Re: [PATCH v25 04/11] mmc: renesas_sdhi: Add max_divider field to support SoC-specific clock ranges

[Wolfram Sang]

On Wed, Oct 28, 2026 at 12:51:21PM +0000, Biju Das wrote:
> From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> 
> RZ/G3L supports a wider clock divider range than the hardcoded 512
> used by existing SoCs. Add a max_divider field to
> renesas_sdhi_of_data and tmio_mmc_data, and use it in
> renesas_sdhi_clk_enable(), renesas_sdhi_clk_update(), and
> renesas_sdhi_set_clock() instead of the fixed value.
> 
> While at it, check the return value of clk_round_rate() in
> renesas_sdhi_clk_enable(). A negative error code was previously
> divided and clamped into f_min; now the error is propagated and the
> clk_cd clock is disabled again.
> 
> Default to SDHI_MAX_DIVIDER_DEFAULT (512) at probe time when
> platform data doesn't set it. This paves the way for RZ/G3L's extended
> divider support.
> 
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>

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