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authorRomain Izard <romain.izard.pro@gmail.com>2017-03-09 17:58:38 +0100
committerDaniel Lezcano <daniel.lezcano@linaro.org>2017-03-11 22:03:34 +0100
commit33d8c15559df4f0bce25d7e16ebb5879e249f2e7 (patch)
tree1dcd2b6a5ad10962a10bbb4bb224549e60be6ef7
parentfa3aa7a54fe6d3abf128f13cd4bbd40eaa48fed2 (diff)
Revert "clocksource/drivers/tcb_clksrc: Use 32 bit tcb as sched_clock"
This reverts commit 7b9f1d16e6d1 ("clocksource/drivers/tcb_clksrc: Use 32 bit tcb as sched_clock"). In the current state, the kernel warns against a late registration of the new sched_clock, the printk clock resets after only a few minutes, and it seems that scheduling can be affected as well. Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r--drivers/clocksource/tcb_clksrc.c16
1 files changed, 1 insertions, 15 deletions
diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c
index 745844ee973e..d4ca9962a759 100644
--- a/drivers/clocksource/tcb_clksrc.c
+++ b/drivers/clocksource/tcb_clksrc.c
@@ -10,7 +10,6 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/atmel_tc.h>
-#include <linux/sched_clock.h>
/*
@@ -57,14 +56,9 @@ static u64 tc_get_cycles(struct clocksource *cs)
return (upper << 16) | lower;
}
-static u32 tc_get_cv32(void)
-{
- return __raw_readl(tcaddr + ATMEL_TC_REG(0, CV));
-}
-
static u64 tc_get_cycles32(struct clocksource *cs)
{
- return tc_get_cv32();
+ return __raw_readl(tcaddr + ATMEL_TC_REG(0, CV));
}
static struct clocksource clksrc = {
@@ -75,11 +69,6 @@ static struct clocksource clksrc = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static u64 notrace tc_read_sched_clock(void)
-{
- return tc_get_cv32();
-}
-
#ifdef CONFIG_GENERIC_CLOCKEVENTS
struct tc_clkevt_device {
@@ -350,9 +339,6 @@ static int __init tcb_clksrc_init(void)
clksrc.read = tc_get_cycles32;
/* setup ony channel 0 */
tcb_setup_single_chan(tc, best_divisor_idx);
-
- /* register sched_clock on chips with single 32 bit counter */
- sched_clock_register(tc_read_sched_clock, 32, divided_rate);
} else {
/* tclib will give us three clocks no matter what the
* underlying platform supports.