| Message ID | 20240120012948.8836-6-semen.protsenko@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | arm64: exynos: Enable SPI for Exynos850 | expand |
On 1/20/24 01:29, Sam Protsenko wrote: > Add SPI port configuration for Exynos850 SoC. It has 3 USI blocks which > can be configured in SPI mode: > > * spi_0: BLK_PERI_SPI_0 (0x13940000) > * spi_1: BLK_ALIVE_USI_CMGP00 (0x11d00000) > * spi_2: BLK_ALIVE_USI_CMGP01 (0x11d20000) > > SPI FIFO depth is 64 bytes for all those SPI blocks, so the > .fifo_lvl_mask value is set to 0x7f. All blocks have DIV_4 as the > default internal clock divider, and an internal loopback mode to run > a loopback test. > > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> > --- > drivers/spi/spi-s3c64xx.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c > index 0e48ffd499b9..f7d623ad6ac3 100644 > --- a/drivers/spi/spi-s3c64xx.c > +++ b/drivers/spi/spi-s3c64xx.c > @@ -1461,6 +1461,17 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = { > .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, > }; > > +static const struct s3c64xx_spi_port_config exynos850_spi_port_config = { > + .fifo_lvl_mask = { 0x7f, 0x7f, 0x7f }, I'll come with a follow up patch on top of this. Having the dt alias used as an index in the fifo_lvl_mask to determine the FIFO depth is wrong. Not only because of the dependency on the alias, but also because the fifo_lvl_mask value does not reflect the FIFO level reg field. Playing with what we have now is ok by me, I find the patch good. > + .rx_lvl_offset = 15, > + .tx_st_done = 25, > + .clk_div = 4, > + .high_speed = true, > + .clk_from_cmu = true, > + .has_loopback = true, > + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, > +}; > + > static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = { > .fifo_lvl_mask = { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f, > 0x7f, 0x7f, 0x7f, 0x7f}, > @@ -1515,6 +1526,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { > { .compatible = "samsung,exynos5433-spi", > .data = (void *)&exynos5433_spi_port_config, > }, > + { .compatible = "samsung,exynos850-spi", > + .data = (void *)&exynos850_spi_port_config, > + }, > { .compatible = "samsung,exynosautov9-spi", > .data = (void *)&exynosautov9_spi_port_config, > },
On Wed, Jan 24, 2024 at 12:49 AM Tudor Ambarus <tudor.ambarus@linaro.org> wrote: > > > > On 1/20/24 01:29, Sam Protsenko wrote: > > Add SPI port configuration for Exynos850 SoC. It has 3 USI blocks which > > can be configured in SPI mode: > > > > * spi_0: BLK_PERI_SPI_0 (0x13940000) > > * spi_1: BLK_ALIVE_USI_CMGP00 (0x11d00000) > > * spi_2: BLK_ALIVE_USI_CMGP01 (0x11d20000) > > > > SPI FIFO depth is 64 bytes for all those SPI blocks, so the > > .fifo_lvl_mask value is set to 0x7f. All blocks have DIV_4 as the > > default internal clock divider, and an internal loopback mode to run > > a loopback test. > > > > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> > > Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> > > > --- > > drivers/spi/spi-s3c64xx.c | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > > > > diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c > > index 0e48ffd499b9..f7d623ad6ac3 100644 > > --- a/drivers/spi/spi-s3c64xx.c > > +++ b/drivers/spi/spi-s3c64xx.c > > @@ -1461,6 +1461,17 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = { > > .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, > > }; > > > > +static const struct s3c64xx_spi_port_config exynos850_spi_port_config = { > > + .fifo_lvl_mask = { 0x7f, 0x7f, 0x7f }, > > I'll come with a follow up patch on top of this. Having the dt alias > used as an index in the fifo_lvl_mask to determine the FIFO depth is > wrong. Not only because of the dependency on the alias, but also because > the fifo_lvl_mask value does not reflect the FIFO level reg field. > Playing with what we have now is ok by me, I find the patch good. > Yeah, we just have to make sure all our patches are taken in the correct order, to avoid any possible conflicts. > > + .rx_lvl_offset = 15, > > + .tx_st_done = 25, > > + .clk_div = 4, > > + .high_speed = true, > > + .clk_from_cmu = true, > > + .has_loopback = true, > > + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, > > +}; > > + > > static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = { > > .fifo_lvl_mask = { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f, > > 0x7f, 0x7f, 0x7f, 0x7f}, > > @@ -1515,6 +1526,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { > > { .compatible = "samsung,exynos5433-spi", > > .data = (void *)&exynos5433_spi_port_config, > > }, > > + { .compatible = "samsung,exynos850-spi", > > + .data = (void *)&exynos850_spi_port_config, > > + }, > > { .compatible = "samsung,exynosautov9-spi", > > .data = (void *)&exynosautov9_spi_port_config, > > },
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 0e48ffd499b9..f7d623ad6ac3 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -1461,6 +1461,17 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = { .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, }; +static const struct s3c64xx_spi_port_config exynos850_spi_port_config = { + .fifo_lvl_mask = { 0x7f, 0x7f, 0x7f }, + .rx_lvl_offset = 15, + .tx_st_done = 25, + .clk_div = 4, + .high_speed = true, + .clk_from_cmu = true, + .has_loopback = true, + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, +}; + static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = { .fifo_lvl_mask = { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f}, @@ -1515,6 +1526,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { { .compatible = "samsung,exynos5433-spi", .data = (void *)&exynos5433_spi_port_config, }, + { .compatible = "samsung,exynos850-spi", + .data = (void *)&exynos850_spi_port_config, + }, { .compatible = "samsung,exynosautov9-spi", .data = (void *)&exynosautov9_spi_port_config, },
Add SPI port configuration for Exynos850 SoC. It has 3 USI blocks which can be configured in SPI mode: * spi_0: BLK_PERI_SPI_0 (0x13940000) * spi_1: BLK_ALIVE_USI_CMGP00 (0x11d00000) * spi_2: BLK_ALIVE_USI_CMGP01 (0x11d20000) SPI FIFO depth is 64 bytes for all those SPI blocks, so the .fifo_lvl_mask value is set to 0x7f. All blocks have DIV_4 as the default internal clock divider, and an internal loopback mode to run a loopback test. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> --- drivers/spi/spi-s3c64xx.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)