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Groups > linux.kernel > #1532283
| From | Alexander Kochetkov <al.kochet@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v3 11/13] clocksource/drivers/rockchip_timer: implement reading 64bit value from timer |
| Date | 2016-11-29 14:50 +0100 |
| Message-ID | <sIQXf-F4-7@gated-at.bofh.it> (permalink) |
| References | <sIvg5-3iM-5@gated-at.bofh.it> <sIQXf-F4-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
---
drivers/clocksource/rockchip_timer.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c
index c2b0454..6224aa9 100644
--- a/drivers/clocksource/rockchip_timer.c
+++ b/drivers/clocksource/rockchip_timer.c
@@ -19,6 +19,8 @@
#define TIMER_LOAD_COUNT0 0x00
#define TIMER_LOAD_COUNT1 0x04
+#define TIMER_CURRENT_VALUE0 0x08
+#define TIMER_CURRENT_VALUE1 0x0C
#define TIMER_CONTROL_REG3288 0x10
#define TIMER_CONTROL_REG3399 0x1c
#define TIMER_INT_STATUS 0x18
@@ -72,6 +74,25 @@ static void rk_timer_update_counter(u64 cycles, struct rk_timer *timer)
writel_relaxed(upper, timer->base + TIMER_LOAD_COUNT1);
}
+static u64 rk_timer_counter_read(struct rk_timer *timer)
+{
+ u64 counter;
+ u32 lower;
+ u32 upper, old_upper;
+
+ upper = readl_relaxed(timer->base + TIMER_CURRENT_VALUE1);
+ do {
+ old_upper = upper;
+ lower = readl_relaxed(timer->base + TIMER_CURRENT_VALUE0);
+ upper = readl_relaxed(timer->base + TIMER_CURRENT_VALUE1);
+ } while (upper != old_upper);
+
+ counter = upper;
+ counter <<= 32;
+ counter |= lower;
+ return counter;
+}
+
static void rk_timer_interrupt_clear(struct rk_timer *timer)
{
writel_relaxed(1, timer->base + TIMER_INT_STATUS);
--
1.7.9.5
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[PATCHv2 00/11] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCHv2 11/11] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCHv2 06/11] clocksource/drivers/rockchip_timer: low level routines take rk_timer as parameter Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCHv2 08/11] clocksource/drivers/rockchip_timer: move TIMER_INT_UNMASK out of rk_timer_enable() Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCHv2 01/11] dt-bindings: clarify compatible property for rockchip timers Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCHv2 10/11] clocksource/drivers/rockchip_timer: implement reading 64bit value from timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-28 15:40 +0100
[PATCH v3 00/13] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 10/13] clocksource/drivers/rockchip_timer: implement loading 64bit value into timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 11/13] clocksource/drivers/rockchip_timer: implement reading 64bit value from timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 02/13] ARM: dts: rockchip: update compatible property for rk3228 timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 03/13] ARM: dts: rockchip: update compatible property for rk3229 timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 09/13] clocksource/drivers/rockchip_timer: move TIMER_INT_UNMASK out of rk_timer_enable() Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 04/13] ARM: dts: rockchip: add timer entries to rk3188 dtsi Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 13/13] clocksource/drivers/rockchip_timer: Prevent ftrace recursion Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
Re: [PATCH v3 13/13] clocksource/drivers/rockchip_timer: Prevent ftrace recursion Heiko Stübner <heiko@sntech.de> - 2016-11-29 16:10 +0100
Re: [PATCH v3 13/13] clocksource/drivers/rockchip_timer: Prevent ftrace recursion Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 16:40 +0100
[PATCH v3 05/13] ARM: dts: rockchip: disable arm-global-timer for rk3188 Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 07/13] clocksource/drivers/rockchip_timer: low level routines take rk_timer as parameter Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 12/13] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 01/13] dt-bindings: clarify compatible property for rockchip timers Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 06/13] clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and rk_clock_event_device Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
[PATCH v3 08/13] clocksource/drivers/rockchip_timer: drop unused rk_base() and rk_ctrl() Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 14:50 +0100
Re: [PATCH v3 08/13] clocksource/drivers/rockchip_timer: drop unused rk_base() and rk_ctrl() Heiko Stübner <heiko@sntech.de> - 2016-11-29 16:10 +0100
[PATCH v4 5/9] ARM: dts: rockchip: disable arm-global-timer for rk3188 Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 6/9] clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and rk_clock_event_device Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 3/9] ARM: dts: rockchip: update compatible property for rk3229 timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 9/9] clocksource/drivers/rockchip_timer: implement clocksource timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 2/9] ARM: dts: rockchip: update compatible property for rk3228 timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 7/9] clocksource/drivers/rockchip_timer: low level routines take rk_timer as parameter Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 4/9] ARM: dts: rockchip: add timer entries to rk3188 SoC Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 8/9] clocksource/drivers/rockchip_timer: move TIMER_INT_UNMASK out of rk_timer_enable() Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
[PATCH v4 1/9] dt-bindings: clarify compatible property for rockchip timers Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
Re: [PATCH v4 1/9] dt-bindings: clarify compatible property for rockchip timers Rob Herring <robh@kernel.org> - 2016-12-05 23:30 +0100
[PATCH v4 0/9] Implement clocksource for rockchip SoC using rockchip timer Alexander Kochetkov <al.kochet@gmail.com> - 2016-11-29 17:20 +0100
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