Hi Lothar, > -----Original Message----- > From: Lothar Waßmann [mailto:l...@karo-electronics.de] > Sent: Friday, August 31, 2018 5:28 PM > To: Yogesh Narayan Gaur <yogeshnarayan.g...@nxp.com> > Cc: linux-...@lists.infradead.org; boris.brezil...@bootlin.com; > marek.va...@gmail.com; linux-...@vger.kernel.org; > devicet...@vger.kernel.org; mark.rutl...@arm.com; r...@kernel.org; linux- > ker...@vger.kernel.org; frieder.schre...@exceet.de; > computersforpe...@gmail.com; shawn...@kernel.org; linux-arm- > ker...@lists.infradead.org > Subject: Re: [PATCH 1/7] spi: add slave device size in spi_device struct > > Hi, > > On Fri, 31 Aug 2018 15:59:58 +0530 Yogesh Gaur wrote: > > Add 'size' data variable in spi_device struct. > > This is to save the size of the connected slave device. > > > > After slave device scan, spi_nor_scan, size being assigned to this > > from MTD layer. > > > > SFDP read is being requested before completion of spi_nor_scan() > > routine, thus populate device size before making read request to the > > SPI controller. > > > > Signed-off-by: Yogesh Gaur <yogeshnarayan.g...@nxp.com> > > --- > > drivers/mtd/devices/m25p80.c | 6 ++++++ > > drivers/mtd/spi-nor/spi-nor.c | 2 ++ > > include/linux/spi/spi.h | 2 ++ > > 3 files changed, 10 insertions(+) > > > > diff --git a/drivers/mtd/devices/m25p80.c > > b/drivers/mtd/devices/m25p80.c index fe260cc..6c7ad86 100644 > > --- a/drivers/mtd/devices/m25p80.c > > +++ b/drivers/mtd/devices/m25p80.c > > @@ -124,6 +124,10 @@ static ssize_t m25p80_read(struct spi_nor *nor, > loff_t from, size_t len, > > /* convert the dummy cycles to the number of bytes */ > > op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8; > > > > + /* for case of SFDP header read commands, populate spi device size */ > > + if (flash->spimem->spi->size == 0) > > + flash->spimem->spi->size = nor->mtd.size; > > + > If the 'size' is an spimem specific variable it should be added to the spi_mem > struct rather than the spi_device struct.
Sure, would move 'size' from struct spi_device to the struct spi_mem. -- Regards Yogesh Gaur. > > Lothar Waßmann
