2017-12-12 21:54 GMT+01:00 Rob Herring <robh@xxxxxxxxxx>: > On Fri, Dec 08, 2017 at 02:46:41PM +0100, Geert Uytterhoeven wrote: >> Certain EEPROMS have a size that is larger than the number of address >> bytes would allow, and store the MSB of the address in bit 3 of the >> instruction byte. >> >> This can be described in platform data using EE_INSTR_BIT3_IS_ADDR, or >> in DT using the obsolete legacy "at25,addr-mode" property. >> But currently there exists no non-deprecated way to describe this in DT. >> >> Hence extend the existing "address-width" DT property to allow >> specifying 9 address bits, and enable support for that in the driver. >> >> This has been tested with a Microchip 25LC040A. >> >> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> >> --- >> v2: >> - Do not consider odd address widths of 17 or 25 bits, >> - Move handling inside the switch() statement. >> --- >> Documentation/devicetree/bindings/eeprom/at25.txt | 4 +++- >> drivers/misc/eeprom/at25.c | 3 +++ >> 2 files changed, 6 insertions(+), 1 deletion(-) > > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> Reviewed-by: Ivo Sieben <meltedpianoman@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
