[PATCH 3/6] drivers/thermal/exynos: check IS_ERR(data->clk) consistently

[Mateusz Majewski]

> Also, if it's only optional for Exynos850 (and not optional for other
> chips), maybe it would be a good idea to use *_optional_* API only for
> Exynos850 case, so that the driver's behavior for those chips stays
> unchanged.

Probably should just set the clock to NULL in case of 850 then?

> Btw, from the downstream kernel code [1] I can see that the only TMU
> clock present in Exynos850 is
> GOUT_BLK_PERI_UID_BUSIF_TMU_IPCLKPORT_PCLK (which I was able to
> confirm in TRM). But it's not enabled in clk-exynos850.c driver right
> now. Do you want me by chance to send the patch adding it?

Would be very grateful :) If nothing else, it would be useful for
testing.