diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-10-23 11:40:25 -0600 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2012-11-16 12:22:17 -0700 |
| commit | 3a04931e3b6230926ebe200192545a8d952d787d (patch) | |
| tree | dfd80f9f4d3219c49ee62f8bd2e5c3448aaa0930 /arch/arm/mach-tegra | |
| parent | 56415480e90a6ba31e9fdda2cc860c3fcaa80acc (diff) | |
| download | linux-3a04931e3b6230926ebe200192545a8d952d787d.tar.bz2 | |
ARM: tegra: enhance timer.c to get IO address from device tree
Modify Tegra's timer code to parse the IO address from device tree,
hence removing the dependency on <mach/iomap.h>. This will allow the
driver to be moved to drivers/clocksource/.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/timer.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c index 026bad4ac57a..e4863f3e9ee7 100644 --- a/arch/arm/mach-tegra/timer.c +++ b/arch/arm/mach-tegra/timer.c @@ -26,6 +26,7 @@ #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> @@ -33,8 +34,6 @@ #include <asm/sched_clock.h> #include "board.h" -#include "clock.h" -#include "iomap.h" #define RTC_SECONDS 0x08 #define RTC_SHADOW_SECONDS 0x0c @@ -52,8 +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; @@ -164,6 +163,11 @@ static const struct of_device_id timer_match[] __initconst = { {} }; +static const struct of_device_id rtc_match[] __initconst = { + { .compatible = "nvidia,tegra20-rtc" }, + {} +}; + static void __init tegra_init_timer(void) { struct device_node *np; @@ -177,6 +181,12 @@ static void __init tegra_init_timer(void) 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"); @@ -192,6 +202,20 @@ static void __init tegra_init_timer(void) 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 |