| Message ID | 20230119185342.2093323-6-amit.kumar-mahapatra@amd.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | spi: Add support for stacked/parallel memories | expand |
On 1/19/23 19:53, Amit Kumar Mahapatra wrote: > Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod > members of struct spi_device to be an array. But changing the type of these > members to array would break the spi driver functionality. To make the > transition smoother introduced four new APIs to get/set the > spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and > spi->cs_gpiod references with get or set API calls. > While adding multi-cs support in further patches the chip_select & cs_gpiod > members of the spi_device structure would be converted to arrays & the > "idx" parameter of the APIs would be used as array index i.e., > spi->chip_select[idx] & spi->cs_gpiod[idx] respectively. > > Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com> > --- > drivers/mtd/devices/mtd_dataflash.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c > index 3bbaa590c768..1d3b2a94581f 100644 > --- a/drivers/mtd/devices/mtd_dataflash.c > +++ b/drivers/mtd/devices/mtd_dataflash.c > @@ -639,7 +639,7 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages, > > /* name must be usable with cmdlinepart */ > sprintf(priv->name, "spi%d.%d-%s", > - spi->master->bus_num, spi->chip_select, > + spi->master->bus_num, spi_get_chipselect(spi, 0), > name); > > device = &priv->mtd; Reviewed-by: Michal Simek <michal.simek@amd.com> Thanks, Michal
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c index 3bbaa590c768..1d3b2a94581f 100644 --- a/drivers/mtd/devices/mtd_dataflash.c +++ b/drivers/mtd/devices/mtd_dataflash.c @@ -639,7 +639,7 @@ static int add_dataflash_otp(struct spi_device *spi, char *name, int nr_pages, /* name must be usable with cmdlinepart */ sprintf(priv->name, "spi%d.%d-%s", - spi->master->bus_num, spi->chip_select, + spi->master->bus_num, spi_get_chipselect(spi, 0), name); device = &priv->mtd;
Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod members of struct spi_device to be an array. But changing the type of these members to array would break the spi driver functionality. To make the transition smoother introduced four new APIs to get/set the spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and spi->cs_gpiod references with get or set API calls. While adding multi-cs support in further patches the chip_select & cs_gpiod members of the spi_device structure would be converted to arrays & the "idx" parameter of the APIs would be used as array index i.e., spi->chip_select[idx] & spi->cs_gpiod[idx] respectively. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com> --- drivers/mtd/devices/mtd_dataflash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)