ltc2991.c (3bf3e21c15d4386a5f15118ec39bbc1b67ea5759) ltc2991.c (34c76a51205a32f2665cc2ef1247b4408187d4f0)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2023 Analog Devices, Inc.
4 * Author: Antoniu Miclaus <antoniu.miclaus@analog.com>
5 */
6
7#include <linux/bitops.h>
8#include <linux/err.h>

--- 40 unchanged lines hidden (view full) ---

49#define LTC2991_REPEAT_ACQ_EN BIT(4)
50#define LTC2991_T_INT_FILT_EN BIT(3)
51
52#define LTC2991_MAX_CHANNEL 4
53#define LTC2991_T_INT_CH_NR 4
54#define LTC2991_VCC_CH_NR 0
55
56struct ltc2991_state {
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2023 Analog Devices, Inc.
4 * Author: Antoniu Miclaus <antoniu.miclaus@analog.com>
5 */
6
7#include <linux/bitops.h>
8#include <linux/err.h>

--- 40 unchanged lines hidden (view full) ---

49#define LTC2991_REPEAT_ACQ_EN BIT(4)
50#define LTC2991_T_INT_FILT_EN BIT(3)
51
52#define LTC2991_MAX_CHANNEL 4
53#define LTC2991_T_INT_CH_NR 4
54#define LTC2991_VCC_CH_NR 0
55
56struct ltc2991_state {
57 struct device *dev;
58 struct regmap *regmap;
59 u32 r_sense_uohm[LTC2991_MAX_CHANNEL];
60 bool temp_en[LTC2991_MAX_CHANNEL];
61};
62
63static int ltc2991_read_reg(struct ltc2991_state *st, u8 addr, u8 reg_len,
64 int *val)
65{

--- 212 unchanged lines hidden (view full) ---

278};
279
280static const struct regmap_config ltc2991_regmap_config = {
281 .reg_bits = 8,
282 .val_bits = 8,
283 .max_register = 0x1D,
284};
285
57 struct regmap *regmap;
58 u32 r_sense_uohm[LTC2991_MAX_CHANNEL];
59 bool temp_en[LTC2991_MAX_CHANNEL];
60};
61
62static int ltc2991_read_reg(struct ltc2991_state *st, u8 addr, u8 reg_len,
63 int *val)
64{

--- 212 unchanged lines hidden (view full) ---

277};
278
279static const struct regmap_config ltc2991_regmap_config = {
280 .reg_bits = 8,
281 .val_bits = 8,
282 .max_register = 0x1D,
283};
284
286static int ltc2991_init(struct ltc2991_state *st)
285static int ltc2991_init(struct ltc2991_state *st, struct device *dev)
287{
288 struct fwnode_handle *child;
289 int ret;
290 u32 val, addr;
291 u8 v5_v8_reg_data = 0, v1_v4_reg_data = 0;
292
286{
287 struct fwnode_handle *child;
288 int ret;
289 u32 val, addr;
290 u8 v5_v8_reg_data = 0, v1_v4_reg_data = 0;
291
293 ret = devm_regulator_get_enable(st->dev, "vcc");
292 ret = devm_regulator_get_enable(dev, "vcc");
294 if (ret)
293 if (ret)
295 return dev_err_probe(st->dev, ret,
294 return dev_err_probe(dev, ret,
296 "failed to enable regulator\n");
297
295 "failed to enable regulator\n");
296
298 device_for_each_child_node(st->dev, child) {
297 device_for_each_child_node(dev, child) {
299 ret = fwnode_property_read_u32(child, "reg", &addr);
300 if (ret < 0) {
301 fwnode_handle_put(child);
302 return ret;
303 }
304
305 if (addr > 3) {
306 fwnode_handle_put(child);
307 return -EINVAL;
308 }
309
310 ret = fwnode_property_read_u32(child,
311 "shunt-resistor-micro-ohms",
312 &val);
313 if (!ret) {
314 if (!val)
298 ret = fwnode_property_read_u32(child, "reg", &addr);
299 if (ret < 0) {
300 fwnode_handle_put(child);
301 return ret;
302 }
303
304 if (addr > 3) {
305 fwnode_handle_put(child);
306 return -EINVAL;
307 }
308
309 ret = fwnode_property_read_u32(child,
310 "shunt-resistor-micro-ohms",
311 &val);
312 if (!ret) {
313 if (!val)
315 return dev_err_probe(st->dev, -EINVAL,
314 return dev_err_probe(dev, -EINVAL,
316 "shunt resistor value cannot be zero\n");
317
318 st->r_sense_uohm[addr] = val;
319
320 switch (addr) {
321 case 0:
322 v1_v4_reg_data |= LTC2991_V1_V2_DIFF_EN;
323 break;

--- 32 unchanged lines hidden (view full) ---

356 default:
357 break;
358 }
359 }
360 }
361
362 ret = regmap_write(st->regmap, LTC2991_V5_V8_CTRL, v5_v8_reg_data);
363 if (ret)
315 "shunt resistor value cannot be zero\n");
316
317 st->r_sense_uohm[addr] = val;
318
319 switch (addr) {
320 case 0:
321 v1_v4_reg_data |= LTC2991_V1_V2_DIFF_EN;
322 break;

--- 32 unchanged lines hidden (view full) ---

355 default:
356 break;
357 }
358 }
359 }
360
361 ret = regmap_write(st->regmap, LTC2991_V5_V8_CTRL, v5_v8_reg_data);
362 if (ret)
364 return dev_err_probe(st->dev, ret,
363 return dev_err_probe(dev, ret,
365 "Error: Failed to set V5-V8 CTRL reg.\n");
366
367 ret = regmap_write(st->regmap, LTC2991_V1_V4_CTRL, v1_v4_reg_data);
368 if (ret)
364 "Error: Failed to set V5-V8 CTRL reg.\n");
365
366 ret = regmap_write(st->regmap, LTC2991_V1_V4_CTRL, v1_v4_reg_data);
367 if (ret)
369 return dev_err_probe(st->dev, ret,
368 return dev_err_probe(dev, ret,
370 "Error: Failed to set V1-V4 CTRL reg.\n");
371
372 ret = regmap_write(st->regmap, LTC2991_PWM_TH_LSB_T_INT,
373 LTC2991_REPEAT_ACQ_EN);
374 if (ret)
369 "Error: Failed to set V1-V4 CTRL reg.\n");
370
371 ret = regmap_write(st->regmap, LTC2991_PWM_TH_LSB_T_INT,
372 LTC2991_REPEAT_ACQ_EN);
373 if (ret)
375 return dev_err_probe(st->dev, ret,
376 "Error: Failed to set contiuous mode.\n");
374 return dev_err_probe(dev, ret,
375 "Error: Failed to set continuous mode.\n");
377
378 /* Enable all channels and trigger conversions */
379 return regmap_write(st->regmap, LTC2991_CH_EN_TRIGGER,
380 LTC2991_V7_V8_EN | LTC2991_V5_V6_EN |
381 LTC2991_V3_V4_EN | LTC2991_V1_V2_EN |
382 LTC2991_T_INT_VCC_EN);
383}
384
385static int ltc2991_i2c_probe(struct i2c_client *client)
386{
387 int ret;
388 struct device *hwmon_dev;
389 struct ltc2991_state *st;
390
391 st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
392 if (!st)
393 return -ENOMEM;
394
376
377 /* Enable all channels and trigger conversions */
378 return regmap_write(st->regmap, LTC2991_CH_EN_TRIGGER,
379 LTC2991_V7_V8_EN | LTC2991_V5_V6_EN |
380 LTC2991_V3_V4_EN | LTC2991_V1_V2_EN |
381 LTC2991_T_INT_VCC_EN);
382}
383
384static int ltc2991_i2c_probe(struct i2c_client *client)
385{
386 int ret;
387 struct device *hwmon_dev;
388 struct ltc2991_state *st;
389
390 st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
391 if (!st)
392 return -ENOMEM;
393
395 st->dev = &client->dev;
396 st->regmap = devm_regmap_init_i2c(client, &ltc2991_regmap_config);
397 if (IS_ERR(st->regmap))
398 return PTR_ERR(st->regmap);
399
394 st->regmap = devm_regmap_init_i2c(client, &ltc2991_regmap_config);
395 if (IS_ERR(st->regmap))
396 return PTR_ERR(st->regmap);
397
400 ret = ltc2991_init(st);
398 ret = ltc2991_init(st, &client->dev);
401 if (ret)
402 return ret;
403
404 hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
405 client->name, st,
406 &ltc2991_chip_info,
407 NULL);
408

--- 29 unchanged lines hidden --- 		399 if (ret)
400 return ret;
401
402 hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
403 client->name, st,
404 &ltc2991_chip_info,
405 NULL);
406

--- 29 unchanged lines hidden ---