From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/5] input: Provide a board specific mechanism to decide whether to skip i8042 init
Date: Fri, 12 Oct 2012 09:05:36 -0700 [thread overview]
Message-ID: <50783FD0.5040803@ti.com> (raw)
In-Reply-To: <1350004554-18506-2-git-send-email-sjg@chromium.org>
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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
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next prev parent reply other threads:[~2012-10-12 16:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-12 1:15 [U-Boot] [PATCH 1/5] input: Use finer grain udelays while waitng for the i8042 keyboard buffer to empty Simon Glass
2012-10-12 1:15 ` [U-Boot] [PATCH 2/5] input: Provide a board specific mechanism to decide whether to skip i8042 init Simon Glass
2012-10-12 16:05 ` Tom Rini [this message]
2012-10-13 0:03 ` Simon Glass
2012-10-12 1:15 ` [U-Boot] [PATCH 3/5] input: i8042: Provide feature to disable keyboard before booting kernel Simon Glass
2012-10-12 1:15 ` [U-Boot] [PATCH 4/5] input: Fix i8042 keyboard reset Simon Glass
2012-10-12 1:15 ` [U-Boot] [PATCH 5/5] input: Add ANSI 3.64 escape sequence generation Simon Glass
2012-10-12 3:55 ` [U-Boot] [PATCH 1/5] input: Use finer grain udelays while waitng for the i8042 keyboard buffer to empty Graeme Russ
2012-10-12 23:44 ` Simon Glass
2012-10-20 17:42 ` Tom Rini
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