Re: [PATCH v2 11/13] clocksource: export the clocks_calc_mult_shift to use by timestamp code
From: Thomas Gleixner <hidden>
Date: 2016-11-29 09:11:41
Also in:
linux-devicetree, linux-omap, lkml
On Mon, 28 Nov 2016, Grygorii Strashko wrote:
From: Murali Karicheri <redacted> The CPSW CPTS driver is capable of doing timestamping on tx/rx packets and requires to know mult and shift factors for timestamp conversion from raw value to nanoseconds (ptp clock). Now these mult and shift factors are calculated manually and provided through DT, which makes very hard to support of a lot number of platforms, especially if CPTS refclk is not the same for some kind of boards and depends on efuse settings (Keystone 2 platforms). Hence, export clocks_calc_mult_shift() to allow drivers like CPSW CPTS (and other ptp drivesr) to benefit from automaitc calculation of mult and shift factors. Cc: John Stultz <redacted> Cc: Thomas Gleixner <redacted> Signed-off-by: Murali Karicheri <redacted> Signed-off-by: Grygorii Strashko <redacted>
Acked-by: Thomas Gleixner <redacted>
quoted hunk ↗ jump to hunk
--- kernel/time/clocksource.c | 1 + 1 file changed, 1 insertion(+)diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 7e4fad7..150242c 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c@@ -89,6 +89,7 @@ clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 maxsec) *mult = tmp; *shift = sft; } +EXPORT_SYMBOL_GPL(clocks_calc_mult_shift); /*[Clocksource internal variables]--------- * curr_clocksource:-- 2.10.1
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