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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-12-02 21:24:31 -0600 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2023-12-04 15:46:02 +0100 |
| commit | 2fff0b5e1a6b9c577b4dd4958902c877159c856b (patch) | |
| tree | 334cb0a9f4d79f803392e36b2a8b381efdf0b045 | |
| parent | 5c584f175d32f9cc66c909f851cd905da58b39ea (diff) | |
| download | linux-2fff0b5e1a6b9c577b4dd4958902c877159c856b.tar.gz linux-2fff0b5e1a6b9c577b4dd4958902c877159c856b.tar.bz2 linux-2fff0b5e1a6b9c577b4dd4958902c877159c856b.zip | |
pinctrl: amd: Mask non-wake source pins with interrupt enabled at suspend
If a pin isn't marked as a wake source processing any interrupts is
just going to destroy battery life. The APU may wake up from a hardware
sleep state to process the interrupt but not return control to the OS.
Mask interrupt for all non-wake source pins at suspend. They'll be
re-enabled at resume.
Reported-and-tested-by: Marcus Aram <marcus+oss@oxar.nl>
Reported-and-tested-by: Mark Herbert <mark.herbert42@gmail.com>
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2812
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231203032431.30277-3-mario.limonciello@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/pinctrl/pinctrl-amd.c | 9 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-amd.h | 5 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c index fb58acb843d9..03ecb3d1aaf6 100644 --- a/drivers/pinctrl/pinctrl-amd.c +++ b/drivers/pinctrl/pinctrl-amd.c @@ -923,6 +923,15 @@ static int amd_gpio_suspend(struct device *dev) raw_spin_lock_irqsave(&gpio_dev->lock, flags); gpio_dev->saved_regs[i] = readl(gpio_dev->base + pin * 4) & ~PIN_IRQ_PENDING; + + /* mask any interrupts not intended to be a wake source */ + if (!(gpio_dev->saved_regs[i] & WAKE_SOURCE)) { + writel(gpio_dev->saved_regs[i] & ~BIT(INTERRUPT_MASK_OFF), + gpio_dev->base + pin * 4); + pm_pr_dbg("Disabling GPIO #%d interrupt for suspend.\n", + pin); + } + raw_spin_unlock_irqrestore(&gpio_dev->lock, flags); } diff --git a/drivers/pinctrl/pinctrl-amd.h b/drivers/pinctrl/pinctrl-amd.h index 34c5c3e71fb2..cf59089f2776 100644 --- a/drivers/pinctrl/pinctrl-amd.h +++ b/drivers/pinctrl/pinctrl-amd.h @@ -80,6 +80,11 @@ #define FUNCTION_MASK GENMASK(1, 0) #define FUNCTION_INVALID GENMASK(7, 0) +#define WAKE_SOURCE (BIT(WAKE_CNTRL_OFF_S0I3) | \ + BIT(WAKE_CNTRL_OFF_S3) | \ + BIT(WAKE_CNTRL_OFF_S4) | \ + BIT(WAKECNTRL_Z_OFF)) + struct amd_function { const char *name; const char * const groups[NSELECTS]; |