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Subject[PATCH 3/5] mmc: mtk-sd: Take action for no-sdio device-tree parameter
Date
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>
---
drivers/mmc/host/mtk-sd.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index d067636434ca..f08695e52601 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -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);
--
2.33.1
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