The patch is inspired by more recent versions of the Linux driver. Replacing the default value 0xffffffff of the function mask with 0 is certainly more conservative in case the "pinctrl-single,function-mask" DT property is missing.
Signed-off-by: Dario Binacchi dariobin@libero.it Reviewed-by: Simon Glass sjg@chromium.org
---
Changes in v3: - Added Simon Glass review tag.
drivers/pinctrl/pinctrl-single.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index 5ade108875..630a6c08b8 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -79,6 +79,10 @@ static int single_configure_pins(struct udevice *dev, phys_addr_t reg; u32 offset, val;
+ /* If function mask is null, needn't enable it. */ + if (!pdata->mask) + return 0; + for (n = 0; n < count; n++, pins++) { offset = fdt32_to_cpu(pins->reg); if (offset < 0 || offset > pdata->offset) { @@ -207,8 +211,12 @@ static int single_of_to_plat(struct udevice *dev) } pdata->base = addr;
- pdata->mask = dev_read_u32_default(dev, "pinctrl-single,function-mask", - 0xffffffff); + ret = dev_read_u32(dev, "pinctrl-single,function-mask", &pdata->mask); + if (ret) { + pdata->mask = 0; + dev_warn(dev, "missing function register mask\n"); + } + pdata->bits_per_mux = dev_read_bool(dev, "pinctrl-single,bit-per-mux");
return 0;