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input: i8042: Make sure the keyboard is enabled 

Add one more step into the init sequence. This fixes the keyboard on samus,
which otherwise does not work.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2016-03-11 22:06:50 -07:00 committed by Bin Meng
parent 532f2435cf
commit 8226a3e99f
2 changed files with 5 additions and 0 deletions
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4
drivers/input/i8042.c
View File

@ -134,6 +134,10 @@ static int kbd_reset(int quirk)
kbd_read(I8042_DATA_REG) != KBD_POR)
goto err;
if (kbd_write(I8042_DATA_REG, CMD_DRAIN_OUTPUT) ||
kbd_read(I8042_DATA_REG) != KBD_ACK)
goto err;
/* set AT translation and disable irq */
config = kbd_cmd_read(CMD_RD_CONFIG);
if (config == -1)

1
include/i8042.h
View File

@ -35,6 +35,7 @@
#define CMD_KBD_DIS 0xad /* keyboard disable */
#define CMD_KBD_EN 0xae /* keyboard enable */
#define CMD_SET_KBD_LED 0xed /* set keyboard led */
#define CMD_DRAIN_OUTPUT 0xf4 /* drain output buffer */
#define CMD_RESET_KBD 0xff /* reset keyboard */
/* i8042 command result */