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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 03:43:12 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 03:43:12 (GMT) |
commit | 55392c4c06204c8149dc333309cf474691f1cc3c (patch) | |
tree | ac4ee3c3d1f9eb3acc185de08c3d3e784a57349c /drivers/clocksource/nomadik-mtu.c | |
parent | c410614c902531d1ce2e46aec8ac91aa4dc89968 (diff) | |
parent | 1f3b0f8243cb934307f59bd4d8e43b868e61d4d9 (diff) | |
download | linux-55392c4c06204c8149dc333309cf474691f1cc3c.tar.xz |
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"This update provides the following changes:
- The rework of the timer wheel which addresses the shortcomings of
the current wheel (cascading, slow search for next expiring timer,
etc). That's the first major change of the wheel in almost 20
years since Finn implemted it.
- A large overhaul of the clocksource drivers init functions to
consolidate the Device Tree initialization
- Some more Y2038 updates
- A capability fix for timerfd
- Yet another clock chip driver
- The usual pile of updates, comment improvements all over the place"
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (130 commits)
tick/nohz: Optimize nohz idle enter
clockevents: Make clockevents_subsys static
clocksource/drivers/time-armada-370-xp: Fix return value check
timers: Implement optimization for same expiry time in mod_timer()
timers: Split out index calculation
timers: Only wake softirq if necessary
timers: Forward the wheel clock whenever possible
timers/nohz: Remove pointless tick_nohz_kick_tick() function
timers: Optimize collect_expired_timers() for NOHZ
timers: Move __run_timers() function
timers: Remove set_timer_slack() leftovers
timers: Switch to a non-cascading wheel
timers: Reduce the CPU index space to 256k
timers: Give a few structs and members proper names
hlist: Add hlist_is_singular_node() helper
signals: Use hrtimer for sigtimedwait()
timers: Remove the deprecated mod_timer_pinned() API
timers, net/ipv4/inet: Initialize connection request timers as pinned
timers, drivers/tty/mips_ejtag: Initialize the poll timer as pinned
timers, drivers/tty/metag_da: Initialize the poll timer as pinned
...
Diffstat (limited to 'drivers/clocksource/nomadik-mtu.c')
-rw-r--r-- | drivers/clocksource/nomadik-mtu.c | 43 |
1 files changed, 28 insertions, 15 deletions
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c index bc8dd44..3c124d1 100644 --- a/drivers/clocksource/nomadik-mtu.c +++ b/drivers/clocksource/nomadik-mtu.c @@ -193,10 +193,11 @@ static struct irqaction nmdk_timer_irq = { .dev_id = &nmdk_clkevt, }; -static void __init nmdk_timer_init(void __iomem *base, int irq, +static int __init nmdk_timer_init(void __iomem *base, int irq, struct clk *pclk, struct clk *clk) { unsigned long rate; + int ret; mtu_base = base; @@ -226,10 +227,12 @@ static void __init nmdk_timer_init(void __iomem *base, int irq, /* Timer 0 is the free running clocksource */ nmdk_clksrc_reset(); - if (clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0", - rate, 200, 32, clocksource_mmio_readl_down)) - pr_err("timer: failed to initialize clock source %s\n", - "mtu_0"); + ret = clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0", + rate, 200, 32, clocksource_mmio_readl_down); + if (ret) { + pr_err("timer: failed to initialize clock source %s\n", "mtu_0"); + return ret; + } #ifdef CONFIG_CLKSRC_NOMADIK_MTU_SCHED_CLOCK sched_clock_register(nomadik_read_sched_clock, 32, rate); @@ -244,9 +247,11 @@ static void __init nmdk_timer_init(void __iomem *base, int irq, mtu_delay_timer.read_current_timer = &nmdk_timer_read_current_timer; mtu_delay_timer.freq = rate; register_current_timer_delay(&mtu_delay_timer); + + return 0; } -static void __init nmdk_timer_of_init(struct device_node *node) +static int __init nmdk_timer_of_init(struct device_node *node) { struct clk *pclk; struct clk *clk; @@ -254,22 +259,30 @@ static void __init nmdk_timer_of_init(struct device_node *node) int irq; base = of_iomap(node, 0); - if (!base) - panic("Can't remap registers"); + if (!base) { + pr_err("Can't remap registers"); + return -ENXIO; + } pclk = of_clk_get_by_name(node, "apb_pclk"); - if (IS_ERR(pclk)) - panic("could not get apb_pclk"); + if (IS_ERR(pclk)) { + pr_err("could not get apb_pclk"); + return PTR_ERR(pclk); + } clk = of_clk_get_by_name(node, "timclk"); - if (IS_ERR(clk)) - panic("could not get timclk"); + if (IS_ERR(clk)) { + pr_err("could not get timclk"); + return PTR_ERR(clk); + } irq = irq_of_parse_and_map(node, 0); - if (irq <= 0) - panic("Can't parse IRQ"); + if (irq <= 0) { + pr_err("Can't parse IRQ"); + return -EINVAL; + } - nmdk_timer_init(base, irq, pclk, clk); + return nmdk_timer_init(base, irq, pclk, clk); } CLOCKSOURCE_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu", nmdk_timer_of_init); |