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Revert "clocksource/drivers/tcb_clksrc: Use 32 bit tcb as sched_clock" 

This reverts commit 7b9f1d16e6 ("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>
hifive-unleashed-5.1
Romain Izard 2017-03-09 17:58:38 +01:00 committed by Daniel Lezcano
parent fa3aa7a54f
commit 33d8c15559
1 changed files with 1 additions and 15 deletions
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16
drivers/clocksource/tcb_clksrc.c
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@ -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.