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pinctrl: amd: Revert "pinctrl: amd: disable and mask interrupts on probe" 

commit 4e5a04be88 ("pinctrl: amd: disable and mask interrupts on probe")
was well intentioned to mask a firmware issue on a surface laptop, but it
has a few problems:
1. It had a bug in the loop handling for iteration 63 that lead to other
   problems with GPIO0 handling.
2. It disables interrupts that are used internally by the SOC but masked
   by default.
3. It masked a real firmware problem in some chromebooks that should have
   been caught during development but wasn't.

There has been a lot of other development around s2idle; particularly
around handling of the spurious wakeups.  If there is still a problem on
the original reported surface laptop it should be avoided by adding a quirk
to gpiolib-acpi for that system instead.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20230421120625.3366-5-mario.limonciello@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Mario Limonciello 2023-04-21 07:06:24 -05:00 committed by Linus Walleij
parent 0cf9e48ff2
commit 65f6c7c91c
1 changed files with 0 additions and 31 deletions
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31
drivers/pinctrl/pinctrl-amd.c
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@ -877,34 +877,6 @@ static const struct pinconf_ops amd_pinconf_ops = {
.pin_config_group_set = amd_pinconf_group_set,
};
static void amd_gpio_irq_init(struct amd_gpio *gpio_dev)
{
struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
unsigned long flags;
u32 pin_reg, mask;
int i;
mask = BIT(WAKE_CNTRL_OFF_S0I3) | BIT(WAKE_CNTRL_OFF_S3) |
BIT(INTERRUPT_MASK_OFF) | BIT(INTERRUPT_ENABLE_OFF) |
BIT(WAKE_CNTRL_OFF_S4);
for (i = 0; i < desc->npins; i++) {
int pin = desc->pins[i].number;
const struct pin_desc *pd = pin_desc_get(gpio_dev->pctrl, pin);
if (!pd)
continue;
raw_spin_lock_irqsave(&gpio_dev->lock, flags);
pin_reg = readl(gpio_dev->base + pin * 4);
pin_reg &= ~mask;
writel(pin_reg, gpio_dev->base + pin * 4);
raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
}
}
#ifdef CONFIG_PM_SLEEP
static bool amd_gpio_should_save(struct amd_gpio *gpio_dev, unsigned int pin)
{
@ -1142,9 +1114,6 @@ static int amd_gpio_probe(struct platform_device *pdev)
return PTR_ERR(gpio_dev->pctrl);
}
/* Disable and mask interrupts */
amd_gpio_irq_init(gpio_dev);
girq = &gpio_dev->gc.irq;
gpio_irq_chip_set_chip(girq, &amd_gpio_irqchip);
/* This will let us handle the parent IRQ in the driver */