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gpio: gpio-rockchip: parse gpio-ranges for bank id 

Use the new devicetree property of gpio-ranges to determine the GPIO
bank ID. Preserve the "old" way of doing things too, so that boards
can be migrated and tested gradually (I only have a 3566 and 3326 to
test).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Chris Morgan 2023-02-13 16:27:34 -06:00 committed by Kever Yang
parent 5aedc8bf0f
commit 904b8700f8
1 changed files with 17 additions and 3 deletions
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20
drivers/gpio/rk_gpio.c
View File

@ -142,6 +142,7 @@ static int rockchip_gpio_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct rockchip_gpio_priv *priv = dev_get_priv(dev);
struct ofnode_phandle_args args;
char *end;
int ret;
@ -150,9 +151,22 @@ static int rockchip_gpio_probe(struct udevice *dev)
if (ret)
return ret;
uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK;
end = strrchr(dev->name, '@');
priv->bank = trailing_strtoln(dev->name, end);
/*
* If "gpio-ranges" is present in the devicetree use it to parse
* the GPIO bank ID, otherwise use the legacy method.
*/
ret = ofnode_parse_phandle_with_args(dev_ofnode(dev),
"gpio-ranges", NULL, 3,
0, &args);
if (!ret || ret != -ENOENT) {
uc_priv->gpio_count = args.args[2];
priv->bank = args.args[1] / args.args[2];
} else {
uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK;
end = strrchr(dev->name, '@');
priv->bank = trailing_strtoln(dev->name, end);
}
priv->name[0] = 'A' + priv->bank;
uc_priv->bank_name = priv->name;