Re: [PATCH V4 2/4] rtc: add i.MX system controller RTC support

[Alexandre Belloni]

Hello,

On 29/11/2018 01:50:11+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:
> V3->V4:
>   *remove unnecessary headfile included;
>   *fix potential memory currpution for the message responce;
>   *update the compatible string name to start with "fsl" instead of "nxp".
>  drivers/rtc/Kconfig      |  6 +++
>  drivers/rtc/Makefile     |  1 +
>  drivers/rtc/rtc-imx-sc.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 105 insertions(+)
>  create mode 100644 drivers/rtc/rtc-imx-sc.c
> 

I applied it on my test branch and this makes sparc64-allyesconfig fail
with:

   drivers/rtc/rtc-imx-sc.o: In function `imx_sc_rtc_read_time':
   rtc-imx-sc.c:(.text+0x34): undefined reference to `imx_scu_call_rpc'
   drivers/rtc/rtc-imx-sc.o: In function `imx_sc_rtc_probe':
   rtc-imx-sc.c:(.text+0x90): undefined reference to `imx_scu_get_handle'



-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com