This patch make num_slots to 1 if pdata->num_slot is not
defined. Meanwhile, we need to make sure num_slots should
not larger that the supported slots
Signed-off-by: Shawn Lin <shawn....@rock-chips.com>
---
Changes in v2:
- remove default num-slots setting from dw_mci_parse_dt
drivers/mmc/host/dw_mmc.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 7128351..9696b77 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2864,12 +2864,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct
dw_mci *host)
return ERR_PTR(-ENOMEM);
/* find out number of slots supported */
- if (of_property_read_u32(dev->of_node, "num-slots",
- &pdata->num_slots)) {
- dev_info(dev,
- "num-slots property not found, assuming 1 slot is
available\n");
- pdata->num_slots = 1;
- }
+ of_property_read_u32(np, "num-slots", &pdata->num_slots);
/* get quirks */
for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++)
@@ -2949,12 +2944,6 @@ int dw_mci_probe(struct dw_mci *host)
}
}
- if (host->pdata->num_slots < 1) {
- dev_err(host->dev,
- "Platform data must supply num_slots.\n");
- return -ENODEV;
- }
-
host->biu_clk = devm_clk_get(host->dev, "biu");
if (IS_ERR(host->biu_clk)) {
dev_dbg(host->dev, "biu clock not available\n");
@@ -3111,7 +3100,15 @@ int dw_mci_probe(struct dw_mci *host)
if (host->pdata->num_slots)
host->num_slots = host->pdata->num_slots;
else
- host->num_slots = SDMMC_GET_SLOT_NUM(mci_readl(host, HCON));
+ 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,
--
2.3.7
