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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-03 14:13:41 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-03 14:13:41 -0800 |
commit | 7b2a4306f9e7d64bb408a6df3bb419500578068a (patch) | |
tree | c8ce206194c47c8bd50ee6b5828e0c734d571200 /drivers | |
parent | 316dde2fe95b33657de1fc2db54bfc16aa065790 (diff) | |
parent | 03f136a2074b2b8890da4a24df7104558ad0da48 (diff) | |
download | linux-7b2a4306f9e7d64bb408a6df3bb419500578068a.tar.gz linux-7b2a4306f9e7d64bb408a6df3bb419500578068a.tar.bz2 linux-7b2a4306f9e7d64bb408a6df3bb419500578068a.zip |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"The timer departement provides:
- More y2038 work in the area of ntp and pps.
- Optimization of posix cpu timers
- New time related selftests
- Some new clocksource drivers
- The usual pile of fixes, cleanups and improvements"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
timeconst: Update path in comment
timers/x86/hpet: Type adjustments
clocksource/drivers/armada-370-xp: Implement ARM delay timer
clocksource/drivers/tango_xtal: Add new timer for Tango SoCs
clocksource/drivers/imx: Allow timer irq affinity change
clocksource/drivers/exynos_mct: Use container_of() instead of this_cpu_ptr()
clocksource/drivers/h8300_*: Remove unneeded memset()s
clocksource/drivers/sh_cmt: Remove unneeded memset() in sh_cmt_setup()
clocksource/drivers/em_sti: Remove unneeded memset()s
clocksource/drivers/mediatek: Use GPT as sched clock source
clockevents/drivers/mtk: Fix spurious interrupt leading to crash
posix_cpu_timer: Reduce unnecessary sighand lock contention
posix_cpu_timer: Convert cputimer->running to bool
posix_cpu_timer: Check thread timers only when there are active thread timers
posix_cpu_timer: Optimize fastpath_timer_check()
timers, kselftest: Add 'adjtick' test to validate adjtimex() tick adjustments
timers: Use __fls in apply_slack()
clocksource: Remove return statement from void functions
net: sfc: avoid using timespec
ntp/pps: use y2038 safe types in pps_event_time
...
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clocksource/Kconfig | 4 | ||||
-rw-r--r-- | drivers/clocksource/Makefile | 1 | ||||
-rw-r--r-- | drivers/clocksource/em_sti.c | 2 | ||||
-rw-r--r-- | drivers/clocksource/exynos_mct.c | 12 | ||||
-rw-r--r-- | drivers/clocksource/h8300_timer16.c | 1 | ||||
-rw-r--r-- | drivers/clocksource/h8300_timer8.c | 1 | ||||
-rw-r--r-- | drivers/clocksource/h8300_tpu.c | 1 | ||||
-rw-r--r-- | drivers/clocksource/mtk_timer.c | 26 | ||||
-rw-r--r-- | drivers/clocksource/sh_cmt.c | 1 | ||||
-rw-r--r-- | drivers/clocksource/tango_xtal.c | 66 | ||||
-rw-r--r-- | drivers/clocksource/time-armada-370-xp.c | 14 | ||||
-rw-r--r-- | drivers/clocksource/timer-imx-gpt.c | 3 | ||||
-rw-r--r-- | drivers/net/ethernet/sfc/ptp.c | 30 | ||||
-rw-r--r-- | drivers/pps/kapi.c | 4 |
14 files changed, 128 insertions, 38 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index a7726db13abb..50b68bc20720 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -279,6 +279,10 @@ config CLKSRC_MIPS_GIC depends on MIPS_GIC select CLKSRC_OF +config CLKSRC_TANGO_XTAL + bool + select CLKSRC_OF + config CLKSRC_PXA def_bool y if ARCH_PXA || ARCH_SA1100 select CLKSRC_OF if OF diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 5c00863c3e33..fc9348dc4f92 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_ARCH_KEYSTONE) += timer-keystone.o obj-$(CONFIG_ARCH_INTEGRATOR_AP) += timer-integrator-ap.o obj-$(CONFIG_CLKSRC_VERSATILE) += versatile.o obj-$(CONFIG_CLKSRC_MIPS_GIC) += mips-gic-timer.o +obj-$(CONFIG_CLKSRC_TANGO_XTAL) += tango_xtal.o obj-$(CONFIG_CLKSRC_IMX_GPT) += timer-imx-gpt.o obj-$(CONFIG_ASM9260_TIMER) += asm9260_timer.o obj-$(CONFIG_H8300) += h8300_timer8.o diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c index 7a97a34dba70..19bb1792d647 100644 --- a/drivers/clocksource/em_sti.c +++ b/drivers/clocksource/em_sti.c @@ -228,7 +228,6 @@ static int em_sti_register_clocksource(struct em_sti_priv *p) { struct clocksource *cs = &p->cs; - memset(cs, 0, sizeof(*cs)); cs->name = dev_name(&p->pdev->dev); cs->rating = 200; cs->read = em_sti_clocksource_read; @@ -285,7 +284,6 @@ static void em_sti_register_clockevent(struct em_sti_priv *p) { struct clock_event_device *ced = &p->ced; - memset(ced, 0, sizeof(*ced)); ced->name = dev_name(&p->pdev->dev); ced->features = CLOCK_EVT_FEAT_ONESHOT; ced->rating = 200; diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 029f96ab131a..ff44082a0827 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -382,24 +382,28 @@ static void exynos4_mct_tick_start(unsigned long cycles, static int exynos4_tick_set_next_event(unsigned long cycles, struct clock_event_device *evt) { - struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick); + struct mct_clock_event_device *mevt; + mevt = container_of(evt, struct mct_clock_event_device, evt); exynos4_mct_tick_start(cycles, mevt); - return 0; } static int set_state_shutdown(struct clock_event_device *evt) { - exynos4_mct_tick_stop(this_cpu_ptr(&percpu_mct_tick)); + struct mct_clock_event_device *mevt; + + mevt = container_of(evt, struct mct_clock_event_device, evt); + exynos4_mct_tick_stop(mevt); return 0; } static int set_state_periodic(struct clock_event_device *evt) { - struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick); + struct mct_clock_event_device *mevt; unsigned long cycles_per_jiffy; + mevt = container_of(evt, struct mct_clock_event_device, evt); cycles_per_jiffy = (((unsigned long long)NSEC_PER_SEC / HZ * evt->mult) >> evt->shift); exynos4_mct_tick_stop(mevt); diff --git a/drivers/clocksource/h8300_timer16.c b/drivers/clocksource/h8300_timer16.c index 82941c1e9e33..0e076c6fc006 100644 --- a/drivers/clocksource/h8300_timer16.c +++ b/drivers/clocksource/h8300_timer16.c @@ -153,7 +153,6 @@ static int timer16_setup(struct timer16_priv *p, struct platform_device *pdev) int ret, irq; unsigned int ch; - memset(p, 0, sizeof(*p)); p->pdev = pdev; res[REG_CH] = platform_get_resource(p->pdev, diff --git a/drivers/clocksource/h8300_timer8.c b/drivers/clocksource/h8300_timer8.c index f9b3b7033a97..44375d8b9bc4 100644 --- a/drivers/clocksource/h8300_timer8.c +++ b/drivers/clocksource/h8300_timer8.c @@ -215,7 +215,6 @@ static int timer8_setup(struct timer8_priv *p, int irq; int ret; - memset(p, 0, sizeof(*p)); p->pdev = pdev; res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0); diff --git a/drivers/clocksource/h8300_tpu.c b/drivers/clocksource/h8300_tpu.c index 64195fdd78bf..5487410bfabb 100644 --- a/drivers/clocksource/h8300_tpu.c +++ b/drivers/clocksource/h8300_tpu.c @@ -123,7 +123,6 @@ static int __init tpu_setup(struct tpu_priv *p, struct platform_device *pdev) { struct resource *res[2]; - memset(p, 0, sizeof(*p)); p->pdev = pdev; res[CH_L] = platform_get_resource(p->pdev, IORESOURCE_MEM, CH_L); diff --git a/drivers/clocksource/mtk_timer.c b/drivers/clocksource/mtk_timer.c index 50f0641c65b6..fbfc74685e6a 100644 --- a/drivers/clocksource/mtk_timer.c +++ b/drivers/clocksource/mtk_timer.c @@ -24,6 +24,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_irq.h> +#include <linux/sched_clock.h> #include <linux/slab.h> #define GPT_IRQ_EN_REG 0x00 @@ -59,6 +60,13 @@ struct mtk_clock_event_device { struct clock_event_device dev; }; +static void __iomem *gpt_sched_reg __read_mostly; + +static u64 notrace mtk_read_sched_clock(void) +{ + return readl_relaxed(gpt_sched_reg); +} + static inline struct mtk_clock_event_device *to_mtk_clk( struct clock_event_device *c) { @@ -141,14 +149,6 @@ static irqreturn_t mtk_timer_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static void mtk_timer_global_reset(struct mtk_clock_event_device *evt) -{ - /* Disable all interrupts */ - writel(0x0, evt->gpt_base + GPT_IRQ_EN_REG); - /* Acknowledge all interrupts */ - writel(0x3f, evt->gpt_base + GPT_IRQ_ACK_REG); -} - static void mtk_timer_setup(struct mtk_clock_event_device *evt, u8 timer, u8 option) { @@ -168,6 +168,12 @@ static void mtk_timer_enable_irq(struct mtk_clock_event_device *evt, u8 timer) { u32 val; + /* Disable all interrupts */ + writel(0x0, evt->gpt_base + GPT_IRQ_EN_REG); + + /* Acknowledge all spurious pending interrupts */ + writel(0x3f, evt->gpt_base + GPT_IRQ_ACK_REG); + val = readl(evt->gpt_base + GPT_IRQ_EN_REG); writel(val | GPT_IRQ_ENABLE(timer), evt->gpt_base + GPT_IRQ_EN_REG); @@ -220,8 +226,6 @@ static void __init mtk_timer_init(struct device_node *node) } rate = clk_get_rate(clk); - mtk_timer_global_reset(evt); - if (request_irq(evt->dev.irq, mtk_timer_interrupt, IRQF_TIMER | IRQF_IRQPOLL, "mtk_timer", evt)) { pr_warn("failed to setup irq %d\n", evt->dev.irq); @@ -234,6 +238,8 @@ static void __init mtk_timer_init(struct device_node *node) mtk_timer_setup(evt, GPT_CLK_SRC, TIMER_CTRL_OP_FREERUN); clocksource_mmio_init(evt->gpt_base + TIMER_CNT_REG(GPT_CLK_SRC), node->name, rate, 300, 32, clocksource_mmio_readl_up); + gpt_sched_reg = evt->gpt_base + TIMER_CNT_REG(GPT_CLK_SRC); + sched_clock_register(mtk_read_sched_clock, 32, rate); /* Configure clock event */ mtk_timer_setup(evt, GPT_CLK_EVT, TIMER_CTRL_OP_REPEAT); diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index ba73a6eb8d66..103c49362c68 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -962,7 +962,6 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev) unsigned int i; int ret; - memset(cmt, 0, sizeof(*cmt)); cmt->pdev = pdev; raw_spin_lock_init(&cmt->lock); diff --git a/drivers/clocksource/tango_xtal.c b/drivers/clocksource/tango_xtal.c new file mode 100644 index 000000000000..d297b30d2bc0 --- /dev/null +++ b/drivers/clocksource/tango_xtal.c @@ -0,0 +1,66 @@ +#include <linux/clocksource.h> +#include <linux/sched_clock.h> +#include <linux/of_address.h> +#include <linux/printk.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/clk.h> + +static void __iomem *xtal_in_cnt; +static struct delay_timer delay_timer; + +static unsigned long notrace read_xtal_counter(void) +{ + return readl_relaxed(xtal_in_cnt); +} + +static u64 notrace read_sched_clock(void) +{ + return read_xtal_counter(); +} + +static cycle_t read_clocksource(struct clocksource *cs) +{ + return read_xtal_counter(); +} + +static struct clocksource tango_xtal = { + .name = "tango-xtal", + .rating = 350, + .read = read_clocksource, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static void __init tango_clocksource_init(struct device_node *np) +{ + struct clk *clk; + int xtal_freq, ret; + + xtal_in_cnt = of_iomap(np, 0); + if (xtal_in_cnt == NULL) { + pr_err("%s: invalid address\n", np->full_name); + return; + } + + clk = of_clk_get(np, 0); + if (IS_ERR(clk)) { + pr_err("%s: invalid clock\n", np->full_name); + return; + } + + xtal_freq = clk_get_rate(clk); + delay_timer.freq = xtal_freq; + delay_timer.read_current_timer = read_xtal_counter; + + ret = clocksource_register_hz(&tango_xtal, xtal_freq); + if (ret != 0) { + pr_err("%s: registration failed\n", np->full_name); + return; + } + + sched_clock_register(read_sched_clock, 32, xtal_freq); + register_current_timer_delay(&delay_timer); +} + +CLOCKSOURCE_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init); diff --git a/drivers/clocksource/time-armada-370-xp.c b/drivers/clocksource/time-armada-370-xp.c index 2162796fd504..d93ec3c4f139 100644 --- a/drivers/clocksource/time-armada-370-xp.c +++ b/drivers/clocksource/time-armada-370-xp.c @@ -45,6 +45,8 @@ #include <linux/percpu.h> #include <linux/syscore_ops.h> +#include <asm/delay.h> + /* * Timer block registers. */ @@ -249,6 +251,15 @@ struct syscore_ops armada_370_xp_timer_syscore_ops = { .resume = armada_370_xp_timer_resume, }; +static unsigned long armada_370_delay_timer_read(void) +{ + return ~readl(timer_base + TIMER0_VAL_OFF); +} + +static struct delay_timer armada_370_delay_timer = { + .read_current_timer = armada_370_delay_timer_read, +}; + static void __init armada_370_xp_timer_common_init(struct device_node *np) { u32 clr = 0, set = 0; @@ -287,6 +298,9 @@ static void __init armada_370_xp_timer_common_init(struct device_node *np) TIMER0_RELOAD_EN | enable_mask, TIMER0_RELOAD_EN | enable_mask); + armada_370_delay_timer.freq = timer_clk; + register_current_timer_delay(&armada_370_delay_timer); + /* * Set scale and timer for sched_clock. */ diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c index 839aba92fc39..99ec96769dda 100644 --- a/drivers/clocksource/timer-imx-gpt.c +++ b/drivers/clocksource/timer-imx-gpt.c @@ -305,13 +305,14 @@ static int __init mxc_clockevent_init(struct imx_timer *imxtm) struct irqaction *act = &imxtm->act; ced->name = "mxc_timer1"; - ced->features = CLOCK_EVT_FEAT_ONESHOT; + ced->features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_DYNIRQ; ced->set_state_shutdown = mxc_shutdown; ced->set_state_oneshot = mxc_set_oneshot; ced->tick_resume = mxc_shutdown; ced->set_next_event = imxtm->gpt->set_next_event; ced->rating = 200; ced->cpumask = cpumask_of(0); + ced->irq = imxtm->irq; clockevents_config_and_register(ced, clk_get_rate(imxtm->clk_per), 0xff, 0xfffffffe); diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index ad62615a93dc..c771e0af4e06 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -401,8 +401,8 @@ size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats) /* For Siena platforms NIC time is s and ns */ static void efx_ptp_ns_to_s_ns(s64 ns, u32 *nic_major, u32 *nic_minor) { - struct timespec ts = ns_to_timespec(ns); - *nic_major = ts.tv_sec; + struct timespec64 ts = ns_to_timespec64(ns); + *nic_major = (u32)ts.tv_sec; *nic_minor = ts.tv_nsec; } @@ -431,8 +431,8 @@ static ktime_t efx_ptp_s_ns_to_ktime_correction(u32 nic_major, u32 nic_minor, */ static void efx_ptp_ns_to_s27(s64 ns, u32 *nic_major, u32 *nic_minor) { - struct timespec ts = ns_to_timespec(ns); - u32 maj = ts.tv_sec; + struct timespec64 ts = ns_to_timespec64(ns); + u32 maj = (u32)ts.tv_sec; u32 min = (u32)(((u64)ts.tv_nsec * NS_TO_S27_MULT + (1ULL << (NS_TO_S27_SHIFT - 1))) >> NS_TO_S27_SHIFT); @@ -646,28 +646,28 @@ static void efx_ptp_send_times(struct efx_nic *efx, struct pps_event_time *last_time) { struct pps_event_time now; - struct timespec limit; + struct timespec64 limit; struct efx_ptp_data *ptp = efx->ptp_data; - struct timespec start; + struct timespec64 start; int *mc_running = ptp->start.addr; pps_get_ts(&now); start = now.ts_real; limit = now.ts_real; - timespec_add_ns(&limit, SYNCHRONISE_PERIOD_NS); + timespec64_add_ns(&limit, SYNCHRONISE_PERIOD_NS); /* Write host time for specified period or until MC is done */ - while ((timespec_compare(&now.ts_real, &limit) < 0) && + while ((timespec64_compare(&now.ts_real, &limit) < 0) && ACCESS_ONCE(*mc_running)) { - struct timespec update_time; + struct timespec64 update_time; unsigned int host_time; /* Don't update continuously to avoid saturating the PCIe bus */ update_time = now.ts_real; - timespec_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS); + timespec64_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS); do { pps_get_ts(&now); - } while ((timespec_compare(&now.ts_real, &update_time) < 0) && + } while ((timespec64_compare(&now.ts_real, &update_time) < 0) && ACCESS_ONCE(*mc_running)); /* Synchronise NIC with single word of time only */ @@ -723,7 +723,7 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), struct efx_ptp_data *ptp = efx->ptp_data; u32 last_sec; u32 start_sec; - struct timespec delta; + struct timespec64 delta; ktime_t mc_time; if (number_readings == 0) @@ -737,14 +737,14 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), */ for (i = 0; i < number_readings; i++) { s32 window, corrected; - struct timespec wait; + struct timespec64 wait; efx_ptp_read_timeset( MCDI_ARRAY_STRUCT_PTR(synch_buf, PTP_OUT_SYNCHRONIZE_TIMESET, i), &ptp->timeset[i]); - wait = ktime_to_timespec( + wait = ktime_to_timespec64( ptp->nic_to_kernel_time(0, ptp->timeset[i].wait, 0)); window = ptp->timeset[i].window; corrected = window - wait.tv_nsec; @@ -803,7 +803,7 @@ efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf), ptp->timeset[last_good].minor, 0); /* Calculate delay from NIC top of second to last_time */ - delta.tv_nsec += ktime_to_timespec(mc_time).tv_nsec; + delta.tv_nsec += ktime_to_timespec64(mc_time).tv_nsec; /* Set PPS timestamp to match NIC top of second */ ptp->host_time_pps = *last_time; diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c index cdad4d95b20e..805c749ac1ad 100644 --- a/drivers/pps/kapi.c +++ b/drivers/pps/kapi.c @@ -179,8 +179,8 @@ void pps_event(struct pps_device *pps, struct pps_event_time *ts, int event, /* check event type */ BUG_ON((event & (PPS_CAPTUREASSERT | PPS_CAPTURECLEAR)) == 0); - dev_dbg(pps->dev, "PPS event at %ld.%09ld\n", - ts->ts_real.tv_sec, ts->ts_real.tv_nsec); + dev_dbg(pps->dev, "PPS event at %lld.%09ld\n", + (s64)ts->ts_real.tv_sec, ts->ts_real.tv_nsec); timespec_to_pps_ktime(&ts_real, ts->ts_real); 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