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| author | Nicolas Chauvet <kwizart@gmail.com> | 2014-06-24 15:25:19 +0200 |
|---|---|---|
| committer | Nicolas Chauvet <kwizart@gmail.com> | 2014-07-07 16:21:19 +0200 |
| commit | 338f03e12fe730ad50871e47388bb92809ea48d0 (patch) | |
| tree | d608eacc065d12593e06ddfc9c66747b323c75ab | |
| parent | 886fb97677cdc0b089d83ecc37f13c892daa531e (diff) | |
| download | kernel-338f03e12fe730ad50871e47388bb92809ea48d0.tar.gz kernel-338f03e12fe730ad50871e47388bb92809ea48d0.tar.xz kernel-338f03e12fe730ad50871e47388bb92809ea48d0.zip | |
Add tegra-bp-delay-timer-3.17.patch
| -rw-r--r-- | tegra-bp-delay-timer-3.17.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tegra-bp-delay-timer-3.17.patch b/tegra-bp-delay-timer-3.17.patch new file mode 100644 index 00000000..5cb20aef --- /dev/null +++ b/tegra-bp-delay-timer-3.17.patch @@ -0,0 +1,59 @@ +From 0ff36b4f479ec8e0cd9b7a919ab877f2d553cd30 Mon Sep 17 00:00:00 2001 +From: Peter De Schrijver <pdeschrijver@nvidia.com> +Date: Thu, 12 Jun 2014 18:58:29 +0300 +Subject: clocksource: tegra: Use us counter as delay timer + +All Tegra SoCs have a freerunning microsecond counter which can be used as a +delay timer. + +Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> +Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> +Signed-off-by: Stephen Warren <swarren@nvidia.com> + +diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c +index d1869f0..d2616ef 100644 +--- a/drivers/clocksource/tegra20_timer.c ++++ b/drivers/clocksource/tegra20_timer.c +@@ -27,6 +27,7 @@ + #include <linux/of_address.h> + #include <linux/of_irq.h> + #include <linux/sched_clock.h> ++#include <linux/delay.h> + + #include <asm/mach/time.h> + #include <asm/smp_twd.h> +@@ -53,6 +54,8 @@ static void __iomem *rtc_base; + static struct timespec persistent_ts; + static u64 persistent_ms, last_persistent_ms; + ++static struct delay_timer tegra_delay_timer; ++ + #define timer_writel(value, reg) \ + __raw_writel(value, timer_reg_base + (reg)) + #define timer_readl(reg) \ +@@ -139,6 +142,11 @@ static void tegra_read_persistent_clock(struct timespec *ts) + *ts = *tsp; + } + ++static unsigned long tegra_delay_timer_read_counter_long(void) ++{ ++ return readl(timer_reg_base + TIMERUS_CNTR_1US); ++} ++ + static irqreturn_t tegra_timer_interrupt(int irq, void *dev_id) + { + struct clock_event_device *evt = (struct clock_event_device *)dev_id; +@@ -206,6 +214,11 @@ static void __init tegra20_init_timer(struct device_node *np) + BUG(); + } + ++ tegra_delay_timer.read_current_timer = ++ tegra_delay_timer_read_counter_long; ++ tegra_delay_timer.freq = 1000000; ++ register_current_timer_delay(&tegra_delay_timer); ++ + ret = setup_irq(tegra_timer_irq.irq, &tegra_timer_irq); + if (ret) { + pr_err("Failed to register timer IRQ: %d\n", ret); +-- +cgit v0.10.1 |