From: Mario Limonciello mario.limonciello@amd.com
[ Upstream commit 2fff0b5e1a6b9c577b4dd4958902c877159c856b ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/pinctrl-amd.c | 9 +++++++++ drivers/pinctrl/pinctrl-amd.h | 5 +++++ 2 files changed, 14 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c index 74241b2ff21e3..86034c457c043 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 34c5c3e71fb26..cf59089f27763 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];