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SubjectRe: [PATCH v2 1/2] hwmon: (ucd9000) Add gpio chip interface
Hi Christopher,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.16-rc5 next-20180315]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Eddie-James/hwmon-ucd9000-Add-gpio-and-debugfs-interfaces/20180316-125048
config: x86_64-randconfig-x017-201810 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

drivers/hwmon/pmbus/ucd9000.c: In function 'ucd9000_probe':
>> drivers/hwmon/pmbus/ucd9000.c:457:12: error: 'struct gpio_chip' has no member named 'of_node'
data->gpio.of_node = client->dev.of_node;
^

vim +457 drivers/hwmon/pmbus/ucd9000.c

308
309 static int ucd9000_probe(struct i2c_client *client,
310 const struct i2c_device_id *id)
311 {
312 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
313 struct ucd9000_data *data;
314 struct pmbus_driver_info *info;
315 const struct i2c_device_id *mid;
316 enum chips chip;
317 int i, ret;
318
319 if (!i2c_check_functionality(client->adapter,
320 I2C_FUNC_SMBUS_BYTE_DATA |
321 I2C_FUNC_SMBUS_BLOCK_DATA))
322 return -ENODEV;
323
324 ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID,
325 block_buffer);
326 if (ret < 0) {
327 dev_err(&client->dev, "Failed to read device ID\n");
328 return ret;
329 }
330 block_buffer[ret] = '\0';
331 dev_info(&client->dev, "Device ID %s\n", block_buffer);
332
333 for (mid = ucd9000_id; mid->name[0]; mid++) {
334 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
335 break;
336 }
337 if (!mid->name[0]) {
338 dev_err(&client->dev, "Unsupported device\n");
339 return -ENODEV;
340 }
341
342 if (client->dev.of_node)
343 chip = (enum chips)of_device_get_match_data(&client->dev);
344 else
345 chip = id->driver_data;
346
347 if (chip != ucd9000 && chip != mid->driver_data)
348 dev_notice(&client->dev,
349 "Device mismatch: Configured %s, detected %s\n",
350 id->name, mid->name);
351
352 data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data),
353 GFP_KERNEL);
354 if (!data)
355 return -ENOMEM;
356 info = &data->info;
357
358 ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES);
359 if (ret < 0) {
360 dev_err(&client->dev,
361 "Failed to read number of active pages\n");
362 return ret;
363 }
364 info->pages = ret;
365 if (!info->pages) {
366 dev_err(&client->dev, "No pages configured\n");
367 return -ENODEV;
368 }
369
370 /* The internal temperature sensor is always active */
371 info->func[0] = PMBUS_HAVE_TEMP;
372
373 /* Everything else is configurable */
374 ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG,
375 block_buffer);
376 if (ret <= 0) {
377 dev_err(&client->dev, "Failed to read configuration data\n");
378 return -ENODEV;
379 }
380 for (i = 0; i < ret; i++) {
381 int page = UCD9000_MON_PAGE(block_buffer[i]);
382
383 if (page >= info->pages)
384 continue;
385
386 switch (UCD9000_MON_TYPE(block_buffer[i])) {
387 case UCD9000_MON_VOLTAGE:
388 case UCD9000_MON_VOLTAGE_HW:
389 info->func[page] |= PMBUS_HAVE_VOUT
390 | PMBUS_HAVE_STATUS_VOUT;
391 break;
392 case UCD9000_MON_TEMPERATURE:
393 info->func[page] |= PMBUS_HAVE_TEMP2
394 | PMBUS_HAVE_STATUS_TEMP;
395 break;
396 case UCD9000_MON_CURRENT:
397 info->func[page] |= PMBUS_HAVE_IOUT
398 | PMBUS_HAVE_STATUS_IOUT;
399 break;
400 default:
401 break;
402 }
403 }
404
405 /* Fan configuration */
406 if (mid->driver_data == ucd90124) {
407 for (i = 0; i < UCD9000_NUM_FAN; i++) {
408 i2c_smbus_write_byte_data(client,
409 UCD9000_FAN_CONFIG_INDEX, i);
410 ret = i2c_smbus_read_block_data(client,
411 UCD9000_FAN_CONFIG,
412 data->fan_data[i]);
413 if (ret < 0)
414 return ret;
415 }
416 i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);
417
418 info->read_byte_data = ucd9000_read_byte_data;
419 info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
420 | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
421 }
422
423 /*
424 * Note:
425 *
426 * Pinmux support has not been added to the new gpio_chip.
427 * This support should be added when possible given the mux
428 * behavior of these IO devices.
429 */
430 data->gpio.label = (const char *)&client->name;
431 data->gpio.get_direction = ucd9000_gpio_get_direction;
432 data->gpio.direction_input = ucd9000_gpio_direction_input;
433 data->gpio.direction_output = ucd9000_gpio_direction_output;
434 data->gpio.get = ucd9000_gpio_get;
435 data->gpio.set = ucd9000_gpio_set;
436 data->gpio.can_sleep = 1;
437 data->gpio.base = -1;
438
439 switch (mid->driver_data) {
440 case ucd9090:
441 data->gpio.ngpio = UCD9090_NUM_GPIOS;
442 break;
443 case ucd90120:
444 case ucd90124:
445 case ucd90160:
446 data->gpio.ngpio = UCD901XX_NUM_GPIOS;
447 break;
448 case ucd90910:
449 data->gpio.ngpio = UCD90910_NUM_GPIOS;
450 break;
451 default:
452 break;
453 }
454
455 data->gpio.parent = &client->dev;
456 data->gpio.owner = THIS_MODULE;
> 457 data->gpio.of_node = client->dev.of_node;
458
459 if (data->gpio.ngpio) {
460 ret = devm_gpiochip_add_data(&client->dev, &data->gpio,
461 client);
462 if (ret)
463 dev_warn(&client->dev, "Could not add gpiochip: %d\n",
464 ret);
465 }
466
467 return pmbus_do_probe(client, mid, info);
468 }
469

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