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Diffstat (limited to 'arch/arm/mach-tegra/timer.c')
-rw-r--r--arch/arm/mach-tegra/timer.c78
1 files changed, 53 insertions, 25 deletions
diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
index d3b8c8e7368f..e4863f3e9ee7 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/arch/arm/mach-tegra/timer.c
@@ -26,16 +26,14 @@
#include <linux/clocksource.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <asm/mach/time.h>
#include <asm/smp_twd.h>
#include <asm/sched_clock.h>
-#include <mach/iomap.h>
-#include <mach/irqs.h>
-
#include "board.h"
-#include "clock.h"
#define RTC_SECONDS 0x08
#define RTC_SHADOW_SECONDS 0x0c
@@ -53,8 +51,8 @@
#define TIMER_PTV 0x0
#define TIMER_PCR 0x4
-static void __iomem *timer_reg_base = IO_ADDRESS(TEGRA_TMR1_BASE);
-static void __iomem *rtc_base = IO_ADDRESS(TEGRA_RTC_BASE);
+static void __iomem *timer_reg_base;
+static void __iomem *rtc_base;
static struct timespec persistent_ts;
static u64 persistent_ms, last_persistent_ms;
@@ -158,40 +156,66 @@ static struct irqaction tegra_timer_irq = {
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_HIGH,
.handler = tegra_timer_interrupt,
.dev_id = &tegra_clockevent,
- .irq = INT_TMR3,
};
-#ifdef CONFIG_HAVE_ARM_TWD
-static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
- TEGRA_ARM_PERIF_BASE + 0x600,
- IRQ_LOCALTIMER);
+static const struct of_device_id timer_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-timer" },
+ {}
+};
-static void __init tegra_twd_init(void)
-{
- int err = twd_local_timer_register(&twd_local_timer);
- if (err)
- pr_err("twd_local_timer_register failed %d\n", err);
-}
-#else
-#define tegra_twd_init() do {} while(0)
-#endif
+static const struct of_device_id rtc_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-rtc" },
+ {}
+};
static void __init tegra_init_timer(void)
{
+ struct device_node *np;
struct clk *clk;
unsigned long rate;
int ret;
+ np = of_find_matching_node(NULL, timer_match);
+ if (!np) {
+ pr_err("Failed to find timer DT node\n");
+ BUG();
+ }
+
+ timer_reg_base = of_iomap(np, 0);
+ if (!timer_reg_base) {
+ pr_err("Can't map timer registers");
+ BUG();
+ }
+
+ tegra_timer_irq.irq = irq_of_parse_and_map(np, 2);
+ if (tegra_timer_irq.irq <= 0) {
+ pr_err("Failed to map timer IRQ\n");
+ BUG();
+ }
+
clk = clk_get_sys("timer", NULL);
if (IS_ERR(clk)) {
- pr_warn("Unable to get timer clock."
- " Assuming 12Mhz input clock.\n");
+ pr_warn("Unable to get timer clock. Assuming 12Mhz input clock.\n");
rate = 12000000;
} else {
clk_prepare_enable(clk);
rate = clk_get_rate(clk);
}
+ of_node_put(np);
+
+ np = of_find_matching_node(NULL, rtc_match);
+ if (!np) {
+ pr_err("Failed to find RTC DT node\n");
+ BUG();
+ }
+
+ rtc_base = of_iomap(np, 0);
+ if (!rtc_base) {
+ pr_err("Can't map RTC registers");
+ BUG();
+ }
+
/*
* rtc registers are used by read_persistent_clock, keep the rtc clock
* enabled
@@ -202,6 +226,8 @@ static void __init tegra_init_timer(void)
else
clk_prepare_enable(clk);
+ of_node_put(np);
+
switch (rate) {
case 12000000:
timer_writel(0x000b, TIMERUS_USEC_CFG);
@@ -223,13 +249,13 @@ static void __init tegra_init_timer(void)
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");
+ pr_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);
+ pr_err("Failed to register timer IRQ: %d\n", ret);
BUG();
}
@@ -241,7 +267,9 @@ static void __init tegra_init_timer(void)
tegra_clockevent.cpumask = cpu_all_mask;
tegra_clockevent.irq = tegra_timer_irq.irq;
clockevents_register_device(&tegra_clockevent);
- tegra_twd_init();
+#ifdef CONFIG_HAVE_ARM_TWD
+ twd_local_timer_of_register();
+#endif
register_persistent_clock(NULL, tegra_read_persistent_clock);
}