Legacy gpio based bus setup is failed when the bus pins are listed with the
property 'pinctrl-0' and 'pinctrl-names', instead of 'gpios'. The default
pinctrls are handled by device core before probe, no need to configure the
pins again in a device driver.
[ 1.190000] Synopsys Designware Multimedia Card Interface Driver
[ 1.195000] dwmmc_exynos 12550000.mshc: Using PIO mode.
[ 1.200000] dwmmc_exynos 12550000.mshc: DW MMC controller at irq 109, 32 bit
host data width, 128 deep fifo
[ 1.210000] dwmmc_exynos 12550000.mshc: invalid gpio: -2
[ 1.215000] dwmmc_exynos: probe of 12550000.mshc failed with error -22
Cc: Thomas Abraham <thomas...@samsung.com>
Cc: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Dongjin Kim <tobet...@gmail.com>
---
drivers/mmc/host/dw_mmc-exynos.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index aafd485..f568c32 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -156,12 +156,19 @@ static int dw_mci_exynos_setup_bus(struct dw_mci *host,
struct device_node *slot_np, u8 bus_width)
{
int idx, gpio, ret;
+ int nr_pins = NUM_PINS(bus_width);
if (!slot_np)
return -EINVAL;
+#if defined(CONFIG_PINCTRL)
+ /* Default pinctrl is used */
+ if (!IS_ERR(host->dev->pins->default_state))
+ nr_pins = 0;
+#endif
+
/* cmd + clock + bus-width pins */
- for (idx = 0; idx < NUM_PINS(bus_width); idx++) {
+ for (idx = 0; idx < nr_pins; idx++) {
gpio = of_get_gpio(slot_np, idx);
if (!gpio_is_valid(gpio)) {
dev_err(host->dev, "invalid gpio: %d\n", gpio);
--
1.7.10.4
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