On 16.12.2019 18:24, Lee Jones wrote:
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>
> On Fri, 13 Dec 2019, Claudiu Beznea wrote:
>
>> For HLCDC timing engine configurations bit ATMEL_HLCDC_SIP of
>> ATMEL_HLCDC_SR needs to be polled before applying new config. In case of
>> timeout there is no indicator about this, so, return in case of timeout
>> and also print a message about this.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea@xxxxxxxxxxxxx>
>> ---
>> drivers/mfd/atmel-hlcdc.c | 15 +++++++++++----
>> 1 file changed, 11 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c
>> index 92bfcaa62ace..a1e46c87b956 100644
>> --- a/drivers/mfd/atmel-hlcdc.c
>> +++ b/drivers/mfd/atmel-hlcdc.c
>> @@ -40,10 +40,17 @@ static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
>>
>> if (reg <= ATMEL_HLCDC_DIS) {
>> u32 status;
>> -
>> - readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
>> - status, !(status & ATMEL_HLCDC_SIP),
>> - 1, 100);
>> + int ret;
>> +
>> + ret = readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
>> + status,
>> + !(status & ATMEL_HLCDC_SIP),
>> + 1, 100);
>> + if (ret) {
>> + dev_err(hregmap->dev,
>> + "Timeout waiting for ATMEL_HLCDC_SIP\n");
>
> Nit: Just in case you have to rework this, placing register names in
> the kernel log isn't usually helpful. Can you swap it out for a more
> user friendly message?
Sure! I'll do a v3 for it.
Thank you,
Claudiu Beznea
>
> "Timed out waiting for ..."
>
> ... X status
> ... Y to update
> ... setting Z configuration
>
> Etc.
>
>> + return ret;
>> + }
>> }
>>
>> writel(val, hregmap->regs + reg);
>
> --
> Lee Jones [李琼斯]
> Linaro Services Technical Lead
> Linaro.org │ Open source software for ARM SoCs
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>
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