From patchwork Fri Aug 26 09:03:26 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan Wu X-Patchwork-Id: 1101492 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 p7Q98ZoY013533 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 26 Aug 2011 09:08:56 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QwsNy-0002dh-HU; Fri, 26 Aug 2011 09:07:37 +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 1QwsNw-0002nJ-4j; Fri, 26 Aug 2011 09:07:32 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QwsNs-0002mO-CH for linux-arm-kernel@lists.infradead.org; Fri, 26 Aug 2011 09:07:29 +0000 Received: from [222.65.189.197] (helo=canonical.com) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1QwsNi-0004ip-Ta; Fri, 26 Aug 2011 09:07:24 +0000 From: Bryan Wu To: linux@arm.linux.org.uk, linus.walleij@linaro.org, rpurdie@rpsys.net, tony@atomide.com, jochen@scram.de, linux@maxim.org.za, nicolas.pitre@linaro.org, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, jamie@jamieiles.com, linux-kernel@vger.kernel.org Subject: [PATCH 09/18] mach-integrator: retire custom LED code Date: Fri, 26 Aug 2011 17:03:26 +0800 Message-Id: <1314349415-889-10-git-send-email-bryan.wu@canonical.com> X-Mailer: git-send-email 1.7.5 In-Reply-To: <1314349415-889-1-git-send-email-bryan.wu@canonical.com> References: <1314349415-889-1-git-send-email-bryan.wu@canonical.com> X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110826_050728_648686_864511B3 X-CRM114-Status: GOOD ( 19.86 ) X-Spam-Score: 0.5 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (0.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [91.189.89.112 listed in list.dnswl.org] 1.8 URIBL_BLACK Contains an URL listed in the URIBL blacklist [URIs: cdev.name] -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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, 26 Aug 2011 09:08:56 +0000 (UTC) Use the LED in core module for CPU activity and also enable 4 debugging LEDs in baseboard. The CPU activity LED is now handled by the trigger in the leds subsystem, retire this old CONFIG_LEDS-based code. Signed-off-by: Bryan Wu --- arch/arm/mach-integrator/Makefile | 3 +- arch/arm/mach-integrator/core.c | 1 - arch/arm/mach-integrator/leds.c | 159 ++++++++++++++++++++++--------------- 3 files changed, 96 insertions(+), 67 deletions(-) diff --git a/arch/arm/mach-integrator/Makefile b/arch/arm/mach-integrator/Makefile index ebeef96..5521d18 100644 --- a/arch/arm/mach-integrator/Makefile +++ b/arch/arm/mach-integrator/Makefile @@ -4,11 +4,10 @@ # Object file lists. -obj-y := core.o lm.o +obj-y := core.o lm.o leds.o obj-$(CONFIG_ARCH_INTEGRATOR_AP) += integrator_ap.o obj-$(CONFIG_ARCH_INTEGRATOR_CP) += integrator_cp.o -obj-$(CONFIG_LEDS) += leds.o obj-$(CONFIG_PCI) += pci_v3.o pci.o obj-$(CONFIG_CPU_FREQ_INTEGRATOR) += cpu.o obj-$(CONFIG_INTEGRATOR_IMPD1) += impd1.o diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c index 3267cdd..f9c638d 100644 --- a/arch/arm/mach-integrator/core.c +++ b/arch/arm/mach-integrator/core.c @@ -28,7 +28,6 @@ #include #include #include -#include #include #include diff --git a/arch/arm/mach-integrator/leds.c b/arch/arm/mach-integrator/leds.c index 28be186..dab912b 100644 --- a/arch/arm/mach-integrator/leds.c +++ b/arch/arm/mach-integrator/leds.c @@ -1,91 +1,122 @@ /* - * linux/arch/arm/mach-integrator/leds.c + * Driver for the 4 user LEDs found on the Integrator AP/CP baseboard + * Based on Versatile and RealView machine LED code * - * Integrator/AP and Integrator/CP LED control routines - * - * Copyright (C) 1999 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * License terms: GNU General Public License (GPL) version 2 + * Author: Bryan Wu */ #include #include -#include -#include #include +#include +#include +#include #include #include -#include -#include -#include -#include -static int saved_leds; +#define ALPHA_REG __io_address(INTEGRATOR_DBG_BASE) +#define LEDREG (__io_address(INTEGRATOR_DBG_BASE) + INTEGRATOR_DBG_LEDS_OFFSET) + +struct integrator_led { + struct led_classdev cdev; + u8 mask; +}; + +/* + * The triggers lines up below will only be used if the + * LED triggers are compiled in. + */ +static const struct { + const char *name; + const char *trigger; +} integrator_leds[] = { + { "integrator:green0", "heartbeat", }, + { "integrator:yellow", }, + { "integrator:red", }, + { "integrator:green1", }, + { "integrator:core_module", "cpu0", }, +}; -static void integrator_leds_event(led_event_t ledevt) +static void integrator_led_set(struct led_classdev *cdev, + enum led_brightness b) { - unsigned long flags; - const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE); - unsigned int update_alpha_leds; + struct integrator_led *led = container_of(cdev, + struct integrator_led, cdev); + u32 reg = __raw_readl(LEDREG); - // yup, change the LEDs - local_irq_save(flags); - update_alpha_leds = 0; + if (b != LED_OFF) + reg |= led->mask; + else + reg &= ~led->mask; - switch(ledevt) { - case led_idle_start: - cm_control(CM_CTRL_LED, 0); - break; + while (__raw_readl(ALPHA_REG) & 1) + cpu_relax(); - case led_idle_end: - cm_control(CM_CTRL_LED, CM_CTRL_LED); - break; + __raw_writel(reg, LEDREG); +} - case led_timer: - saved_leds ^= GREEN_LED; - update_alpha_leds = 1; - break; +static enum led_brightness integrator_led_get(struct led_classdev *cdev) +{ + struct integrator_led *led = container_of(cdev, + struct integrator_led, cdev); + u32 reg = __raw_readl(LEDREG); - case led_red_on: - saved_leds |= RED_LED; - update_alpha_leds = 1; - break; + return (reg & led->mask) ? LED_FULL : LED_OFF; +} - case led_red_off: - saved_leds &= ~RED_LED; - update_alpha_leds = 1; - break; +static void cm_led_set(struct led_classdev *cdev, + enum led_brightness b) +{ + if (b != LED_OFF) + cm_control(CM_CTRL_LED, CM_CTRL_LED); + else + cm_control(CM_CTRL_LED, 0); +} - default: - break; - } +static enum led_brightness cm_led_get(struct led_classdev *cdev) +{ + u32 reg = readl(CM_CTRL); - if (update_alpha_leds) { - while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1); - __raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET); - } - local_irq_restore(flags); + return (reg & CM_CTRL_LED) ? LED_FULL : LED_OFF; } -static int __init leds_init(void) +static int __init integrator_leds_init(void) { - if (machine_is_integrator() || machine_is_cintegrator()) - leds_event = integrator_leds_event; + int i; + + for (i = 0; i < ARRAY_SIZE(integrator_leds); i++) { + struct integrator_led *led; + + led = kzalloc(sizeof(*led), GFP_KERNEL); + if (!led) + break; + + + led->cdev.name = integrator_leds[i].name; + + if (i == 4) { /* Setting for LED in core module */ + led->cdev.brightness_set = cm_led_set; + led->cdev.brightness_get = cm_led_get; + } else { + led->cdev.brightness_set = integrator_led_set; + led->cdev.brightness_get = integrator_led_get; + } + + led->cdev.default_trigger = integrator_leds[i].trigger; + led->mask = BIT(i); + + if (led_classdev_register(NULL, &led->cdev) < 0) { + kfree(led); + break; + } + } return 0; } -core_initcall(leds_init); +/* + * Since we may have triggers on any subsystem, defer registration + * until after subsystem_init. + */ +fs_initcall(integrator_leds_init);