diff options
| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-08-13 16:30:50 +0300 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2019-08-27 01:31:39 +0300 |
| commit | 1ce861cec03c79a68bae81a7e039edae46b2c493 (patch) | |
| tree | c0e372f795675c172c0a48d7edd4f466d1d482df /drivers | |
| parent | d9b51093cca430f75a054d78eb35a6e13c1540cb (diff) | |
| download | linux-1ce861cec03c79a68bae81a7e039edae46b2c493.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clocksource/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/clocksource/timer-atmel-tcb.c | 18 |
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 5e9317dc3d39..a642c23b2fba 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -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. diff --git a/drivers/clocksource/timer-atmel-tcb.c b/drivers/clocksource/timer-atmel-tcb.c index 6ed31f9def7e..7427b07495a8 100644 --- a/drivers/clocksource/timer-atmel-tcb.c +++ b/drivers/clocksource/timer-atmel-tcb.c @@ -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: |