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authorNicolai Stange <nicstange@gmail.com>2017-03-30 21:47:32 +0200
committerJohn Stultz <john.stultz@linaro.org>2017-04-14 22:11:16 +0200
commite4db9253d6b4c1d927254f1c4bef875573229502 (patch)
treec594e4984dacec3c7c7725ad20e5a4fb94a171b3 /arch/mips/ralink
parentclockevents/drivers/atlas7: Set ->min_delta_ticks and ->max_delta_ticks (diff)
downloadlinux-e4db9253d6b4c1d927254f1c4bef875573229502.tar.xz
linux-e4db9253d6b4c1d927254f1c4bef875573229502.zip
MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks
In preparation for making the clockevents core NTP correction aware, all clockevent device drivers must set ->min_delta_ticks and ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a clockevent device's rate is going to change dynamically and thus, the ratio of ns to ticks ceases to stay invariant. Make the MIPS arch's clockevent drivers initialize these fields properly. This patch alone doesn't introduce any change in functionality as the clockevents core still looks exclusively at the (untouched) ->min_delta_ns and ->max_delta_ns. As soon as this has changed, a followup patch will purge the initialization of ->min_delta_ns and ->max_delta_ns from these drivers. Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Keguang Zhang <keguang.zhang@gmail.com> Cc: John Crispin <john@phrozen.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'arch/mips/ralink')
-rw-r--r--arch/mips/ralink/cevt-rt3352.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/ralink/cevt-rt3352.c b/arch/mips/ralink/cevt-rt3352.c
index f24eee04e16a..b8a1376165b0 100644
--- a/arch/mips/ralink/cevt-rt3352.c
+++ b/arch/mips/ralink/cevt-rt3352.c
@@ -129,7 +129,9 @@ static int __init ralink_systick_init(struct device_node *np)
systick.dev.name = np->name;
clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60);
systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev);
+ systick.dev.max_delta_ticks = 0x7fff;
systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev);
+ systick.dev.min_delta_ticks = 0x3;
systick.dev.irq = irq_of_parse_and_map(np, 0);
if (!systick.dev.irq) {
pr_err("%s: request_irq failed", np->name);