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clocksource/drivers/tcb_clksrc: Register delay timer 

Implement and register delay timer to allow get_cycles() to work properly.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Alexandre Belloni 2019-08-13 15:30:50 +02:00 committed by Daniel Lezcano
parent d9b51093cc
commit 1ce861cec0
2 changed files with 19 additions and 1 deletions
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2
drivers/clocksource/Kconfig
View File

@ -429,7 +429,7 @@ config ATMEL_ST
config ATMEL_TCB_CLKSRC
bool "Atmel TC Block timer driver" if COMPILE_TEST
depends on HAS_IOMEM
depends on ARM && HAS_IOMEM
select TIMER_OF if OF
help
Support for Timer Counter Blocks on Atmel SoCs.

18
drivers/clocksource/timer-atmel-tcb.c
View File

@ -6,6 +6,7 @@
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <linux/io.h>
@ -125,6 +126,18 @@ static u64 notrace tc_sched_clock_read32(void)
return tc_get_cycles32(&clksrc);
}
static struct delay_timer tc_delay_timer;
static unsigned long tc_delay_timer_read(void)
{
return tc_get_cycles(&clksrc);
}
static unsigned long notrace tc_delay_timer_read32(void)
{
return tc_get_cycles32(&clksrc);
}
#ifdef CONFIG_GENERIC_CLOCKEVENTS
struct tc_clkevt_device {
@ -432,6 +445,7 @@ static int __init tcb_clksrc_init(struct device_node *node)
/* setup ony channel 0 */
tcb_setup_single_chan(&tc, best_divisor_idx);
tc_sched_clock = tc_sched_clock_read32;
tc_delay_timer.read_current_timer = tc_delay_timer_read32;
} else {
/* we have three clocks no matter what the
* underlying platform supports.
@ -444,6 +458,7 @@ static int __init tcb_clksrc_init(struct device_node *node)
/* setup both channel 0 & 1 */
tcb_setup_dual_chan(&tc, best_divisor_idx);
tc_sched_clock = tc_sched_clock_read;
tc_delay_timer.read_current_timer = tc_delay_timer_read;
}
/* and away we go! */
@ -458,6 +473,9 @@ static int __init tcb_clksrc_init(struct device_node *node)
sched_clock_register(tc_sched_clock, 32, divided_rate);
tc_delay_timer.freq = divided_rate;
register_current_timer_delay(&tc_delay_timer);
return 0;
err_unregister_clksrc: