Hello,

[expanded the recipents to include RMK and the clk list]

On Mon, Sep 23, 2019 at 11:04:39AM +0200, Rasmus Villemoes wrote:

On 23/09/2019 10.24, Uwe Kleine-König wrote:

quoted

Also there is a bug already in .config: You are not supposed to call
clk_get_rate if the clk might be off.

Interesting, I didn't know that. So the prepare_enable logic needs to be
moved before we start computing the period/duty cycles. Do you know why
it has apparently worked so far? I would have thought such a rule would
be enforced by the clock framework, or at least produced a warning.

FTR: This is documented in the kerneldoc code comment to clk_get_rate in
include/linux/clk.h.

Assuming this is relevant, it might indeed make sense to add a
WARN_ONCE for this.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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