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authorAndreas Larsson <andreas@gaisler.com>2013-02-13 17:20:25 +0400
committerGrant Likely <grant.likely@secretlab.ca>2013-04-07 13:12:20 +0400
commit446411e18b2cb17d153e45f634a3c9a79ada3ac2 (patch)
treed0b227257591b9a010d453bef1bd2645901e3f0d /include/linux/spi/spi.h
parent3d3522604a5557e80fdcab61c54bd04eaf15b525 (diff)
downloadlinux-446411e18b2cb17d153e45f634a3c9a79ada3ac2.tar.xz
spi: Initialize cs_gpio and cs_gpios with -ENOENT
The return value from of_get_named_gpio is -ENOENT when the given index matches a hole in the "cs-gpios" property phandle list. However, the default value of cs_gpio in struct spi_device and entries of cs_gpios in struct spi_master is -EINVAL, which is documented to indicate that a GPIO line should not be used for the given spi_device. This sets the default value of cs_gpio in struct spi_device and entries of cs_gpios in struct spi_master to -ENOENT. Thus, -ENOENT is the only value used to indicate that no GPIO line should be used. Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'include/linux/spi/spi.h')
-rw-r--r--include/linux/spi/spi.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 38c2b925923d..c395f32b53b3 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -57,7 +57,7 @@ extern struct bus_type spi_bus_type;
* @modalias: Name of the driver to use with this device, or an alias
* for that name. This appears in the sysfs "modalias" attribute
* for driver coldplugging, and in uevents used for hotplugging
- * @cs_gpio: gpio number of the chipselect line (optional, -EINVAL when
+ * @cs_gpio: gpio number of the chipselect line (optional, -ENOENT when
* when not using a GPIO line)
*
* A @spi_device is used to interchange data between an SPI slave
@@ -261,7 +261,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
* queue so the subsystem notifies the driver that it may relax the
* hardware by issuing this call
* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
- * number. Any individual value may be -EINVAL for CS lines that
+ * number. Any individual value may be -ENOENT for CS lines that
* are not GPIOs (driven by the SPI controller itself).
*
* Each SPI master controller can communicate with one or more @spi_device