On 17/05/2023 10:28, Alexandre Mergnat wrote:
> Before the patch [1], the clock probe was done directly in the
> clk-mt8365 driver. In this probe function, the array which stores the
> data clocks is sized using the higher defined numbers (*_NR_CLOCK) in
> the clock lists [2]. Currently, with the patch [1], the specific
> clk-mt8365 probe function is replaced by the mtk generic one [3], which
> size the clock data array by adding all the clock descriptor array size
> provided by the clk-mt8365 driver.
>
> Actually, all clock indexes come from the header file [2], that mean, if
> there are more clock (then more index) in the header file [2] than the
> number of clock declared in the clock descriptor arrays (which is the
> case currently), the clock data array will be undersized and then the
> generic probe function will overflow when it will try to write in
> "clk_data[CLK_INDEX]". Actually, instead of crashing at boot, the probe
> function returns an error in the log which looks like:
> "of_clk_hw_onecell_get: invalid index 135", then this clock isn't
> enabled.
Please use subject prefixes matching the subsystem. You can get them for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching.
This is huge ABI break and I don't understand why it is needed. Entire
description above did not explain me that.
>
> The simplest way to fix the regression is to remove from the header file
> [2] the unused clocks.
??? The simples is to revert the patch, so you won't break the ABI.
>
> [1]: Commit ffe91cb28f6a ("clk: mediatek: mt8365: Convert to
> mtk_clk_simple_{probe,remove}()")
> [2]: include/dt-bindings/clock/mediatek,mt8365-clk.h
> [3]: drivers/clk/mediatek/clk-mtk.c
>
> Fixes: ffe91cb28f6a ("clk: mediatek: mt8365: Convert to mtk_clk_simple_{probe,remove}()")
>
> Signed-off-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
> ---
> include/dt-bindings/clock/mediatek,mt8365-clk.h | 361 ++++++++++++------------
> 1 file changed, 177 insertions(+), 184 deletions(-)
>
> diff --git a/include/dt-bindings/clock/mediatek,mt8365-clk.h b/include/dt-bindings/clock/mediatek,mt8365-clk.h
> index f9aff1775810..fd59c8bdeb24 100644
> --- a/include/dt-bindings/clock/mediatek,mt8365-clk.h
> +++ b/include/dt-bindings/clock/mediatek,mt8365-clk.h
> @@ -7,147 +7,142 @@
> #define _DT_BINDINGS_CLK_MT8365_H
>
> /* TOPCKGEN */
> -#define CLK_TOP_CLK_NULL 0> -#define CLK_TOP_I2S0_BCK 1
...
> +#define CLK_TOP_I2S0_BCK 0
Why? This is really broken. You can remove the defines, but re-shuffling
everything?!?
Best regards,
Krzysztof
