Merge pull request #1098 from notro/timer2708

BCM2708: Use brcm,bcm2835-system-timer

Author: pelwell

arch/arm/Kconfig

@@ -320,6 +320,8 @@ config ARCH_BCM2708
 	bool "Broadcom BCM2708 family"
 	select CPU_V6
 	select ARM_AMBA
+	select CLKSRC_MMIO
+	select CLKSRC_OF if OF
 	select HAVE_SCHED_CLOCK
 	select NEED_MACH_GPIO_H
 	select NEED_MACH_MEMORY_H

arch/arm/boot/dts/bcm2708.dtsi

@@ -12,6 +12,13 @@
 	soc {
 		ranges = <0x7e000000 0x20000000 0x01000000>;
 
+		timer@7e003000 {
+			compatible = "brcm,bcm2835-system-timer";
+			reg = <0x7e003000 0x1000>;
+			interrupts = <1 0>, <1 1>, <1 2>, <1 3>;
+			clock-frequency = <1000000>;
+		};
+
 		arm-pmu {
 			compatible = "arm,arm1176-pmu";
 		};

arch/arm/mach-bcm2708/bcm2708.c

@@ -843,7 +843,6 @@ static void __init bcm2708_dt_init(void)
 {
 	int ret;
 
-	of_clk_init(NULL);
 	ret = of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 	if (ret) {
 		pr_err("of_platform_populate failed: %d\n", ret);
@@ -1043,6 +1042,12 @@ static struct delay_timer bcm2708_delay_timer = {
 
 static void __init bcm2708_timer_init(void)
 {
+	if (of_have_populated_dt()) {
+		of_clk_init(NULL);
+		clocksource_of_init();
+		return;
+	}
+
 	/* init high res timer */
 	bcm2708_clocksource_init();
 

arch/arm/mach-bcm2708/include/mach/platform.h

@@ -183,7 +183,6 @@
 #define MAXIRQNUM                      (32 + 32 + 20)
 #define MAXFIQNUM                      (32 + 32 + 20)
 
-#define MAX_TIMER                       2
 #define MAX_PERIOD                      699050
 #define TICKS_PER_uSEC                  1
 

drivers/clocksource/Makefile

@@ -19,7 +19,7 @@ obj-$(CONFIG_CLKSRC_NOMADIK_MTU)	+= nomadik-mtu.o
 obj-$(CONFIG_CLKSRC_DBX500_PRCMU)	+= clksrc-dbx500-prcmu.o
 obj-$(CONFIG_ARMADA_370_XP_TIMER)	+= time-armada-370-xp.o
 obj-$(CONFIG_ORION_TIMER)	+= time-orion.o
-obj-$(CONFIG_ARCH_BCM2835)	+= bcm2835_timer.o
+obj-$(CONFIG_ARCH_BCM2835)$(CONFIG_ARCH_BCM2708)	+= bcm2835_timer.o
 obj-$(CONFIG_ARCH_CLPS711X)	+= clps711x-timer.o
 obj-$(CONFIG_ARCH_ATLAS7)	+= timer-atlas7.o
 obj-$(CONFIG_ARCH_MOXART)	+= moxart_timer.o