| Message ID | 1464428033-52106-3-git-send-email-wangkefeng.wang@huawei.com |
|---|---|
| State | New |
| Headers | show |
On 05/28/2016 11:33 AM, Kefeng Wang wrote: > Introduce helper sp804_load_mode_set(), and use it, prepare for 64bit > mode timer support. More verbose please. > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > --- > drivers/clocksource/timer-sp804.c | 27 +++++++++++++-------------- > 1 file changed, 13 insertions(+), 14 deletions(-) > > diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c > index 362e5d0..b8848e5 100644 > --- a/drivers/clocksource/timer-sp804.c > +++ b/drivers/clocksource/timer-sp804.c > @@ -73,6 +73,15 @@ static long __init sp804_get_clock_rate(struct clk *clk, const char *name) > return rate; > } > > +static inline void sp804_load_mode_set(void __iomem *base, unsigned long load, int mode) > +{ > + unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | > + mode | TIMER_CTRL_ENABLE; > + > + writel(load, base + TIMER_LOAD); > + writel(ctrl, base + TIMER_CTRL); > +} > + > static void __iomem *sched_clock_base; > > static u64 notrace sp804_read(void) > @@ -97,10 +106,8 @@ void __init __sp804_clocksource_and_sched_clock_init(void __iomem *base, > > /* setup timer 0 as free-running clocksource */ > writel(0, base + TIMER_CTRL); > - writel(0xffffffff, base + TIMER_LOAD); > writel(0xffffffff, base + TIMER_VALUE); > - writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, > - base + TIMER_CTRL); > + sp804_load_mode_set(base, 0xffffffff, TIMER_CTRL_PERIODIC & ~TIMER_CTRL_IE); Can you explain this change ? > clocksource_mmio_init(base + TIMER_VALUE, name, > rate, 200, 32, clocksource_mmio_readl_down); > @@ -143,24 +150,16 @@ static int sp804_shutdown(struct clock_event_device *evt) > > static int sp804_set_periodic(struct clock_event_device *evt) > { > - unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | > - TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE; > - > timer_shutdown(evt); > - writel(clkevt_reload, clkevt_base + TIMER_LOAD); > - writel(ctrl, clkevt_base + TIMER_CTRL); > + sp804_load_mode_set(clkevt_base, clkevt_reload, TIMER_CTRL_PERIODIC); > return 0; > } > > static int sp804_set_next_event(unsigned long next, > - struct clock_event_device *evt) > + struct clock_event_device *evt) > { > - unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | > - TIMER_CTRL_ONESHOT | TIMER_CTRL_ENABLE; > - > - writel(next, clkevt_base + TIMER_LOAD); > - writel(ctrl, clkevt_base + TIMER_CTRL); > > + sp804_load_mode_set(clkevt_base, next, TIMER_CTRL_ONESHOT); > return 0; > } > > -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog
diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c index 362e5d0..b8848e5 100644 --- a/drivers/clocksource/timer-sp804.c +++ b/drivers/clocksource/timer-sp804.c @@ -73,6 +73,15 @@ static long __init sp804_get_clock_rate(struct clk *clk, const char *name) return rate; } +static inline void sp804_load_mode_set(void __iomem *base, unsigned long load, int mode) +{ + unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | + mode | TIMER_CTRL_ENABLE; + + writel(load, base + TIMER_LOAD); + writel(ctrl, base + TIMER_CTRL); +} + static void __iomem *sched_clock_base; static u64 notrace sp804_read(void) @@ -97,10 +106,8 @@ void __init __sp804_clocksource_and_sched_clock_init(void __iomem *base, /* setup timer 0 as free-running clocksource */ writel(0, base + TIMER_CTRL); - writel(0xffffffff, base + TIMER_LOAD); writel(0xffffffff, base + TIMER_VALUE); - writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, - base + TIMER_CTRL); + sp804_load_mode_set(base, 0xffffffff, TIMER_CTRL_PERIODIC & ~TIMER_CTRL_IE); clocksource_mmio_init(base + TIMER_VALUE, name, rate, 200, 32, clocksource_mmio_readl_down); @@ -143,24 +150,16 @@ static int sp804_shutdown(struct clock_event_device *evt) static int sp804_set_periodic(struct clock_event_device *evt) { - unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | - TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE; - timer_shutdown(evt); - writel(clkevt_reload, clkevt_base + TIMER_LOAD); - writel(ctrl, clkevt_base + TIMER_CTRL); + sp804_load_mode_set(clkevt_base, clkevt_reload, TIMER_CTRL_PERIODIC); return 0; } static int sp804_set_next_event(unsigned long next, - struct clock_event_device *evt) + struct clock_event_device *evt) { - unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE | - TIMER_CTRL_ONESHOT | TIMER_CTRL_ENABLE; - - writel(next, clkevt_base + TIMER_LOAD); - writel(ctrl, clkevt_base + TIMER_CTRL); + sp804_load_mode_set(clkevt_base, next, TIMER_CTRL_ONESHOT); return 0; }
Introduce helper sp804_load_mode_set(), and use it, prepare for 64bit mode timer support. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> --- drivers/clocksource/timer-sp804.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) -- 1.7.12.4