Re: [PATCH v4 04/10] coresight: Appropriately disable programming clocks

On Mon, Jul 21, 2025 at 10:15:22AM +0100, Suzuki Kuruppassery Poulose wrote:

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diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 4ac65c68bbf44b98db22c3dad2d83a224ce5278e..dd2b4cc7a2b70cf060a3207548fe80e3824c489f 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -480,26 +480,16 @@ static inline bool is_coresight_device(void __iomem *base)

• Returns:
• clk - Clock is found and enabled

• • NULL - clock is not found

This is still valid, right ?

No. Since this patch uses devm_clk_get_enabled() to get a clock, if the pclk is not found, it returns -ENOENT (see of_parse_clkspec()).

Only the optional clock APIs (e.g., devm_clk_get_optional_enabled()) return a NULL pointer instead of -ENOENT when the clock is not found.

Thanks, Leo