linux-kernel - [PATCH 12/12] spi: s3c64xx: switch exynos850 to new port config data

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Date: Thu,  8 Feb 2024 13:50:45 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: broonie@...nel.org,
	robh@...nel.org,
	andi.shyti@...nel.org,
	semen.protsenko@...aro.org
Cc: krzysztof.kozlowski@...aro.org,
	alim.akhtar@...sung.com,
	linux-spi@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	andre.draszik@...aro.org,
	peter.griffin@...aro.org,
	kernel-team@...roid.com,
	willmcvicker@...gle.com,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	arnd@...db.de,
	Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 12/12] spi: s3c64xx: switch exynos850 to new port config data

Exynos850 has the same version of USI SPI (v2.1) as GS101.
Drop the fifo_lvl_mask and rx_lvl_offset and switch to the new port
config data.

Backward compatibility with DT is not broken because when alises are
set:
- the SPI core will set the bus number according to the alias ID
- the FIFO depth is always the same size for exynos850 (64 bytes) no
  matter the alias ID number.

Advantages of the change:
- drop dependency on the OF alias ID.
- FIFO depth is inferred from the compatible. Exynos850 integrates 3 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.

Just compiled tested.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 drivers/spi/spi-s3c64xx.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 784786407d2e..9fcbe040cb2f 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1576,10 +1576,9 @@ static const struct s3c64xx_spi_port_config exynos5433_spi_port_config = {
 };
 
 static const struct s3c64xx_spi_port_config exynos850_spi_port_config = {
-	/* fifo_lvl_mask is deprecated. Use {rx, tx}_fifomask instead. */
-	.fifo_lvl_mask	= { 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,
-- 
2.43.0.687.g38aa6559b0-goog