[RFC PATCH 09/16] ARM: local timers: move ux500 to LOCAL_TIMER_DEVICES/ARM_SMP_TWD
Marc Zyngier
marc.zyngier at arm.com
Thu Jun 16 15:06:37 EDT 2011
Convert the ux500 platforms to use the new arm_smp_twd driver.
Add the platform device and register it as early platform device.
Cc: Srinidhi Kasagar <srinidhi.kasagar at stericsson.com>
Cc: Linus Walleij <linus.walleij at stericsson.com>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
arch/arm/mach-ux500/Kconfig | 2 ++
arch/arm/mach-ux500/Makefile | 1 -
arch/arm/mach-ux500/cpu-db5500.c | 1 -
arch/arm/mach-ux500/cpu-db8500.c | 1 -
arch/arm/mach-ux500/cpu.c | 38 +++++++++++++++++++++++++++++++++-----
arch/arm/mach-ux500/localtimer.c | 30 ------------------------------
6 files changed, 35 insertions(+), 38 deletions(-)
delete mode 100644 arch/arm/mach-ux500/localtimer.c
diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 96d546c..aa21fc0 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -5,6 +5,8 @@ config UX500_SOC_COMMON
default y
select ARM_GIC
select HAS_MTU
+ select LOCAL_TIMER_DEVICES
+ select ARM_SMP_TWD
select ARM_ERRATA_753970
menu "Ux500 SoC"
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 1694916..2e30a80 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -14,7 +14,6 @@ obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \
obj-$(CONFIG_MACH_U5500) += board-u5500.o board-u5500-sdi.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
obj-$(CONFIG_U5500_MODEM_IRQ) += modem-irq-db5500.o
obj-$(CONFIG_U5500_MBOX) += mbox-db5500.o
diff --git a/arch/arm/mach-ux500/cpu-db5500.c b/arch/arm/mach-ux500/cpu-db5500.c
index 22705d2..63eaa98 100644
--- a/arch/arm/mach-ux500/cpu-db5500.c
+++ b/arch/arm/mach-ux500/cpu-db5500.c
@@ -33,7 +33,6 @@ static struct map_desc u5500_io_desc[] __initdata = {
__IO_DEV_DESC(U5500_GIC_CPU_BASE, SZ_4K),
__IO_DEV_DESC(U5500_GIC_DIST_BASE, SZ_4K),
__IO_DEV_DESC(U5500_L2CC_BASE, SZ_4K),
- __IO_DEV_DESC(U5500_TWD_BASE, SZ_4K),
__IO_DEV_DESC(U5500_MTU0_BASE, SZ_4K),
__IO_DEV_DESC(U5500_SCU_BASE, SZ_4K),
__IO_DEV_DESC(U5500_BACKUPRAM0_BASE, SZ_8K),
diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c
index 4598b06..dfad7c8 100644
--- a/arch/arm/mach-ux500/cpu-db8500.c
+++ b/arch/arm/mach-ux500/cpu-db8500.c
@@ -38,7 +38,6 @@ static struct map_desc u8500_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_GIC_CPU_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
- __IO_DEV_DESC(U8500_TWD_BASE, SZ_4K),
__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index 1da23bb..1dac06f 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -15,7 +15,6 @@
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/mach/map.h>
-#include <asm/localtimer.h>
#include <plat/mtu.h>
#include <mach/hardware.h>
@@ -120,17 +119,44 @@ static int ux500_l2x0_init(void)
early_initcall(ux500_l2x0_init);
#endif
+static struct resource ux500_twd_resources[] = {
+ {
+ .start = 0,
+ .end = 0x10,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IRQ_LOCALTIMER,
+ .end = IRQ_LOCALTIMER,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device ux500_twd_device = {
+ .name = "arm_smp_twd",
+ .id = -1,
+ .resource = ux500_twd_resources,
+ .num_resources = ARRAY_SIZE(ux500_twd_resources),
+};
+
+static struct platform_device *ux500_early_devices[] = {
+ &ux500_twd_device,
+};
+
static void __init ux500_timer_init(void)
{
-#ifdef CONFIG_LOCAL_TIMERS
+ unsigned long iobase = 0;
/* Setup the local timer base */
if (cpu_is_u5500())
- twd_base = __io_address(U5500_TWD_BASE);
+ iobase = U5500_TWD_BASE;
else if (cpu_is_u8500())
- twd_base = __io_address(U8500_TWD_BASE);
+ iobase = U8500_TWD_BASE;
else
ux500_unknown_soc();
-#endif
+
+ ux500_twd_resources[0].start += iobase;
+ ux500_twd_resources[0].end += iobase;
+
if (cpu_is_u5500())
mtu_base = __io_address(U5500_MTU0_BASE);
else if (cpu_is_u8500ed())
@@ -141,6 +167,8 @@ static void __init ux500_timer_init(void)
ux500_unknown_soc();
nmdk_timer_init();
+ early_platform_add_devices(ux500_early_devices,
+ ARRAY_SIZE(ux500_early_devices));
}
struct sys_timer ux500_timer = {
diff --git a/arch/arm/mach-ux500/localtimer.c b/arch/arm/mach-ux500/localtimer.c
deleted file mode 100644
index f027cef..0000000
--- a/arch/arm/mach-ux500/localtimer.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2008-2009 ST-Ericsson
- * Srinidhi Kasagar <srinidhi.kasagar at stericsson.com>
- *
- * This file is heavily based on relaview platform, almost a copy.
- *
- * Copyright (C) 2002 ARM Ltd.
- *
- * 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>
-#include <asm/hardware/gic.h>
-
-/*
- * Setup the local clock events for a CPU.
- */
-int __cpuinit local_timer_setup(struct clock_event_device *evt)
-{
- evt->irq = gic_ppi_to_vppi(IRQ_LOCALTIMER);
- twd_timer_setup(evt);
- return 0;
-}
--
1.7.0.4
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