WARNING: DT compatible string "microchip,zl3073x-i2c" appears un-documented -- check ./Documentation/devicetree/bindings/
#213: FILE: drivers/mfd/zl3073x-i2c.c:15:
+	{ .compatible = "microchip,zl3073x-i2c" },

WARNING: DT compatible string "microchip,zl3073x-spi" appears un-documented -- check ./Documentation/devicetree/bindings/
#290: FILE: drivers/mfd/zl3073x-spi.c:16:
+	{ .compatible = "microchip,zl3073x-spi" },

CHECK: struct mutex definition without comment
#382: FILE: include/linux/mfd/zl3073x.h:12:
+	struct mutex		lock;

total: 0 errors, 2 warnings, 1 checks, 296 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 75c5c9fc5837 ("mfd: Add Microchip ZL3073x 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, 2 warnings, 1 checks, 296 lines checked