Messages in this thread | | | Date | Tue, 30 Sep 2014 23:03:58 +0200 | From | Lars-Peter Clausen <> | Subject | Re: [PATCH] regmap: Allow read_reg_mask to be 0 |
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On 09/30/2014 06:07 PM, Dan Murphy wrote: > There may be spi devices that do not require a > register read mask to read the registers. > > Currently the code sets the read mask based on > a non-zero value passed in from the driver or if that > value is 0 sets the read mask to 0x80.
It only sets it to the bus default if both read_flag_mask and write_flag_mask are 0. The assumption is that both of them being zero is a invalid configuration and either of them (or both) have to be non-zero for proper operation, since otherwise the device can't tell the difference between a read and a write.
Do you have a device where both the read and the write mask is 0?
- Lars
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