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Message-ID: <4D516BBB.5090506@metafoo.de> Date: Tue, 08 Feb 2011 17:13:47 +0100 From: Lars-Peter Clausen <lars@...afoo.de> To: Grazvydas Ignotas <notasas@...il.com> CC: Anton Vorontsov <cbouatmailru@...il.com>, Rodolfo Giometti <giometti@...ux.it>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 00/14] POWER: BQ27x00: New Properties, fixes, bq27000 support On 02/08/2011 12:40 PM, Grazvydas Ignotas wrote: > That works. However I wonder about the delay, I've experimentally > determined that bq27500 refreshes in about a second, so before this > series I could for example run 'watch -n 1 cat current_now' and see > current changes almost in realtime (when toggling backlight, for > example). Maybe we could have different cache timeout for different > chips or have quickly changing properties (like current and voltage) > bypass the cache. Looking at the datasheet confirms that the bq27500 updates the current register every second. The bq27000 updates it only every 5.12 seconds. I think reducing the the cache time for bq27500 to 1 second would render the cache mostly useless, but maybe it makes sense to bypass the cache for voltage and current on the bq27500. - Lars -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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