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SubjectRe: [PATCH] spi: microchip-core: fix passing zero to PTR_ERR warning
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On 15/06/2022 13:49, Mark Brown wrote:
> On Wed, Jun 15, 2022 at 12:42:27PM +0000, Conor.Dooley@microchip.com wrote:
>> On 15/06/2022 13:37, Mark Brown wrote:
>
>>>> But if spi->clk is NULL, this will return 0 from the probe
>>>> rather than returning an error?
>>>> If that's not what you meant, lmk
>
>>> Oh, hang on - what error conditions can clk_get() return 0 in? The
>>> documentation doesn't mention any...
>
>> If !CONFIG_HAVE_CLK, (without which it won't boot on the coreplex)
>> but I don't think I can be sure that CONFIG_HAVE_CLK will /always/
>> be enabled for other uses of the FPGA.
>
> That's not an error, that's returning NULL as a dummy clock. The
> expectation is that the driver will proceed as though it has a clock.

Ahh, cool. I guess I'll just drop the null check entirely so & guard
against a div zero when I actually go to use the clock.
Thanks!
Conor
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