Hi Heiko, On Fri, May 28, 2021 at 4:26 AM Heiko Schocher <hs@xxxxxxx> wrote: > > The Microchip 48l640 is a 8KByte EERAM connected via SPI. > > Signed-off-by: Heiko Schocher <hs@xxxxxxx> > --- > I tried to use drivers/mtd/devices/mchp23k256.c but this > driver does not use any status register and there seems > slight differences in registers (no write enable register > for example), so I decided to make a new driver. > > This driver sets the continuous mode bit in Status register, > which states you can write continuous ... but after writting > 32 bytes the chip goes into an undefined state, so driver now > writes data in 32 byte chunks. > > I also tried to use regmap, but it leads in a lot of more code, > and as this chip has only spi interface it makes no sense, or? > > Tested this driver on board imx8mp-phyboard-pollux-rdk > board, which is already in mainline. > > Made some tbot tests, which write at random offset random > length bytes with dd and and random content. Reread the data > after a reboot and compare with the written data. Works fine. Works for me too on an imx7d based board, thanks: Tested-by: Fabio Estevam <festevam@xxxxxxx>
