diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-02-06 16:15:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-22 12:50:32 +0100 |
| commit | 1bcb431237f14a37c1d0cd371728a0a18ab0e8ce (patch) | |
| tree | a81d4c15c17f75b4df64bf40cdac22c81a4a6ca3 | |
| parent | 2b763f7de108cb1a5ad5ed08e617d677341947cb (diff) | |
pinctrl: intel: Restore the pins that used to be in Direct IRQ mode
[ Upstream commit a8520be3ffef3d25b53bf171a7ebe17ee0154175 ]
If the firmware mangled the register contents too much,
check the saved value for the Direct IRQ mode. If it
matches, we will restore the pin state.
Reported-by: Jim Minter <jimminter@microsoft.com>
Fixes: 6989ea4881c8 ("pinctrl: intel: Save and restore pins in "direct IRQ" mode")
Tested-by: Jim Minter <jimminter@microsoft.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20230206141558.20916-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-intel.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index e0cb76f7e540..32c6326337f7 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -1510,6 +1510,12 @@ int intel_pinctrl_probe_by_uid(struct platform_device *pdev) EXPORT_SYMBOL_GPL(intel_pinctrl_probe_by_uid); #ifdef CONFIG_PM_SLEEP +static bool __intel_gpio_is_direct_irq(u32 value) +{ + return (value & PADCFG0_GPIROUTIOXAPIC) && (value & PADCFG0_GPIOTXDIS) && + (__intel_gpio_get_gpio_mode(value) == PADCFG0_PMODE_GPIO); +} + static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned int pin) { const struct pin_desc *pd = pin_desc_get(pctrl->pctldev, pin); @@ -1543,8 +1549,7 @@ static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned int * See https://bugzilla.kernel.org/show_bug.cgi?id=214749. */ value = readl(intel_get_padcfg(pctrl, pin, PADCFG0)); - if ((value & PADCFG0_GPIROUTIOXAPIC) && (value & PADCFG0_GPIOTXDIS) && - (__intel_gpio_get_gpio_mode(value) == PADCFG0_PMODE_GPIO)) + if (__intel_gpio_is_direct_irq(value)) return true; return false; @@ -1656,7 +1661,12 @@ int intel_pinctrl_resume_noirq(struct device *dev) void __iomem *padcfg; u32 val; - if (!intel_pinctrl_should_save(pctrl, desc->number)) + if (!(intel_pinctrl_should_save(pctrl, desc->number) || + /* + * If the firmware mangled the register contents too much, + * check the saved value for the Direct IRQ mode. + */ + __intel_gpio_is_direct_irq(pads[i].padcfg0))) continue; padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG0); |