Re: [PATCH v2 2/4] rtc: s32g: add NXP S32G2/S32G3 SoC support
From: Nobuhiro Iwamatsu <hidden>
Date: 2024-10-17 08:34:35
Also in:
linux-devicetree, linux-rtc, lkml
Hello, 2024年10月15日(火) 19:52 Ciprian Costea [off-list ref]:
quoted hunk ↗ jump to hunk
From: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com> Add a RTC driver for NXP S32G2/S32G3 SoCs. The RTC module is used to enable Suspend to RAM (STR) support on NXP S32G2/S32G3 SoC based boards. RTC tracks clock time during system suspend. RTC from S32G2/S32G3 is not battery-powered and it is not kept alive during system reset. Co-developed-by: Bogdan Hamciuc <redacted> Signed-off-by: Bogdan Hamciuc <redacted> Co-developed-by: Ghennadi Procopciuc <redacted> Signed-off-by: Ghennadi Procopciuc <redacted> Signed-off-by: Ciprian Marian Costea <ciprianmarian.costea@oss.nxp.com> --- drivers/rtc/Kconfig | 11 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-s32g.c | 778 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 790 insertions(+) create mode 100644 drivers/rtc/rtc-s32g.cdiff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index e87c3d74565c..18fc3577f6cd 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig@@ -2054,4 +2054,15 @@ config RTC_DRV_SSD202D This driver can also be built as a module, if so, the module will be called "rtc-ssd20xd". +config RTC_DRV_S32G + tristate "RTC driver for S32G2/S32G3 SoCs" + depends on ARCH_S32 || COMPILE_TEST + depends on COMMON_CLK + help + Say yes to enable RTC driver for platforms based on the + S32G2/S32G3 SoC family. + + This RTC module can be used as a wakeup source. + Please note that it is not battery-powered. + endif # RTC_CLASSdiff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 8ee79cb18322..a63d010a753c 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile@@ -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-$(CONFIG_RTC_DRV_S32G) += rtc-s32g.o obj-$(CONFIG_RTC_DRV_S35390A) += rtc-s35390a.o obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o obj-$(CONFIG_RTC_DRV_S5M) += rtc-s5m.odiff --git a/drivers/rtc/rtc-s32g.c b/drivers/rtc/rtc-s32g.c new file mode 100644 index 000000000000..d6502d8bf616 --- /dev/null +++ b/drivers/rtc/rtc-s32g.c
[...]
+enum {
+ DIV1 = 1,
+ DIV32 = 32,
+ DIV512 = 512,
+ DIV512_32 = 16384
+};
+
+struct rtc_time_base {
+ s64 sec;
+ u64 cycles;
+ u64 rollovers;
+ struct rtc_time tm;
+};
+
+struct rtc_priv {
+ struct rtc_device *rdev;
+ struct device *dev;
You don't have to have 'struct device' here. You can refer to 'struct
device' from
member variable dev.parent of 'struct rtc_device'.
Best regards,
Nobuhiro
--
Nobuhiro Iwamatsu
iwamatsu at {nigauri.org / debian.org / kernel.org}
GPG ID: 32247FBB40AD1FA6