linux-kernel - [PATCH 04/14] spi: spi-fsl-dspi: Add config and regmaps for S32G platforms

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Message-Id: <20250509-james-nxp-spi-v1-4-32bfcd2fea11@linaro.org>
Date: Fri, 09 May 2025 12:05:51 +0100
From: James Clark <james.clark@...aro.org>
To: Vladimir Oltean <olteanv@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Frank Li <Frank.Li@....com>, 
 Chester Lin <chester62515@...il.com>, Matthias Brugger <mbrugger@...e.com>, 
 Ghennadi Procopciuc <ghennadi.procopciuc@....nxp.com>, 
 NXP S32 Linux Team <s32@....com>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, larisa.grigore@....com, arnd@...aro.org, 
 andrei.stefanescu@....com, dan.carpenter@...aro.org
Cc: linux-spi@...r.kernel.org, imx@...ts.linux.dev, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, James Clark <james.clark@...aro.org>
Subject: [PATCH 04/14] spi: spi-fsl-dspi: Add config and regmaps for S32G
 platforms

From: Larisa Grigore <larisa.grigore@....com>

S32G adds SPI_{T,R}XFR4 and extends SPI_CTAR registers to 5. Add the
new regmaps, configs and bits.

dspi_volatile_ranges gets SPI_{T,R}XFR4 added which affects all
platforms, however they are further limited by dspi_yes_ranges.

Signed-off-by: Larisa Grigore <larisa.grigore@....com>
Signed-off-by: James Clark <james.clark@...aro.org>
---
 drivers/spi/spi-fsl-dspi.c | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 701cf56d28e7..df6f85122bfe 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -35,7 +35,7 @@
 #define SPI_TCR				0x08
 #define SPI_TCR_GET_TCNT(x)		(((x) & GENMASK(31, 16)) >> 16)
 
-#define SPI_CTAR(x)			(0x0c + (((x) & GENMASK(1, 0)) * 4))
+#define SPI_CTAR(x)			(0x0c + (((x) & GENMASK(2, 0)) * 4))
 #define SPI_CTAR_FMSZ(x)		(((x) << 27) & GENMASK(30, 27))
 #define SPI_CTAR_CPOL			BIT(26)
 #define SPI_CTAR_CPHA			BIT(25)
@@ -92,12 +92,14 @@
 #define SPI_TXFR1			0x40
 #define SPI_TXFR2			0x44
 #define SPI_TXFR3			0x48
+#define SPI_TXFR4			0x4C
 #define SPI_RXFR0			0x7c
 #define SPI_RXFR1			0x80
 #define SPI_RXFR2			0x84
 #define SPI_RXFR3			0x88
+#define SPI_RXFR4			0x8C
 
-#define SPI_CTARE(x)			(0x11c + (((x) & GENMASK(1, 0)) * 4))
+#define SPI_CTARE(x)			(0x11c + (((x) & GENMASK(2, 0)) * 4))
 #define SPI_CTARE_FMSZE(x)		(((x) & 0x1) << 16)
 #define SPI_CTARE_DTCP(x)		((x) & 0x7ff)
 
@@ -135,6 +137,7 @@ enum {
 	LX2160A,
 	MCF5441X,
 	VF610,
+	S32G
 };
 
 static const struct regmap_range dspi_yes_ranges[] = {
@@ -146,15 +149,29 @@ static const struct regmap_range dspi_yes_ranges[] = {
 	regmap_reg_range(SPI_SREX, SPI_SREX),
 };
 
+static const struct regmap_range s32g_dspi_yes_ranges[] = {
+	regmap_reg_range(SPI_MCR, SPI_MCR),
+	regmap_reg_range(SPI_TCR, SPI_CTAR(5)),
+	regmap_reg_range(SPI_SR, SPI_TXFR4),
+	regmap_reg_range(SPI_RXFR0, SPI_RXFR4),
+	regmap_reg_range(SPI_CTARE(0), SPI_CTARE(5)),
+	regmap_reg_range(SPI_SREX, SPI_SREX),
+};
+
 static const struct regmap_access_table dspi_access_table = {
 	.yes_ranges	= dspi_yes_ranges,
 	.n_yes_ranges	= ARRAY_SIZE(dspi_yes_ranges),
 };
 
+static const struct regmap_access_table s32g_dspi_access_table = {
+	.yes_ranges	= s32g_dspi_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(s32g_dspi_yes_ranges),
+};
+
 static const struct regmap_range dspi_volatile_ranges[] = {
 	regmap_reg_range(SPI_MCR, SPI_TCR),
 	regmap_reg_range(SPI_SR, SPI_SR),
-	regmap_reg_range(SPI_PUSHR, SPI_RXFR3),
+	regmap_reg_range(SPI_PUSHR, SPI_RXFR4),
 	regmap_reg_range(SPI_SREX, SPI_SREX)
 };
 
@@ -166,6 +183,7 @@ static const struct regmap_access_table dspi_volatile_table = {
 enum {
 	DSPI_REGMAP,
 	DSPI_XSPI_REGMAP,
+	S32G_DSPI_XSPI_REGMAP,
 	DSPI_PUSHR
 };
 
@@ -188,6 +206,15 @@ static const struct regmap_config dspi_regmap_config[] = {
 		.wr_table	= &dspi_access_table,
 		.rd_table	= &dspi_access_table
 	},
+	[S32G_DSPI_XSPI_REGMAP] = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+		.max_register	= 0x13c,
+		.volatile_table	= &dspi_volatile_table,
+		.wr_table	= &s32g_dspi_access_table,
+		.rd_table	= &s32g_dspi_access_table,
+	},
 	[DSPI_PUSHR] = {
 		.name		= "pushr",
 		.reg_bits	= 16,
@@ -262,6 +289,12 @@ static const struct fsl_dspi_devtype_data devtype_data[] = {
 		.fifo_size		= 16,
 		.regmap			= &dspi_regmap_config[DSPI_REGMAP]
 	},
+	[S32G] = {
+		.trans_mode		= DSPI_XSPI_MODE,
+		.max_clock_factor	= 1,
+		.fifo_size		= 5,
+		.regmap			= &dspi_regmap_config[S32G_DSPI_XSPI_REGMAP]
+	}
 };
 
 struct fsl_dspi_dma {

-- 
2.34.1