Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754588Ab1DMMDG (ORCPT ); Wed, 13 Apr 2011 08:03:06 -0400 Received: from db3ehsobe005.messaging.microsoft.com ([213.199.154.143]:57836 "EHLO DB3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753573Ab1DMMDF (ORCPT ); Wed, 13 Apr 2011 08:03:05 -0400 X-SpamScore: 1 X-BigFish: VPS1(zz936eKc8kzz1202hzz8275bh84d07hz32i2a8h668h839h) X-Forefront-Antispam-Report: KIP:(null);UIP:(null);IPVD:NLI;H:kcinpunhjhc02.kpit.com;RD:none;EFVD:NLI From: Ashish Jangam To: Richard Purdie CC: "linux-kernel@vger.kernel.org" , David Dajun Chen Date: Wed, 13 Apr 2011 17:32:45 +0530 Subject: [PATCHv1 9/11] BACKLIGHT: Backlight module for DA9052 PMIC driver Thread-Topic: [PATCHv1 9/11] BACKLIGHT: Backlight module for DA9052 PMIC driver Thread-Index: Acv50rMjRG3parmiQl6om+QiNrUhSQ== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-OriginatorOrg: kpitcummins.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id p3DC3FlS011233 Content-Length: 7183 Lines: 263 Hi Richard, Backlight Driver for Dialog Semiconductor DA9052 PMICs. Changes made since last submission: . Ported the driver to Linux kernel 2.6.38.2 Linux Kernel Version: 2.6.38.2 Signed-off-by: D. Chen --- diff -Naur linux-2.6.38.2/drivers/video/backlight/da9052_bl.c wrk_linux-2.6.38.2/drivers/video/backlight/da9052_bl.c --- linux-2.6.38.2/drivers/video/backlight/da9052_bl.c 1970-01-01 05:00:00.000000000 +0500 +++ wrk_linux-2.6.38.2/drivers/video/backlight/da9052_bl.c 2011-04-13 12:32:19.000000000 +0500 @@ -0,0 +1,215 @@ +/* + * Backlight Driver for Dialog DA9052 PMICs + * + * Copyright(c) 2009 Dialog Semiconductor Ltd. + * + * Author: Dajun Chen + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include +#include +#include +#include + +#include +#include + +#define DA9052_MAX_BRIGHTNESS 0xFF + +enum { + DA9052_WLEDS_OFF, + DA9052_WLEDS_ON, + }; + +u8 wled_bank[] = { + DA9052_LED1_CONF_REG, + DA9052_LED2_CONF_REG, + DA9052_LED3_CONF_REG, + }; + +struct da9052_bl { + struct da9052 *da9052; + uint brightness; + uint state; + uint led_reg; + }; + +static int da9052_adjust_wled_brightness(struct da9052_bl *wleds) +{ + u8 boost_en, i_sink; + int ret = 0; + + boost_en = 0x3F; + i_sink = 0xFF; + if (wleds->state == DA9052_WLEDS_OFF) { + boost_en = 0x00; + i_sink = 0x00; + } + + ret = da9052_reg_write(wleds->da9052, DA9052_BOOST_REG, boost_en); + if (ret < 0) { + dev_err(wleds->da9052->dev, + "Failed to write boost reg, %d\n", ret); + return ret; + } + + ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink); + if (ret < 0) { + dev_err(wleds->da9052->dev, + "Failed to write led cont reg, %d\n", ret); + return ret; + } + + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], + 0x0); + if (ret < 0) { + dev_err(wleds->da9052->dev, + "Failed to write led conf reg, %d", ret); + return ret; + } + + if (wleds->brightness) { + msleep(10); + ret = da9052_reg_write(wleds->da9052, + wled_bank[wleds->led_reg], wleds->brightness); + if (ret < 0) + dev_err(wleds->da9052->dev, + "Failed to write led conf reg, %d", ret); + } + + return ret; + +} + +static int da9052_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = brightness; + wleds->state = DA9052_WLEDS_ON; + + return da9052_adjust_wled_brightness(wleds); +} + +static int da9052_backlight_get_brightness(struct backlight_device *bl) +{ + struct da9052_bl *wleds = bl_get_data(bl); + return wleds->brightness; +} + +struct backlight_ops da9052_backlight_ops = { + .update_status = da9052_backlight_update_status, + .get_brightness = da9052_backlight_get_brightness, +}; + +static int da9052_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct backlight_properties props; + int ret = 0; + static int led_reg_num; + struct da9052_bl *wleds; + + + wleds = kzalloc(sizeof(struct da9052_bl), GFP_KERNEL); + + if (!wleds) + return -ENOMEM; + + wleds->da9052 = dev_get_drvdata(pdev->dev.parent); + wleds->brightness = 0; + wleds->led_reg = led_reg_num++; + wleds->state = DA9052_WLEDS_OFF; + + bl = backlight_device_register(pdev->name, wleds->da9052->dev, + wleds, &da9052_backlight_ops, &props); + + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "Failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + platform_set_drvdata(pdev, bl); + + ret = da9052_adjust_wled_brightness(wleds); + if (ret) + return ret; + + return 0; +} + +static int da9052_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = 0; + wleds->state = DA9052_WLEDS_OFF; + + da9052_adjust_wled_brightness(wleds); + backlight_device_unregister(bl); + + return 0; +} + +static struct platform_driver da9052_wled1_driver = { + .driver.name = "da9052-WLED1", + .driver.owner = THIS_MODULE, + .probe = da9052_backlight_probe, + .remove = da9052_backlight_remove, +}; + +static struct platform_driver da9052_wled2_driver = { + .driver.name = "da9052-WLED2", + .driver.owner = THIS_MODULE, + .probe = da9052_backlight_probe, + .remove = da9052_backlight_remove, +}; +static struct platform_driver da9052_wled3_driver = { + .driver.name = "da9052-WLED3", + .driver.owner = THIS_MODULE, + .probe = da9052_backlight_probe, + .remove = da9052_backlight_remove, +}; + +static int __init da9052_backlight_init(void) +{ + s32 ret; + ret = platform_driver_register(&da9052_wled1_driver); + if (ret) + return ret; + ret = platform_driver_register(&da9052_wled2_driver); + if (ret) + return ret; + + ret = platform_driver_register(&da9052_wled3_driver); + if (ret) + return ret; + + return 0; +} +module_init(da9052_backlight_init); + +static void __exit da9052_backlight_exit(void) +{ + platform_driver_unregister(&da9052_wled1_driver); + platform_driver_unregister(&da9052_wled2_driver); + platform_driver_unregister(&da9052_wled3_driver); +} +module_exit(da9052_backlight_exit); + +MODULE_AUTHOR("Dialog Semiconductor Ltd "); +MODULE_DESCRIPTION("Backlight driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL v2"); + + diff -Naur linux-2.6.38.2/drivers/video/backlight/Kconfig wrk_linux-2.6.38.2/drivers/video/backlight/Kconfig --- linux-2.6.38.2/drivers/video/backlight/Kconfig 2011-03-27 23:37:20.000000000 +0500 +++ wrk_linux-2.6.38.2/drivers/video/backlight/Kconfig 2011-04-13 12:32:34.000000000 +0500 @@ -229,6 +229,12 @@ If you have a LCD backlight connected to the WLED output of DA9030 or DA9034 WLED output, say Y here to enable this driver. +config BACKLIGHT_DA9052 + tristate "Dialog DA9052 WLED" + depends on PMIC_DA9052 + help + Enable the DA9052 Backlight Driver + config BACKLIGHT_MAX8925 tristate "Backlight driver for MAX8925" depends on MFD_MAX8925 diff -Naur linux-2.6.38.2/drivers/video/backlight/Makefile wrk_linux-2.6.38.2/drivers/video/backlight/Makefile --- linux-2.6.38.2/drivers/video/backlight/Makefile 2011-03-27 23:37:20.000000000 +0500 +++ wrk_linux-2.6.38.2/drivers/video/backlight/Makefile 2011-04-13 12:32:26.000000000 +0500 @@ -25,6 +25,7 @@ obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o +obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o obj-$(CONFIG_BACKLIGHT_MBP_NVIDIA) += mbp_nvidia_bl.o obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o Regards, Ashish J ????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m???? ????????I?