#include #include #include #include #include #include #include #include #include #include "soc.h" /************************************************************************* * Timer handling for EP93xx ************************************************************************* * The ep93xx has four internal timers. Timers 1, 2 (both 16 bit) and * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate * an interrupt on underflow. Timer 4 (40 bit) counts down at 983.04 kHz, * is free-running, and can't generate interrupts. * * The 508 kHz timers are ideal for use for the timer interrupt, as the * most common values of HZ divide 508 kHz nicely. We pick the 32 bit * timer (timer 3) to get as long sleep intervals as possible when using * CONFIG_NO_HZ. * * The higher clock rate of timer 4 makes it a better choice than the * other timers for use as clock source and for sched_clock(), providing * a stable 40 bit time base. ************************************************************************* */ #define EP93XX_TIMER_REG(x) (EP93XX_TIMER_BASE + (x)) #define EP93XX_TIMER1_LOAD EP93XX_TIMER_REG(0x00) #define EP93XX_TIMER1_VALUE EP93XX_TIMER_REG(0x04) #define EP93XX_TIMER1_CONTROL EP93XX_TIMER_REG(0x08) #define EP93XX_TIMER123_CONTROL_ENABLE (1 << 7) #define EP93XX_TIMER123_CONTROL_MODE (1 << 6) #define EP93XX_TIMER123_CONTROL_CLKSEL (1 << 3) #define EP93XX_TIMER1_CLEAR EP93XX_TIMER_REG(0x0c) #define EP93XX_TIMER2_LOAD EP93XX_TIMER_REG(0x20) #define EP93XX_TIMER2_VALUE EP93XX_TIMER_REG(0x24) #define EP93XX_TIMER2_CONTROL EP93XX_TIMER_REG(0x28) #define EP93XX_TIMER2_CLEAR EP93XX_TIMER_REG(0x2c) #define EP93XX_TIMER4_VALUE_LOW EP93XX_TIMER_REG(0x60) #define EP93XX_TIMER4_VALUE_HIGH EP93XX_TIMER_REG(0x64) #define EP93XX_TIMER4_VALUE_HIGH_ENABLE (1 << 8) #define EP93XX_TIMER3_LOAD EP93XX_TIMER_REG(0x80) #define EP93XX_TIMER3_VALUE EP93XX_TIMER_REG(0x84) #define EP93XX_TIMER3_CONTROL EP93XX_TIMER_REG(0x88) #define EP93XX_TIMER3_CLEAR EP93XX_TIMER_REG(0x8c) #define EP93XX_TIMER123_RATE 508469 #define EP93XX_TIMER4_RATE 983040 static u64 notrace ep93xx_read_sched_clock(void) { u64 ret; ret = readl(EP93XX_TIMER4_VALUE_LOW); ret |= ((u64) (readl(EP93XX_TIMER4_VALUE_HIGH) & 0xff) << 32); return ret; } u64 ep93xx_clocksource_read(struct clocksource *c) { u64 ret; ret = readl(EP93XX_TIMER4_VALUE_LOW); ret |= ((u64) (readl(EP93XX_TIMER4_VALUE_HIGH) & 0xff) << 32); return (u64) ret; } static int ep93xx_clkevt_set_next_event(unsigned long next, struct clock_event_device *evt) { /* Default mode: periodic, off, 508 kHz */ u32 tmode = EP93XX_TIMER123_CONTROL_MODE | EP93XX_TIMER123_CONTROL_CLKSEL; /* Clear timer */ writel(tmode, EP93XX_TIMER3_CONTROL); /* Set next event */ writel(next, EP93XX_TIMER3_LOAD); writel(tmode | EP93XX_TIMER123_CONTROL_ENABLE, EP93XX_TIMER3_CONTROL); return 0; } static int ep93xx_clkevt_shutdown(struct clock_event_device *evt) { /* Disable timer */ writel(0, EP93XX_TIMER3_CONTROL); return 0; } static struct clock_event_device ep93xx_clockevent = { .name = "timer1", .features = CLOCK_EVT_FEAT_ONESHOT, .set_state_shutdown = ep93xx_clkevt_shutdown, .set_state_oneshot = ep93xx_clkevt_shutdown, .tick_resume = ep93xx_clkevt_shutdown, .set_next_event = ep93xx_clkevt_set_next_event, .rating = 300, }; static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *evt = dev_id; /* Writing any value clears the timer interrupt */ writel(1, EP93XX_TIMER3_CLEAR); evt->event_handler(evt); return IRQ_HANDLED; } static struct irqaction ep93xx_timer_irq = { .name = "ep93xx timer", .flags = IRQF_TIMER | IRQF_IRQPOLL, .handler = ep93xx_timer_interrupt, .dev_id = &ep93xx_clockevent, }; void __init ep93xx_timer_init(void) { /* Enable and register clocksource and sched_clock on timer 4 */ writel(EP93XX_TIMER4_VALUE_HIGH_ENABLE, EP93XX_TIMER4_VALUE_HIGH); clocksource_mmio_init(NULL, "timer4", EP93XX_TIMER4_RATE, 200, 40, ep93xx_clocksource_read); sched_clock_register(ep93xx_read_sched_clock, 40, EP93XX_TIMER4_RATE); /* Set up clockevent on timer 3 */ setup_irq(IRQ_EP93XX_TIMER3, &ep93xx_timer_irq); clockevents_config_and_register(&ep93xx_clockevent, EP93XX_TIMER123_RATE, 1, 0xffffffffU); } d class='label'>mode:
authorTobias Klauser <tklauser@distanz.ch>2016-10-20 15:44:19 +0200
committerTobias Klauser <tklauser@distanz.ch>2017-02-15 10:34:18 +0100
commit5db4992d8f040b8d8db0b86d42806e0c417f7ccf (patch)
tree5b06e952af482d45f3ade64e77824662e34b7fa2 /arch/sparc/include/asm/mmu_context_32.h
parent370ebb0ef6255132373ed35d13e7b1d8d2eb7003 (diff)
usbnet: pegasus: Use net_device_stats from struct net_devicends-private-remove
Instead of using a private copy of struct net_device_stats in struct pegasus, use stats from struct net_device. Also remove the now unnecessary .ndo_get_stats function. Cc: Petko Manolov <petkan@nucleusys.com> Cc: linux-usb@vger.kernel.org Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'arch/sparc/include/asm/mmu_context_32.h')