On 04/19/2012 06:31 PM, Marek Vasut wrote:
> From: Marek Vasut <marek.vasut@xxxxxxxxx>
>
> If there's some traffic on the LCD controller pads, the BootROM has trouble with
> sampling the bootmode from these pads. The BootROM usually ends in a loop.
>
> Signed-off-by: Marek Vasut <marek.vasut@xxxxxxxxx>
> Cc: Chen Peter-B29397 <B29397@xxxxxxxxxxxxx>
> Cc: Detlev Zundel <dzu@xxxxxxx>
> Cc: Fabio Estevam <festevam@xxxxxxxxx>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@xxxxxx>
> Cc: Li Frank-B20596 <B20596@xxxxxxxxxxxxx>
> Cc: Lin Tony-B19295 <B19295@xxxxxxxxxxxxx>
> Cc: Linux FBDEV <linux-fbdev@xxxxxxxxxxxxxxx>
> Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxxxxx>
> Cc: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Cc: Stefano Babic <sbabic@xxxxxxx>
> Cc: Subodh Nijsure <snijsure@xxxxxxxxxxxx>
> Cc: Tony Lin <tony.lin@xxxxxxxxxxxxx>
> Cc: Wolfgang Denk <wd@xxxxxxx>
> Acked-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
> Acked-by: Wolfgang Denk <wd@xxxxxxx>
> Acked-by: Wolfram Sang <w.sang@xxxxxxxxxxxxxx>
> Tested-by: Wolfgang Denk <wd@xxxxxxx>
Applied.
Thanks,
Florian Tobias Schandinat
> ---
> drivers/video/mxsfb.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> V2: Make shutdown() call static
>
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 4a89f88..dcf29bf 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -880,6 +880,18 @@ static int __devexit mxsfb_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static void mxsfb_shutdown(struct platform_device *pdev)
> +{
> + struct fb_info *fb_info = platform_get_drvdata(pdev);
> + struct mxsfb_info *host = to_imxfb_host(fb_info);
> +
> + /*
> + * Force stop the LCD controller as keeping it running during reboot
> + * might interfere with the BootROM's boot mode pads sampling.
> + */
> + writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR);
> +}
> +
> static struct platform_device_id mxsfb_devtype[] = {
> {
> .name = "imx23-fb",
> @@ -896,6 +908,7 @@ MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
> static struct platform_driver mxsfb_driver = {
> .probe = mxsfb_probe,
> .remove = __devexit_p(mxsfb_remove),
> + .shutdown = mxsfb_shutdown,
> .id_table = mxsfb_devtype,
> .driver = {
> .name = DRIVER_NAME,
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