Re: [RFT PATCH] regmap-i2c: Only use I2C_FUNC_I2C if val_bits == 8

From: Guenter Roeck
Date: Sat Jun 25 2016 - 11:09:56 EST


On 06/25/2016 04:34 AM, Mark Brown wrote:
On Fri, Jun 24, 2016 at 07:53:53PM -0700, Guenter Roeck wrote:

On chips with a register value size of 16 bits, I2C block reads will
typically not return the expected values. Instead, returned values
are most likely undefined if an operation crosses a register boundary.

No, this just isn't true in general - if a device has trouble with bulk
reads it needs to set use_sigle_rw in the config to disable them.
Device limitations with bulk reads are a per device thing and are
orthogonal to the value size, being more to do with the age and quality
of the register map implementation than anything else.


Ok, thanks for letting me know. I'll try that.

Guenter