MFD: ucb1x00-core: add wakeup support

Add genirq wakeup support for the ucb1x00 device.  This allows an
attached gpio_keys driver to wakeup the system.  Touchscreen is also
possible.

When there are no wakeup sources, ask the platform to assert the reset
signal to avoid any unexpected behaviour; this also puts the reset
signal at the right level when power is removed from the device.

Acked-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mfd/ucb1x00.h b/include/linux/mfd/ucb1x00.h
index 6fb907446c33..28af41756360 100644
--- a/include/linux/mfd/ucb1x00.h
+++ b/include/linux/mfd/ucb1x00.h
@@ -106,6 +106,8 @@
 
 enum ucb1x00_reset {
         UCB_RST_PROBE,
+        UCB_RST_RESUME,
+        UCB_RST_SUSPEND,
         UCB_RST_REMOVE,
         UCB_RST_PROBE_FAIL,
 };
@@ -114,6 +116,7 @@ struct ucb1x00_plat_data {
         void                    (*reset)(enum ucb1x00_reset);
         unsigned                irq_base;
         int                     gpio_base;
+        unsigned                can_wakeup;
 };
 
 struct ucb1x00 {
@@ -130,6 +133,7 @@ struct ucb1x00 {
         u16                     irq_fal_enbl;
         u16                     irq_ris_enbl;
         u16                     irq_mask;
+        u16                     irq_wake;
         struct device           dev;
         struct list_head        node;
         struct list_head        devs;