[PATCH 1/3] clk: mediatek: clk-mtk: Grab iomem pointer for divider clocks

[Stephen Boyd]

Quoting AngeloGioacchino Del Regno (2023-06-15 05:20:49)
> In the rare case in which one of the clock drivers has divider clocks
> but not composite clocks, mtk_clk_simple_probe() would not io(re)map,
> hence passing a NULL pointer to mtk_clk_register_dividers().
> 
> To fix this issue, extend the `if` conditional to also check if any
> divider clocks are present. While at it, also make sure the iomem
> pointer is NULL if no composite/divider clocks are declared, as we
> are checking for that when iounmapping it in the error path.
> 
> This hasn't been seen on any MediaTek clock driver as the current ones
> always declare composite clocks along with divider clocks, but this is
> still an important fix for a future potential KP.
> 
> Fixes: 1fe074b1f112 ("clk: mediatek: Add divider clocks to mtk_clk_simple_{probe,remove}()")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> ---

Applied to clk-next