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mmc: mtk-sd: Take action for no-sdio device-tree parameter 

This driver was unconditionally enabling support for SDIO mode,
but we do have a generic "no-sdio" DT parameter that sets caps2
MMC_CAP2_NO_SDIO.

Modify the HW initialization sequence to enable SDIO support only
if it hasn't been explicitly disabled in device-tree.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20211216125748.179602-3-angelogioacchino.delregno@collabora.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
AngeloGioacchino Del Regno 2021-12-16 13:57:46 +01:00 committed by Ulf Hansson
parent 4fe5431849
commit 83b2721715
1 changed files with 12 additions and 7 deletions
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19
drivers/mmc/host/mtk-sd.c
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@ -1638,6 +1638,7 @@ static void msdc_init_hw(struct msdc_host *host)
{
u32 val;
u32 tune_reg = host->dev_comp->pad_tune_reg;
struct mmc_host *mmc = mmc_from_priv(host);
if (host->reset) {
reset_control_assert(host->reset);
@ -1743,14 +1744,18 @@ static void msdc_init_hw(struct msdc_host *host)
MSDC_PAD_TUNE_RXDLYSEL);
}
/* Configure to enable SDIO mode.
* it's must otherwise sdio cmd5 failed
*/
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
if (mmc->caps2 & MMC_CAP2_NO_SDIO) {
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
sdr_clr_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
} else {
/* Configure to enable SDIO mode, otherwise SDIO CMD5 fails */
sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
/* Config SDIO device detect interrupt function */
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
/* Config SDIO device detect interrupt function */
sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
}
/* Configure to default data timeout */
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);