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Merge branch 'sched_clock-for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into devel-stable

This commit is contained in:
Russell King 2012-02-04 10:32:18 +00:00
parent bea15fd77f 6905a65879
commit 0355e2ff44
7 changed files with 19 additions and 55 deletions
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16
arch/arm/Kconfig
View File

@ -51,9 +51,6 @@ config MIGHT_HAVE_PCI
config SYS_SUPPORTS_APM_EMULATION
bool
config HAVE_SCHED_CLOCK
bool
config GENERIC_GPIO
bool
@ -438,7 +435,6 @@ config ARCH_MXC
select CLKDEV_LOOKUP
select CLKSRC_MMIO
select GENERIC_IRQ_CHIP
select HAVE_SCHED_CLOCK
select MULTI_IRQ_HANDLER
help
Support for Freescale MXC/iMX-based family of processors
@ -530,7 +526,6 @@ config ARCH_IXP4XX
select CPU_XSCALE
select GENERIC_GPIO
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select MIGHT_HAVE_PCI
select DMABOUNCE if PCI
help
@ -601,7 +596,6 @@ config ARCH_MMP
select CLKDEV_LOOKUP
select GENERIC_CLOCKEVENTS
select GPIO_PXA
select HAVE_SCHED_CLOCK
select TICK_ONESHOT
select PLAT_PXA
select SPARSE_IRQ
@ -642,7 +636,6 @@ config ARCH_TEGRA
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select HAVE_CLK
select HAVE_SCHED_CLOCK
select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select ARCH_HAS_CPUFREQ
@ -659,7 +652,6 @@ config ARCH_PICOXCELL
select DW_APB_TIMER
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select HAVE_SCHED_CLOCK
select HAVE_TCM
select NO_IOPORT
select SPARSE_IRQ
@ -687,7 +679,6 @@ config ARCH_PXA
select ARCH_REQUIRE_GPIOLIB
select GENERIC_CLOCKEVENTS
select GPIO_PXA
select HAVE_SCHED_CLOCK
select TICK_ONESHOT
select PLAT_PXA
select SPARSE_IRQ
@ -755,7 +746,6 @@ config ARCH_SA1100
select CPU_FREQ
select GENERIC_CLOCKEVENTS
select CLKDEV_LOOKUP
select HAVE_SCHED_CLOCK
select TICK_ONESHOT
select ARCH_REQUIRE_GPIOLIB
select HAVE_IDE
@ -812,7 +802,6 @@ config ARCH_S5P64X0
select CLKSRC_MMIO
select HAVE_S3C2410_WATCHDOG if WATCHDOG
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C_RTC if RTC_CLASS
help
@ -845,7 +834,6 @@ config ARCH_S5PV210
select ARM_L1_CACHE_SHIFT_6
select ARCH_HAS_CPUFREQ
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select HAVE_S3C2410_I2C if I2C
select HAVE_S3C_RTC if RTC_CLASS
select HAVE_S3C2410_WATCHDOG if WATCHDOG
@ -888,7 +876,6 @@ config ARCH_U300
depends on MMU
select CLKSRC_MMIO
select CPU_ARM926T
select HAVE_SCHED_CLOCK
select HAVE_TCM
select ARM_AMBA
select ARM_PATCH_PHYS_VIRT
@ -946,7 +933,6 @@ config ARCH_OMAP
select ARCH_HAS_CPUFREQ
select CLKSRC_MMIO
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select ARCH_HAS_HOLES_MEMORYMODEL
help
Support for TI's OMAP platform (OMAP1/2/3/4).
@ -1112,13 +1098,11 @@ config ARCH_ACORN
config PLAT_IOP
bool
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
config PLAT_ORION
bool
select CLKSRC_MMIO
select GENERIC_IRQ_CHIP
select HAVE_SCHED_CLOCK
config PLAT_PXA
bool

5
arch/arm/kernel/Makefile
View File

@ -14,8 +14,8 @@ CFLAGS_REMOVE_return_address.o = -pg
# Object file lists.
obj-y := elf.o entry-armv.o entry-common.o irq.o opcodes.o \
process.o ptrace.o return_address.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
process.o ptrace.o return_address.o sched_clock.o \
setup.o signal.o stacktrace.o sys_arm.o time.o traps.o
obj-$(CONFIG_DEPRECATED_PARAM_STRUCT) += compat.o
@ -30,7 +30,6 @@ obj-$(CONFIG_ARTHUR) += arthur.o
obj-$(CONFIG_ISA_DMA) += dma-isa.o
obj-$(CONFIG_PCI) += bios32.o isa.o
obj-$(CONFIG_ARM_CPU_SUSPEND) += sleep.o suspend.o
obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o
obj-$(CONFIG_SMP) += smp.o smp_tlb.o
obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o
obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o

2
arch/arm/kernel/time.c
View File

@ -147,8 +147,6 @@ void __init time_init(void)
{
system_timer = machine_desc->timer;
system_timer->init();
#ifdef CONFIG_HAVE_SCHED_CLOCK
sched_clock_postinit();
#endif
}

28
arch/arm/mach-davinci/time.c
View File

@ -19,11 +19,14 @@
#include <linux/err.h>
#include <linux/platform_device.h>
#include <mach/hardware.h>
#include <asm/sched_clock.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <mach/cputype.h>
#include <mach/hardware.h>
#include <mach/time.h>
#include "clock.h"
static struct clock_event_device clockevent_davinci;
@ -272,19 +275,9 @@ static cycle_t read_cycles(struct clocksource *cs)
return (cycles_t)timer32_read(t);
}
/*
* Kernel assumes that sched_clock can be called early but may not have
* things ready yet.
*/
static cycle_t read_dummy(struct clocksource *cs)
{
return 0;
}
static struct clocksource clocksource_davinci = {
.rating = 300,
.read = read_dummy,
.read = read_cycles,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@ -292,12 +285,9 @@ static struct clocksource clocksource_davinci = {
/*
* Overwrite weak default sched_clock with something more precise
*/
unsigned long long notrace sched_clock(void)
static u32 notrace davinci_read_sched_clock(void)
{
const cycle_t cyc = clocksource_davinci.read(&clocksource_davinci);
return clocksource_cyc2ns(cyc, clocksource_davinci.mult,
clocksource_davinci.shift);
return timer32_read(&timers[TID_CLOCKSOURCE]);
}
/*
@ -397,12 +387,14 @@ static void __init davinci_timer_init(void)
davinci_clock_tick_rate = clk_get_rate(timer_clk);
/* setup clocksource */
clocksource_davinci.read = read_cycles;
clocksource_davinci.name = id_to_name[clocksource_id];
if (clocksource_register_hz(&clocksource_davinci,
davinci_clock_tick_rate))
printk(err, clocksource_davinci.name);
setup_sched_clock(davinci_read_sched_clock, 32,
davinci_clock_tick_rate);
/* setup clockevent */
clockevent_davinci.name = id_to_name[timers[TID_CLOCKEVENT].id];
clockevent_davinci.mult = div_sc(davinci_clock_tick_rate, NSEC_PER_SEC,

21
arch/arm/mach-prima2/timer.c
View File

@ -18,6 +18,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <mach/map.h>
#include <asm/sched_clock.h>
#include <asm/mach/time.h>
#define SIRFSOC_TIMER_COUNTER_LO 0x0000
@ -165,21 +166,9 @@ static struct irqaction sirfsoc_timer_irq = {
};
/* Overwrite weak default sched_clock with more precise one */
unsigned long long notrace sched_clock(void)
static u32 notrace sirfsoc_read_sched_clock(void)
{
static int is_mapped;
/*
* sched_clock is called earlier than .init of sys_timer
* if we map timer memory in .init of sys_timer, system
* will panic due to illegal memory access
*/
if (!is_mapped) {
sirfsoc_of_timer_map();
is_mapped = 1;
}
return sirfsoc_timer_read(NULL) * (NSEC_PER_SEC / CLOCK_TICK_RATE);
return (u32)(sirfsoc_timer_read(NULL) & 0xffffffff);
}
static void __init sirfsoc_clockevent_init(void)
@ -210,6 +199,8 @@ static void __init sirfsoc_timer_init(void)
BUG_ON(rate < CLOCK_TICK_RATE);
BUG_ON(rate % CLOCK_TICK_RATE);
sirfsoc_of_timer_map();
writel_relaxed(rate / CLOCK_TICK_RATE / 2 - 1, sirfsoc_timer_base + SIRFSOC_TIMER_DIV);
writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_LO);
writel_relaxed(0, sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
@ -217,6 +208,8 @@ static void __init sirfsoc_timer_init(void)
BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE));
setup_sched_clock(sirfsoc_read_sched_clock, 32, CLOCK_TICK_RATE);
BUG_ON(setup_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq));
sirfsoc_clockevent_init();

1
arch/arm/plat-nomadik/Kconfig
View File

@ -23,7 +23,6 @@ config HAS_MTU
config NOMADIK_MTU_SCHED_CLOCK
bool
depends on HAS_MTU
select HAVE_SCHED_CLOCK
help
Use the Multi Timer Unit as the sched_clock.

1
arch/arm/plat-versatile/Kconfig
View File

@ -12,6 +12,5 @@ config PLAT_VERSATILE_LEDS
config PLAT_VERSATILE_SCHED_CLOCK
def_bool y if !ARCH_INTEGRATOR_AP
select HAVE_SCHED_CLOCK
endif