int __init omap_init_clocksource_32k(void)
{
static char err[] __initdata = KERN_ERR
"%s: can't register clocksource!\n";
if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
u32 pbase;
unsigned long size = SZ_4K;
void __iomem *base;
struct clk *sync_32k_ick;
if (cpu_is_omap16xx()) {
pbase = OMAP16XX_TIMER_32K_SYNCHRONIZED;
size = SZ_1K;
} else if (cpu_is_omap2420())
pbase = OMAP2420_32KSYNCT_BASE + 0x10;
else if (cpu_is_omap2430())
pbase = OMAP2430_32KSYNCT_BASE + 0x10;
else if (cpu_is_omap34xx())
pbase = OMAP3430_32KSYNCT_BASE + 0x10;
else if (cpu_is_omap44xx())
pbase = OMAP4430_32KSYNCT_BASE + 0x10;
else if (cpu_is_omap54xx())
pbase = OMAP54XX_32KSYNCT_BASE + 0x30;
else
return -ENODEV;
/* For this to work we must have a static mapping in io.c for this area */
base = ioremap(pbase, size);
if (!base)
return -ENODEV;
sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
if (!IS_ERR(sync_32k_ick))
clk_enable(sync_32k_ick);
timer_32k_base = base;
/*
* 120000 rough estimate from the calculations in
* __clocksource_updatefreq_scale.
*/
clocks_calc_mult_shift(&persistent_mult, &persistent_shift,
32768, NSEC_PER_SEC, 120000);
if (clocksource_mmio_init(base, "32k_counter", 32768, 250, 32,
clocksource_mmio_readl_up))
printk(err, "32k_counter");
setup_sched_clock(omap_32k_read_sched_clock, 32, 32768);
}
return 0;
}
/* ****************************************************************** */
static void __gptimer_clocksource_init(const char *name, unsigned long hz)
{
/* disalbe irq since it's just a read source */
__raw_writel(0, TIMER_INT(SOURCE_TIMER));
__gptimer_ctl(SOURCE_TIMER, TIMER_DISABLE, PERIOD_MODE);
__raw_writel(ULONG_MAX, TIMER_LOAD(SOURCE_TIMER));
__gptimer_ctl(SOURCE_TIMER, TIMER_ENABLE, PERIOD_MODE);
clocksource_mmio_init(TIMER_VALUE(SOURCE_TIMER), name,
hz, 300, 32, clocksource_mmio_readl_down);
}
static void __init tegra_init_timer(void)
{
struct clk *clk;
int ret;
clk = clk_get_sys("timer", NULL);
BUG_ON(IS_ERR(clk));
clk_enable(clk);
/*
* rtc registers are used by read_persistent_clock, keep the rtc clock
* enabled
*/
clk = clk_get_sys("rtc-tegra", NULL);
BUG_ON(IS_ERR(clk));
clk_enable(clk);
#ifdef CONFIG_HAVE_ARM_TWD
twd_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x600);
#endif
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
tegra2_init_timer(&system_timer, &tegra_timer_irq.irq);
#else
tegra3_init_timer(&system_timer, &tegra_timer_irq.irq);
#endif
init_fixed_sched_clock(&cd, tegra_update_sched_clock, 32,
1000000, SC_MULT, SC_SHIFT);
if (clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
"timer_us", 1000000, 300, 32, clocksource_mmio_readl_up)) {
printk(KERN_ERR "Failed to register clocksource\n");
BUG();
}
ret = setup_irq(tegra_timer_irq.irq, &tegra_timer_irq);
if (ret) {
printk(KERN_ERR "Failed to register timer IRQ: %d\n", ret);
BUG();
}
clockevents_calc_mult_shift(&tegra_clockevent, 1000000, 5);
tegra_clockevent.max_delta_ns =
clockevent_delta2ns(0x1fffffff, &tegra_clockevent);
tegra_clockevent.min_delta_ns =
clockevent_delta2ns(0x1, &tegra_clockevent);
tegra_clockevent.cpumask = cpu_all_mask;
tegra_clockevent.irq = tegra_timer_irq.irq;
clockevents_register_device(&tegra_clockevent);
register_syscore_ops(&tegra_timer_syscore_ops);
}
static int __init mxs_clocksource_init(struct clk *timer_clk)
{
unsigned int c = clk_get_rate(timer_clk);
if (timrot_is_v1())
clocksource_register_hz(&clocksource_mxs, c);
else
clocksource_mmio_init(mxs_timrot_base + HW_TIMROT_RUNNING_COUNTn(1),
"mxs_timer", c, 200, 32, clocksource_mmio_readl_down);
return 0;
}
static void __init sun4i_timer_init(struct device_node *node)
{
unsigned long rate = 0;
struct clk *clk;
int ret, irq;
u32 val;
timer_base = of_iomap(node, 0);
if (!timer_base)
panic("Can't map registers");
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0)
panic("Can't parse IRQ");
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("Can't get timer clock");
clk_prepare_enable(clk);
rate = clk_get_rate(clk);
writel(~0, timer_base + TIMER_INTVAL_REG(1));
writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD |
TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
timer_base + TIMER_CTL_REG(1));
sched_clock_register(sun4i_timer_sched_read, 32, rate);
clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name,
rate, 350, 32, clocksource_mmio_readl_down);
ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
timer_base + TIMER_CTL_REG(0));
/* Make sure timer is stopped before playing with interrupts */
sun4i_clkevt_time_stop(0);
ret = setup_irq(irq, &sun4i_timer_irq);
if (ret)
pr_warn("failed to setup irq %d\n", irq);
/* Enable timer0 interrupt */
val = readl(timer_base + TIMER_IRQ_EN_REG);
writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG);
sun4i_clockevent.cpumask = cpu_possible_mask;
sun4i_clockevent.irq = irq;
clockevents_config_and_register(&sun4i_clockevent, rate,
TIMER_SYNC_TICKS, 0xffffffff);
}
void __init nmdk_timer_init(void)
{
unsigned long rate;
struct clk *clk0;
int ret;
clk0 = clk_get_sys("mtu0", NULL);
BUG_ON(IS_ERR(clk0));
ret = clk_prepare_enable(clk0);
BUG_ON(ret != 0);
/*
* Tick rate is 2.4MHz for Nomadik and 2.4Mhz, 100MHz or 133 MHz
* for ux500.
* Use a divide-by-16 counter if the tick rate is more than 32MHz.
* At 32 MHz, the timer (with 32 bit counter) can be programmed
* to wake-up at a max 127s a head in time. Dividing a 2.4 MHz timer
* with 16 gives too low timer resolution.
*/
rate = clk_get_rate(clk0);
if (rate > 32000000) {
rate /= 16;
clk_prescale = MTU_CRn_PRESCALE_16;
} else {
clk_prescale = MTU_CRn_PRESCALE_1;
}
nmdk_cycle = (rate + HZ/2) / HZ;
/* 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");
#ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK
setup_sched_clock(nomadik_read_sched_clock, 32, rate);
#endif
/* Timer 1 is used for events, register irq and clockevents */
setup_irq(IRQ_MTU0, &nmdk_timer_irq);
nmdk_clkevt.cpumask = cpumask_of(0);
clockevents_config_and_register(&nmdk_clkevt, rate, 2, 0xffffffffU);
#ifdef ARCH_HAS_READ_CURRENT_TIMER
set_delay_fn(nmdk_timer_delay_loop);
#endif
}
static void __init omap_init_clocksource(unsigned long rate)
{
omap_mpu_timer_regs_t __iomem *timer = omap_mpu_timer_base(1);
static char err[] __initdata = KERN_ERR
"%s: can't register clocksource!\n";
omap_mpu_timer_start(1, ~0, 1);
init_sched_clock(&cd, mpu_update_sched_clock, 32, rate);
if (clocksource_mmio_init(&timer->read_tim, "mpu_timer2", rate,
300, 32, clocksource_mmio_readl_down))
printk(err, "mpu_timer2");
}
static int __init sun4i_timer_init(struct device_node *node)
{
int ret;
u32 val;
ret = timer_of_init(node, &to);
if (ret)
return ret;
writel(~0, timer_of_base(&to) + TIMER_INTVAL_REG(1));
writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD |
TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
timer_of_base(&to) + TIMER_CTL_REG(1));
/*
* sched_clock_register does not have priorities, and on sun6i and
* later there is a better sched_clock registered by arm_arch_timer.c
*/
if (of_machine_is_compatible("allwinner,sun4i-a10") ||
of_machine_is_compatible("allwinner,sun5i-a13") ||
of_machine_is_compatible("allwinner,sun5i-a10s") ||
of_machine_is_compatible("allwinner,suniv-f1c100s"))
sched_clock_register(sun4i_timer_sched_read, 32,
timer_of_rate(&to));
ret = clocksource_mmio_init(timer_of_base(&to) + TIMER_CNTVAL_REG(1),
node->name, timer_of_rate(&to), 350, 32,
clocksource_mmio_readl_down);
if (ret) {
pr_err("Failed to register clocksource\n");
return ret;
}
writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M),
timer_of_base(&to) + TIMER_CTL_REG(0));
/* Make sure timer is stopped before playing with interrupts */
sun4i_clkevt_time_stop(timer_of_base(&to), 0);
/* clear timer0 interrupt */
sun4i_timer_clear_interrupt(timer_of_base(&to));
clockevents_config_and_register(&to.clkevt, timer_of_rate(&to),
TIMER_SYNC_TICKS, 0xffffffff);
/* Enable timer0 interrupt */
val = readl(timer_of_base(&to) + TIMER_IRQ_EN_REG);
writel(val | TIMER_IRQ_EN(0), timer_of_base(&to) + TIMER_IRQ_EN_REG);
return ret;
}
static void __init sun5i_timer_init(struct device_node *node)
{
struct reset_control *rstc;
unsigned long rate;
struct clk *clk;
int ret, irq;
u32 val;
timer_base = of_iomap(node, 0);
if (!timer_base)
panic("Can't map registers");
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0)
panic("Can't parse IRQ");
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("Can't get timer clock");
clk_prepare_enable(clk);
rate = clk_get_rate(clk);
rstc = of_reset_control_get(node, NULL);
if (!IS_ERR(rstc))
reset_control_deassert(rstc);
writel(~0, timer_base + TIMER_INTVAL_LO_REG(1));
writel(TIMER_CTL_ENABLE | TIMER_CTL_RELOAD,
timer_base + TIMER_CTL_REG(1));
sched_clock_register(sun5i_timer_sched_read, 32, rate);
clocksource_mmio_init(timer_base + TIMER_CNTVAL_LO_REG(1), node->name,
rate, 340, 32, clocksource_mmio_readl_down);
ticks_per_jiffy = DIV_ROUND_UP(rate, HZ);
ret = setup_irq(irq, &sun5i_timer_irq);
if (ret)
pr_warn("failed to setup irq %d\n", irq);
/* Enable timer0 interrupt */
val = readl(timer_base + TIMER_IRQ_EN_REG);
writel(val | TIMER_IRQ_EN(0), timer_base + TIMER_IRQ_EN_REG);
sun5i_clockevent.cpumask = cpu_possible_mask;
sun5i_clockevent.irq = irq;
clockevents_config_and_register(&sun5i_clockevent, rate,
TIMER_SYNC_TICKS, 0xffffffff);
}
static int __init fttmr010_timer_common_init(struct device_node *np)
{
int irq;
base = of_iomap(np, 0);
if (!base) {
pr_err("Can't remap registers");
return -ENXIO;
}
/* IRQ for timer 1 */
irq = irq_of_parse_and_map(np, 0);
if (irq <= 0) {
pr_err("Can't parse IRQ");
return -EINVAL;
}
/*
* Reset the interrupt mask and status
*/
writel(TIMER_INT_ALL_MASK, base + TIMER_INTR_MASK);
writel(0, base + TIMER_INTR_STATE);
writel(TIMER_DEFAULT_FLAGS, base + TIMER_CR);
/*
* Setup free-running clocksource timer (interrupts
* disabled.)
*/
writel(0, base + TIMER3_COUNT);
writel(0, base + TIMER3_LOAD);
writel(0, base + TIMER3_MATCH1);
writel(0, base + TIMER3_MATCH2);
clocksource_mmio_init(base + TIMER3_COUNT,
"fttmr010_clocksource", tick_rate,
300, 32, clocksource_mmio_readl_up);
sched_clock_register(fttmr010_read_sched_clock, 32, tick_rate);
/*
* Setup clockevent timer (interrupt-driven.)
*/
writel(0, base + TIMER1_COUNT);
writel(0, base + TIMER1_LOAD);
writel(0, base + TIMER1_MATCH1);
writel(0, base + TIMER1_MATCH2);
setup_irq(irq, &fttmr010_timer_irq);
fttmr010_clockevent.cpumask = cpumask_of(0);
clockevents_config_and_register(&fttmr010_clockevent, tick_rate,
1, 0xffffffff);
return 0;
}
static int __init mxc_clocksource_init(struct clk *timer_clk)
{
unsigned int c = clk_get_rate(timer_clk);
void __iomem *reg = timer_base + (timer_is_v2() ? V2_TCN : MX1_2_TCN);
imx_delay_timer.read_current_timer = &imx_read_current_timer;
imx_delay_timer.freq = c;
register_current_timer_delay(&imx_delay_timer);
sched_clock_reg = reg;
sched_clock_register(mxc_read_sched_clock, 32, c);
return clocksource_mmio_init(reg, "mxc_timer1", c, 200, 32,
clocksource_mmio_readl_up);
}
static int __init meson6_timer_init(struct device_node *node)
{
u32 val;
int ret, irq;
timer_base = of_io_request_and_map(node, 0, "meson6-timer");
if (IS_ERR(timer_base)) {
pr_err("Can't map registers\n");
return -ENXIO;
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
pr_err("Can't parse IRQ\n");
return -EINVAL;
}
/* Set 1us for timer E */
val = readl(timer_base + TIMER_ISA_MUX);
val &= ~TIMER_CSD_INPUT_MASK;
val |= TIMER_CSD_UNIT_1US << TIMER_INPUT_BIT(CSD_ID);
writel(val, timer_base + TIMER_ISA_MUX);
sched_clock_register(meson6_timer_sched_read, 32, USEC_PER_SEC);
clocksource_mmio_init(timer_base + TIMER_ISA_VAL(CSD_ID), node->name,
1000 * 1000, 300, 32, clocksource_mmio_readl_up);
/* Timer A base 1us */
val &= ~TIMER_CED_INPUT_MASK;
val |= TIMER_CED_UNIT_1US << TIMER_INPUT_BIT(CED_ID);
writel(val, timer_base + TIMER_ISA_MUX);
/* Stop the timer A */
meson6_clkevt_time_stop(CED_ID);
ret = setup_irq(irq, &meson6_timer_irq);
if (ret) {
pr_warn("failed to setup irq %d\n", irq);
return ret;
}
meson6_clockevent.cpumask = cpu_possible_mask;
meson6_clockevent.irq = irq;
clockevents_config_and_register(&meson6_clockevent, USEC_PER_SEC,
1, 0xfffe);
return 0;
}
static void integrator_clocksource_init(u32 khz)
{
void __iomem *base = (void __iomem *)TIMER2_VA_BASE;
u32 ctrl = TIMER_CTRL_ENABLE;
if (khz >= 1500) {
khz /= 16;
ctrl = TIMER_CTRL_DIV16;
}
writel(ctrl, base + TIMER_CTRL);
writel(0xffff, base + TIMER_LOAD);
clocksource_mmio_init(base + TIMER_VALUE, "timer2",
khz * 1000, 200, 16, clocksource_mmio_readl_down);
}
void __init sa1100_timer_init(void)
{
writel_relaxed(0, OIER);
writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
setup_sched_clock(sa1100_read_sched_clock, 32, 3686400);
ckevt_sa1100_osmr0.cpumask = cpumask_of(0);
setup_irq(IRQ_OST0, &sa1100_timer_irq);
clocksource_mmio_init(OSCR, "oscr", CLOCK_TICK_RATE, 200, 32,
clocksource_mmio_readl_up);
clockevents_config_and_register(&ckevt_sa1100_osmr0, 3686400,
MIN_OSCR_DELTA * 2, 0x7fffffff);
}
void __init sp804_clocksource_init(void __iomem *base, const char *name)
{
long rate = sp804_get_clock_rate(name);
if (rate < 0)
return;
/* 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);
clocksource_mmio_init(base + TIMER_VALUE, name,
rate, 200, 32, clocksource_mmio_readl_down);
}
void __init freerun_timer_init(void __iomem *base, unsigned int timer_irq)
{
clksrc_base = base;
/* setup timer 0 as free-running clocksource */
writel(0, clksrc_base + TIMER_CTRL);
writel(0xffffffff, clksrc_base + TIMER_LOAD);
writel(0xffffffff, clksrc_base + TIMER_VALUE);
writel(0xffffffff, clksrc_base + TIMER_BGLOAD);
writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC |
TIMER_CTRL_IE, clksrc_base + TIMER_CTRL);
setup_irq(timer_irq, &freerun_timer_irq);
clocksource_mmio_init(clksrc_base + TIMER_VALUE, "free-run-timer",
CONFIG_DEFAULT_TIMERCLK, 200, 32, clocksource_mmio_readl_down);
}
static void integrator_clocksource_init(unsigned long inrate)
{
void __iomem *base = (void __iomem *)TIMER2_VA_BASE;
u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
unsigned long rate = inrate;
if (rate >= 1500000) {
rate /= 16;
ctrl |= TIMER_CTRL_DIV16;
}
writel(0xffff, base + TIMER_LOAD);
writel(ctrl, base + TIMER_CTRL);
clocksource_mmio_init(base + TIMER_VALUE, "timer2",
rate, 200, 16, clocksource_mmio_readl_down);
}
static void __init moxart_timer_init(struct device_node *node)
{
int ret, irq;
unsigned long pclk;
struct clk *clk;
base = of_iomap(node, 0);
if (!base)
panic("%s: of_iomap failed\n", node->full_name);
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0)
panic("%s: irq_of_parse_and_map failed\n", node->full_name);
ret = setup_irq(irq, &moxart_timer_irq);
if (ret)
panic("%s: setup_irq failed\n", node->full_name);
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("%s: of_clk_get failed\n", node->full_name);
pclk = clk_get_rate(clk);
if (clocksource_mmio_init(base + TIMER2_BASE + REG_COUNT,
"moxart_timer", pclk, 200, 32,
clocksource_mmio_readl_down))
panic("%s: clocksource_mmio_init failed\n", node->full_name);
clock_count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ);
writel(~0, base + TIMER2_BASE + REG_LOAD);
writel(TIMEREG_CR_2_ENABLE, base + TIMER_CR);
moxart_clockevent.cpumask = cpumask_of(0);
moxart_clockevent.irq = irq;
/*
* documentation is not publicly available:
* min_delta / max_delta obtained by trial-and-error,
* max_delta 0xfffffffe should be ok because count
* register size is u32
*/
clockevents_config_and_register(&moxart_clockevent, pclk,
0x4, 0xfffffffe);
}
static void __init rps_clocksource_init(void __iomem *base, ulong ref_rate)
{
int ret;
ulong clock_rate;
/* use prescale 16 */
clock_rate = ref_rate / 16;
iowrite32(TIMER_MAX_VAL, base + TIMER_LOAD);
iowrite32(TIMER_PERIODIC | TIMER_ENABLE | TIMER_DIV16, base + TIMER_CTRL);
ret = clocksource_mmio_init(base + TIMER_CURR, "rps_clocksource_timer",
clock_rate, 250, TIMER_BITS,
clocksource_mmio_readl_down);
if (ret)
panic("can't register clocksource\n");
setup_sched_clock(rps_read_sched_clock, TIMER_BITS, clock_rate);
}
void __init pxa_timer_init(void)
{
unsigned long clock_tick_rate = get_clock_tick_rate();
writel_relaxed(0, OIER);
writel_relaxed(OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3, OSSR);
setup_sched_clock(pxa_read_sched_clock, 32, clock_tick_rate);
ckevt_pxa_osmr0.cpumask = cpumask_of(0);
setup_irq(IRQ_OST0, &pxa_ost0_irq);
clocksource_mmio_init(OSCR, "oscr0", clock_tick_rate, 200, 32,
clocksource_mmio_readl_up);
clockevents_config_and_register(&ckevt_pxa_osmr0, clock_tick_rate,
MIN_OSCR_DELTA * 2, 0x7fffffff);
}
/*
* Set up timer interrupt
*/
static void __init netx_timer_init(void)
{
/* disable timer initially */
writel(0, NETX_GPIO_COUNTER_CTRL(0));
/* Reset the timer value to zero */
writel(0, NETX_GPIO_COUNTER_CURRENT(0));
writel(LATCH, NETX_GPIO_COUNTER_MAX(0));
/* acknowledge interrupt */
writel(COUNTER_BIT(0), NETX_GPIO_IRQ);
/* Enable the interrupt in the specific timer
* register and start timer
*/
writel(COUNTER_BIT(0), NETX_GPIO_IRQ_ENABLE);
writel(NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN,
NETX_GPIO_COUNTER_CTRL(0));
setup_irq(NETX_IRQ_TIMER0, &netx_timer_irq);
/* Setup timer one for clocksource */
writel(0, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKSOURCE));
writel(0, NETX_GPIO_COUNTER_CURRENT(TIMER_CLOCKSOURCE));
writel(0xffffffff, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKSOURCE));
writel(NETX_GPIO_COUNTER_CTRL_RUN,
NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKSOURCE));
clocksource_mmio_init(NETX_GPIO_COUNTER_CURRENT(TIMER_CLOCKSOURCE),
"netx_timer", CLOCK_TICK_RATE, 200, 32, clocksource_mmio_readl_up);
netx_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC,
netx_clockevent.shift);
netx_clockevent.max_delta_ns =
clockevent_delta2ns(0xfffffffe, &netx_clockevent);
/* with max_delta_ns >= delta2ns(0x800) the system currently runs fine.
* Adding some safety ... */
netx_clockevent.min_delta_ns =
clockevent_delta2ns(0xa00, &netx_clockevent);
netx_clockevent.cpumask = cpumask_of(0);
clockevents_register_device(&netx_clockevent);
}
void __init
orion_time_init(u32 _bridge_base, u32 _bridge_timer1_clr_mask,
unsigned int irq, unsigned int tclk)
{
u32 u;
/*
*/
bridge_base = (void __iomem *)_bridge_base;
bridge_timer1_clr_mask = _bridge_timer1_clr_mask;
ticks_per_jiffy = (tclk + HZ/2) / HZ;
/*
*/
setup_sched_clock(orion_read_sched_clock, 32, tclk);
/*
*/
writel(0xffffffff, timer_base + TIMER0_VAL_OFF);
writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF);
u = readl(bridge_base + BRIDGE_MASK_OFF);
writel(u & ~BRIDGE_INT_TIMER0, bridge_base + BRIDGE_MASK_OFF);
u = readl(timer_base + TIMER_CTRL_OFF);
writel(u | TIMER0_EN | TIMER0_RELOAD_EN, timer_base + TIMER_CTRL_OFF);
clocksource_mmio_init(timer_base + TIMER0_VAL_OFF, "orion_clocksource",
tclk, 300, 32, clocksource_mmio_readl_down);
/*
*/
setup_irq(irq, &orion_timer_irq);
orion_clkevt.mult = div_sc(tclk, NSEC_PER_SEC, orion_clkevt.shift);
orion_clkevt.max_delta_ns = clockevent_delta2ns(0xfffffffe, &orion_clkevt);
orion_clkevt.min_delta_ns = clockevent_delta2ns(1, &orion_clkevt);
orion_clkevt.cpumask = cpumask_of(0);
clockevents_register_device(&orion_clkevt);
}
static void integrator_clocksource_init(unsigned long inrate,
void __iomem *base)
{
u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
unsigned long rate = inrate;
if (rate >= 1500000) {
rate /= 16;
ctrl |= TIMER_CTRL_DIV16;
}
writel(0xffff, base + TIMER_LOAD);
writel(ctrl, base + TIMER_CTRL);
clocksource_mmio_init(base + TIMER_VALUE, "timer2",
rate, 200, 16, clocksource_mmio_readl_down);
sched_clk_base = base;
sched_clock_register(integrator_read_sched_clock, 16, rate);
}
static void __init sa1100_timer_init(void)
{
OIER = 0;
OSSR = OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3;
setup_sched_clock(sa1100_read_sched_clock, 32, 3686400);
clockevents_calc_mult_shift(&ckevt_sa1100_osmr0, 3686400, 4);
ckevt_sa1100_osmr0.max_delta_ns =
clockevent_delta2ns(0x7fffffff, &ckevt_sa1100_osmr0);
ckevt_sa1100_osmr0.min_delta_ns =
clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_sa1100_osmr0) + 1;
ckevt_sa1100_osmr0.cpumask = cpumask_of(0);
setup_irq(IRQ_OST0, &sa1100_timer_irq);
clocksource_mmio_init(&OSCR, "oscr", CLOCK_TICK_RATE, 200, 32,
clocksource_mmio_readl_up);
clockevents_register_device(&ckevt_sa1100_osmr0);
}
static int __init _clps711x_clksrc_init(struct clk *clock, void __iomem *base)
{
unsigned long rate;
if (!base)
return -ENOMEM;
if (IS_ERR(clock))
return PTR_ERR(clock);
rate = clk_get_rate(clock);
tcd = base;
clocksource_mmio_init(tcd, "clps711x-clocksource", rate, 300, 16,
clocksource_mmio_readw_down);
sched_clock_register(clps711x_sched_clock_read, 16, rate);
return 0;
}
static int __init tcc_clockevent_init(struct clk *clock)
{
unsigned int c = clk_get_rate(clock);
clocksource_mmio_init(timer_base + TC32MCNT_OFFS, "tcc_tc32", c,
200, 32, clocksource_mmio_readl_up);
clockevent_tcc.mult = div_sc(c, NSEC_PER_SEC,
clockevent_tcc.shift);
clockevent_tcc.max_delta_ns =
clockevent_delta2ns(0xfffffffe, &clockevent_tcc);
clockevent_tcc.min_delta_ns =
clockevent_delta2ns(0xff, &clockevent_tcc);
clockevent_tcc.cpumask = cpumask_of(0);
clockevents_register_device(&clockevent_tcc);
return 0;
}
static void __init s5p_clocksource_init(void)
{
unsigned long pclk;
unsigned long clock_rate;
pclk = clk_get_rate(timerclk);
clk_set_rate(tdiv_source, pclk / 2);
clk_set_parent(tin_source, tdiv_source);
clock_rate = clk_get_rate(tin_source);
s5p_time_setup(timer_source.source_id, TCNT_MAX);
s5p_time_start(timer_source.source_id, PERIODIC);
setup_sched_clock(s5p_read_sched_clock, 32, clock_rate);
if (clocksource_mmio_init(s5p_timer_reg(), "s5p_clocksource_timer",
clock_rate, 250, 32, clocksource_mmio_readl_down))
panic("s5p_clocksource_timer: can't register clocksource\n");
}
static int __init ftm_clocksource_init(unsigned long freq)
{
int err;
ftm_writel(0x00, priv->clksrc_base + FTM_CNTIN);
ftm_writel(~0u, priv->clksrc_base + FTM_MOD);
ftm_reset_counter(priv->clksrc_base);
sched_clock_register(ftm_read_sched_clock, 16, freq / (1 << priv->ps));
err = clocksource_mmio_init(priv->clksrc_base + FTM_CNT, "fsl-ftm",
freq / (1 << priv->ps), 300, 16,
clocksource_mmio_readl_up);
if (err) {
pr_err("ftm: init clock source mmio failed: %d\n", err);
return err;
}
ftm_counter_enable(priv->clksrc_base);
return 0;
}
static void __init pxa_timer_init(void)
{
unsigned long clock_tick_rate = get_clock_tick_rate();
OIER = 0;
OSSR = OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3;
init_sched_clock(&cd, pxa_update_sched_clock, 32, clock_tick_rate);
clockevents_calc_mult_shift(&ckevt_pxa_osmr0, clock_tick_rate, 4);
ckevt_pxa_osmr0.max_delta_ns =
clockevent_delta2ns(0x7fffffff, &ckevt_pxa_osmr0);
ckevt_pxa_osmr0.min_delta_ns =
clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_pxa_osmr0) + 1;
ckevt_pxa_osmr0.cpumask = cpumask_of(0);
setup_irq(IRQ_OST0, &pxa_ost0_irq);
clocksource_mmio_init(&OSCR, "oscr0", clock_tick_rate, 200, 32,
clocksource_mmio_readl_up);
clockevents_register_device(&ckevt_pxa_osmr0);
}
void __init nmdk_timer_init(void __iomem *base)
{
unsigned long rate;
struct clk *clk0;
mtu_base = base;
clk0 = clk_get_sys("mtu0", NULL);
BUG_ON(IS_ERR(clk0));
BUG_ON(clk_prepare(clk0) < 0);
BUG_ON(clk_enable(clk0) < 0);
rate = clk_get_rate(clk0);
if (rate > 32000000) {
rate /= 16;
clk_prescale = MTU_CRn_PRESCALE_16;
} else {
clk_prescale = MTU_CRn_PRESCALE_1;
}
nmdk_cycle = (rate + HZ/2) / HZ;
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");
#ifdef CONFIG_NOMADIK_MTU_SCHED_CLOCK
setup_sched_clock(nomadik_read_sched_clock, 32, rate);
#endif
setup_irq(IRQ_MTU0, &nmdk_timer_irq);
nmdk_clkevt.cpumask = cpumask_of(0);
clockevents_config_and_register(&nmdk_clkevt, rate, 2, 0xffffffffU);
}