diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-06 13:21:16 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-06 13:21:16 -0700 |
commit | 8e73e367f7dc50f1d1bc22a63e5764bb4eea9b48 (patch) | |
tree | 9bf593c1fc7612bcdd64b9ba46e41d340f9e94d3 /drivers/clocksource | |
parent | d2f3e9eb7c9e12e89f0ac5f0dbc7a9aed0ea925d (diff) | |
parent | 7323f219533e01cc075ba45a76f3e5b214adb23f (diff) |
Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This branch contains code cleanups, moves and removals for 3.12.
There's a large number of various cleanups, and a nice net removal of
13500 lines of code.
Highlights worth mentioning are:
- A series of patches from Stephen Boyd removing the ARM local timer
API.
- Move of Qualcomm MSM IOMMU code to drivers/iommu.
- Samsung PWM driver cleanups from Tomasz Figa, removing legacy PWM
driver and switching over to the drivers/pwm one.
- Removal of some unusued auto-generated headers for OMAP2+ (PRM/CM).
There's also a move of a header file out of include/linux/i2c/ to
platform_data, where it really belongs. It touches mostly ARM
platform code for include changes so we took it through our tree"
* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
ARM: OMAP2+: Add back the define for AM33XX_RST_GLOBAL_WARM_SW_MASK
gpio: (gpio-pca953x) move header to linux/platform_data/
arm: zynq: hotplug: Remove unreachable code
ARM: SAMSUNG: Remove unnecessary exynos4_default_sdhci*()
tegra: simplify use of devm_ioremap_resource
ARM: SAMSUNG: Remove plat/regs-timer.h header
ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header
ARM: SAMSUNG: Remove pwm-clock infrastructure
ARM: SAMSUNG: Remove old PWM timer platform devices
pwm: Remove superseded pwm-samsung-legacy driver
ARM: SAMSUNG: Modify board files to use new PWM platform device
ARM: SAMSUNG: Rework private data handling in dev-backlight
pwm: Add new pwm-samsung driver
ARM: mach-mvebu: remove redundant DT parsing and validation
ARM: msm: Only compile io.c on platforms that use it
iommu/msm: Move mach includes to iommu directory
ARM: msm: Remove devices-iommu.c
ARM: msm: Move mach/board.h contents to common.h
ARM: msm: Migrate msm_timer to CLOCKSOURCE_OF_DECLARE
ARM: msm: Remove TMR and TMR0 static mappings
...
Diffstat (limited to 'drivers/clocksource')
-rw-r--r-- | drivers/clocksource/Kconfig | 1 | ||||
-rw-r--r-- | drivers/clocksource/exynos_mct.c | 58 | ||||
-rw-r--r-- | drivers/clocksource/samsung_pwm_timer.c | 108 | ||||
-rw-r--r-- | drivers/clocksource/time-armada-370-xp.c | 92 | ||||
-rw-r--r-- | drivers/clocksource/timer-marco.c | 98 |
5 files changed, 197 insertions, 160 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index b7b9b040a89b..41c69469ce20 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -99,7 +99,6 @@ config CLKSRC_EXYNOS_MCT config CLKSRC_SAMSUNG_PWM bool - select CLKSRC_MMIO help This is a new clocksource driver for the PWM timer found in Samsung S3C, S5P and Exynos SoCs, replacing an earlier driver diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index b2bbc415f120..5b34768f4d7c 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -16,6 +16,7 @@ #include <linux/err.h> #include <linux/clk.h> #include <linux/clockchips.h> +#include <linux/cpu.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/percpu.h> @@ -24,7 +25,6 @@ #include <linux/of_address.h> #include <linux/clocksource.h> -#include <asm/localtimer.h> #include <asm/mach/time.h> #define EXYNOS4_MCTREG(x) (x) @@ -80,7 +80,7 @@ static unsigned int mct_int_type; static int mct_irqs[MCT_NR_IRQS]; struct mct_clock_event_device { - struct clock_event_device *evt; + struct clock_event_device evt; unsigned long base; char name[10]; }; @@ -295,8 +295,6 @@ static void exynos4_clockevent_init(void) setup_irq(mct_irqs[MCT_G0_IRQ], &mct_comp_event_irq); } -#ifdef CONFIG_LOCAL_TIMERS - static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick); /* Clock event handling */ @@ -369,7 +367,7 @@ static inline void exynos4_tick_set_mode(enum clock_event_mode mode, static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) { - struct clock_event_device *evt = mevt->evt; + struct clock_event_device *evt = &mevt->evt; /* * This is for supporting oneshot mode. @@ -391,7 +389,7 @@ static int exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id) { struct mct_clock_event_device *mevt = dev_id; - struct clock_event_device *evt = mevt->evt; + struct clock_event_device *evt = &mevt->evt; exynos4_mct_tick_clear(mevt); @@ -405,8 +403,7 @@ static int exynos4_local_timer_setup(struct clock_event_device *evt) struct mct_clock_event_device *mevt; unsigned int cpu = smp_processor_id(); - mevt = this_cpu_ptr(&percpu_mct_tick); - mevt->evt = evt; + mevt = container_of(evt, struct mct_clock_event_device, evt); mevt->base = EXYNOS4_MCT_L_BASE(cpu); sprintf(mevt->name, "mct_tick%d", cpu); @@ -448,14 +445,37 @@ static void exynos4_local_timer_stop(struct clock_event_device *evt) disable_percpu_irq(mct_irqs[MCT_L0_IRQ]); } -static struct local_timer_ops exynos4_mct_tick_ops = { - .setup = exynos4_local_timer_setup, - .stop = exynos4_local_timer_stop, +static int exynos4_mct_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +{ + struct mct_clock_event_device *mevt; + + /* + * Grab cpu pointer in each case to avoid spurious + * preemptible warnings + */ + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_STARTING: + mevt = this_cpu_ptr(&percpu_mct_tick); + exynos4_local_timer_setup(&mevt->evt); + break; + case CPU_DYING: + mevt = this_cpu_ptr(&percpu_mct_tick); + exynos4_local_timer_stop(&mevt->evt); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block exynos4_mct_cpu_nb = { + .notifier_call = exynos4_mct_cpu_notify, }; -#endif /* CONFIG_LOCAL_TIMERS */ static void __init exynos4_timer_resources(struct device_node *np, void __iomem *base) { + int err; + struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick); struct clk *mct_clk, *tick_clk; tick_clk = np ? of_clk_get_by_name(np, "fin_pll") : @@ -473,9 +493,7 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem if (!reg_base) panic("%s: unable to ioremap mct address space\n", __func__); -#ifdef CONFIG_LOCAL_TIMERS if (mct_int_type == MCT_INT_PPI) { - int err; err = request_percpu_irq(mct_irqs[MCT_L0_IRQ], exynos4_mct_tick_isr, "MCT", @@ -484,8 +502,16 @@ static void __init exynos4_timer_resources(struct device_node *np, void __iomem mct_irqs[MCT_L0_IRQ], err); } - local_timer_register(&exynos4_mct_tick_ops); -#endif /* CONFIG_LOCAL_TIMERS */ + err = register_cpu_notifier(&exynos4_mct_cpu_nb); + if (err) + goto out_irq; + + /* Immediately configure the timer on the boot CPU */ + exynos4_local_timer_setup(&mevt->evt); + return; + +out_irq: + free_percpu_irq(mct_irqs[MCT_L0_IRQ], &percpu_mct_tick); } void __init mct_init(void __iomem *base, int irq_g0, int irq_l0, int irq_l1) diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 584b5472eea3..ac60f8b8a5f7 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -44,16 +44,28 @@ #define TCFG1_SHIFT(x) ((x) * 4) #define TCFG1_MUX_MASK 0xf +/* + * Each channel occupies 4 bits in TCON register, but there is a gap of 4 + * bits (one channel) after channel 0, so channels have different numbering + * when accessing TCON register. + * + * In addition, the location of autoreload bit for channel 4 (TCON channel 5) + * in its set of bits is 2 as opposed to 3 for other channels. + */ #define TCON_START(chan) (1 << (4 * (chan) + 0)) #define TCON_MANUALUPDATE(chan) (1 << (4 * (chan) + 1)) #define TCON_INVERT(chan) (1 << (4 * (chan) + 2)) -#define TCON_AUTORELOAD(chan) (1 << (4 * (chan) + 3)) +#define _TCON_AUTORELOAD(chan) (1 << (4 * (chan) + 3)) +#define _TCON_AUTORELOAD4(chan) (1 << (4 * (chan) + 2)) +#define TCON_AUTORELOAD(chan) \ + ((chan < 5) ? _TCON_AUTORELOAD(chan) : _TCON_AUTORELOAD4(chan)) DEFINE_SPINLOCK(samsung_pwm_lock); EXPORT_SYMBOL(samsung_pwm_lock); struct samsung_pwm_clocksource { void __iomem *base; + void __iomem *source_reg; unsigned int irq[SAMSUNG_PWM_NUM]; struct samsung_pwm_variant variant; @@ -195,17 +207,6 @@ static int samsung_set_next_event(unsigned long cycles, return 0; } -static void samsung_timer_resume(void) -{ - /* event timer restart */ - samsung_time_setup(pwm.event_id, pwm.clock_count_per_tick - 1); - samsung_time_start(pwm.event_id, true); - - /* source timer restart */ - samsung_time_setup(pwm.source_id, pwm.tcnt_max); - samsung_time_start(pwm.source_id, true); -} - static void samsung_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { @@ -222,20 +223,29 @@ static void samsung_set_mode(enum clock_event_mode mode, case CLOCK_EVT_MODE_UNUSED: case CLOCK_EVT_MODE_SHUTDOWN: - break; - case CLOCK_EVT_MODE_RESUME: - samsung_timer_resume(); break; } } +static void samsung_clockevent_resume(struct clock_event_device *cev) +{ + samsung_timer_set_prescale(pwm.event_id, pwm.tscaler_div); + samsung_timer_set_divisor(pwm.event_id, pwm.tdiv); + + if (pwm.variant.has_tint_cstat) { + u32 mask = (1 << pwm.event_id); + writel(mask | (mask << 5), pwm.base + REG_TINT_CSTAT); + } +} + static struct clock_event_device time_event_device = { .name = "samsung_event_timer", .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .rating = 200, .set_next_event = samsung_set_next_event, .set_mode = samsung_set_mode, + .resume = samsung_clockevent_resume, }; static irqreturn_t samsung_clock_event_isr(int irq, void *dev_id) @@ -286,23 +296,34 @@ static void __init samsung_clockevent_init(void) } } -static void __iomem *samsung_timer_reg(void) +static void samsung_clocksource_suspend(struct clocksource *cs) { - switch (pwm.source_id) { - case 0: - case 1: - case 2: - case 3: - return pwm.base + pwm.source_id * 0x0c + 0x14; - - case 4: - return pwm.base + 0x40; - - default: - BUG(); - } + samsung_time_stop(pwm.source_id); } +static void samsung_clocksource_resume(struct clocksource *cs) +{ + samsung_timer_set_prescale(pwm.source_id, pwm.tscaler_div); + samsung_timer_set_divisor(pwm.source_id, pwm.tdiv); + + samsung_time_setup(pwm.source_id, pwm.tcnt_max); + samsung_time_start(pwm.source_id, true); +} + +static cycle_t samsung_clocksource_read(struct clocksource *c) +{ + return ~readl_relaxed(pwm.source_reg); +} + +static struct clocksource samsung_clocksource = { + .name = "samsung_clocksource_timer", + .rating = 250, + .read = samsung_clocksource_read, + .suspend = samsung_clocksource_suspend, + .resume = samsung_clocksource_resume, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + /* * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some @@ -312,17 +333,11 @@ static void __iomem *samsung_timer_reg(void) */ static u32 notrace samsung_read_sched_clock(void) { - void __iomem *reg = samsung_timer_reg(); - - if (!reg) - return 0; - - return ~__raw_readl(reg); + return samsung_clocksource_read(NULL); } static void __init samsung_clocksource_init(void) { - void __iomem *reg = samsung_timer_reg(); unsigned long pclk; unsigned long clock_rate; int ret; @@ -337,12 +352,16 @@ static void __init samsung_clocksource_init(void) samsung_time_setup(pwm.source_id, pwm.tcnt_max); samsung_time_start(pwm.source_id, true); + if (pwm.source_id == 4) + pwm.source_reg = pwm.base + 0x40; + else + pwm.source_reg = pwm.base + pwm.source_id * 0x0c + 0x14; + setup_sched_clock(samsung_read_sched_clock, pwm.variant.bits, clock_rate); - ret = clocksource_mmio_init(reg, "samsung_clocksource_timer", - clock_rate, 250, pwm.variant.bits, - clocksource_mmio_readl_down); + samsung_clocksource.mask = CLOCKSOURCE_MASK(pwm.variant.bits); + ret = clocksource_register_hz(&samsung_clocksource, clock_rate); if (ret) panic("samsung_clocksource_timer: can't register clocksource\n"); } @@ -404,7 +423,6 @@ void __init samsung_pwm_clocksource_init(void __iomem *base, static void __init samsung_pwm_alloc(struct device_node *np, const struct samsung_pwm_variant *variant) { - struct resource res; struct property *prop; const __be32 *cur; u32 val; @@ -423,17 +441,9 @@ static void __init samsung_pwm_alloc(struct device_node *np, pwm.variant.output_mask |= 1 << val; } - of_address_to_resource(np, 0, &res); - if (!request_mem_region(res.start, - resource_size(&res), "samsung-pwm")) { - pr_err("%s: failed to request IO mem region\n", __func__); - return; - } - - pwm.base = ioremap(res.start, resource_size(&res)); + pwm.base = of_iomap(np, 0); if (!pwm.base) { pr_err("%s: failed to map PWM registers\n", __func__); - release_mem_region(res.start, resource_size(&res)); return; } diff --git a/drivers/clocksource/time-armada-370-xp.c b/drivers/clocksource/time-armada-370-xp.c index 1b04b7e1d39b..847cab6f6e31 100644 --- a/drivers/clocksource/time-armada-370-xp.c +++ b/drivers/clocksource/time-armada-370-xp.c @@ -19,6 +19,7 @@ #include <linux/platform_device.h> #include <linux/kernel.h> #include <linux/clk.h> +#include <linux/cpu.h> #include <linux/timer.h> #include <linux/clockchips.h> #include <linux/interrupt.h> @@ -28,9 +29,9 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/sched_clock.h> - -#include <asm/localtimer.h> #include <linux/percpu.h> +#include <linux/time-armada-370-xp.h> + /* * Timer block registers. */ @@ -69,7 +70,7 @@ static bool timer25Mhz = true; */ static u32 ticks_per_jiffy; -static struct clock_event_device __percpu **percpu_armada_370_xp_evt; +static struct clock_event_device __percpu *armada_370_xp_evt; static u32 notrace armada_370_xp_read_sched_clock(void) { @@ -142,21 +143,14 @@ armada_370_xp_clkevt_mode(enum clock_event_mode mode, } } -static struct clock_event_device armada_370_xp_clkevt = { - .name = "armada_370_xp_per_cpu_tick", - .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, - .shift = 32, - .rating = 300, - .set_next_event = armada_370_xp_clkevt_next_event, - .set_mode = armada_370_xp_clkevt_mode, -}; +static int armada_370_xp_clkevt_irq; static irqreturn_t armada_370_xp_timer_interrupt(int irq, void *dev_id) { /* * ACK timer interrupt and call event handler. */ - struct clock_event_device *evt = *(struct clock_event_device **)dev_id; + struct clock_event_device *evt = dev_id; writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); evt->event_handler(evt); @@ -172,42 +166,55 @@ static int armada_370_xp_timer_setup(struct clock_event_device *evt) u32 u; int cpu = smp_processor_id(); - /* Use existing clock_event for cpu 0 */ - if (!smp_processor_id()) - return 0; - u = readl(local_base + TIMER_CTRL_OFF); if (timer25Mhz) writel(u | TIMER0_25MHZ, local_base + TIMER_CTRL_OFF); else writel(u & ~TIMER0_25MHZ, local_base + TIMER_CTRL_OFF); - evt->name = armada_370_xp_clkevt.name; - evt->irq = armada_370_xp_clkevt.irq; - evt->features = armada_370_xp_clkevt.features; - evt->shift = armada_370_xp_clkevt.shift; - evt->rating = armada_370_xp_clkevt.rating, + evt->name = "armada_370_xp_per_cpu_tick", + evt->features = CLOCK_EVT_FEAT_ONESHOT | + CLOCK_EVT_FEAT_PERIODIC; + evt->shift = 32, + evt->rating = 300, evt->set_next_event = armada_370_xp_clkevt_next_event, evt->set_mode = armada_370_xp_clkevt_mode, + evt->irq = armada_370_xp_clkevt_irq; evt->cpumask = cpumask_of(cpu); - *__this_cpu_ptr(percpu_armada_370_xp_evt) = evt; - clockevents_config_and_register(evt, timer_clk, 1, 0xfffffffe); enable_percpu_irq(evt->irq, 0); return 0; } -static void armada_370_xp_timer_stop(struct clock_event_device *evt) +static void armada_370_xp_timer_stop(struct clock_event_device *evt) { evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); disable_percpu_irq(evt->irq); } -static struct local_timer_ops armada_370_xp_local_timer_ops = { - .setup = armada_370_xp_timer_setup, - .stop = armada_370_xp_timer_stop, +static int armada_370_xp_timer_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +{ + /* + * Grab cpu pointer in each case to avoid spurious + * preemptible warnings + */ + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_STARTING: + armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); + break; + case CPU_DYING: + armada_370_xp_timer_stop(this_cpu_ptr(armada_370_xp_evt)); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block armada_370_xp_timer_cpu_nb = { + .notifier_call = armada_370_xp_timer_cpu_notify, }; void __init armada_370_xp_timer_init(void) @@ -223,9 +230,6 @@ void __init armada_370_xp_timer_init(void) if (of_find_property(np, "marvell,timer-25Mhz", NULL)) { /* The fixed 25MHz timer is available so let's use it */ - u = readl(local_base + TIMER_CTRL_OFF); - writel(u | TIMER0_25MHZ, - local_base + TIMER_CTRL_OFF); u = readl(timer_base + TIMER_CTRL_OFF); writel(u | TIMER0_25MHZ, timer_base + TIMER_CTRL_OFF); @@ -235,9 +239,6 @@ void __init armada_370_xp_timer_init(void) struct clk *clk = of_clk_get(np, 0); WARN_ON(IS_ERR(clk)); rate = clk_get_rate(clk); - u = readl(local_base + TIMER_CTRL_OFF); - writel(u & ~(TIMER0_25MHZ), - local_base + TIMER_CTRL_OFF); u = readl(timer_base + TIMER_CTRL_OFF); writel(u & ~(TIMER0_25MHZ), @@ -251,7 +252,7 @@ void __init armada_370_xp_timer_init(void) * We use timer 0 as clocksource, and private(local) timer 0 * for clockevents */ - armada_370_xp_clkevt.irq = irq_of_parse_and_map(np, 4); + armada_370_xp_clkevt_irq = irq_of_parse_and_map(np, 4); ticks_per_jiffy = (timer_clk + HZ / 2) / HZ; @@ -276,26 +277,19 @@ void __init armada_370_xp_timer_init(void) "armada_370_xp_clocksource", timer_clk, 300, 32, clocksource_mmio_readl_down); - /* Register the clockevent on the private timer of CPU 0 */ - armada_370_xp_clkevt.cpumask = cpumask_of(0); - clockevents_config_and_register(&armada_370_xp_clkevt, - timer_clk, 1, 0xfffffffe); + register_cpu_notifier(&armada_370_xp_timer_cpu_nb); - percpu_armada_370_xp_evt = alloc_percpu(struct clock_event_device *); + armada_370_xp_evt = alloc_percpu(struct clock_event_device); /* * Setup clockevent timer (interrupt-driven). */ - *__this_cpu_ptr(percpu_armada_370_xp_evt) = &armada_370_xp_clkevt; - res = request_percpu_irq(armada_370_xp_clkevt.irq, + res = request_percpu_irq(armada_370_xp_clkevt_irq, armada_370_xp_timer_interrupt, - armada_370_xp_clkevt.name, - percpu_armada_370_xp_evt); - if (!res) { - enable_percpu_irq(armada_370_xp_clkevt.irq, 0); -#ifdef CONFIG_LOCAL_TIMERS - local_timer_register(&armada_370_xp_local_timer_ops); -#endif - } + "armada_370_xp_per_cpu_tick", + armada_370_xp_evt); + /* Immediately configure the timer on the boot CPU */ + if (!res) + armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); } diff --git a/drivers/clocksource/timer-marco.c b/drivers/clocksource/timer-marco.c index 62876baa3ab9..09a17d9a6594 100644 --- a/drivers/clocksource/timer-marco.c +++ b/drivers/clocksource/timer-marco.c @@ -10,6 +10,7 @@ #include <linux/interrupt.h> #include <linux/clockchips.h> #include <linux/clocksource.h> +#include <linux/cpu.h> #include <linux/bitops.h> #include <linux/irq.h> #include <linux/clk.h> @@ -18,7 +19,6 @@ #include <linux/of_irq.h> #include <linux/of_address.h> #include <linux/sched_clock.h> -#include <asm/localtimer.h> #include <asm/mach/time.h> #define SIRFSOC_TIMER_32COUNTER_0_CTRL 0x0000 @@ -151,13 +151,7 @@ static void sirfsoc_clocksource_resume(struct clocksource *cs) BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL); } -static struct clock_event_device sirfsoc_clockevent = { - .name = "sirfsoc_clockevent", - .rating = 200, - .features = CLOCK_EVT_FEAT_ONESHOT, - .set_mode = sirfsoc_timer_set_mode, - .set_next_event = sirfsoc_timer_set_next_event, -}; +static struct clock_event_device __percpu *sirfsoc_clockevent; static struct clocksource sirfsoc_clocksource = { .name = "sirfsoc_clocksource", @@ -173,11 +167,8 @@ static struct irqaction sirfsoc_timer_irq = { .name = "sirfsoc_timer0", .flags = IRQF_TIMER | IRQF_NOBALANCING, .handler = sirfsoc_timer_interrupt, - .dev_id = &sirfsoc_clockevent, }; -#ifdef CONFIG_LOCAL_TIMERS - static struct irqaction sirfsoc_timer1_irq = { .name = "sirfsoc_timer1", .flags = IRQF_TIMER | IRQF_NOBALANCING, @@ -186,24 +177,28 @@ static struct irqaction sirfsoc_timer1_irq = { static int sirfsoc_local_timer_setup(struct clock_event_device *ce) { - /* Use existing clock_event for cpu 0 */ - if (!smp_processor_id()) - return 0; + int cpu = smp_processor_id(); + struct irqaction *action; + + if (cpu == 0) + action = &sirfsoc_timer_irq; + else + action = &sirfsoc_timer1_irq; - ce->irq = sirfsoc_timer1_irq.irq; + ce->irq = action->irq; ce->name = "local_timer"; - ce->features = sirfsoc_clockevent.features; - ce->rating = sirfsoc_clockevent.rating; + ce->features = CLOCK_EVT_FEAT_ONESHOT; + ce->rating = 200; ce->set_mode = sirfsoc_timer_set_mode; ce->set_next_event = sirfsoc_timer_set_next_event; - ce->shift = sirfsoc_clockevent.shift; - ce->mult = sirfsoc_clockevent.mult; - ce->max_delta_ns = sirfsoc_clockevent.max_delta_ns; - ce->min_delta_ns = sirfsoc_clockevent.min_delta_ns; + clockevents_calc_mult_shift(ce, CLOCK_TICK_RATE, 60); + ce->max_delta_ns = clockevent_delta2ns(-2, ce); + ce->min_delta_ns = clockevent_delta2ns(2, ce); + ce->cpumask = cpumask_of(cpu); - sirfsoc_timer1_irq.dev_id = ce; - BUG_ON(setup_irq(ce->irq, &sirfsoc_timer1_irq)); - irq_set_affinity(sirfsoc_timer1_irq.irq, cpumask_of(1)); + action->dev_id = ce; + BUG_ON(setup_irq(ce->irq, action)); + irq_set_affinity(action->irq, cpumask_of(cpu)); clockevents_register_device(ce); return 0; @@ -211,31 +206,48 @@ static int sirfsoc_local_timer_setup(struct clock_event_device *ce) static void sirfsoc_local_timer_stop(struct clock_event_device *ce) { + int cpu = smp_processor_id(); + sirfsoc_timer_count_disable(1); - remove_irq(sirfsoc_timer1_irq.irq, &sirfsoc_timer1_irq); + if (cpu == 0) + remove_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq); + else + remove_irq(sirfsoc_timer1_irq.irq, &sirfsoc_timer1_irq); } -static struct local_timer_ops sirfsoc_local_timer_ops = { - .setup = sirfsoc_local_timer_setup, - .stop = sirfsoc_local_timer_stop, +static int sirfsoc_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +{ + /* + * Grab cpu pointer in each case to avoid spurious + * preemptible warnings + */ + switch (action & ~CPU_TASKS_FROZEN) { + case CPU_STARTING: + sirfsoc_local_timer_setup(this_cpu_ptr(sirfsoc_clockevent)); + break; + case CPU_DYING: + sirfsoc_local_timer_stop(this_cpu_ptr(sirfsoc_clockevent)); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block sirfsoc_cpu_nb = { + .notifier_call = sirfsoc_cpu_notify, }; -#endif /* CONFIG_LOCAL_TIMERS */ static void __init sirfsoc_clockevent_init(void) { - clockevents_calc_mult_shift(&sirfsoc_clockevent, CLOCK_TICK_RATE, 60); - - sirfsoc_clockevent.max_delta_ns = - clockevent_delta2ns(-2, &sirfsoc_clockevent); - sirfsoc_clockevent.min_delta_ns = - clockevent_delta2ns(2, &sirfsoc_clockevent); - - sirfsoc_clockevent.cpumask = cpumask_of(0); - clockevents_register_device(&sirfsoc_clockevent); -#ifdef CONFIG_LOCAL_TIMERS - local_timer_register(&sirfsoc_local_timer_ops); -#endif + sirfsoc_clockevent = alloc_percpu(struct clock_event_device); + BUG_ON(!sirfsoc_clockevent); + + BUG_ON(register_cpu_notifier(&sirfsoc_cpu_nb)); + + /* Immediately configure the timer on the boot CPU */ + sirfsoc_local_timer_setup(this_cpu_ptr(sirfsoc_clockevent)); } /* initialize the kernel jiffy timer source */ @@ -273,8 +285,6 @@ static void __init sirfsoc_marco_timer_init(void) BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE)); - BUG_ON(setup_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq)); - sirfsoc_clockevent_init(); } @@ -288,11 +298,9 @@ static void __init sirfsoc_of_timer_init(struct device_node *np) if (!sirfsoc_timer_irq.irq) panic("No irq passed for timer0 via DT\n"); -#ifdef CONFIG_LOCAL_TIMERS sirfsoc_timer1_irq.irq = irq_of_parse_and_map(np, 1); if (!sirfsoc_timer1_irq.irq) panic("No irq passed for timer1 via DT\n"); -#endif sirfsoc_marco_timer_init(); } |