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On 10/11/12 18:15, Simon Glass wrote:
From: Gabe Black gabeblack@chromium.org
This change adds a board overridable function which can be used to decide whether or not to initialize the i8042 keyboard controller. On systems where it isn't actually connected to anything, this can save a significant amount of boot time.
On Stumpy, this saves about 200ms on boot.
Signed-off-by: Gabe Black gabeblack@chromium.org Signed-off-by: Simon Glass sjg@chromium.org --- drivers/input/i8042.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/drivers/input/i8042.c b/drivers/input/i8042.c index 99254e4..cae2d0a 100644 --- a/drivers/input/i8042.c +++ b/drivers/input/i8042.c @@ -320,6 +320,17 @@ static int kbd_controller_present(void) return in8(I8042_STATUS_REG) != 0xff; }
+/* + * Implement a weak default function for boards that optionally + * need to skip the i8042 initialization. + */ +int __board_i8042_skip(void) +{ + /* As default, don't skip */ + return 0; +} +int board_i8042_skip(void) __attribute__((weak, alias("__board_i8042_skip")));
Please add <linux/compiler.h> and use __weak directly, thanks.
- -- Tom