diff options
author | Arnd Bergmann <arnd@arndb.de> | 2012-03-13 11:52:58 (GMT) |
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committer | Arnd Bergmann <arnd@arndb.de> | 2012-03-13 11:52:58 (GMT) |
commit | 69adb983ce0639d02c87aa9947663d5ad50116d0 (patch) | |
tree | 5c5193d230f43236fa2a1f24221c96dc5d413a06 /arch | |
parent | b01543dfe67bb1d191998e90d20534dc354de059 (diff) | |
parent | 0ee411aebe9c14aedb3aef54164b941471177b1c (diff) | |
download | linux-fsl-qoriq-69adb983ce0639d02c87aa9947663d5ad50116d0.tar.xz |
Merge branch 'ux500/timers' into next/timer
* ux500/timers:
ARM: plat-nomadik: modernize MTU timer
ARM: plat-nomadik: handle clocking properly
ARM: plat-nomadik: get rid of global mtu base pointer
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-nomadik/board-nhk8815.c | 7 | ||||
-rw-r--r-- | arch/arm/mach-nomadik/include/mach/setup.h | 19 | ||||
-rw-r--r-- | arch/arm/mach-ux500/include/mach/setup.h | 3 | ||||
-rw-r--r-- | arch/arm/mach-ux500/timer.c | 7 | ||||
-rw-r--r-- | arch/arm/plat-nomadik/include/plat/mtu.h | 4 | ||||
-rw-r--r-- | arch/arm/plat-nomadik/timer.c | 33 |
6 files changed, 15 insertions, 58 deletions
diff --git a/arch/arm/mach-nomadik/board-nhk8815.c b/arch/arm/mach-nomadik/board-nhk8815.c index 7c878bf..b77cb84 100644 --- a/arch/arm/mach-nomadik/board-nhk8815.c +++ b/arch/arm/mach-nomadik/board-nhk8815.c @@ -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> @@ -255,10 +255,7 @@ 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 = { diff --git a/arch/arm/mach-nomadik/include/mach/setup.h b/arch/arm/mach-nomadik/include/mach/setup.h deleted file mode 100644 index bcaeaf4..0000000 --- a/arch/arm/mach-nomadik/include/mach/setup.h +++ /dev/null @@ -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 */ diff --git a/arch/arm/mach-ux500/include/mach/setup.h b/arch/arm/mach-ux500/include/mach/setup.h index a7d363f..93d4039 100644 --- a/arch/arm/mach-ux500/include/mach/setup.h +++ b/arch/arm/mach-ux500/include/mach/setup.h @@ -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); diff --git a/arch/arm/mach-ux500/timer.c b/arch/arm/mach-ux500/timer.c index aea467d..fd00024 100644 --- a/arch/arm/mach-ux500/timer.c +++ b/arch/arm/mach-ux500/timer.c @@ -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); } diff --git a/arch/arm/plat-nomadik/include/plat/mtu.h b/arch/arm/plat-nomadik/include/plat/mtu.h index 6508e76..582641f 100644 --- a/arch/arm/plat-nomadik/include/plat/mtu.h +++ b/arch/arm/plat-nomadik/include/plat/mtu.h @@ -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); diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index ad1b45b..9222e55 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -21,12 +21,6 @@ #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); } |