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 <redacted>
---
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

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