CHECK: struct mutex definition without comment
#113: FILE: drivers/gpio/gpio-nct6694.c:40:
+	struct mutex lock;

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#282: FILE: drivers/gpio/gpio-nct6694.c:209:
+		return -ENOTSUPP;

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#401: FILE: drivers/gpio/gpio-nct6694.c:328:
+		return -ENOTSUPP;

WARNING: line length of 83 exceeds 80 columns
#426: FILE: drivers/gpio/gpio-nct6694.c:353:
+		nct6694_write_msg(data->nct6694, &cmd_hd, &data->irq_trig_falling);

WARNING: line length of 82 exceeds 80 columns
#429: FILE: drivers/gpio/gpio-nct6694.c:356:
+		nct6694_write_msg(data->nct6694, &cmd_hd, &data->irq_trig_rising);

WARNING: line length of 83 exceeds 80 columns
#504: FILE: drivers/gpio/gpio-nct6694.c:431:
+		return dev_err_probe(dev, ret, "Failed to get irq trigger type\n");

total: 0 errors, 5 warnings, 1 checks, 495 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 3f1fae2380cc ("gpio: Add Nuvoton NCT6694 GPIO support") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 5 warnings, 1 checks, 495 lines checked