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Message-Id: <20250509-james-nxp-spi-v1-1-32bfcd2fea11@linaro.org>
Date: Fri, 09 May 2025 12:05:48 +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 01/14] spi: spi-fsl-dspi: Define regmaps per device
Refactor the regmaps so they can be defined per device rather than
programmatically. This will allow us to add two new regmaps for S32G in
a later commit.
No functional changes.
Signed-off-by: James Clark <james.clark@...aro.org>
---
drivers/spi/spi-fsl-dspi.c | 121 ++++++++++++++++++++++++---------------------
1 file changed, 66 insertions(+), 55 deletions(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 067c954cb6ea..31ea8ce81e98 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -121,6 +121,7 @@ struct fsl_dspi_devtype_data {
enum dspi_trans_mode trans_mode;
u8 max_clock_factor;
int fifo_size;
+ const struct regmap_config *regmap;
};
enum {
@@ -136,60 +137,123 @@ enum {
VF610,
};
+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),
+};
+
+static const struct regmap_access_table dspi_volatile_table = {
+ .yes_ranges = dspi_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges),
+};
+
+static const struct regmap_range dspi_xspi_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_SREX, SPI_SREX),
+};
+
+static const struct regmap_access_table dspi_xspi_volatile_table = {
+ .yes_ranges = dspi_xspi_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(dspi_xspi_volatile_ranges),
+};
+
+enum {
+ DSPI_REGMAP,
+ DSPI_XSPI_REGMAP,
+ DSPI_PUSHR
+};
+
+static const struct regmap_config dspi_regmap_config[] = {
+ [DSPI_REGMAP] = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x88,
+ .volatile_table = &dspi_volatile_table
+ },
+ [DSPI_XSPI_REGMAP] = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x13c,
+ .volatile_table = &dspi_xspi_volatile_table
+ },
+ [DSPI_PUSHR] = {
+ .name = "pushr",
+ .reg_bits = 16,
+ .val_bits = 16,
+ .reg_stride = 2,
+ .max_register = 0x2
+ }
+};
+
static const struct fsl_dspi_devtype_data devtype_data[] = {
[VF610] = {
.trans_mode = DSPI_DMA_MODE,
.max_clock_factor = 2,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_REGMAP]
},
[LS1021A] = {
/* Has A-011218 DMA erratum */
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS1012A] = {
/* Has A-011218 DMA erratum */
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 16,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS1028A] = {
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS1043A] = {
/* Has A-011218 DMA erratum */
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 16,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS1046A] = {
/* Has A-011218 DMA erratum */
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 16,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS2080A] = {
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LS2085A] = {
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[LX2160A] = {
.trans_mode = DSPI_XSPI_MODE,
.max_clock_factor = 8,
.fifo_size = 4,
+ .regmap = &dspi_regmap_config[DSPI_XSPI_REGMAP]
},
[MCF5441X] = {
.trans_mode = DSPI_DMA_MODE,
.max_clock_factor = 8,
.fifo_size = 16,
+ .regmap = &dspi_regmap_config[DSPI_REGMAP]
},
};
@@ -1167,54 +1231,6 @@ static int dspi_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);
-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),
-};
-
-static const struct regmap_access_table dspi_volatile_table = {
- .yes_ranges = dspi_volatile_ranges,
- .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges),
-};
-
-static const struct regmap_config dspi_regmap_config = {
- .reg_bits = 32,
- .val_bits = 32,
- .reg_stride = 4,
- .max_register = 0x88,
- .volatile_table = &dspi_volatile_table,
-};
-
-static const struct regmap_range dspi_xspi_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_SREX, SPI_SREX),
-};
-
-static const struct regmap_access_table dspi_xspi_volatile_table = {
- .yes_ranges = dspi_xspi_volatile_ranges,
- .n_yes_ranges = ARRAY_SIZE(dspi_xspi_volatile_ranges),
-};
-
-static const struct regmap_config dspi_xspi_regmap_config[] = {
- {
- .reg_bits = 32,
- .val_bits = 32,
- .reg_stride = 4,
- .max_register = 0x13c,
- .volatile_table = &dspi_xspi_volatile_table,
- },
- {
- .name = "pushr",
- .reg_bits = 16,
- .val_bits = 16,
- .reg_stride = 2,
- .max_register = 0x2,
- },
-};
-
static int dspi_init(struct fsl_dspi *dspi)
{
unsigned int mcr;
@@ -1272,7 +1288,6 @@ static int dspi_target_abort(struct spi_controller *host)
static int dspi_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
- const struct regmap_config *regmap_config;
struct fsl_dspi_platform_data *pdata;
struct spi_controller *ctlr;
int ret, cs_num, bus_num = -1;
@@ -1355,11 +1370,7 @@ static int dspi_probe(struct platform_device *pdev)
goto out_ctlr_put;
}
- if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
- regmap_config = &dspi_xspi_regmap_config[0];
- else
- regmap_config = &dspi_regmap_config;
- dspi->regmap = devm_regmap_init_mmio(&pdev->dev, base, regmap_config);
+ dspi->regmap = devm_regmap_init_mmio(&pdev->dev, base, dspi->devtype_data->regmap);
if (IS_ERR(dspi->regmap)) {
dev_err(&pdev->dev, "failed to init regmap: %ld\n",
PTR_ERR(dspi->regmap));
@@ -1370,7 +1381,7 @@ static int dspi_probe(struct platform_device *pdev)
if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE) {
dspi->regmap_pushr = devm_regmap_init_mmio(
&pdev->dev, base + SPI_PUSHR,
- &dspi_xspi_regmap_config[1]);
+ &dspi_regmap_config[DSPI_PUSHR]);
if (IS_ERR(dspi->regmap_pushr)) {
dev_err(&pdev->dev,
"failed to init pushr regmap: %ld\n",
--
2.34.1
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