [DA9052_ADC_IN6] = "ADC IN6",
41 [DA9052_ADC_TSI_XP] = "ADC TS X+",
42 [DA9052_ADC_TSI_YP] = "ADC TS Y+",
43 [DA9052_ADC_TSI_XN] = "ADC TS X-",
44 [DA9052_ADC_TSI_YN] = "ADC TS Y-",
45 [DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
46 [DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE",
47};
48
49
50static inline int volt_reg_to_mv(int value)
51{
52 return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;
53}
54
55
56static inline int input_reg_to_mv(int value)
57{
58 return DIV_ROUND_CLOSEST(value * 2500, 1023);
59}
60
61
62static inline int vbbat_reg_to_mv(int value)
63{
64 return DIV_ROUND_CLOSEST(value * 5000, 1023);
65}
66
67static inline int input_tsireg_to_mv(struct da9052_hwmon *hwmon, int value)
68{
69 return DIV_ROUND_CLOSEST(value * hwmon->tsiref_mv, 1023);
70}
71
72static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
73{
74 return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
75 DA9052_ADCCONT_AUTOVDDEN,
76 DA9052_ADCCONT_AUTOVDDEN);
77}
78
79static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
80{
81 return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
82 DA9052_ADCCONT_AUTOVDDEN, 0);
83}
84
85static ssize_t da9052_vddout_show(struct device *dev,
86 struct device_attribute *devattr, char *buf)
87{
88 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
89 int ret, vdd;
90
91 mutex_lock(&hwmon->hwmon_lock);
92
93 ret = da9052_enable_vddout_channel(hwmon->da9052);
94 if (ret < 0)
95 goto hwmon_err;
96
97 vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
98 if (vdd < 0) {
99 ret = vdd;
100 goto hwmon_err_release;
101 }
102
103 ret = da9052_disable_vddout_channel(hwmon->da9052);
104 if (ret < 0)
105 goto hwmon_err;
106
107 mutex_unlock(&hwmon->hwmon_lock);
108 return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));
109
110hwmon_err_release:
111 da9052_disable_vddout_channel(hwmon->da9052);
112hwmon_err:
113 mutex_unlock(&hwmon->hwmon_lock);
114 return ret;
115}
116
117static ssize_t da9052_ich_show(struct device *dev,
118 struct device_attribute *devattr, char *buf)
119{
120 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
121 int ret;
122
123 ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
124 if (ret < 0)
125 return ret;
126
127
128 return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
129}
130
131static ssize_t da9052_tbat_show(struct device *dev,
132 struct device_attribute *devattr, char *buf)
133{
134 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
135
136 return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
137}
138
139static ssize_t da9052_vbat_show(struct device *dev,
140 struct device_attribute *devattr, char *buf)
141{
142 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
143 int ret;
144
145 ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
146 if (ret < 0)
147 return ret;
148
149 return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
150}
151
152static ssize_t da9052_misc_channel_show(struct device *dev,
153 struct device_attribute *devattr,
154 char *buf)
155{
156 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
157 int channel = to_sensor_dev_attr(devattr)->index;
158 int ret;
159
160 ret = da9052_adc_manual_read(hwmon->da9052, channel);
161 if (ret < 0)
162 return ret;
163
164 return sprintf(buf, "%d\n", input_reg_to_mv(ret));
165}
166
167static int da9052_request_tsi_read(struct da9052_hwmon *hwmon, int channel)
168{
169 u8 val = DA9052_TSICONTB_TSIMAN;
170
171 switch (channel) {
172 case DA9052_ADC_TSI_XP:
173 val |= DA9052_TSICONTB_TSIMUX_XP;
174 break;
175 case DA9052_ADC_TSI_YP:
176 val |= DA9052_TSICONTB_TSIMUX_YP;
177 break;
178 case DA9052_ADC_TSI_XN:
179 val |= DA9052_TSICONTB_TSIMUX_XN;
180 break;
181 case DA9052_ADC_TSI_YN:
182 val |= DA9052_TSICONTB_TSIMUX_YN;
183 break;
184 }
185
186 return da9052_reg_write(hwmon->da9052, DA9052_TSI_CONT_B_REG, val);
187}
188
189static int da9052_get_tsi_result(struct da9052_hwmon *hwmon, int channel)
190{
191 u8 regs[3];
192 int msb, lsb, err;
193
194
195 err = da9052_group_read(hwmon->da9052, DA9052_TSI_X_MSB_REG,
196 ARRAY_SIZE(regs), regs);
197 if (err)
198 return err;
199
200 switch (channel) {
201 case DA9052_ADC_TSI_XP:
202 case DA9052_ADC_TSI_XN:
203 msb = regs[0] << DA9052_TSILSB_TSIXL_BITS;
204 lsb = regs[2] & DA9052_TSILSB_TSIXL;
205 lsb >>= DA9052_TSILSB_TSIXL_SHIFT;
206 break;
207 case DA9052_ADC_TSI_YP:
208 case DA9052_ADC_TSI_YN:
209 msb = regs[1] << DA9052_TSILSB_TSIYL_BITS;
210 lsb = regs[2] & DA9052_TSILSB_TSIYL;
211 lsb >>= DA9052_TSILSB_TSIYL_SHIFT;
212 break;
213 default:
214 return -EINVAL;
215 }
216
217 return msb | lsb;
218}
219
220
221static ssize_t __da9052_read_tsi(struct device *dev, int channel)
222{
223 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
224 int ret;
225
226 reinit_completion(&hwmon->tsidone);
227
228 ret = da9052_request_tsi_read(hwmon, channel);
229 if (ret < 0)
230 return ret;
231
232
233 if (!wait_for_completion_timeout(&hwmon->tsidone,
234 msecs_to_jiffies(500)))
235 return -ETIMEDOUT;
236
237 return da9052_get_tsi_result(hwmon, channel);
238}
239
240static ssize_t da9052_tsi_show(struct device *dev,
241 struct device_attribute *devattr, char *buf)
242{
243 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
244 int channel = to_sensor_dev_attr(devattr)->index;
245 int ret;
246
247 mutex_lock(&hwmon->hwmon_lock);
248 ret = __da9052_read_tsi(dev, channel);
249 mutex_unlock(&hwmon->hwmon_lock);
250
251 if (ret < 0)
252 return ret;
253 else
254 return sprintf(buf, "%d\n", input_tsireg_to_mv(hwmon, ret));
255}
256
257static ssize_t da9052_tjunc_show(struct device *dev,
258 struct device_attribute *devattr, char *buf)
259{
260 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
261 int tjunc;
262 int toffset;
263
264 tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
265 if (tjunc < 0)
266 return tjunc;
267
268 toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
269 if (toffset < 0)
270 return toffset;
271
272
273
274
275
276 return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
277}
278
279static ssize_t da9052_vbbat_show(struct device *dev,
280 struct device_attribute *devattr, char *buf)
281{
282 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
283 int ret;
284
285 ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
286 if (ret < 0)
287 return ret;
288
289 return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
290}
291
292static ssize_t label_show(struct device *dev,
293 struct device_attribute *devattr, char *buf)
294{
295 return sprintf(buf, "%s\n",
296 input_names[to_sensor_dev_attr(devattr)->index]);
297}
298
299static umode_t da9052_channel_is_visible(struct kobject *kobj,
300 struct attribute *attr, int index)
301{
302 struct device *dev = container_of(kobj, struct device, kobj);
303 struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
304 struct device_attribute *dattr = container_of(attr,
305 struct device_attribute, attr);
306 struct sensor_device_attribute *sattr = to_sensor_dev_attr(dattr);
307
308 if (!hwmon->tsi_as_adc) {
309 switch (sattr->index) {
310 case DA9052_ADC_TSI_XP:
311 case DA9052_ADC_TSI_YP:
312 case DA9052_ADC_TSI_XN:
313 case DA9052_ADC_TSI_YN:
314 return 0;
315 }
316 }
317
318 return attr->mode;
319}
320
321static SENSOR_DEVICE_ATTR_RO(in0_input, da9052_vddout, DA9052_ADC_VDDOUT);
322static SENSOR_DEVICE_ATTR_RO(in0_label, label, DA9052_ADC_VDDOUT);
323static SENSOR_DEVICE_ATTR_RO(in3_input, da9052_vbat, DA9052_ADC_VBAT);
324static SENSOR_DEVICE_ATTR_RO(in3_label, label, DA9052_ADC_VBAT);
325static SENSOR_DEVICE_ATTR_RO(in4_input, da9052_misc_channel, DA9052_ADC_IN4);
326static SENSOR_DEVICE_ATTR_RO(in4_label, label, DA9052_ADC_IN4);
327static SENSOR_DEVICE_ATTR_RO(in5_input, da9052_misc_channel, DA9052_ADC_IN5);
328static SENSOR_DEVICE_ATTR_RO(in5_label, label, DA9052_ADC_IN5);
329static SENSOR_DEVICE_ATTR_RO(in6_input, da9052_misc_channel, DA9052_ADC_IN6);
330static SENSOR_DEVICE_ATTR_RO(in6_label, label, DA9052_ADC_IN6);
331static SENSOR_DEVICE_ATTR_RO(in9_input, da9052_vbbat, DA9052_ADC_VBBAT);
332static SENSOR_DEVICE_ATTR_RO(in9_label, label, DA9052_ADC_VBBAT);
333
334static SENSOR_DEVICE_ATTR_RO(in70_input, da9052_tsi, DA9052_ADC_TSI_XP);
335static SENSOR_DEVICE_ATTR_RO(in70_label, label, DA9052_ADC_TSI_XP);
336static SENSOR_DEVICE_ATTR_RO(in71_input, da9052_tsi, DA9052_ADC_TSI_XN);
337static SENSOR_DEVICE_ATTR_RO(in71_label, label, DA9052_ADC_TSI_XN);
338static SENSOR_DEVICE_ATTR_RO(in72_input, da9052_tsi, DA9052_ADC_TSI_YP);
339static SENSOR_DEVICE_ATTR_RO(in72_label, label, DA9052_ADC_TSI_YP);
340static SENSOR_DEVICE_ATTR_RO(in73_input, da9052_tsi, DA9052_ADC_TSI_YN);
341static SENSOR_DEVICE_ATTR_RO(in73_label, label, DA9052_ADC_TSI_YN);
342
343static SENSOR_DEVICE_ATTR_RO(curr1_input, da9052_ich, DA9052_ADC_ICH);
344static SENSOR_DEVICE_ATTR_RO(curr1_label, label, DA9052_ADC_ICH);
345
346static SENSOR_DEVICE_ATTR_RO(temp2_input, da9052_tbat, DA9052_ADC_TBAT);
347static SENSOR_DEVICE_ATTR_RO(temp2_label, label, DA9052_ADC_TBAT);
348static SENSOR_DEVICE_ATTR_RO(temp8_input, da9052_tjunc, DA9052_ADC_TJUNC);
349static SENSOR_DEVICE_ATTR_RO(temp8_label, label, DA9052_ADC_TJUNC);
350
351static struct attribute *da9052_attrs[] = {
352 &sensor_dev_attr_in0_input.dev_attr.attr,
353 &sensor_dev_attr_in0_label.dev_attr.attr,
354 &sensor_dev_attr_in3_input.dev_attr.attr,
355 &sensor_dev_attr_in3_label.dev_attr.attr,
356 &sensor_dev_attr_in4_input.dev_attr.attr,
357 &sensor_dev_attr_in4_label.dev_attr.attr,
358 &sensor_dev_attr_in5_input.dev_attr.attr,
359 &sensor_dev_attr_in5_label.dev_attr.attr,
360 &sensor_dev_attr_in6_input.dev_attr.attr,
361 &sensor_dev_attr_in6_label.dev_attr.attr,
362 &sensor_dev_attr_in70_input.dev_attr.attr,
363 &sensor_dev_attr_in70_label.dev_attr.attr,
364 &sensor_dev_attr_in71_input.dev_attr.attr,
365 &sensor_dev_attr_in71_label.dev_attr.attr,
366 &sensor_dev_attr_in72_input.dev_attr.attr,
367 &sensor_dev_attr_in72_label.dev_attr.attr,
368 &sensor_dev_attr_in73_input.dev_attr.attr,
369 &sensor_dev_attr_in73_label.dev_attr.attr,
370 &sensor_dev_attr_in9_input.dev_attr.attr,
371 &sensor_dev_attr_in9_label.dev_attr.attr,
372 &sensor_dev_attr_curr1_input.dev_attr.attr,
373 &sensor_dev_attr_curr1_label.dev_attr.attr,
374 &sensor_dev_attr_temp2_input.dev_attr.attr,
375 &sensor_dev_attr_temp2_label.dev_attr.attr,
376 &sensor_dev_attr_temp8_input.dev_attr.attr,
377 &sensor_dev_attr_temp8_label.dev_attr.attr,
378 NULL
379};
380
381static const struct attribute_group da9052_group = {
382 .attrs = da9052_attrs,
383 .is_visible = da9052_channel_is_visible,
384};
385__ATTRIBUTE_GROUPS(da9052);
386
387static irqreturn_t da9052_tsi_datardy_irq(int irq, void *data)
388{
389 struct da9052_hwmon *hwmon = data;
390
391 complete(&hwmon->tsidone);
392 return IRQ_HANDLED;
393}
394
395static int da9052_hwmon_probe(struct platform_device *pdev)
396{
397 struct device *dev = &pdev->dev;
398 struct da9052_hwmon *hwmon;
399 struct device *hwmon_dev;
400 int err;
401
402 hwmon = devm_kzalloc(dev, sizeof(struct da9052_hwmon), GFP_KERNEL);
403 if (!hwmon)
404 return -ENOMEM;
405
406 platform_set_drvdata(pdev, hwmon);
407
408 mutex_init(&hwmon->hwmon_lock);
409 hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
410
411 init_completion(&hwmon->tsidone);
412
413 hwmon->tsi_as_adc =
414 device_property_read_bool(pdev->dev.parent, "dlg,tsi-as-adc");
415
416 if (hwmon->tsi_as_adc) {
417 hwmon->tsiref = devm_regulator_get(pdev->dev.parent, "tsiref");
418 if (IS_ERR(hwmon->tsiref)) {
419 err = PTR_ERR(hwmon->tsiref);
420 dev_err(&pdev->dev, "failed to get tsiref: %d", err);
421 return err;
422 }
423
424 err = regulator_enable(hwmon->tsiref);
425 if (err)
426 return err;
427
428 hwmon->tsiref_mv = regulator_get_voltage(hwmon->tsiref);
429 if (hwmon->tsiref_mv < 0) {
430 err = hwmon->tsiref_mv;
431 goto exit_regulator;
432 }
433
434
435 hwmon->tsiref_mv /= 1000;
436
437
438 if (hwmon->tsiref_mv < 1800 || hwmon->tsiref_mv > 2600) {
439 dev_err(hwmon->da9052->dev, "invalid TSIREF voltage: %d",
440 hwmon->tsiref_mv);
441 err = -ENXIO;
442 goto exit_regulator;
443 }
444
445
446 da9052_reg_write(hwmon->da9052, DA9052_TSI_CONT_A_REG, 0x00);
447
448
449 da9052_reg_update(hwmon->da9052, DA9052_ADC_CONT_REG,
450 DA9052_ADCCONT_ADCMODE,
451 DA9052_ADCCONT_ADCMODE);
452
453 err = da9052_request_irq(hwmon->da9052, DA9052_IRQ_TSIREADY,
454 "tsiready-irq", da9052_tsi_datardy_irq,
455 hwmon);
456 if (err) {
457 dev_err(&pdev->dev, "Failed to register TSIRDY IRQ: %d",
458 err);
459 goto exit_regulator;
460 }
461 }
462
463 hwmon_dev = devm_hwmon_device_register_with_groups(dev, "da9052",
464 hwmon,
465 da9052_groups);
466 err = PTR_ERR_OR_ZERO(hwmon_dev);
467 if (err)
468 goto exit_irq;
469
470 return 0;
471
472exit_irq:
473 if (hwmon->tsi_as_adc)
474 da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
475exit_regulator:
476 if (hwmon->tsiref)
477 regulator_disable(hwmon->tsiref);
478
479 return err;
480}
481
482static int da9052_hwmon_remove(struct platform_device *pdev)
483{
484 struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
485
486 if (hwmon->tsi_as_adc) {
487 da9052_free_irq(hwmon->da9052, DA9052_IRQ_TSIREADY, hwmon);
488 regulator_disable(hwmon->tsiref);
489 }
490
491 return 0;
492}
493
494static struct platform_driver da9052_hwmon_driver = {
495 .probe = da9052_hwmon_probe,
496 .remove = da9052_hwmon_remove,
497 .driver = {
498 .name = "da9052-hwmon",
499 },
500};
501
502module_platform_driver(da9052_hwmon_driver);
503
504MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
505MODULE_DESCRIPTION("DA9052 HWMON driver");
506MODULE_LICENSE("GPL");
507MODULE_ALIAS("platform:da9052-hwmon");
508
