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Merge branch 'ux500-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/soc 

* 'ux500-timers' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  ARM: plat-nomadik: modernize MTU timer
  ARM: plat-nomadik: handle clocking properly
  ARM: plat-nomadik: get rid of global mtu base pointer
This commit is contained in:
Olof Johansson 2012-02-07 15:13:50 -08:00
parent a5f17d1f4c a3b86a6d6f
commit afd96f8335
6 changed files with 15 additions and 58 deletions
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7
arch/arm/mach-nomadik/board-nhk8815.c
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@ -27,11 +27,11 @@
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>
#include <plat/gpio-nomadik.h>
#include <plat/mtu.h>
#include <mach/setup.h>
#include <mach/nand.h>
#include <mach/fsmc.h>
@ -246,10 +246,7 @@ static void __init nomadik_timer_init(void)
src_cr |= SRC_CR_INIT_VAL;
writel(src_cr, io_p2v(NOMADIK_SRC_BASE));
/* Save global pointer to mtu, used by platform timer code */
mtu_base = io_p2v(NOMADIK_MTU0_BASE);
nmdk_timer_init();
nmdk_timer_init(io_p2v(NOMADIK_MTU0_BASE));
}
static struct sys_timer nomadik_timer = {

19
arch/arm/mach-nomadik/include/mach/setup.h
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@ -1,19 +0,0 @@
/*
* These symbols are needed for board-specific files to call their
* own cpu-specific files
*/
#ifndef __ASM_ARCH_SETUP_H
#define __ASM_ARCH_SETUP_H
#include <asm/mach/time.h>
#include <linux/init.h>
#ifdef CONFIG_NOMADIK_8815
extern void nmdk_timer_init(void);
#endif /* NOMADIK_8815 */
#endif /* __ASM_ARCH_SETUP_H */

3
arch/arm/mach-ux500/include/mach/setup.h
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@ -27,9 +27,6 @@ extern void __init u5500_sdi_init(void);
extern void __init db5500_dma_init(void);
/* We re-use nomadik_timer for this platform */
extern void nmdk_timer_init(void);
struct amba_device;
extern void __init amba_add_devices(struct amba_device *devs[], int num);

7
arch/arm/mach-ux500/timer.c
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@ -17,19 +17,20 @@
static void __init ux500_timer_init(void)
{
void __iomem *mtu_timer_base;
void __iomem *prcmu_timer_base;
if (cpu_is_u5500()) {
#ifdef CONFIG_LOCAL_TIMERS
twd_base = __io_address(U5500_TWD_BASE);
#endif
mtu_base = __io_address(U5500_MTU0_BASE);
mtu_timer_base = __io_address(U5500_MTU0_BASE);
prcmu_timer_base = __io_address(U5500_PRCMU_TIMER_3_BASE);
} else if (cpu_is_u8500()) {
#ifdef CONFIG_LOCAL_TIMERS
twd_base = __io_address(U8500_TWD_BASE);
#endif
mtu_base = __io_address(U8500_MTU0_BASE);
mtu_timer_base = __io_address(U8500_MTU0_BASE);
prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
} else {
ux500_unknown_soc();
@ -52,7 +53,7 @@ static void __init ux500_timer_init(void)
*
*/
nmdk_timer_init();
nmdk_timer_init(mtu_timer_base);
clksrc_dbx500_prcmu_init(prcmu_timer_base);
}

4
arch/arm/plat-nomadik/include/plat/mtu.h
View File

@ -1,9 +1,7 @@
#ifndef __PLAT_MTU_H
#define __PLAT_MTU_H
/* should be set by the platform code */
extern void __iomem *mtu_base;
void nmdk_timer_init(void __iomem *base);
void nmdk_clkevt_reset(void);
void nmdk_clksrc_reset(void);

33
arch/arm/plat-nomadik/timer.c
View File

@ -20,12 +20,6 @@
#include <asm/mach/time.h>
#include <asm/sched_clock.h>
/*
* Guaranteed runtime conversion range in seconds for
* the clocksource and clockevent.
*/
#define MTU_MIN_RANGE 4
/*
* The MTU device hosts four different counters, with 4 set of
* registers. These are register names.
@ -66,12 +60,11 @@
#define MTU_PCELL2 0xff8
#define MTU_PCELL3 0xffC
static void __iomem *mtu_base;
static bool clkevt_periodic;
static u32 clk_prescale;
static u32 nmdk_cycle; /* write-once */
void __iomem *mtu_base; /* Assigned by machine code */
#ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK
/*
* Override the global weak sched_clock symbol with this
@ -103,7 +96,6 @@ static int nmdk_clkevt_next(unsigned long evt, struct clock_event_device *ev)
void nmdk_clkevt_reset(void)
{
if (clkevt_periodic) {
/* Timer: configure load and background-load, and fire it up */
writel(nmdk_cycle, mtu_base + MTU_LR(1));
writel(nmdk_cycle, mtu_base + MTU_BGLR(1));
@ -121,7 +113,6 @@ void nmdk_clkevt_reset(void)
static void nmdk_clkevt_mode(enum clock_event_mode mode,
struct clock_event_device *dev)
{
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
clkevt_periodic = true;
@ -183,15 +174,16 @@ void nmdk_clksrc_reset(void)
mtu_base + MTU_CR(0));
}
void __init nmdk_timer_init(void)
void __init nmdk_timer_init(void __iomem *base)
{
unsigned long rate;
struct clk *clk0;
mtu_base = base;
clk0 = clk_get_sys("mtu0", NULL);
BUG_ON(IS_ERR(clk0));
clk_enable(clk0);
BUG_ON(clk_prepare(clk0) < 0);
BUG_ON(clk_enable(clk0) < 0);
/*
* Tick rate is 2.4MHz for Nomadik and 2.4Mhz, 100MHz or 133 MHz
@ -224,17 +216,8 @@ void __init nmdk_timer_init(void)
setup_sched_clock(nomadik_read_sched_clock, 32, rate);
#endif
/* Timer 1 is used for events */
clockevents_calc_mult_shift(&nmdk_clkevt, rate, MTU_MIN_RANGE);
nmdk_clkevt.max_delta_ns =
clockevent_delta2ns(0xffffffff, &nmdk_clkevt);
nmdk_clkevt.min_delta_ns =
clockevent_delta2ns(0x00000002, &nmdk_clkevt);
nmdk_clkevt.cpumask = cpumask_of(0);
/* Register irq and clockevents */
/* Timer 1 is used for events, register irq and clockevents */
setup_irq(IRQ_MTU0, &nmdk_timer_irq);
clockevents_register_device(&nmdk_clkevt);
nmdk_clkevt.cpumask = cpumask_of(0);
clockevents_config_and_register(&nmdk_clkevt, rate, 2, 0xffffffffU);
}