Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758252Ab2EAPDO (ORCPT ); Tue, 1 May 2012 11:03:14 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:46234 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756851Ab2EAPDJ (ORCPT ); Tue, 1 May 2012 11:03:09 -0400 From: Bryan Wu To: linux@arm.linux.org.uk, rpurdie@rpsys.net, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linus.walleij@linaro.org, akpm@linux-foundation.org, arnd.bergmann@linaro.org, nicolas.pitre@linaro.org, tim.gardner@canonical.com Subject: [PATCH 09/19] ARM: mach-integrator: retire custom LED code Date: Tue, 1 May 2012 23:01:36 +0800 Message-Id: <1335884506-15370-10-git-send-email-bryan.wu@canonical.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1335884506-15370-1-git-send-email-bryan.wu@canonical.com> References: <1335884506-15370-1-git-send-email-bryan.wu@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6832 Lines: 240 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 | 158 ++++++++++++++++++++++--------------- 3 files changed, 96 insertions(+), 66 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 8c53562..0c7c4ef 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 466defa..dab912b 100644 --- a/arch/arm/mach-integrator/leds.c +++ b/arch/arm/mach-integrator/leds.c @@ -1,90 +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 -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); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/