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pinctrl: rockchip: Update get_gpio_mux() ops

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Add a way to get_gpio_mux() based on the pinctrl pin offset, use -1 as
banknum to use the pinctrl pin offset mode instead of bank pin offset.

This mode will be used by the gpio driver to ensure a pin used by gpio
request() and get_function() ops always refer to the same pinctrl pin.

Also add verify_config() of banknum and index to avoid an out of range
access of the pin_banks array, i.e. with gpio6 on rk3066a.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Jonas Karlman
2024-08-02 22:56:45 +00:00
committed by Ondrej Jirman
parent f1515d498e
commit f6c146e6eb
1 changed files with 21 additions and 1 deletions
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22
drivers/pinctrl/rockchip/pinctrl-rockchip-core.c
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@@ -193,10 +193,30 @@ static struct rockchip_pin_bank *rockchip_pin_to_bank(struct udevice *dev,
return NULL;
}
static int rockchip_pin_to_mux(struct udevice *dev, unsigned int pin)
{
struct rockchip_pin_bank *bank;
bank = rockchip_pin_to_bank(dev, pin);
if (!bank)
return -EINVAL;
return rockchip_get_mux(bank, pin - bank->pin_base);
}
static int rockchip_pinctrl_get_gpio_mux(struct udevice *dev, int banknum,
int index)
{ struct rockchip_pinctrl_priv *priv = dev_get_priv(dev);
{
struct rockchip_pinctrl_priv *priv = dev_get_priv(dev);
struct rockchip_pin_ctrl *ctrl = priv->ctrl;
int ret;
if (banknum == -1)
return rockchip_pin_to_mux(dev, index);
ret = rockchip_verify_config(dev, banknum, index);
if (ret)
return ret;
return rockchip_get_mux(&ctrl->pin_banks[banknum], index);
}