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gpio_backlight_probe(struct platform_device *pdev) +> +{ +> + struct gpio_backlight_platform_data *pdata = pdev->dev.platform_data; +> + struct backlight_properties props; +> + struct backlight_device *bl; +> + struct gpio_backlight *gbl; +> + int ret; +> + +> + gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL); +> + if (gbl == NULL) +> + return -ENOMEM; +> + +> + gbl->dev = &pdev->dev; +> + +> + if (!pdata) { +> + dev_err(&pdev->dev, "failed to find platform data\n"); +> + return -ENODEV; +> + } +> + +> + gbl->fbdev = pdata->fbdev; +> + gbl->gpio = pdata->gpio; +> + gbl->active = pdata->active_low ? 0 : 1; +> + +> + ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT, +> + pdata->name); + +Please use GPIOF_INIT flags if you want to turn off GPIO backlight. +If gbl->active is inverted, GPIOF_INIT_HIGH can be used as below: + + ret = devm_gpio_request_one(gbl->dev, gbl->gpio, + GPIOF_DIR_OUT | (gbl->active ? + GPIOF_INIT_LOW : GPIOF_INIT_HIGH), + pdata->name); + +Best regards, +Jingoo Han + +> + if (ret < 0) { +> + dev_err(&pdev->dev, "unable to request GPIO\n"); +> + return ret; +> + } +> + +> + memset(&props, 0, sizeof(props)); +> + props.type = BACKLIGHT_RAW; +> + props.max_brightness = 1; +> + bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, gbl, +> + &gpio_backlight_ops, &props); +> + if (IS_ERR(bl)) { +> + dev_err(&pdev->dev, "failed to register backlight\n"); +> + return PTR_ERR(bl); +> + } +> + +> + bl->props.brightness = pdata->def_value; +> + backlight_update_status(bl); +> + +> + platform_set_drvdata(pdev, bl); +> + return 0; +> +} + + +ÿôèº{.nÇ+‰·Ÿ®‰†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a¢f£¢·hšïêÿ‘êçz_è®\x03(階ŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨èÚ&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥ diff --git a/a/content_digest b/N1/content_digest index 03b20eb..0665f7c 100644 --- a/a/content_digest +++ b/N1/content_digest @@ -1,7 +1,6 @@ - "ref\01353688515-30458-2-git-send-email-laurent.pinchart+renesas@ideasonboard.com\0" "From\0Jingoo Han <jg1.han@samsung.com>\0" "Subject\0Re: [PATCH 1/5] backlight: Add GPIO-based backlight driver\0" - "Date\0Tue, 27 Nov 2012 01:10:38 +0000\0" + "Date\0Tue, 27 Nov 2012 01:10:37 +0000 (GMT)\0" "To\0Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>\0" "Cc\0akpm@linux-foundation.org" linux-kernel@vger.kernel.org @@ -14,45 +13,80 @@ " Jingoo Han <jg1.han@samsung.com>\0" "\00:1\0" "b\0" - "T24gU2F0dXJkYXksIE5vdmVtYmVyIDI0LCAyMDEyIDE6MzUgQU0sIExhdXJlbnQgUGluY2hhcnQg\n" - "d3JvdGUNCj4gDQo+IFNpZ25lZC1vZmYtYnk6IExhdXJlbnQgUGluY2hhcnQgPGxhdXJlbnQucGlu\n" - "Y2hhcnRAaWRlYXNvbmJvYXJkLmNvbT4NCj4gLS0tDQo+ICBkcml2ZXJzL3ZpZGVvL2JhY2tsaWdo\n" - "dC9LY29uZmlnICAgICAgICAgIHwgICAgNyArKw0KPiAgZHJpdmVycy92aWRlby9iYWNrbGlnaHQv\n" - "TWFrZWZpbGUgICAgICAgICB8ICAgIDEgKw0KPiAgZHJpdmVycy92aWRlby9iYWNrbGlnaHQvZ3Bp\n" - "b19iYWNrbGlnaHQuYyB8ICAxNTggKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrDQo+ICBp\n" - 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++\n" + "> drivers/video/backlight/Makefile | 1 +\n" + "> drivers/video/backlight/gpio_backlight.c | 158 ++++++++++++++++++++++++++++++\n" + "> include/video/gpio_backlight.h | 21 ++++\n" + "> 4 files changed, 187 insertions(+), 0 deletions(-)\n" + "> create mode 100644 drivers/video/backlight/gpio_backlight.c\n" + "> create mode 100644 include/video/gpio_backlight.h\n" + "\n" + "[...]\n" + "\n" + "> +static int __devinit gpio_backlight_probe(struct platform_device *pdev)\n" + "> +{\n" + "> +\tstruct gpio_backlight_platform_data *pdata = pdev->dev.platform_data;\n" + "> +\tstruct backlight_properties props;\n" + "> +\tstruct backlight_device *bl;\n" + "> +\tstruct gpio_backlight *gbl;\n" + "> +\tint ret;\n" + "> +\n" + "> +\tgbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL);\n" + "> +\tif (gbl == NULL)\n" + "> +\t\treturn -ENOMEM;\n" + "> +\n" + "> +\tgbl->dev = &pdev->dev;\n" + "> +\n" + "> +\tif (!pdata) {\n" + "> +\t\tdev_err(&pdev->dev, \"failed to find platform data\\n\");\n" + "> +\t\treturn -ENODEV;\n" + "> +\t}\n" + "> +\n" + "> +\tgbl->fbdev = pdata->fbdev;\n" + "> +\tgbl->gpio = pdata->gpio;\n" + "> +\tgbl->active = pdata->active_low ? 0 : 1;\n" + "> +\n" + "> +\tret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT,\n" + "> +\t\t\t\t pdata->name);\n" + "\n" + "Please use GPIOF_INIT flags if you want to turn off GPIO backlight.\n" + "If gbl->active is inverted, GPIOF_INIT_HIGH can be used as below:\n" + "\n" + "\tret = devm_gpio_request_one(gbl->dev, gbl->gpio,\n" + "\t\t\t\t GPIOF_DIR_OUT | (gbl->active ?\n" + "\t\t\t\t GPIOF_INIT_LOW : GPIOF_INIT_HIGH),\n" + "\t\t\t\t pdata->name);\n" + "\n" + "Best regards,\n" + "Jingoo Han\n" + "\n" + "> +\tif (ret < 0) {\n" + "> +\t\tdev_err(&pdev->dev, \"unable to request GPIO\\n\");\n" + "> +\t\treturn ret;\n" + "> +\t}\n" + "> +\n" + "> +\tmemset(&props, 0, sizeof(props));\n" + "> +\tprops.type = BACKLIGHT_RAW;\n" + "> +\tprops.max_brightness = 1;\n" + "> +\tbl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, gbl,\n" + "> +\t\t\t\t &gpio_backlight_ops, &props);\n" + "> +\tif (IS_ERR(bl)) {\n" + "> +\t\tdev_err(&pdev->dev, \"failed to register backlight\\n\");\n" + "> +\t\treturn PTR_ERR(bl);\n" + "> +\t}\n" + "> +\n" + "> +\tbl->props.brightness = pdata->def_value;\n" + "> +\tbacklight_update_status(bl);\n" + "> +\n" + "> +\tplatform_set_drvdata(pdev, bl);\n" + "> +\treturn 0;\n" + "> +}\n" + "\n" + "\n" + 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