WARNING: please write a paragraph that describes the config symbol fully
#22: FILE: drivers/rpmsg/Kconfig:31:
+config RPMSG_RTC

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#44: 
new file mode 100644

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#49: FILE: drivers/rpmsg/rpmsg_rtc.c:1:
+/* SPDX-License-Identifier: GPL-2.0 */

CHECK: Prefer kernel type 'u32' over 'uint32_t'
#68: FILE: drivers/rpmsg/rpmsg_rtc.c:20:
+	uint32_t		command;

CHECK: Prefer kernel type 's32' over 'int32_t'
#69: FILE: drivers/rpmsg/rpmsg_rtc.c:21:
+	int32_t			result;

CHECK: Prefer kernel type 'u64' over 'uint64_t'
#70: FILE: drivers/rpmsg/rpmsg_rtc.c:22:
+	uint64_t		cookie;

CHECK: Prefer kernel type 's64' over 'int64_t'
#75: FILE: drivers/rpmsg/rpmsg_rtc.c:27:
+	int64_t			sec;

CHECK: Prefer kernel type 's32' over 'int32_t'
#76: FILE: drivers/rpmsg/rpmsg_rtc.c:28:
+	int32_t			nsec;

CHECK: Prefer kernel type 's64' over 'int64_t'
#83: FILE: drivers/rpmsg/rpmsg_rtc.c:35:
+	int64_t			sec;

CHECK: Prefer kernel type 's32' over 'int32_t'
#84: FILE: drivers/rpmsg/rpmsg_rtc.c:36:
+	int32_t			nsec;

CHECK: Prefer kernel type 'u32' over 'uint32_t'
#85: FILE: drivers/rpmsg/rpmsg_rtc.c:37:
+	uint32_t		id;

CHECK: Prefer kernel type 'u32' over 'uint32_t'
#90: FILE: drivers/rpmsg/rpmsg_rtc.c:42:
+	uint32_t		id;

CHECK: Alignment should match open parenthesis
#106: FILE: drivers/rpmsg/rpmsg_rtc.c:58:
+static int rpmsg_rtc_set_handler(struct rpmsg_device *rpdev,
+		void *data, int len, void *priv, u32 src)

CHECK: Alignment should match open parenthesis
#119: FILE: drivers/rpmsg/rpmsg_rtc.c:71:
+static int rpmsg_rtc_get_handler(struct rpmsg_device *rpdev,
+		void *data, int len, void *priv, u32 src)

CHECK: Alignment should match open parenthesis
#157: FILE: drivers/rpmsg/rpmsg_rtc.c:109:
+static int rpmsg_rtc_alarm_set_handler(struct rpmsg_device *rpdev,
+		void *data, int len, void *priv_, u32 src)

CHECK: Comparison to NULL could be written "!alarm"
#164: FILE: drivers/rpmsg/rpmsg_rtc.c:116:
+	if (alarm == NULL) {

WARNING: line over 80 characters
#170: FILE: drivers/rpmsg/rpmsg_rtc.c:122:
+			alarm_init(&alarm->alarm, ALARM_REALTIME, rpmsg_rtc_alarm_func);

WARNING: line over 80 characters
#171: FILE: drivers/rpmsg/rpmsg_rtc.c:123:
+			if (idr_alloc(&priv->alarms, alarm, msg->id, msg->id, GFP_KERNEL) < 0) {

CHECK: braces {} should be used on all arms of this statement
#178: FILE: drivers/rpmsg/rpmsg_rtc.c:130:
+	if (alarm) {
[...]
+	} else
[...]

CHECK: Unbalanced braces around else statement
#181: FILE: drivers/rpmsg/rpmsg_rtc.c:133:
+	} else

CHECK: Alignment should match open parenthesis
#188: FILE: drivers/rpmsg/rpmsg_rtc.c:140:
+static int rpmsg_rtc_alarm_cancel_handler(struct rpmsg_device *rpdev,
+		void *data, int len, void *priv_, u32 src)

CHECK: Alignment should match open parenthesis
#214: FILE: drivers/rpmsg/rpmsg_rtc.c:166:
+static int rpmsg_rtc_callback(struct rpmsg_device *rpdev,
+		void *data, int len, void *priv, u32 src)

CHECK: Prefer kernel type 'u32' over 'uint32_t'
#217: FILE: drivers/rpmsg/rpmsg_rtc.c:169:
+	uint32_t command = header->command;

WARNING: line over 80 characters
#223: FILE: drivers/rpmsg/rpmsg_rtc.c:175:
+			dev_err(&rpdev->dev, "command handle error %d\n", command);

CHECK: Alignment should match open parenthesis
#277: FILE: drivers/rpmsg/rpmsg_rtc.c:229:
+module_driver(rpmsg_rtc_driver,
+		register_rpmsg_driver,

total: 0 errors, 6 warnings, 19 checks, 254 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.

./linux-sof-driver/0001-rpmsg-Add-rtc-API-redirection-driver.patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.