Re: [PATCH v2 5/5] clocksource: sun5i: Add clock notifiers

From: Daniel Lezcano
Date: Tue Mar 03 2015 - 06:17:06 EST


On 03/03/2015 09:52 AM, Maxime Ripard wrote:
On Mon, Jan 26, 2015 at 03:35:41PM +0100, Maxime Ripard wrote:
+static int sun5i_rate_cb_clksrc(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct clk_notifier_data *ndata = data;
+ struct sun5i_timer *timer = to_sun5i_timer(nb);
+ struct sun5i_timer_clksrc *cs = container_of(timer,
+ struct sun5i_timer_clksrc, timer);
+
+ switch (event) {
+ case PRE_RATE_CHANGE:
+ clocksource_unregister(&cs->clksrc);
+ break;
+
+ case POST_RATE_CHANGE:
+ clocksource_register_hz(&cs->clksrc, ndata->new_rate);
+ break;

Why clocksource_unregister couldn't be in the POST_RATE_CHANGE ?

Wouldn't that leave a (small, I agree) window where the timer would
run at a rate different to the one it has been registered with?

Ping?

Hi Maxime,

except I missed something, there were a couple of comments and I was waiting a V3.

-- Daniel


--
<http://www.linaro.org/> Linaro.org â Open source software for ARM SoCs

Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/