diff options
Diffstat (limited to 'arch/arm/mach-tcc8k/time.c')
-rw-r--r-- | arch/arm/mach-tcc8k/time.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/arch/arm/mach-tcc8k/time.c b/arch/arm/mach-tcc8k/time.c deleted file mode 100644 index a96babe..0000000 --- a/arch/arm/mach-tcc8k/time.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * TCC8000 system timer setup - * - * (C) 2009 Hans J. Koch <hjk@linutronix.de> - * - * Licensed under the terms of the GPL version 2. - * - */ - -#include <linux/clk.h> -#include <linux/clockchips.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/kernel.h> -#include <linux/spinlock.h> - -#include <asm/mach/time.h> - -#include <mach/tcc8k-regs.h> -#include <mach/irqs.h> - -#include "common.h" - -static void __iomem *timer_base; - -static int tcc_set_next_event(unsigned long evt, - struct clock_event_device *unused) -{ - unsigned long reg = __raw_readl(timer_base + TC32MCNT_OFFS); - - __raw_writel(reg + evt, timer_base + TC32CMP0_OFFS); - return 0; -} - -static void tcc_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - unsigned long tc32irq; - - switch (mode) { - case CLOCK_EVT_MODE_ONESHOT: - tc32irq = __raw_readl(timer_base + TC32IRQ_OFFS); - tc32irq |= TC32IRQ_IRQEN0; - __raw_writel(tc32irq, timer_base + TC32IRQ_OFFS); - break; - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_UNUSED: - tc32irq = __raw_readl(timer_base + TC32IRQ_OFFS); - tc32irq &= ~TC32IRQ_IRQEN0; - __raw_writel(tc32irq, timer_base + TC32IRQ_OFFS); - break; - case CLOCK_EVT_MODE_PERIODIC: - case CLOCK_EVT_MODE_RESUME: - break; - } -} - -static irqreturn_t tcc8k_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; - - /* Acknowledge TC32 interrupt by reading TC32IRQ */ - __raw_readl(timer_base + TC32IRQ_OFFS); - - evt->event_handler(evt); - - return IRQ_HANDLED; -} - -static struct clock_event_device clockevent_tcc = { - .name = "tcc_timer1", - .features = CLOCK_EVT_FEAT_ONESHOT, - .shift = 32, - .set_mode = tcc_set_mode, - .set_next_event = tcc_set_next_event, - .rating = 200, -}; - -static struct irqaction tcc8k_timer_irq = { - .name = "TC32_timer", - .flags = IRQF_DISABLED | IRQF_TIMER, - .handler = tcc8k_timer_interrupt, - .dev_id = &clockevent_tcc, -}; - -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; -} - -void __init tcc8k_timer_init(struct clk *clock, void __iomem *base, int irq) -{ - u32 reg; - - timer_base = base; - tcc8k_timer_irq.irq = irq; - - /* Enable clocks */ - clk_enable(clock); - - /* Initialize 32-bit timer */ - reg = __raw_readl(timer_base + TC32EN_OFFS); - reg &= ~TC32EN_ENABLE; /* Disable timer */ - __raw_writel(reg, timer_base + TC32EN_OFFS); - /* Free running timer, counting from 0 to 0xffffffff */ - __raw_writel(0, timer_base + TC32EN_OFFS); - __raw_writel(0, timer_base + TC32LDV_OFFS); - reg = __raw_readl(timer_base + TC32IRQ_OFFS); - reg |= TC32IRQ_IRQEN0; /* irq at match with CMP0 */ - __raw_writel(reg, timer_base + TC32IRQ_OFFS); - - __raw_writel(TC32EN_ENABLE, timer_base + TC32EN_OFFS); - - tcc_clockevent_init(clock); - setup_irq(irq, &tcc8k_timer_irq); -} |