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Diffstat (limited to 'kernel/drivers/pinctrl')
-rw-r--r--kernel/drivers/pinctrl/pinctrl-at91.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/drivers/pinctrl/pinctrl-at91.c b/kernel/drivers/pinctrl/pinctrl-at91.c
index 2f797cb7e..774781450 100644
--- a/kernel/drivers/pinctrl/pinctrl-at91.c
+++ b/kernel/drivers/pinctrl/pinctrl-at91.c
@@ -320,6 +320,9 @@ static const struct pinctrl_ops at91_pctrl_ops = {
static void __iomem *pin_to_controller(struct at91_pinctrl *info,
unsigned int bank)
{
+ if (!gpio_chips[bank])
+ return NULL;
+
return gpio_chips[bank]->regbase;
}
@@ -729,6 +732,10 @@ static int at91_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
pin = &pins_conf[i];
at91_pin_dbg(info->dev, pin);
pio = pin_to_controller(info, pin->bank);
+
+ if (!pio)
+ continue;
+
mask = pin_to_mask(pin->pin);
at91_mux_disable_interrupt(pio, mask);
switch (pin->mux) {
@@ -848,6 +855,10 @@ static int at91_pinconf_get(struct pinctrl_dev *pctldev,
*config = 0;
dev_dbg(info->dev, "%s:%d, pin_id=%d", __func__, __LINE__, pin_id);
pio = pin_to_controller(info, pin_to_bank(pin_id));
+
+ if (!pio)
+ return -EINVAL;
+
pin = pin_id % MAX_NB_GPIO_PER_BANK;
if (at91_mux_get_multidrive(pio, pin))
@@ -889,6 +900,10 @@ static int at91_pinconf_set(struct pinctrl_dev *pctldev,
"%s:%d, pin_id=%d, config=0x%lx",
__func__, __LINE__, pin_id, config);
pio = pin_to_controller(info, pin_to_bank(pin_id));
+
+ if (!pio)
+ return -EINVAL;
+
pin = pin_id % MAX_NB_GPIO_PER_BANK;
mask = pin_to_mask(pin);