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mmc: dw_mmc: fix num_slots setting

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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.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shawn Lin 2016-02-02 14:11:25 +08:00 committed by Ulf Hansson
parent 345efee354
commit 8a629d26f0
1 changed files with 10 additions and 13 deletions
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23
drivers/mmc/host/dw_mmc.c
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@ -2879,12 +2879,7 @@ 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);
if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth))
dev_info(dev,
@ -2960,12 +2955,6 @@ 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");
@ -3124,7 +3113,15 @@ 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,