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
#283: FILE: drivers/gpio/gpio-nct6694.c:210:
+		return -ENOTSUPP;

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#402: FILE: drivers/gpio/gpio-nct6694.c:329:
+		return -ENOTSUPP;

WARNING: line length of 83 exceeds 80 columns
#427: FILE: drivers/gpio/gpio-nct6694.c:354:
+		nct6694_write_msg(data->nct6694, &cmd_hd, &data->irq_trig_falling);

WARNING: line length of 82 exceeds 80 columns
#430: FILE: drivers/gpio/gpio-nct6694.c:357:
+		nct6694_write_msg(data->nct6694, &cmd_hd, &data->irq_trig_rising);

total: 0 errors, 4 warnings, 1 checks, 526 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 d1b67ce80f04 ("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, 4 warnings, 1 checks, 526 lines checked