Le 06/12/2017 à 03:53, Zhiqiang Hou a écrit : > From: Hou Zhiqiang <[email protected]> > > Restore the status to be compatible with legacy devices. > Take Freescale eSPI boot for example, it copies (in 3 Byte > addressing mode) the RCW and bootloader images from SPI flash > without firing a reset signal previously, so the reboot command > will fail without reseting the addressing mode of SPI flash. resetting
> This patch implement .shutdown function to restore the status implements > in reboot process, and add the same operation to the .remove > function. > > Signed-off-by: Hou Zhiqiang <[email protected]> Applied to the spi-nor/next branch of l2-mtd Thanks! (corrected few mistakes in the commit message) > --- > V3: > - Modified the commit to make this patch specific. > > drivers/mtd/devices/m25p80.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c > index dbe6a1de2bb8..a4e18f6aaa33 100644 > --- a/drivers/mtd/devices/m25p80.c > +++ b/drivers/mtd/devices/m25p80.c > @@ -307,10 +307,18 @@ static int m25p_remove(struct spi_device *spi) > { > struct m25p *flash = spi_get_drvdata(spi); > > + spi_nor_restore(&flash->spi_nor); > + > /* Clean up MTD stuff. */ > return mtd_device_unregister(&flash->spi_nor.mtd); > } > > +static void m25p_shutdown(struct spi_device *spi) > +{ > + struct m25p *flash = spi_get_drvdata(spi); > + > + spi_nor_restore(&flash->spi_nor); > +} > /* > * Do NOT add to this array without reading the following: > * > @@ -386,6 +394,7 @@ static struct spi_driver m25p80_driver = { > .id_table = m25p_ids, > .probe = m25p_probe, > .remove = m25p_remove, > + .shutdown = m25p_shutdown, > > /* REVISIT: many of these chips have deep power-down modes, which > * should clearly be entered on suspend() to minimize power use. >
