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Signed-off-by: Peng Fan --- drivers/clocksource/timer-imx-sysctr.c | 75 +++++++++++++++++++-----------= ---- 1 file changed, 43 insertions(+), 32 deletions(-) diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/t= imer-imx-sysctr.c index 5a7a951c4efc..8d5bfb8470fb 100644 --- a/drivers/clocksource/timer-imx-sysctr.c +++ b/drivers/clocksource/timer-imx-sysctr.c @@ -20,32 +20,39 @@ =20 #define SYS_CTR_CLK_DIV 0x3 =20 -static void __iomem *sys_ctr_base __ro_after_init; -static u32 cmpcr __ro_after_init; +struct sysctr_private { + u32 cmpcr; +}; =20 -static void sysctr_timer_enable(bool enable) +static void sysctr_timer_enable(struct clock_event_device *evt, bool enabl= e) { - writel(enable ? cmpcr | SYS_CTR_EN : cmpcr, sys_ctr_base + CMPCR); + struct timer_of *to =3D to_timer_of(evt); + struct sysctr_private *priv =3D to->private_data; + void __iomem *base =3D timer_of_base(to); + + writel(enable ? priv->cmpcr | SYS_CTR_EN : priv->cmpcr, base + CMPCR); } =20 -static void sysctr_irq_acknowledge(void) +static void sysctr_irq_acknowledge(struct clock_event_device *evt) { /* * clear the enable bit(EN =3D0) will clear * the status bit(ISTAT =3D 0), then the interrupt * signal will be negated(acknowledged). */ - sysctr_timer_enable(false); + sysctr_timer_enable(evt, false); } =20 -static inline u64 sysctr_read_counter(void) +static inline u64 sysctr_read_counter(struct clock_event_device *evt) { + struct timer_of *to =3D to_timer_of(evt); + void __iomem *base =3D timer_of_base(to); u32 cnt_hi, tmp_hi, cnt_lo; =20 do { - cnt_hi =3D readl_relaxed(sys_ctr_base + CNTCV_HI); - cnt_lo =3D readl_relaxed(sys_ctr_base + CNTCV_LO); - tmp_hi =3D readl_relaxed(sys_ctr_base + CNTCV_HI); + cnt_hi =3D readl_relaxed(base + CNTCV_HI); + cnt_lo =3D readl_relaxed(base + CNTCV_LO); + tmp_hi =3D readl_relaxed(base + CNTCV_HI); } while (tmp_hi !=3D cnt_hi); =20 return ((u64) cnt_hi << 32) | cnt_lo; @@ -54,22 +61,24 @@ static inline u64 sysctr_read_counter(void) static int sysctr_set_next_event(unsigned long delta, struct clock_event_device *evt) { + struct timer_of *to =3D to_timer_of(evt); + void __iomem *base =3D timer_of_base(to); u32 cmp_hi, cmp_lo; u64 next; =20 - sysctr_timer_enable(false); + sysctr_timer_enable(evt, false); =20 - next =3D sysctr_read_counter(); + next =3D sysctr_read_counter(evt); =20 next +=3D delta; =20 cmp_hi =3D (next >> 32) & 0x00fffff; cmp_lo =3D next & 0xffffffff; =20 - writel_relaxed(cmp_hi, sys_ctr_base + CMPCV_HI); - writel_relaxed(cmp_lo, sys_ctr_base + CMPCV_LO); + writel_relaxed(cmp_hi, base + CMPCV_HI); + writel_relaxed(cmp_lo, base + CMPCV_LO); =20 - sysctr_timer_enable(true); + sysctr_timer_enable(evt, true); =20 return 0; } @@ -81,7 +90,7 @@ static int sysctr_set_state_oneshot(struct clock_event_de= vice *evt) =20 static int sysctr_set_state_shutdown(struct clock_event_device *evt) { - sysctr_timer_enable(false); + sysctr_timer_enable(evt, false); =20 return 0; } @@ -90,7 +99,7 @@ static irqreturn_t sysctr_timer_interrupt(int irq, void *= dev_id) { struct clock_event_device *evt =3D dev_id; =20 - sysctr_irq_acknowledge(); + sysctr_irq_acknowledge(evt); =20 evt->event_handler(evt); =20 @@ -117,34 +126,36 @@ static struct timer_of to_sysctr =3D { }, }; =20 -static void __init sysctr_clockevent_init(void) -{ - to_sysctr.clkevt.cpumask =3D cpu_possible_mask; - - clockevents_config_and_register(&to_sysctr.clkevt, - timer_of_rate(&to_sysctr), - 0xff, 0x7fffffff); -} - static int __init sysctr_timer_init(struct device_node *np) { - int ret =3D 0; + struct sysctr_private *priv; + void __iomem *base; + int ret; + + priv =3D kzalloc(sizeof(struct sysctr_private), GFP_KERNEL); + if (!priv) + return -ENOMEM; =20 ret =3D timer_of_init(np, &to_sysctr); - if (ret) + if (ret) { + kfree(priv); return ret; + } =20 if (!of_property_read_bool(np, "nxp,no-divider")) { /* system counter clock is divided by 3 internally */ to_sysctr.of_clk.rate /=3D SYS_CTR_CLK_DIV; } =20 - sys_ctr_base =3D timer_of_base(&to_sysctr); - cmpcr =3D readl(sys_ctr_base + CMPCR); - cmpcr &=3D ~SYS_CTR_EN; + to_sysctr.clkevt.cpumask =3D cpu_possible_mask; + to_sysctr.private_data =3D priv; =20 - sysctr_clockevent_init(); + base =3D timer_of_base(&to_sysctr); + priv->cmpcr =3D readl(base + CMPCR) & ~SYS_CTR_EN; =20 + clockevents_config_and_register(&to_sysctr.clkevt, + timer_of_rate(&to_sysctr), + 0xff, 0x7fffffff); return 0; } TIMER_OF_DECLARE(sysctr_timer, "nxp,sysctr-timer", sysctr_timer_init); --=20 2.37.1