Messages in this thread | | | From | Sangbeom Kim <> | Subject | RE: [PATCH 5/5] regulator: Support AP watchdog reset operation for s5m8767a | Date | Mon, 18 Jun 2012 08:56:29 +0900 |
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On Thu, Jun 18, 2012 at 3:53 AM, Mark Brown wrote: > > Solution > > - Basic concept: After ap watchdog reset, GPIO configuration is > > changed by default value > > - S5M8767A has function of voltage control with gpio (8 levels with 3 > > gpios) > > - Set bootable voltage on level 0 -> can work with default gpio > > configuration > > - In the probing, Change voltage control level from level 0 to level 1 > > - Execute normal dvfs operation on level 1 > > - After watchdog reset, ap gpio is set by default value > > - PMIC operation mode is changed by ap reset (level1 -> level0) > > - AP can execute normal boot > > OK, so basically what you're doing is fixing one of the GPIO selected voltage levels so that when > the AP comes out of reset it'll drive the PMIC into a suitable level for it to boot? That makes > sense That's right. The voltage of S5M8767A can be controlled by GPIO. So, I try to check the status of gpio. I will resend above patch with adding detail commit message.
Thanks, Sangbeom.
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