A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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spi: Initialize cs_gpio and cs_gpios with -ENOENT

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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 <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
This commit is contained in:
Andreas Larsson 2013-02-13 14:20:25 +01:00 • committed by Grant Likely
commit 446411e18b
2 changed files with 4 additions and 4 deletions
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4
drivers/spi/spi.c
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@ -334,7 +334,7 @@ struct spi_device *spi_alloc_device(struct spi_master *master)
spi->dev.parent = &master->dev;
spi->dev.bus = &spi_bus_type;
spi->dev.release = spidev_release;
spi->cs_gpio = -EINVAL;
spi->cs_gpio = -ENOENT;
device_initialize(&spi->dev);
return spi;
}
@ -1079,7 +1079,7 @@ static int of_spi_register_master(struct spi_master *master)
return -ENOMEM;
for (i = 0; i < master->num_chipselect; i++)
cs[i] = -EINVAL;
cs[i] = -ENOENT;
for (i = 0; i < nb; i++)
cs[i] = of_get_named_gpio(np, "cs-gpios", i);