From mboxrd@z Thu Jan 1 00:00:00 1970 From: Magnus Damm Subject: [RESEND][PATCH] sm501fb: control panel pin usage with platform data flags Date: Mon, 21 Jan 2008 19:57:29 +0900 Message-ID: <20080121105729.12440.66026.sendpatchset@clockwork.opensource.se> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1JGuOf-0004w7-GM for linux-fbdev-devel@lists.sourceforge.net; Mon, 21 Jan 2008 03:00:57 -0800 Received: from wa-out-1112.google.com ([209.85.146.178]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1JGuOf-0004dD-3I for linux-fbdev-devel@lists.sourceforge.net; Mon, 21 Jan 2008 03:00:57 -0800 Received: by wa-out-1112.google.com with SMTP id k22so3893864waf.18 for ; Mon, 21 Jan 2008 03:00:56 -0800 (PST) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: linux-fbdev-devel@lists.sourceforge.net Cc: akpm@linux-foundation.org, lethal@linux-sh.org, magnus.damm@gmail.com, ben-linux@fluff.org sm501fb: control panel pin usage with platform data flags This patch makes it possible to control panel pins usage with flags passed from the platform data. Without this patch the sm501fb driver always controls the VBIASEN and FPEN pins. The polarity and use of these pins are very platform specific, so this patch introduces the flags SM501FB_FLAG_PANEL_USE_VBIASEN and SM501FB_FLAG_PANEL_USE_FPEN which enable the use of these pins. This patch is needed to support the a Sharp LQ104V1DG21 lcd panel on SuperH platforms such as R2D-1 and R2D-PLUS boards. Letting the sm501fb driver control the FPEN and VBIASEN pins like today just results in lcd panel flicker. Signed-off-by: Magnus Damm --- This is the same patch that was sent to linux-fbdev-devel on 20071228. drivers/video/sm501fb.c | 41 +++++++++++++++++++++++++---------------- include/linux/sm501.h | 2 ++ 2 files changed, 27 insertions(+), 16 deletions(-) --- 0003/drivers/video/sm501fb.c +++ work/drivers/video/sm501fb.c 2007-12-27 14:18:28.000000000 +0900 @@ -639,6 +639,7 @@ static void sm501fb_panel_power(struct s { unsigned long control; void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL; + struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl; control = readl(ctrl_reg); @@ -655,26 +656,34 @@ static void sm501fb_panel_power(struct s sm501fb_sync_regs(fbi); mdelay(10); - control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */ - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - - control |= SM501_DC_PANEL_CONTROL_FPEN; - writel(control, ctrl_reg); + if (pd->flags & SM501FB_FLAG_PANEL_USE_VBIASEN) { + control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */ + writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } + if (pd->flags & SM501FB_FLAG_PANEL_USE_FPEN) { + control |= SM501_DC_PANEL_CONTROL_FPEN; + writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) { /* disable panel power */ + if (pd->flags & SM501FB_FLAG_PANEL_USE_FPEN) { + control &= ~SM501_DC_PANEL_CONTROL_FPEN; + writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } - control &= ~SM501_DC_PANEL_CONTROL_FPEN; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); - - control &= ~SM501_DC_PANEL_CONTROL_BIAS; - writel(control, ctrl_reg); - sm501fb_sync_regs(fbi); - mdelay(10); + if (pd->flags & SM501FB_FLAG_PANEL_USE_VBIASEN) { + control &= ~SM501_DC_PANEL_CONTROL_BIAS; + writel(control, ctrl_reg); + sm501fb_sync_regs(fbi); + mdelay(10); + } control &= ~SM501_DC_PANEL_CONTROL_DATA; writel(control, ctrl_reg); --- 0001/include/linux/sm501.h +++ work/include/linux/sm501.h 2007-12-27 14:13:40.000000000 +0900 @@ -70,6 +70,8 @@ extern unsigned long sm501_gpio_get(stru #define SM501FB_FLAG_DISABLE_AT_EXIT (1<<1) #define SM501FB_FLAG_USE_HWCURSOR (1<<2) #define SM501FB_FLAG_USE_HWACCEL (1<<3) +#define SM501FB_FLAG_PANEL_USE_FPEN (1<<4) +#define SM501FB_FLAG_PANEL_USE_VBIASEN (1<<5) struct sm501_platdata_fbsub { struct fb_videomode *def_mode; ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/