Hi David, On Oct 30, 2012, at 8:46 PM, David Daney wrote: > On 10/31/2012 08:56 AM, Pantelis Antoniou wrote: >> Various platforms need access to the EEPROM in other >> places besides their platform registration callbacks. >> Export the memory accessor to the i2c_client > > i2c_clients are *not* intrinsically memory, so adding this to the generic i2c_client structure doesn't really make sense. What would the semantics of this interface be with respect to temperature sensors and GPIO expanders? > > NACK. > It's only filled in for EEPROM devices. There's no other I2C memory read interface for kernel clients. > >> and implement >> it for the at24 driver. >> >> And before you ask, no, the platform callback can't be used >> for anything that depends on DT. > > Why can't you just allocate (and populate) a struct at24_platform_data for the device if it isn't supplied by whatever created the device? > > > There are no platform_data in the case of device tree only generic-boards. Everything is configured via the DT and there are no callbacks. DT is a purely data driver concept. I'm open to suggestions on how to read an EEPROM from another kernel client, when there's no such thing as platform_data anymore. Regards -- Pantelis -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
