From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Tue, 17 Apr 2012 20:36:51 +0000 Subject: [PATCH] i.MX28: Shut down the LCD controller to avoid bootrom sampling bug Message-Id: <1334695011-8188-1-git-send-email-marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org From: Marek Vasut Signed-off-by: Marek Vasut Cc: Chen Peter-B29397 Cc: Detlev Zundel Cc: Fabio Estevam Cc: Florian Tobias Schandinat Cc: Li Frank-B20596 Cc: Lin Tony-B19295 Cc: Linux FBDEV Cc: Sascha Hauer Cc: Shawn Guo Cc: Shawn Guo Cc: Stefano Babic Cc: Subodh Nijsure Cc: Tony Lin Cc: Wolfgang Denk Acked-by: Wolfram Sang --- drivers/video/mxsfb.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c index 4a89f88..a265356 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; } +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, -- 1.7.9.5