mmc: dw_mmc: simplify optional reset handling
As of commit bb475230b8e5 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.
This allows to return errors from devm_reset_control_get_optional and to
call reset_control_(de)assert unconditionally.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20210305090724.18832-1-p.zabel@pengutronix.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 3974525..d333130 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3093,10 +3093,8 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
/* find reset controller when exist */
pdata->rstc = devm_reset_control_get_optional_exclusive(dev, "reset");
- if (IS_ERR(pdata->rstc)) {
- if (PTR_ERR(pdata->rstc) == -EPROBE_DEFER)
- return ERR_PTR(-EPROBE_DEFER);
- }
+ if (IS_ERR(pdata->rstc))
+ return ERR_CAST(pdata->rstc);
if (device_property_read_u32(dev, "fifo-depth", &pdata->fifo_depth))
dev_info(dev,
@@ -3202,7 +3200,7 @@ int dw_mci_probe(struct dw_mci *host)
goto err_clk_ciu;
}
- if (!IS_ERR(host->pdata->rstc)) {
+ if (host->pdata->rstc) {
reset_control_assert(host->pdata->rstc);
usleep_range(10, 50);
reset_control_deassert(host->pdata->rstc);
@@ -3342,8 +3340,7 @@ int dw_mci_probe(struct dw_mci *host)
if (host->use_dma && host->dma_ops->exit)
host->dma_ops->exit(host);
- if (!IS_ERR(host->pdata->rstc))
- reset_control_assert(host->pdata->rstc);
+ reset_control_assert(host->pdata->rstc);
err_clk_ciu:
clk_disable_unprepare(host->ciu_clk);
@@ -3371,8 +3368,7 @@ void dw_mci_remove(struct dw_mci *host)
if (host->use_dma && host->dma_ops->exit)
host->dma_ops->exit(host);
- if (!IS_ERR(host->pdata->rstc))
- reset_control_assert(host->pdata->rstc);
+ reset_control_assert(host->pdata->rstc);
clk_disable_unprepare(host->ciu_clk);
clk_disable_unprepare(host->biu_clk);