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| author | Lee Jones <lee.jones@linaro.org> | 2015-05-12 14:58:11 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2015-07-23 18:07:26 +0200 |
| commit | ff45d8dd84dbb6e674e3757a07ef9471568c2e94 (patch) | |
| tree | ea23390171e369b0f248f0326e358ff28b6ed4f7 /drivers/clocksource/clksrc_st_lpc.c | |
| parent | clocksource: sti: Provide support for the ST LPC Clocksource IP (diff) | |
| download | linux-ff45d8dd84dbb6e674e3757a07ef9471568c2e94.tar.xz linux-ff45d8dd84dbb6e674e3757a07ef9471568c2e94.zip | |
clocksource: sti: Provide 'use timer as sched clock' capability
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/clocksource/clksrc_st_lpc.c')
| -rw-r--r-- | drivers/clocksource/clksrc_st_lpc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c index f38cf33281a2..65ec4674416d 100644 --- a/drivers/clocksource/clksrc_st_lpc.c +++ b/drivers/clocksource/clksrc_st_lpc.c @@ -16,6 +16,7 @@ #include <linux/clocksource.h> #include <linux/init.h> #include <linux/of_address.h> +#include <linux/sched_clock.h> #include <linux/slab.h> #include <dt-bindings/mfd/st-lpc.h> @@ -38,6 +39,11 @@ static void __init st_clksrc_reset(void) writel_relaxed(1, ddata.base + LPC_LPT_START_OFF); } +static u64 notrace st_clksrc_sched_clock_read(void) +{ + return (u64)readl_relaxed(ddata.base + LPC_LPT_LSB_OFF); +} + static int __init st_clksrc_init(void) { unsigned long rate; @@ -47,6 +53,8 @@ static int __init st_clksrc_init(void) rate = clk_get_rate(ddata.clk); + sched_clock_register(st_clksrc_sched_clock_read, 32, rate); + ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF, "clksrc-st-lpc", rate, 300, 32, clocksource_mmio_readl_up); |