Thread (38 messages) 38 messages, 5 authors, 2017-10-12
STALE3193d

[PATCH 11/11] ARM: dts: Add PCLK to the Aspeed watchdogs

From: Andrew Jeffery <hidden>
Date: 2017-10-11 07:14:54
Also in: linux-watchdog

On Wed, 2017-10-11 at 08:32 +0200, Linus Walleij wrote:
quoted
On Wed, Oct 11, 2017 at 5:48 AM, Andrew Jeffery [off-list ref] wrote:
On Sat, 2017-08-12 at 20:43 +0200, Linus Walleij wrote:
quoted
This adds the PCLK clock to the Aspeed watchdog blocks.
I am not directly familiar with the Aspeed clocking, but
since the IP is derived from Faraday FTWDT010 it probably
has the ability to run the watchdog on the PCLK if
desired
This is true for the AST2400, but not the AST2500 where the only option
is EXTCLK (1MHz).
The IP block/cell certainly has a PCLK even if it cannot be used
to drive the watchdog timer. It is necessary to interface the
SoC interconnect.
Hah, yep, brain-fade.

Cheers,

Andrew
quoted
quoted
quoted
+???????????????????????????clocks = <&clk_apb>;
+?????????????????????????????clock-names = "PCLK";
Given the comment above, shouldn't we be doing something like the
following instead for each of the watchdogs?

+???????????????????????????????faraday,use-extclk;
+???????????????????????????????clock-names = "EXTCLK";
So that will be added too, later, when there is a 1MHz clock
to reference in the device tree. I guess after Joel's patches.

Yours,
Linus Walleij
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