[PATCH 2/3] GTA02: use POWER button to append debug parameters to the kernel command line

[Paul Fertser]

---
 src/cpu/s3c2442/gta02.c |   25 +++++++++++++++----------
 1 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/src/cpu/s3c2442/gta02.c b/src/cpu/s3c2442/gta02.c
index d0dafd0..ac18338 100644
--- a/src/cpu/s3c2442/gta02.c
+++ b/src/cpu/s3c2442/gta02.c
@@ -378,31 +378,35 @@ static void close_gta02(void)
 
 }
 
+/* Here we will care only about AUX button as polling for PWR button
+ * through i2c slows down the boot */
+
 static u8 get_ui_keys_gta02(void)
 {
        u8 keys;
-       u8 ret;
+       u8 ret = 0;
        static u8 old_keys = 0; /* previous state for debounce */
-       static u8 old_ret = 0; /* previous debounced output for edge detect */
+       static u8 older_keys = 0; /* previous debounced output for edge detect 
*/
 
-       /* GPF6 is AUX on GTA02, map to UI_ACTION_ADD_DEBUG, down = 1 */
+       /* GPF6 is AUX on GTA02, map to UI_ACTION_SKIPKERNEL, down = 1 */
        keys = !!(rGPFDAT & (1 << 6));
 
-       if (keys == old_keys)
-               ret = keys;
-       else
-               ret = old_keys;
-
        /* edge action */
-       if ((ret & 1) && !(old_ret & 1))
+       if ((old_keys & 1) && !(older_keys & 1))
                ret |= UI_ACTION_SKIPKERNEL;
 
+       older_keys = old_keys;
        old_keys = keys;
-       old_ret = ret;
        
        return ret;
 }
 
+static u8 get_ui_debug_gta02(void)
+{
+       /* PWR button state can be seen in OOCSTAT b0, down = 0, map to 
UI_ACTION_ADD_DEBUG */
+       return !(i2c_read_sync(&bb_s3c24xx, PCF50633_I2C_ADS, 
PCF50633_REG_OOCSTAT) & 1);
+}
+
 static void set_ui_indication_gta02(enum ui_indication ui_indication)
 {
 
@@ -456,6 +460,7 @@ const struct board_api board_api_gta02 = {
        .putc = putc_gta02,
        .close = close_gta02,
        .get_ui_keys = get_ui_keys_gta02,
+       .get_ui_debug = get_ui_debug_gta02,
        .set_ui_indication = set_ui_indication_gta02,
        .commandline_board = "mtdparts=physmap-flash:-(nor);" \
                                       "neo1973-nand:" \
-- 
1.5.2.2