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mmc: renesas_sdhi: Set the SDBUF after reset

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For development purpose, renesas_sdhi_probe() could be called w/
dma_ops = NULL to force the usage of PIO mode. In this case the
renesas_sdhi_enable_dma() will not be called before transferring data.

If renesas_sdhi_enable_dma() is not called, renesas_sdhi_clk_enable()
call from renesas_sdhi_probe() will configure SDBUF by calling the
renesas_sdhi_sdbuf_width() function, but then SDBUF will be reset in
tmio_mmc_host_probe() when calling tmio_mmc_reset() though host->reset().
If SDBUF is zero the data transfer will not work in PIO mode for RZ/G3S.

To fix this call again the renesas_sdhi_sdbuf_width(host, 16) in
renesas_sdhi_reset(). The call of renesas_sdhi_sdbuf_width() was not
removed from renesas_sdhi_clk_enable() as the host->reset() is optional.

Co-developed-by: Hien Huynh <hien.huynh.px@renesas.com>
Signed-off-by: Hien Huynh <hien.huynh.px@renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240430093724.2692232-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Claudiu Beznea 2024-04-30 12:37:24 +03:00 committed by Ulf Hansson
parent ef65b1fdd1
commit 68dbe38ed7
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/host/renesas_sdhi_core.c
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@ -589,6 +589,9 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host, bool preserve)
sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
priv->needs_adjust_hs400 = false;
renesas_sdhi_set_clock(host, host->clk_cache);
/* Ensure default value for this driver. */
renesas_sdhi_sdbuf_width(host, 16);
} else if (priv->scc_ctl) {
renesas_sdhi_scc_reset(host, priv);
}