This reverts commit d30a8f7bdf6498e47bd3a6f31e5028f239deb208. The Mellanox BlueField SoC requires multiple slot dw-mmc support.
Signed-off-by: Liming Sun <[email protected]> --- drivers/mmc/host/dw_mmc.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index ef36e05..150cd05 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -3018,8 +3018,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) } /* find out number of slots supported */ - if (!device_property_read_u32(dev, "num-slots", &pdata->num_slots)) - dev_info(dev, "'num-slots' was deprecated.\n"); + device_property_read_u32(dev, "num-slots", &pdata->num_slots); if (device_property_read_u32(dev, "fifo-depth", &pdata->fifo_depth)) dev_info(dev, @@ -3252,12 +3251,18 @@ int dw_mci_probe(struct dw_mci *host) if (ret) goto err_dmaunmap; - /* - * Even though dwmmc IP is provided the multiple slots, - * there is no use case in mmc subsystem. - * dwmmc host controller needs to initialize the one slot per an IP. - */ - host->num_slots = 1; + if (host->pdata->num_slots) + host->num_slots = host->pdata->num_slots; + else + host->num_slots = 1; + + if (host->num_slots < 1 || + host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) { + dev_err(host->dev, + "Platform data must supply correct num_slots.\n"); + ret = -ENODEV; + goto err_clk_ciu; + } /* * Enable interrupts for command done, data over, data empty, -- 1.8.3.1
