spi: s3c64xx: switch gs101 to new port config data

Drop the fifo_lvl_mask and rx_lvl_offset and switch to the new port
config data.

Advantages of the change:
- drop dependency on the OF alias ID.
- FIFO depth is inferred from the compatible. GS101 integrates 16 SPI
  IPs, all with 64 bytes FIFO depths.
- use full mask for SPI_STATUS.{RX, TX}_FIFO_LVL fields. Using partial
  masks is misleading and can hide problems of the driver logic.

S3C64XX_SPI_ST_TX_FIFO_RDY_V2 was defined based on the USI's
SPI_VERSION.USI_IP_VERSION register field, which has value 2 at reset.

MAX_SPI_PORTS is updated to reflect the maximum number of ports for the
rest of the compatibles.

Signed-off-by: Tudor Ambarus <[email protected]>
Link: https://msgid.link/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: ambarus

drivers/spi/spi-s3c64xx.c

@@ -20,7 +20,7 @@
 #include <linux/spi/spi.h>
 #include <linux/types.h>
 
-#define MAX_SPI_PORTS		16
+#define MAX_SPI_PORTS		12
 #define S3C64XX_SPI_QUIRK_CS_AUTO	(1 << 1)
 #define AUTOSUSPEND_TIMEOUT	2000
 
@@ -79,6 +79,8 @@
 #define S3C64XX_SPI_INT_RX_FIFORDY_EN		(1<<1)
 #define S3C64XX_SPI_INT_TX_FIFORDY_EN		(1<<0)
 
+#define S3C64XX_SPI_ST_RX_FIFO_RDY_V2		GENMASK(23, 15)
+#define S3C64XX_SPI_ST_TX_FIFO_RDY_V2		GENMASK(14, 6)
 #define S3C64XX_SPI_ST_TX_FIFO_LVL_SHIFT	6
 #define S3C64XX_SPI_ST_RX_OVERRUN_ERR		(1<<5)
 #define S3C64XX_SPI_ST_RX_UNDERRUN_ERR		(1<<4)
@@ -1615,11 +1617,9 @@ static const struct s3c64xx_spi_port_config fsd_spi_port_config = {
 };
 
 static const struct s3c64xx_spi_port_config gs101_spi_port_config = {
-	/* fifo_lvl_mask is deprecated. Use {rx, tx}_fifomask instead. */
-	.fifo_lvl_mask	= { 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
-			    0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f},
-	/* rx_lvl_offset is deprecated. Use {rx, tx}_fifomask instead. */
-	.rx_lvl_offset	= 15,
+	.fifo_depth	= 64,
+	.rx_fifomask	= S3C64XX_SPI_ST_RX_FIFO_RDY_V2,
+	.tx_fifomask	= S3C64XX_SPI_ST_TX_FIFO_RDY_V2,
 	.tx_st_done	= 25,
 	.clk_div	= 4,
 	.high_speed	= true,