diff options
Diffstat (limited to 'arch/arm/mach-tegra/timer.c')
| -rw-r--r-- | arch/arm/mach-tegra/timer.c | 78 |
1 files changed, 53 insertions, 25 deletions
diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index d3b8c8e7368..e4863f3e9ee 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); } |