sh: heartbeat consolidation for banked LEDs.

This consolidates the various board heartbeat LED implementations,
used for strobing the load average across a LED bank. Those boards
not implementing a full bank can hook in via the LED class.

We leave the compat hook in the machvec for now until those non-banked
boards are able to migrate to the drivers/leds.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/mpc1211/Makefile

@@ -2,7 +2,7 @@
 # Makefile for the Interface (CTP/PCI/MPC-SH02) specific parts of the kernel
 #
 
-obj-y	 := setup.o rtc.o led.o
+obj-y	 := setup.o rtc.o
 
 obj-$(CONFIG_PCI) += pci.o
 

arch/sh/boards/mpc1211/led.c

@@ -1,63 +0,0 @@
-/*
- * linux/arch/sh/boards/mpc1211/led.c
- *
- * Copyright (C) 2001  Saito.K & Jeanne
- *
- * This file contains Interface MPC-1211 specific LED code.
- */
-
-
-static void mach_led(int position, int value)
-{
-	volatile unsigned char* p = (volatile unsigned char*)0xa2000000;
-
-	if (value) {
-		*p |= 1;
-	} else {
-		*p &= ~1;
-	}
-}
-
-#ifdef CONFIG_HEARTBEAT
-
-#include <linux/sched.h>
-
-/* Cycle the LED's in the clasic Knightrider/Sun pattern */
-void heartbeat_mpc1211(void)
-{
-	static unsigned int cnt = 0, period = 0;
-	volatile unsigned char* p = (volatile unsigned char*)0xa2000000;
-	static unsigned bit = 0, up = 1;
-
-	cnt += 1;
-	if (cnt < period) {
-		return;
-	}
-
-	cnt = 0;
-
-	/* Go through the points (roughly!):
-	 * f(0)=10, f(1)=16, f(2)=20, f(5)=35,f(inf)->110
-	 */
-	period = 110 - ( (300<<FSHIFT)/
-			 ((avenrun[0]/5) + (3<<FSHIFT)) );
-
-	if (up) {
-		if (bit == 7) {
-			bit--;
-			up=0;
-		} else {
-			bit ++;
-		}
-	} else {
-		if (bit == 0) {
-			bit++;
-			up=1;
-		} else {
-			bit--;
-		}
-	}
-	*p = 1<<bit;
-
-}
-#endif /* CONFIG_HEARTBEAT */

arch/sh/boards/mpc1211/setup.c

@@ -10,6 +10,7 @@
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/interrupt.h>
+#include <linux/platform_device.h>
 #include <asm/io.h>
 #include <asm/machvec.h>
 #include <asm/mpc1211/mpc1211.h>
@@ -281,6 +282,32 @@ static int put_smb_blk(unsigned char *p, int address, int command, int no)
 	return 0;
 }
 
+static struct resource heartbeat_resources[] = {
+	[0] = {
+		.start	= 0xa2000000,
+		.end	= 0xa2000000 + 8 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device heartbeat_device = {
+	.name		= "heartbeat",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(heartbeat_resources),
+	.resource	= heartbeat_resources,
+};
+
+static struct platform_device *mpc1211_devices[] __initdata = {
+	&heartbeat_device,
+};
+
+static int __init mpc1211_devices_setup(void)
+{
+	return platform_add_devices(mpc1211_devices,
+				    ARRAY_SIZE(mpc1211_devices));
+}
+__initcall(mpc1211_devices_setup);
+
 /* arch/sh/boards/mpc1211/rtc.c */
 void mpc1211_time_init(void);
 
@@ -317,9 +344,5 @@ struct sh_machine_vector mv_mpc1211 __initmv = {
 	.mv_nr_irqs		= 48,
 	.mv_irq_demux		= mpc1211_irq_demux,
 	.mv_init_irq		= init_mpc1211_IRQ,
-
-#ifdef CONFIG_HEARTBEAT
-	.mv_heartbeat		= heartbeat_mpc1211,
-#endif
 };
 ALIAS_MV(mpc1211)