Commit 29d2daf2 authored by Sascha Hauer's avatar Sascha Hauer Committed by Mark Brown

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: default avatarSascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20200305115546.31814-1-s.hauer@pengutronix.deSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent c7a1a20e
......@@ -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
......
......@@ -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"))
......
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