spi: s3c64xx: Add Exynos850 support

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>
Link: https://msgid.link/r/20240120012948.8836-6-semen.protsenko@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 432ec60d35684127e53936e8470b23ec09337833..7f7eb8f742e47b984d9641dd280cf15edbed609e 100644 (file)
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1460,6 +1460,17 @@ 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},
@@ -1514,6 +1525,9 @@ 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,
        },