twl4030-gpio: cleanup debounce

Provide a static debounce configuration mechanism for twl4030 GPIOs,
replacing the previous dynamic one.  The single user of that mechanism was
for MMC card detect debouncing.

Boards can provide a bitmask saying which GPIOs to debounce (30 msec).
It's always enabled for pins with the MMC card-detect/VMMCx link active,
so most boards won't need to set the debounce mask.

This is a net code shrink, including runtime footprint.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
index a8f84c01f82e..8137f660a5cc 100644
--- a/include/linux/i2c/twl4030.h
+++ b/include/linux/i2c/twl4030.h
@@ -234,6 +234,9 @@ struct twl4030_gpio_platform_data {
         /* gpio-n should control VMMC(n+1) if BIT(n) in mmc_cd is set */
         u8              mmc_cd;
 
+        /* if BIT(N) is set, or VMMC(n+1) is linked, debounce GPIO-N */
+        u32             debounce;
+
         /* For gpio-N, bit (1 << N) in "pullups" is set if that pullup
          * should be enabled.  Else, if that bit is set in "pulldowns",
          * that pulldown is enabled.  Don't waste power by letting any
@@ -307,12 +310,6 @@ int twl4030_sih_setup(int module);
 #define TWL4030_VAUX3_DEV_GRP           0x1F
 #define TWL4030_VAUX3_DEDICATED         0x22
 
-/*
- * Exported TWL4030 GPIO APIs
- *
- * WARNING -- use standard GPIO and IRQ calls instead; these will vanish.
- */
-int twl4030_set_gpio_debounce(int gpio, int enable);
 
 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
         defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)