Add support for GS101 SPI. GS101 integrates 16 SPI nodes, all with 64
bytes FIFOs. GS101 allows just 32 bit register accesses, otherwise a
Serror Interrupt is raised. Do the write reg accesses in 32 bits.
Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxx>
---
drivers/spi/spi-s3c64xx.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index cb45ad615f3d..9ad0d513fb30 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -19,7 +19,7 @@
#include <linux/spi/spi.h>
#include <linux/types.h>
-#define MAX_SPI_PORTS 12
+#define MAX_SPI_PORTS 16
#define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1)
#define AUTOSUSPEND_TIMEOUT 2000
@@ -1538,6 +1538,19 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
.quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
};
+static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
+ .fifo_lvl_mask = { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
+ 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
+ .rx_lvl_offset = 15,
+ .tx_st_done = 25,
+ .clk_div = 4,
+ .high_speed = true,
+ .clk_from_cmu = true,
+ .has_loopback = true,
+ .use_32bit_io = true,
+ .quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
{
.name = "s3c2443-spi",
@@ -1550,6 +1563,9 @@ static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
};
static const struct of_device_id s3c64xx_spi_dt_match[] = {
+ { .compatible = "google,gs101-spi",
+ .data = &gs101_spi_port_config,
+ },
{ .compatible = "samsung,s3c2443-spi",
.data = &s3c2443_spi_port_config,
},
--
2.43.0.594.gd9cf4e227d-goog
