linux-kernel - [PATCH v1 8/9] spi: s3c64xx: add support exynos990-spi to new port config data

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Message-Id: <20250205222223.613-9-wachiturroxd150@gmail.com>
Date: Wed,  5 Feb 2025 22:22:22 +0000
From: Denzeel Oliva <wachiturroxd150@...il.com>
To: krzk@...nel.org,
	alim.akhtar@...sung.com
Cc: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	Denzeel Oliva <wachiturroxd150@...il.com>
Subject: [PATCH v1 8/9] spi: s3c64xx: add support exynos990-spi to new port config data

Exynos990 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.

Exynoos990 data for SPI:
- the FIFO depth is always the same size for exynos990
  (64 bytes and 256 bytes), sizes of 256 bytes will be put in DT.
- Exynos990 allows only accesses to 32-bit registers; otherwise, An
  error interrupt is generated. Perform write register accesses in
  32 bits.

Signed-off-by: Denzeel Oliva <wachiturroxd150@...il.com>
---
 drivers/spi/spi-s3c64xx.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 389275dbc..d4cbbaa9a 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1586,6 +1586,19 @@ static const struct s3c64xx_spi_port_config exynos850_spi_port_config = {
 	.quirks		= S3C64XX_SPI_QUIRK_CS_AUTO,
 };
 
+static const struct s3c64xx_spi_port_config exynos990_spi_port_config = {
+	.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,
+	.clk_from_cmu   = true,
+	.has_loopback   = true,
+	.use_32bit_io   = true,
+	.quirks         = S3C64XX_SPI_QUIRK_CS_AUTO,
+};
+
 static const struct s3c64xx_spi_port_config exynosautov9_spi_port_config = {
 	/* fifo_lvl_mask is deprecated. Use {rx, tx}_fifomask instead. */
 	.fifo_lvl_mask	= { 0x1ff, 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff, 0x7f,
@@ -1664,6 +1677,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = {
 	{ .compatible = "samsung,exynos850-spi",
 			.data = &exynos850_spi_port_config,
 	},
+	{ .compatible = "samsung,exynos990-spi",
+			.data = &exynos990_spi_port_config,
+	},
 	{ .compatible = "samsung,exynosautov9-spi",
 			.data = &exynosautov9_spi_port_config,
 	},
-- 
2.47.1