From patchwork Tue May 18 12:35:04 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 100465 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o4ICaXw8000815 for ; Tue, 18 May 2010 12:36:33 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757565Ab0ERMgb (ORCPT ); Tue, 18 May 2010 08:36:31 -0400 Received: from smtp.nokia.com ([192.100.105.134]:62551 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757528Ab0ERMga (ORCPT ); Tue, 18 May 2010 08:36:30 -0400 Received: from vaebh105.NOE.Nokia.com (vaebh105.europe.nokia.com [10.160.244.31]) by mgw-mx09.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o4ICZw7q019209; Tue, 18 May 2010 07:36:28 -0500 Received: from vaebh104.NOE.Nokia.com ([10.160.244.30]) by vaebh105.NOE.Nokia.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 May 2010 15:36:08 +0300 Received: from mgw-da01.ext.nokia.com ([147.243.128.24]) by vaebh104.NOE.Nokia.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Tue, 18 May 2010 15:36:07 +0300 Received: from localhost.localdomain (esdhcp041221.research.nokia.com [172.21.41.221]) by mgw-da01.ext.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o4ICZbxO017740; Tue, 18 May 2010 15:36:03 +0300 From: Tomi Valkeinen To: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org Cc: Vaibhav Hiremath , Tomi Valkeinen Subject: [PATCH 13/23] OMAP: LCD LS037V7DW01: Add Backlight driver support Date: Tue, 18 May 2010 15:35:04 +0300 Message-Id: <1274186114-26951-14-git-send-email-tomi.valkeinen@nokia.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1274186114-26951-1-git-send-email-tomi.valkeinen@nokia.com> References: <1274186114-26951-1-git-send-email-tomi.valkeinen@nokia.com> X-OriginalArrivalTime: 18 May 2010 12:36:07.0838 (UTC) FILETIME=[B05C73E0:01CAF686] X-Nokia-AV: Clean Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 18 May 2010 12:36:34 +0000 (UTC) diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig index dfb57ee..ea8ccd3 100644 --- a/drivers/video/omap2/displays/Kconfig +++ b/drivers/video/omap2/displays/Kconfig @@ -10,6 +10,7 @@ config PANEL_GENERIC config PANEL_SHARP_LS037V7DW01 tristate "Sharp LS037V7DW01 LCD Panel" depends on OMAP2_DSS + select BACKLIGHT_CLASS_DEVICE help LCD Panel used in TI's SDP3430 and EVM boards diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c index 8d51a5e..7d9eb2b 100644 --- a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c +++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c @@ -20,10 +20,17 @@ #include #include #include +#include +#include #include +#include #include +struct sharp_data { + struct backlight_device *bl; +}; + static struct omap_video_timings sharp_ls_timings = { .x_res = 480, .y_res = 640, @@ -39,18 +46,89 @@ static struct omap_video_timings sharp_ls_timings = { .vbp = 1, }; +static int sharp_ls_bl_update_status(struct backlight_device *bl) +{ + struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev); + int level; + + if (!dssdev->set_backlight) + return -EINVAL; + + if (bl->props.fb_blank == FB_BLANK_UNBLANK && + bl->props.power == FB_BLANK_UNBLANK) + level = bl->props.brightness; + else + level = 0; + + return dssdev->set_backlight(dssdev, level); +} + +static int sharp_ls_bl_get_brightness(struct backlight_device *bl) +{ + if (bl->props.fb_blank == FB_BLANK_UNBLANK && + bl->props.power == FB_BLANK_UNBLANK) + return bl->props.brightness; + + return 0; +} + +static const struct backlight_ops sharp_ls_bl_ops = { + .get_brightness = sharp_ls_bl_get_brightness, + .update_status = sharp_ls_bl_update_status, +}; + + + static int sharp_ls_panel_probe(struct omap_dss_device *dssdev) { + struct backlight_properties props; + struct backlight_device *bl; + struct sharp_data *sd; + int r; + dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS; dssdev->panel.acb = 0x28; dssdev->panel.timings = sharp_ls_timings; + sd = kzalloc(sizeof(*sd), GFP_KERNEL); + if (!sd) + return -ENOMEM; + + dev_set_drvdata(&dssdev->dev, sd); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = dssdev->max_backlight_level; + + bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev, + &sharp_ls_bl_ops, &props); + if (IS_ERR(bl)) { + r = PTR_ERR(bl); + kfree(sd); + return r; + } + sd->bl = bl; + + bl->props.fb_blank = FB_BLANK_UNBLANK; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.brightness = dssdev->max_backlight_level; + r = sharp_ls_bl_update_status(bl); + if (r < 0) + dev_err(&dssdev->dev, "failed to set lcd brightness\n"); + return 0; } static void sharp_ls_panel_remove(struct omap_dss_device *dssdev) { + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); + struct backlight_device *bl = sd->bl; + + bl->props.power = FB_BLANK_POWERDOWN; + sharp_ls_bl_update_status(bl); + backlight_device_unregister(bl); + + kfree(sd); } static int sharp_ls_power_on(struct omap_dss_device *dssdev)