Messages in this thread |  | | | Date | Mon, 14 Dec 2009 11:31:25 +0000 | | From | Mark Brown <> | | Subject | Re: [PATCH 1/1] twl4030-regulator: extend twlreg_info to contain turnon delay and remap |
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On Mon, Dec 14, 2009 at 09:05:17AM +0200, Juha Keski-Saari wrote:
> has been turned on. The DM also quotes a maximum wakeup time for > returning from sleep to full output, but that delay is much shorter. For > some regulators the turnon delay is theoretically long enough for the > reg_enable to return to the driver noticeably earlier than the regulator > output is actually at target level.
OK. This ramp rate thing is a general issue for regulators, especially those that are controlled via GPIOs rather than I2C since for them the control interface takes approximately zero time to respond. Ideally we want to do something slightly more involved than what you've got here since if you're turning on more than one regulator at once it'd be nice to be able to allow all the supplies to ramp in parallel rather than serialising everything.
I've got a patch half done for this which I should try to finish off and post soon but for now this should be OK.
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