[ARM PATCH] 1868/1: support for LEDs on Mainstone

Patch from Nicolas Pitre

arch/arm/Kconfig

@@ -539,7 +539,7 @@ config CMDLINE
 
 config LEDS
 	bool "Timer and CPU usage LEDs"
-	depends on ARCH_NETWINDER || ARCH_EBSA110 || ARCH_EBSA285 || ARCH_FTVPCI || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_CDB89712 || ARCH_P720T || ARCH_OMAP || ARCH_VERSATILE_PB
+	depends on ARCH_NETWINDER || ARCH_EBSA110 || ARCH_EBSA285 || ARCH_FTVPCI || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_CDB89712 || ARCH_P720T || ARCH_OMAP || ARCH_VERSATILE_PB
 	help
 	  If you say Y here, the LEDs on your machine will be used
 	  to provide useful information about your current system status.
@@ -552,8 +552,8 @@ config LEDS
 	  system, but the driver will do nothing.
 
 config LEDS_TIMER
-	bool "Timer LED" if LEDS && (ARCH_NETWINDER || ARCH_EBSA285 || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_P720T || ARCH_VERSATILE_PB)
-	depends on ARCH_NETWINDER || ARCH_EBSA110 || ARCH_EBSA285 || ARCH_FTVPCI || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_CDB89712 || ARCH_P720T || ARCH_OMAP || ARCH_VERSATILE_PB
+	bool "Timer LED" if LEDS && (ARCH_NETWINDER || ARCH_EBSA285 || ARCH_SHARK || MACH_MAINSTONE || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_P720T || ARCH_VERSATILE_PB)
+	depends on ARCH_NETWINDER || ARCH_EBSA110 || ARCH_EBSA285 || ARCH_FTVPCI || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_CDB89712 || ARCH_P720T || ARCH_OMAP || ARCH_VERSATILE_PB
 	default y if ARCH_EBSA110
 	help
 	  If you say Y here, one of the system LEDs (the green one on the
@@ -568,7 +568,7 @@ config LEDS_TIMER
 
 config LEDS_CPU
 	bool "CPU usage LED"
-	depends on LEDS && (ARCH_NETWINDER || ARCH_EBSA285 || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_P720T || ARCH_VERSATILE_PB)
+	depends on LEDS && (ARCH_NETWINDER || ARCH_EBSA285 || ARCH_SHARK || ARCH_CO285 || ARCH_SA1100 || ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_PXA_IDP || ARCH_INTEGRATOR || ARCH_P720T || ARCH_VERSATILE_PB)
 	help
 	  If you say Y here, the red LED will be used to give a good real
 	  time indication of CPU usage, by lighting whenever the idle task

arch/arm/mach-pxa/Makefile

@@ -15,6 +15,7 @@ obj-$(CONFIG_ARCH_PXA_IDP) += idp.o
 # Support for blinky lights
 led-y := leds.o
 led-$(CONFIG_ARCH_LUBBOCK) += leds-lubbock.o
+led-$(CONFIG_MACH_MAINSTONE) += leds-mainstone.o
 led-$(CONFIG_ARCH_PXA_IDP) += leds-idp.o
 
 obj-$(CONFIG_LEDS) += $(led-y)

arch/arm/mach-pxa/leds-mainstone.c

+/*
+ * linux/arch/arm/mach-pxa/leds-mainstone.c
+ *
+ * Author:     Nicolas Pitre
+ * Created:    Nov 05, 2002
+ * Copyright:  MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+
+#include "leds.h"
+
+
+/* 8 discrete leds available for general use: */
+#define D28			(1 << 0)
+#define D27			(1 << 1)
+#define D26			(1 << 2)
+#define D25			(1 << 3)
+#define D24			(1 << 4)
+#define D23			(1 << 5)
+#define D22			(1 << 6)
+#define D21			(1 << 7)
+
+#define LED_STATE_ENABLED	1
+#define LED_STATE_CLAIMED	2
+
+static unsigned int led_state;
+static unsigned int hw_led_state;
+
+void mainstone_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	switch (evt) {
+	case led_start:
+		hw_led_state = 0;
+		led_state = LED_STATE_ENABLED;
+		break;
+
+	case led_stop:
+		led_state &= ~LED_STATE_ENABLED;
+		break;
+
+	case led_claim:
+		led_state |= LED_STATE_CLAIMED;
+		hw_led_state = 0;
+		break;
+
+	case led_release:
+		led_state &= ~LED_STATE_CLAIMED;
+		hw_led_state = 0;
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:
+		hw_led_state ^= D26;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		hw_led_state &= ~D27;
+		break;
+
+	case led_idle_end:
+		hw_led_state |= D27;
+		break;
+#endif
+
+	case led_halted:
+		break;
+
+	case led_green_on:
+		hw_led_state |= D21;;
+		break;
+
+	case led_green_off:
+		hw_led_state &= ~D21;
+		break;
+
+	case led_amber_on:
+		hw_led_state |= D22;;
+		break;
+
+	case led_amber_off:
+		hw_led_state &= ~D22;
+		break;
+
+	case led_red_on:
+		hw_led_state |= D23;;
+		break;
+
+	case led_red_off:
+		hw_led_state &= ~D23;
+		break;
+
+	default:
+		break;
+	}
+
+	if  (led_state & LED_STATE_ENABLED)
+		MST_LEDCTRL = (MST_LEDCTRL | 0xff) & ~hw_led_state;
+	else
+		MST_LEDCTRL |= 0xff;
+
+	local_irq_restore(flags);
+}

arch/arm/mach-pxa/leds.c

@@ -20,6 +20,8 @@ pxa_leds_init(void)
 {
 	if (machine_is_lubbock())
 		leds_event = lubbock_leds_event;
+	if (machine_is_mainstone())
+		leds_event = mainstone_leds_event;
 	if (machine_is_pxa_idp())
 		leds_event = idp_leds_event;
 

arch/arm/mach-pxa/leds.h

@@ -7,5 +7,6 @@
  *
  */
 
-extern void lubbock_leds_event(led_event_t evt);
 extern void idp_leds_event(led_event_t evt);
+extern void lubbock_leds_event(led_event_t evt);
+extern void mainstone_leds_event(led_event_t evt);