From: jonas@microbit.se (Jonas Andersson)
To: linux-arm-kernel@lists.infradead.org
Subject: at91 clocks
Date: Tue, 24 Mar 2015 15:32:08 +0100 [thread overview]
Message-ID: <55117568.6090202@microbit.se> (raw)
Hi all,
I am working on a system with at91sam9260 soc. Trying to move from
kernel 3.17.4 to 3.19.2. I have problem with pck1 clock.
In my old code i use clk_get() to get pck1 and pllb, set pllb as parent
for pck1, set rate for pck1, enable pck1. Extract from
/sys/kernel/debug/at91_clk:
pllb users= 1 on 96000000 Hz main
pck1 users= 1 on 12000000 Hz pllb
In my new code i have defined the two clocks in DT:
clocks = <&prog1>, <&pllb>;
clock-names = "codec", "parent";
Extract from /sys/kernel/debug/clk/clk_summary:
mainck 2 2
18432000 0 0
prog1 1 1
9216000 0 0
pck1 0 0
9216000 0 0
pllbck 0 0 0 0 0
usbck 0 0 0 0 0
udpck 0 0 0 0 0
uhpck 0 0 0 0 0
I know i probably have to enable pck1 also.
But my main problem is that I got the wrong frequency and parent of prog1.
Why?
Thanks
Jonas
next reply other threads:[~2015-03-24 14:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 14:32 Jonas Andersson [this message]
2015-03-25 0:32 ` at91 clocks Boris Brezillon
2015-03-25 9:06 ` Jonas Andersson
2015-03-25 16:37 ` Boris Brezillon
2015-03-25 18:18 ` Nicolas Ferre
2015-03-27 9:28 ` Jonas Andersson
2015-03-27 9:48 ` Nicolas Ferre
2015-03-26 10:02 ` Jonas Andersson
[not found] ` <5513D701.2080201@microbit.se>
2015-03-26 15:28 ` Boris Brezillon
2015-03-27 10:21 ` Jonas Andersson
2015-03-27 12:20 ` Boris Brezillon
2015-03-27 12:25 ` Boris Brezillon
2015-03-27 12:51 ` Jonas Andersson
2015-03-27 13:54 ` Boris Brezillon
2015-03-27 14:42 ` Jonas Andersson
2015-03-30 11:24 ` Jonas Andersson
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