pinctrl: amd: fix incorrect way to disable debounce filter

commit 06abe8291bc31839950f7d0362d9979edc88a666 upstream.

The correct way to disable debounce filter is to clear bit 5 and 6
of the register.

Cc: stable@vger.kerne.org
Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/linux-gpio/df2c008b-e7b5-4fdd-42ea-4d1c62b52139@redhat.com/
Link: https://lore.kernel.org/r/20201105231912.69527-2-coiby.xu@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
index 9a2b031c8164eb708bed581dc48d484ca6bef3fa..82fac6261efa1eaee1d4f06b73507defc91d25e1 100644 (file)
--- a/drivers/pinctrl/pinctrl-amd.c
+++ b/drivers/pinctrl/pinctrl-amd.c
@@ -150,14 +150,14 @@ static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
                        pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
                        pin_reg |= BIT(DB_TMR_LARGE_OFF);
                } else {
-                       pin_reg &= ~DB_CNTRl_MASK;
+                       pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
                        ret = -EINVAL;
                }
        } else {
                pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
                pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
                pin_reg &= ~DB_TMR_OUT_MASK;
-               pin_reg &= ~DB_CNTRl_MASK;
+               pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
        }
        writel(pin_reg, gpio_dev->base + offset * 4);
        spin_unlock_irqrestore(&gpio_dev->lock, flags);