Re: [PATCH v2 3/3] rtc: stm32: add stm32mp1 rtc support

From: Amelie DELAUNAY
Date: Thu May 17 2018 - 05:07:46 EST


On 05/16/2018 10:32 PM, Alexandre Belloni wrote:
> On 09/05/2018 17:46:10+0200, Amelie Delaunay wrote:
>> struct stm32_rtc_registers {
>> @@ -86,6 +98,9 @@ struct stm32_rtc_registers {
>> u8 prer;
>> u8 alrmar;
>> u8 wpr;
>> + u8 sr;
>> + u8 scr;
>> + u16 verr;
>
> All those offsets should probably be u16 or u32...
>

OK, those offsets will be all u16 in v3, the maximum STM32 RTC register
offset value being 0x3FC.

>> + if (regs.verr != UNDEF_REG) {
>
> ...else, this is not working, as reported by kbuild
>

Yes, in v3, UNDEF_REG will be the maximum u16 value (0xFFFF) instead of ~0.

>> + u32 ver = readl_relaxed(rtc->base + regs.verr);
>> +
>> + dev_info(&pdev->dev, "registered rev:%d.%d\n",
>> + (ver >> STM32_RTC_VERR_MAJREV_SHIFT) & 0xF,
>> + (ver >> STM32_RTC_VERR_MINREV_SHIFT) & 0xF);
>> + }
>> +
>

Thanks,
Amelie