diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-03-05 12:55:46 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-03-05 14:36:25 +0000 |
| commit | 29d2daf2c33ce9b1038f3fcd55e16a788c00fc86 (patch) | |
| tree | 3385c9dd66e654c96f62c067c2a35133993e5152 | |
| parent | c7a1a20e36faed2a298dd2965ab91c31dfc43f73 (diff) | |
spi: spi-fsl-dspi: Make bus-num property optional
The SPI bus number is completely optional to Linux, so make the
corresponding device tree property optional as well.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20200305115546.31814-1-s.hauer@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt | 2 | ||||
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 8 |
2 files changed, 3 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt index 99b94cfe1623..30a79da9c039 100644 --- a/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt +++ b/Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt @@ -19,11 +19,11 @@ Required properties: - pinctrl-0: pin control group to be used for this controller. - pinctrl-names: must contain a "default" entry. - spi-num-chipselects : the number of the chipselect signals. -- bus-num : the slave chip chipselect signal number. Optional property: - big-endian: If present the dspi device's registers are implemented in big endian mode. +- bus-num : the slave chip chipselect signal number. Optional SPI slave node properties: - fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index c357c3247232..74dc0df518fa 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1108,7 +1108,7 @@ static int dspi_probe(struct platform_device *pdev) const struct regmap_config *regmap_config; struct fsl_dspi_platform_data *pdata; struct spi_controller *ctlr; - int ret, cs_num, bus_num; + int ret, cs_num, bus_num = -1; struct fsl_dspi *dspi; struct resource *res; void __iomem *base; @@ -1145,11 +1145,7 @@ static int dspi_probe(struct platform_device *pdev) } ctlr->num_chipselect = cs_num; - ret = of_property_read_u32(np, "bus-num", &bus_num); - if (ret < 0) { - dev_err(&pdev->dev, "can't get bus-num\n"); - goto out_ctlr_put; - } + of_property_read_u32(np, "bus-num", &bus_num); ctlr->bus_num = bus_num; if (of_property_read_bool(np, "spi-slave")) |