Convert the Tegra-2 platforms to the standalone version
of smp_twd.c. Since the timer calibration code requires another
timer to be up and running, the actual initialisation is left
to the late_timer_init hook.
Tested on Harmony.
Cc: Colin Cross <ccross at android.com>
Cc: Erik Gilling <konkers at android.com>
Cc: Olof Johansson <olof at lixom.net>
Cc: Stephen Warren <swarren at nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
arch/arm/mach-tegra/Kconfig | 1 +
arch/arm/mach-tegra/Makefile | 2 +-
arch/arm/mach-tegra/localtimer.c | 26 --------------------------
arch/arm/mach-tegra/timer.c | 34 +++++++++++++++++++++++++++++-----
4 files changed, 31 insertions(+), 32 deletions(-)
delete mode 100644 arch/arm/mach-tegra/localtimer.c
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 373652d..f93aa6aa 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -6,6 +6,7 @@ config ARCH_TEGRA_2x_SOC
bool "Enable support for Tegra20 family"
select CPU_V7
select ARM_GIC
+ select ARM_SMP_TWD
select ARCH_REQUIRE_GPIOLIB
select USB_ARCH_HAS_EHCI if USB_SUPPORT
select USB_ULPI if USB_SUPPORT
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index e120ff5..f7d0443 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pinmux-tegra20-tables.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pinmux-tegra30-tables.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += board-dt-tegra30.o
-obj-$(CONFIG_SMP) += platsmp.o localtimer.o headsmp.o
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_TEGRA_SYSTEM_DMA) += dma.o
obj-$(CONFIG_CPU_FREQ) += cpu-tegra.o
diff --git a/arch/arm/mach-tegra/localtimer.c b/arch/arm/mach-tegra/localtimer.c
deleted file mode 100644
index e91d681..0000000
--- a/arch/arm/mach-tegra/localtimer.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * arch/arm/mach-tegra/localtimer.c
- *
- * Copyright (C) 2002 ARM Ltd.
- * All Rights Reserved
- *
- * 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/init.h>
-#include <linux/smp.h>
-#include <linux/clockchips.h>
-#include <asm/irq.h>
-#include <asm/smp_twd.h>
-#include <asm/localtimer.h>
-
-/*
- * Setup the local clock events for a CPU.
- */
-int __cpuinit local_timer_setup(struct clock_event_device *evt)
-{
- evt->irq = IRQ_LOCALTIMER;
- twd_timer_setup(evt);
- return 0;
-}
diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
index 6366654..0c537b9 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/arch/arm/mach-tegra/timer.c
@@ -27,9 +27,10 @@
#include <linux/clocksource.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/ioport.h>
#include <asm/mach/time.h>
-#include <asm/localtimer.h>
+#include <asm/smp_twd.h>
#include <asm/sched_clock.h>
#include <mach/iomap.h>
@@ -179,6 +180,31 @@ static struct irqaction tegra_timer_irq = {
.irq = INT_TMR3,
};
+#ifdef CONFIG_ARM_SMP_TWD
+static struct resource tegra_twd_resources[] __initdata = {
+ {
+ .start = TEGRA_ARM_PERIF_BASE + 0x600,
+ .end = TEGRA_ARM_PERIF_BASE + 0x610,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_LOCALTIMER,
+ .end = IRQ_LOCALTIMER,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static void __init tegra_twd_init(void)
+{
+ int err = twd_timer_register(tegra_twd_resources,
+ ARRAY_SIZE(tegra_twd_resources));
+ if (err)
+ pr_err("twd_timer_register failed %d\n", err);
+}
+#else
+#define tegra_twd_init NULL
+#endif
+
static void __init tegra_init_timer(void)
{
struct clk *clk;
@@ -205,10 +231,6 @@ static void __init tegra_init_timer(void)
else
clk_enable(clk);
-#ifdef CONFIG_HAVE_ARM_TWD
- twd_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x600);
-#endif
-
switch (rate) {
case 12000000:
timer_writel(0x000b, TIMERUS_USEC_CFG);
@@ -249,6 +271,8 @@ static void __init tegra_init_timer(void)
tegra_clockevent.cpumask = cpu_all_mask;
tegra_clockevent.irq = tegra_timer_irq.irq;
clockevents_register_device(&tegra_clockevent);
+
+ late_time_init = tegra_twd_init;
}
struct sys_timer tegra_timer = {
--
1.7.7.1