| Message ID | 20230119185342.2093323-8-amit.kumar-mahapatra@amd.com |
|---|---|
| State | Superseded |
| 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/platform/x86/serial-multi-instantiate.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c > index 5362f1a7b77c..270a4700d25d 100644 > --- a/drivers/platform/x86/serial-multi-instantiate.c > +++ b/drivers/platform/x86/serial-multi-instantiate.c > @@ -139,7 +139,8 @@ static int smi_spi_probe(struct platform_device *pdev, struct smi *smi, > goto error; > } > > - dev_dbg(dev, "SPI device %s using chip select %u", name, spi_dev->chip_select); > + dev_dbg(dev, "SPI device %s using chip select %u", name, > + spi_get_chipselect(spi_dev, 0)); > > smi->spi_devs[i] = spi_dev; > smi->spi_num++; Reviewed-by: Michal Simek <michal.simek@amd.com> Thanks, Michal
diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c index 5362f1a7b77c..270a4700d25d 100644 --- a/drivers/platform/x86/serial-multi-instantiate.c +++ b/drivers/platform/x86/serial-multi-instantiate.c @@ -139,7 +139,8 @@ static int smi_spi_probe(struct platform_device *pdev, struct smi *smi, goto error; } - dev_dbg(dev, "SPI device %s using chip select %u", name, spi_dev->chip_select); + dev_dbg(dev, "SPI device %s using chip select %u", name, + spi_get_chipselect(spi_dev, 0)); smi->spi_devs[i] = spi_dev; smi->spi_num++;
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/platform/x86/serial-multi-instantiate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)