[PATCH v4 15/15] rtc: rzn1: Add support for Renesas RZ/T2H and RZ/N2H SoCs

From: Lad Prabhakar <[email protected]>

Add support for the RTC block found on the Renesas RZ/T2H (R9A09G077)
and RZ/N2H (R9A09G087) SoCs.

These SoCs integrate a closely related variant of the RZ/N1 RTC IP, but
do not implement the RTCA0SUBU register. Use variant-specific match data
to disable SUBU support for these SoCs.

Signed-off-by: Lad Prabhakar <[email protected]>
---
v3->v4:
- Dropped RB tag from Wolfram.
- Added OF rzt2h_data
- Updated commit message.

v2->v3:
- No changes.

v1->v2:
- Updated commit message to drop reference about RTCA0TCR register.
- Added Reviewed-by tag.
---
 drivers/rtc/rtc-rzn1.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/rtc/rtc-rzn1.c b/drivers/rtc/rtc-rzn1.c
index 6097563c5f13..32f6464fe7d2 100644
--- a/drivers/rtc/rtc-rzn1.c
+++ b/drivers/rtc/rtc-rzn1.c
@@ -508,11 +508,16 @@ static int rzn1_rtc_probe(struct platform_device *pdev)
 	return devm_rtc_register_device(rtc->rtcdev);
 }
 
+static const struct rzn1_rtc_data rzt2h_data = {
+	.has_subu = false,
+};
+
 static const struct rzn1_rtc_data rzn1_data = {
 	.has_subu = true,
 };
 
 static const struct of_device_id rzn1_rtc_of_match[] = {
+	{ .compatible	= "renesas,r9a09g077-rtc", .data = &rzt2h_data },
 	{ .compatible	= "renesas,rzn1-rtc", .data = &rzn1_data },
 	{ /* sentinel */ }
 };
-- 
2.43.0