> -----Original Message----- > From: Jean Delvare [mailto:khali@xxxxxxxxxxxx] > Sent: Thursday, November 10, 2011 10:08 AM > To: Linux I2C > Cc: Jeffrey (Sheng-Hui) Chu > Subject: 10-bit address support > > Hi all, > > After Sheng-Hui's fix to i2c-algo-bit, it would seem that we are almost > there with 10-bit slave address support. There's one remaining thing > that worries me though: the 7-bit and 10-bit address spaces overlap. > From Documentation/i2c/ten-bit-addresses: > > "The sets of addresses do not intersect: the 7 bit address 0x10 is not > the same as the 10 bit address 0x10 (though a single device could > respond to both of them)." >From my understanding of the spec, there is no overlap. The 10-bit client at 0x10 will be addressed by the following address sequence: 0Xf0 0X10 <data-out> or 0xf0 0x10 <restart> 0xf1<data-in> The 7-bit client at 0x10 will be addressed by the following address sequence: 0x20 <data-out> or 0x21 <data-in> 0xf0 is equivalent to 7-bit address of 0x78 which is a reserved address in 7-bit space. A compliant 7-bit client should not use or respond to this address. <snip> > -- > Jean Delvare Don't need to do any workaround. IMHO Regards, -Jeffrey -- 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
