Looks like there was some code loss when the driver came from an earlier kernel
series. Without this, my MT7621 board starts its GPIO offsets at 416 (why that
number, I don't know):
--- a/drivers/gpio/gpio-mt7621.c 2022-10-18 15:03:42.596454871 -0400
+++ b/drivers/gpio/gpio-mt7621.c 2022-10-18 13:51:23.628305673 -0400
@@ -234,6 +234,7 @@
return ret;
}
+ rg->chip.base = rg->bank * MTK_BANK_WIDTH;
rg->chip.of_gpio_n_cells = 2;
rg->chip.of_xlate = mediatek_gpio_xlate;
rg->chip.label = devm_kasprintf(dev, GFP_KERNEL, "%s-bank%d",
I'm using 5.10 in the current OpenWrt 22.03.
Before
# ls -l /sys/class/gpio/gpiochip4*
lrwxrwxrwx 1 root root 0 Jan 1 1970
/sys/class/gpio/gpiochip416 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio6
lrwxrwxrwx 1 root root 0 Jan 1 1970
/sys/class/gpio/gpiochip448 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio8
lrwxrwxrwx 1 root root 0 Jan 1 1970
/sys/class/gpio/gpiochip480 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio0
After:
# ls -l /sys/class/gpio/
--w------- 1 root root 4096 Jan 1 1970 export
lrwxrwxrwx 1 root root 0 Jan 1 1970 gpiochip0 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio/gpiochip0
lrwxrwxrwx 1 root root 0 Jan 1 1970 gpiochip32 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio/gpiochip32
lrwxrwxrwx 1 root root 0 Jan 1 1970 gpiochip64 ->
../../devices/platform/1e000000.palmbus/1e000600.gpio/gpio/gpiochip64
--w------- 1 root root 4096 Jan 1 1970 unexport
Which is consistent with what I had in 4.14 series.
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