Re: [PATCH 0/5] Allwinner SoCs High Speed Timer support

From: Emilio López
Date: Wed Sep 25 2013 - 18:41:31 EST

Hi Maxime,

El 25/09/13 11:03, Maxime Ripard escribió:
Hi everyone,

Here is a few patches adding support for the High Speed Timers running on the
Allwinner SoCs.

These timers are 64 bits timers running at a much higher speed than the timers
used for now on these SoCs, since they are no longer wired to the 24MHz
oscillator, but to the AHB clock.

This HS timers are actually found in all the supported SoCs but the A10.
However, the A20 and A31 come with 4 of these high speed timers, while the A10s
and A13 only have two, hence why we introduce two different compatibles.

The A31 is not using these for now, as its timers are asserted in reset by a
reset controller that first need to gain some support in the kernel first, but
that's for another patchset.


Maxime Ripard (5):
clocksource: sun4i: Select CLKSRC_MMIO
clocksource: Add Allwinner SoCs HS timers driver
ARM: sun5i: a10s: Add support for the High Speed Timers
ARM: sun5i: a13: Add support for the High Speed Timers
ARM: sun7i: a20: Add support for the High Speed Timers

I tested these 5 patches on my Cubieboard2 (A20) and it boots and seems to work fine, so

Tested-by: Emilio López <emilio@xxxxxxxxxxxxx>

# uptime && cat /proc/interrupts
01:45:01 up 1:45, load average: 0.01, 0.03, 0.04
33: 56223 GIC 33 serial
54: 0 GIC 54 sun4i_timer0
87: 522 GIC 87 eth0
113: 66980 GIC 113 sun5i_timer0
IPI0: 0 CPU wakeup interrupts
IPI1: 0 Timer broadcast interrupts
IPI2: 0 Rescheduling interrupts
IPI3: 0 Function call interrupts
IPI4: 0 Single function call interrupts
IPI5: 0 CPU stop interrupts
Err: 0


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