As a preparation for merging the socfpga gen5 devicetree files from Linux, this patch makes the dwapb gpio driver work correctly without the 'bank-name' property on the gpio-controller nodes.
This property is not present in the Linux drivers and thus is not present in the Linux devicetrees. It is only used to access pins via bank name.
This fallback is necessary since without it, the driver will return an error code which will lead to an error in U-Boot startup.
The bank names will still be added to the default board device trees in follow-up patch, but other boards using this driver and not including the bank name should also work with the socfpga.dtsi without adding the bank-name property.
Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com ---
Changes in v2: None
drivers/gpio/dwapb_gpio.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c index 68836a7902..e55fb4ac73 100644 --- a/drivers/gpio/dwapb_gpio.c +++ b/drivers/gpio/dwapb_gpio.c @@ -180,6 +180,13 @@ static int gpio_dwapb_bind(struct udevice *dev) plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0); plat->name = fdt_stringlist_get(blob, node, "bank-name", 0, NULL); + if (!plat->name) { + /* + * Fall back to node name. This means accessing pins + * via bank name won't work. + */ + plat->name = fdt_get_name(blob, node, NULL); + }
ret = device_bind(dev, dev->driver, plat->name, plat, -1, &subdev);