On 20/12/2018 08:56:16+0000, Anson Huang wrote: > i.MX8QXP is an ARMv8 SoC which has a Cortex-M4 system controller > inside, the system controller is in charge of controlling power, > clock and secure rtc etc.. > > This patch adds i.MX system controller RTC driver support, > Linux kernel has to communicate with system controller via MU > (message unit) IPC to set/get RTC time and other alarm functions, > since the RTC set time needs to be done in secure EL3 mode (required > by system controller firmware) and alarm functions needs to be done > with general MU IRQ handle, these depend on other components which > are NOT ready, so this patch ONLY enables the RTC time read. > > Signed-off-by: Anson Huang <Anson.Huang@xxxxxxx> > --- > ChangeLog since V4: > - Add dependency on IMX_SCU to avoid compile error when IMX_SCU is NOT enabled; > - Use dev_err instead of pr_err; > - Remove unneccssary different errors check in imx_scu_get_handle which is already done in API. > --- > drivers/rtc/Kconfig | 7 ++++ > drivers/rtc/Makefile | 1 + > drivers/rtc/rtc-imx-sc.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 99 insertions(+) > create mode 100644 drivers/rtc/rtc-imx-sc.c > Applied, thanks. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
