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Diffstat (limited to 'target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/timer.c')
-rw-r--r--target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/timer.c135
1 files changed, 0 insertions, 135 deletions
diff --git a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/timer.c b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/timer.c
deleted file mode 100644
index 571f9e8..0000000
--- a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/timer.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- * Moschip MCS814x timer routines
- *
- * Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
- *
- * Licensed under GPLv2
- */
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/timex.h>
-#include <linux/irq.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-
-#include <asm/mach/time.h>
-#include <mach/mcs814x.h>
-
-/* Timer block registers */
-#define TIMER_VAL 0x00
-#define TIMER_CTL 0x04
-#define TIMER_CTL_EN 0x01
-#define TIMER_CTL_DBG 0x02
-
-static u32 last_reload;
-static u32 timer_correct;
-static u32 clock_rate;
-static u32 timer_reload_value;
-static void __iomem *mcs814x_timer_base;
-
-static inline unsigned long ticks2usecs(u32 x)
-{
- return x / (clock_rate / 1000000);
-}
-
-/*
- * Returns number of ms since last clock interrupt. Note that interrupts
- * will have been disabled by do_gettimeoffset()
- */
-static unsigned long mcs814x_gettimeoffset(void)
-{
- u32 ticks = readl_relaxed(mcs814x_timer_base + TIMER_VAL);
-
- if (ticks < last_reload)
- return ticks2usecs(ticks + (u32)(0xffffffff - last_reload));
- else
- return ticks2usecs(ticks - last_reload);
-}
-
-
-static irqreturn_t mcs814x_timer_interrupt(int irq, void *dev_id)
-{
- u32 count = readl_relaxed(mcs814x_timer_base + TIMER_VAL);
-
- /* take into account delay up to this moment */
- last_reload = count + timer_correct + timer_reload_value;
-
- if (last_reload < timer_reload_value) {
- last_reload = timer_reload_value;
- } else {
- if (timer_correct == 0)
- timer_correct = readl_relaxed(mcs814x_timer_base + TIMER_VAL) - count;
- }
- writel_relaxed(last_reload, mcs814x_timer_base + TIMER_VAL);
-
- timer_tick();
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction mcs814x_timer_irq = {
- .name = "mcs814x-timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = mcs814x_timer_interrupt,
-};
-
-static struct of_device_id mcs814x_timer_ids[] = {
- { .compatible = "moschip,mcs814x-timer" },
- { /* sentinel */ },
-};
-
-static void __init mcs814x_of_timer_init(void)
-{
- struct device_node *np;
- const unsigned int *intspec;
-
- np = of_find_matching_node(NULL, mcs814x_timer_ids);
- if (!np)
- panic("unable to find compatible timer node in dtb");
-
- mcs814x_timer_base = of_iomap(np, 0);
- if (!mcs814x_timer_base)
- panic("unable to remap timer cpu registers");
-
- intspec = of_get_property(np, "interrupts", NULL);
- if (!intspec)
- panic("no interrupts property for timer");
-
- mcs814x_timer_irq.irq = be32_to_cpup(intspec);
-}
-
-static void __init mcs814x_timer_init(void)
-{
- struct clk *clk;
-
- clk = clk_get_sys("timer0", NULL);
- if (IS_ERR_OR_NULL(clk))
- panic("unable to get timer0 clock");
-
- clock_rate = clk_get_rate(clk);
-
- mcs814x_of_timer_init();
-
- pr_info("Timer frequency: %d (kHz)\n", clock_rate / 1000);
-
- timer_reload_value = 0xffffffff - (clock_rate / HZ);
-
- /* disable timer */
- writel_relaxed(~TIMER_CTL_EN, mcs814x_timer_base + TIMER_CTL);
- writel_relaxed(timer_reload_value, mcs814x_timer_base + TIMER_VAL);
- last_reload = timer_reload_value;
-
- setup_irq(mcs814x_timer_irq.irq, &mcs814x_timer_irq);
- /* enable timer, stop timer in debug mode */
- writel_relaxed(TIMER_CTL_EN | TIMER_CTL_DBG,
- mcs814x_timer_base + TIMER_CTL);
-}
-
-struct sys_timer mcs814x_timer = {
- .init = mcs814x_timer_init,
- .offset = mcs814x_gettimeoffset,
-};