Messages in this thread | | | Subject | mfd regmap irq to handle some cases | From | Ashish Jangam <> | Date | Mon, 23 Jan 2012 14:17:03 +0530 |
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Hi Mark,
DA9052-53 PMIC supports Tick & Periodic Alarm. On expiry of Alarm an event gets generate and data ( about the alram type - Tick or Periodic) also gets lock in a register. This data needs to be read from the register before event is cleared . But since in regmap irq events are cleared first and then left for processing (which is the obvious way to do) but in this approach data gets loss from the DA9052-53 register and alarm type cannot be determined.
For a quick fix in regmap irq we may tempt to defer event clarification after processing of event but there is a problem in this approach for some variants of DA9052 and DA9053 when event is cleared a spurious interrupt gets generated therefore in earlier release of DA9052/53 MFD module a delay was added. Therefore we need to think on how to handle such cases in regmap irq.
Regards, Ashish
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