From: Tony Lindgren tony@atomide.com
[ Upstream commit 7ffa08169849be898eed6f3694aab8c425497749 ]
This reverts commit 579ced8fdb00b8e94304a83e3cc419f6f8eab08e.
Turns out I was overly optimistic about cpu_pm blocking idle being a solution for handling edge interrupts. While it helps in preventing entering idle states that potentially lose context, we can still get an edge interrupt triggering while entering idle. So we need to also add back the workaround for seeing if there are any pending edge interrupts when waking up.
Signed-off-by: Tony Lindgren tony@atomide.com Cc: Aaro Koskinen aaro.koskinen@iki.fi Cc: Grygorii Strashko grygorii.strashko@ti.com Cc: Keerthy j-keerthy@ti.com Cc: Ladislav Michl ladis@linux-mips.org Cc: Peter Ujfalusi peter.ujfalusi@ti.com Cc: Russell King rmk+kernel@armlinux.org.uk Cc: Tero Kristo t-kristo@ti.com Link: https://lore.kernel.org/r/20201028060556.56038-1-tony@atomide.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpio/gpio-omap.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 0ea640fb636cf..3b87989e27640 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -1114,13 +1114,23 @@ static void omap_gpio_idle(struct gpio_bank *bank, bool may_lose_context) { struct device *dev = bank->chip.parent; void __iomem *base = bank->base; - u32 nowake; + u32 mask, nowake;
bank->saved_datain = readl_relaxed(base + bank->regs->datain);
if (!bank->enabled_non_wakeup_gpios) goto update_gpio_context_count;
+ /* Check for pending EDGE_FALLING, ignore EDGE_BOTH */ + mask = bank->enabled_non_wakeup_gpios & bank->context.fallingdetect; + mask &= ~bank->context.risingdetect; + bank->saved_datain |= mask; + + /* Check for pending EDGE_RISING, ignore EDGE_BOTH */ + mask = bank->enabled_non_wakeup_gpios & bank->context.risingdetect; + mask &= ~bank->context.fallingdetect; + bank->saved_datain &= ~mask; + if (!may_lose_context) goto update_gpio_context_count;