gpio: gpio-omap: add check for off wake capable gpios

We are currently assuming all GPIOs are non-wakeup capable GPIOs as we
not configuring the bank->non_wakeup_gpios like we used to earlier with
platform_data.

Let's add omap_gpio_is_off_wakeup_capable() to make the handling clearer
while considering that later patches may want to configure SoC specific
bank->non_wakeup_gpios for the GPIOs in wakeup domain.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Reported-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

1 files changed, 17 insertions, 8 deletions

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index a28196453029..4d1bf884fcbc 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -352,6 +352,22 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset)
         }
 }
 
+/*
+ * Off mode wake-up capable GPIOs in bank(s) that are in the wakeup domain.
+ * See TRM section for GPIO for "Wake-Up Generation" for the list of GPIOs
+ * in wakeup domain. If bank->non_wakeup_gpios is not configured, assume none
+ * are capable waking up the system from off mode.
+ */
+static bool omap_gpio_is_off_wakeup_capable(struct gpio_bank *bank, u32 gpio_mask)
+{
+        u32 no_wake = bank->non_wakeup_gpios;
+
+        if (no_wake)
+                return !!(~no_wake & gpio_mask);
+
+        return false;
+}
+
 static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
                                                 unsigned trigger)
 {
@@ -383,13 +399,7 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
         }
 
         /* This part needs to be executed always for OMAP{34xx, 44xx} */
-        if (!bank->regs->irqctrl) {
-                /* On omap24xx proceed only when valid GPIO bit is set */
-                if (bank->non_wakeup_gpios) {
-                        if (!(bank->non_wakeup_gpios & gpio_bit))
-                                goto exit;
-                }
-
+        if (!bank->regs->irqctrl && !omap_gpio_is_off_wakeup_capable(bank, gpio)) {
                 /*
                  * Log the edge gpio and manually trigger the IRQ
                  * after resume if the input level changes
@@ -402,7 +412,6 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
                         bank->enabled_non_wakeup_gpios &= ~gpio_bit;
         }
 
-exit:
         bank->level_mask =
                 readl_relaxed(bank->base + bank->regs->leveldetect0) |
                 readl_relaxed(bank->base + bank->regs->leveldetect1);