This is a note to let you know that I've just added the patch titled pinctrl: intel: Restore the pins that used to be in Direct IRQ mode to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pinctrl-intel-restore-the-pins-that-used-to-be-in-di.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit ceebf8e532b719ee8d89224d0ae0c98254262c38 Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Date: Mon Feb 6 16:15:59 2023 +0200 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@xxxxxxxxxxxxx> Fixes: 6989ea4881c8 ("pinctrl: intel: Save and restore pins in "direct IRQ" mode") Tested-by: Jim Minter <jimminter@xxxxxxxxxxxxx> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230206141558.20916-1-andriy.shevchenko@xxxxxxxxxxxxxxx Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index 047a8374b4fdc..954a412267402 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -1676,6 +1676,12 @@ const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_ EXPORT_SYMBOL_GPL(intel_pinctrl_get_soc_data); #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); @@ -1709,8 +1715,7 @@ 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; @@ -1840,7 +1845,12 @@ int intel_pinctrl_resume_noirq(struct device *dev) for (i = 0; i < pctrl->soc->npins; i++) { const struct pinctrl_pin_desc *desc = &pctrl->soc->pins[i]; - 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; intel_restore_padcfg(pctrl, desc->number, PADCFG0, pads[i].padcfg0);