Commit d4488377 authored Oct 30, 2024 by Claudiu Beznea Committed by Alexandre Belloni Nov 01, 2024

rtc: renesas-rtca3: Add driver for RTCA-3 available on Renesas RZ/G3S SoC

The RTC IP (RTCA-3) available on the Renesas RZ/G3S SoC has calendar count
mode and binary count mode (selectable though RCR2.CNTMD) capabilities,
alarm capabilities, clock error correction capabilities. It can generate
alarm, period, carry interrupts.

Add a driver for RTCA-3 IP. The driver implements calendar count mode (as
the conversion b/w RTC and system time is simpler, done with bcd2bin(),
bin2bcd()), read and set time, read and set alarm, read and set
an offset.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/r/20241030110120.332802-6-claudiu.beznea.uj@bp.renesas.com

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

parent 71c61a45

MAINTAINERS

+8 −0

Original line number	Diff line number	Diff line
		@@ -19721,6 +19721,14 @@ S: Supported
		F: Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml
		F: drivers/counter/rz-mtu3-cnt.c

		RENESAS RTCA-3 RTC DRIVER
		M: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
		L: linux-rtc@vger.kernel.org
		L: linux-renesas-soc@vger.kernel.org
		S: Supported
		F: Documentation/devicetree/bindings/rtc/renesas,rz-rtca3.yaml
		F: drivers/rtc/rtc-renesas-rtca3.c

		RENESAS RZ/N1 A5PSW SWITCH DRIVER
		M: Clément Léger <clement.leger@bootlin.com>
		L: linux-renesas-soc@vger.kernel.org

drivers/rtc/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -2005,6 +2005,16 @@ config RTC_DRV_MA35D1
		This driver can also be built as a module, if so, the module
		will be called "rtc-ma35d1".

		config RTC_DRV_RENESAS_RTCA3
		tristate "Renesas RTCA-3 RTC"
		depends on ARCH_RENESAS
		help
		If you say yes here you get support for the Renesas RTCA-3 RTC
		available on the Renesas RZ/G3S SoC.

		This driver can also be built as a module, if so, the module
		will be called "rtc-rtca3".

		comment "HID Sensor RTC drivers"

		config RTC_DRV_HID_SENSOR_TIME

drivers/rtc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -158,6 +158,7 @@ obj-$(CONFIG_RTC_DRV_RX8025) += rtc-rx8025.o
		obj-$(CONFIG_RTC_DRV_RX8111) += rtc-rx8111.o
		obj-$(CONFIG_RTC_DRV_RX8581) += rtc-rx8581.o
		obj-$(CONFIG_RTC_DRV_RZN1) += rtc-rzn1.o
		obj-$(CONFIG_RTC_DRV_RENESAS_RTCA3) += rtc-renesas-rtca3.o
		obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o
		obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o
		obj-$(CONFIG_RTC_DRV_S5M) += rtc-s5m.o

drivers/rtc/rtc-renesas-rtca3.c

0 → 100644

+899 −0

File added.

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