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

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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>

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Claudiu Beznea 2024-10-30 13:01:15 +02:00 • committed by Alexandre Belloni

parent 71c61a45c9

commit d448837760

4 changed files with 918 additions and 0 deletions

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MAINTAINERS

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drivers/rtc/Kconfig

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drivers/rtc/Makefile

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drivers/rtc/rtc-renesas-rtca3.c

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