diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-intel.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index 19b73de2f238..c4274542a5a0 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -160,8 +160,7 @@ static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned pin) return !(readl(padown) & PADOWN_MASK(padno)); } -static bool intel_pad_reserved_for_acpi(struct intel_pinctrl *pctrl, - unsigned pin) +static bool intel_pad_acpi_mode(struct intel_pinctrl *pctrl, unsigned pin) { const struct intel_community *community; unsigned padno, gpp, offset; @@ -217,7 +216,6 @@ static bool intel_pad_locked(struct intel_pinctrl *pctrl, unsigned pin) static bool intel_pad_usable(struct intel_pinctrl *pctrl, unsigned pin) { return intel_pad_owned_by_host(pctrl, pin) && - !intel_pad_reserved_for_acpi(pctrl, pin) && !intel_pad_locked(pctrl, pin); } @@ -270,7 +268,7 @@ static void intel_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, seq_printf(s, "0x%08x 0x%08x", cfg0, cfg1); locked = intel_pad_locked(pctrl, pin); - acpi = intel_pad_reserved_for_acpi(pctrl, pin); + acpi = intel_pad_acpi_mode(pctrl, pin); if (locked || acpi) { seq_puts(s, " ["); @@ -737,6 +735,16 @@ static int intel_gpio_irq_type(struct irq_data *d, unsigned type) if (!reg) return -EINVAL; + /* + * If the pin is in ACPI mode it is still usable as a GPIO but it + * cannot be used as IRQ because GPI_IS status bit will not be + * updated by the host controller hardware. + */ + if (intel_pad_acpi_mode(pctrl, pin)) { + dev_warn(pctrl->dev, "pin %u cannot be used as IRQ\n", pin); + return -EPERM; + } + spin_lock_irqsave(&pctrl->lock, flags); value = readl(reg); |