From patchwork Fri Jul 15 14:42:45 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Banajit Goswami X-Patchwork-Id: 980462 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p6FIPqxQ011165 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 15 Jul 2011 18:26:13 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qhn4v-0002ic-4G; Fri, 15 Jul 2011 18:25:33 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qhjcb-0004Iq-73; Fri, 15 Jul 2011 14:44:05 +0000 Received: from mailout2.samsung.com ([203.254.224.25]) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QhjbF-000426-4A for linux-arm-kernel@lists.infradead.org; Fri, 15 Jul 2011 14:42:45 +0000 Received: from epcpsbgm2.samsung.com (mailout2.samsung.com [203.254.224.25]) by mailout2.samsung.com (Oracle Communications Messaging Exchange Server 7u4-19.01 64bit (built Sep 7 2010)) with ESMTP id <0LOD002VDQ6F5O80@mailout2.samsung.com> for linux-arm-kernel@lists.infradead.org; Fri, 15 Jul 2011 23:42:25 +0900 (KST) X-AuditID: cbfee61b-b7c3dae000002cb8-9f-4e2051d14a71 Received: from epmmp1 ( [203.254.227.16]) by epcpsbgm2.samsung.com (MMPCPMTA) with SMTP id C3.59.11448.1D1502E4; Fri, 15 Jul 2011 23:42:25 +0900 (KST) Received: from banajit.sisodomain.com ([107.108.83.226]) by mmp1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0LOD00F3JQ6EZC@mmp1.samsung.com> for linux-arm-kernel@lists.infradead.org; Fri, 15 Jul 2011 23:42:24 +0900 (KST) Date: Fri, 15 Jul 2011 20:12:45 +0530 From: Banajit Goswami Subject: [PATCH 5/8] ARM: S5PC100: Add PWM backlight support on Samsung SMDKC100 board In-reply-to: <1310740968-26722-1-git-send-email-banajit.g@samsung.com> To: linux-samsung-soc@vger.kernel.org Message-id: <1310740968-26722-6-git-send-email-banajit.g@samsung.com> X-Mailer: git-send-email 1.7.2.3 References: <1310740968-26722-1-git-send-email-banajit.g@samsung.com> X-Brightmail-Tracker: AAAAAA== X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110715_104241_531877_8AC13AAE X-CRM114-Status: GOOD ( 17.68 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [203.254.224.25 listed in list.dnswl.org] 0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: jg1.han@samsung.com, kgene.kim@samsung.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Fri, 15 Jul 2011 18:26:13 +0000 (UTC) This patch adds support for LCD backlight using PWM timer for Samsung SMDKC100 board. Signed-off-by: Banajit Goswami --- arch/arm/mach-s5pc100/Kconfig | 1 + arch/arm/mach-s5pc100/mach-smdkc100.c | 55 ++++++++------------------------ 2 files changed, 15 insertions(+), 41 deletions(-) diff --git a/arch/arm/mach-s5pc100/Kconfig b/arch/arm/mach-s5pc100/Kconfig index 608722f..e8a33c4 100644 --- a/arch/arm/mach-s5pc100/Kconfig +++ b/arch/arm/mach-s5pc100/Kconfig @@ -56,6 +56,7 @@ config MACH_SMDKC100 select S3C_DEV_RTC select S3C_DEV_WDT select SAMSUNG_DEV_ADC + select SAMSUNG_DEV_BACKLIGHT select SAMSUNG_DEV_IDE select SAMSUNG_DEV_KEYPAD select SAMSUNG_DEV_PWM diff --git a/arch/arm/mach-s5pc100/mach-smdkc100.c b/arch/arm/mach-s5pc100/mach-smdkc100.c index 0525cb3..c89d6ec 100644 --- a/arch/arm/mach-s5pc100/mach-smdkc100.c +++ b/arch/arm/mach-s5pc100/mach-smdkc100.c @@ -51,6 +51,7 @@ #include #include #include +#include /* Following are default values for UCON, ULCON and UFCON UART registers */ #define SMDKC100_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \ @@ -179,45 +180,6 @@ static struct samsung_keypad_platdata smdkc100_keypad_data __initdata = { .cols = 8, }; -static int smdkc100_backlight_init(struct device *dev) -{ - int ret; - - ret = gpio_request(S5PC100_GPD(0), "Backlight"); - if (ret) { - printk(KERN_ERR "failed to request GPF for PWM-OUT0\n"); - return ret; - } - - /* Configure GPIO pin with S5PC100_GPD_TOUT_0 */ - s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_SFN(2)); - - return 0; -} - -static void smdkc100_backlight_exit(struct device *dev) -{ - s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_OUTPUT); - gpio_free(S5PC100_GPD(0)); -} - -static struct platform_pwm_backlight_data smdkc100_backlight_data = { - .pwm_id = 0, - .max_brightness = 255, - .dft_brightness = 255, - .pwm_period_ns = 78770, - .init = smdkc100_backlight_init, - .exit = smdkc100_backlight_exit, -}; - -static struct platform_device smdkc100_backlight_device = { - .name = "pwm-backlight", - .dev = { - .parent = &s3c_device_timer[0].dev, - .platform_data = &smdkc100_backlight_data, - }, -}; - static struct platform_device *smdkc100_devices[] __initdata = { &s3c_device_adc, &s3c_device_cfcon, @@ -239,8 +201,6 @@ static struct platform_device *smdkc100_devices[] __initdata = { &s5p_device_fimc1, &s5p_device_fimc2, &s5pc100_device_spdif, - &s3c_device_timer[0], - &smdkc100_backlight_device, }; static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { @@ -249,6 +209,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = { .oversampling_shift = 2, }; +/* LCD Backlight data */ +static struct samsung_bl_gpio_info smdkc100_bl_gpio_info = { + .no = S5PC100_GPD(0), + .func = S3C_GPIO_SFN(2), +}; + +static struct platform_pwm_backlight_data smdkc100_bl_data = { + .pwm_id = 0, +}; + static void __init smdkc100_map_io(void) { s5p_init_io(NULL, 0, S5P_VA_CHIPID); @@ -276,6 +246,9 @@ static void __init smdkc100_machine_init(void) /* LCD init */ gpio_request(S5PC100_GPH0(6), "GPH0"); smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0); + + samsung_bl_set(&smdkc100_bl_gpio_info, &smdkc100_bl_data); + platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices)); }