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spi: By default setup spi_masters with 1 chipselect and dynamics bus number

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Trivial simplification.  Instead of requiring spi master drivers to
always set the bus number (even when a dynamic number is desired),
this patch modifies spi_alloc_master() to initialize num_chipselect to
1 (because there will always be at least one CS) and bus_num to -1 for
dynamic allocation.  This simplifies the code needed to be written for
drivers.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely
2012-05-19 23:42:08 -06:00
parent 71422f9e68
commit 1e8a52e18c
6 changed files with 2 additions and 13 deletions
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3
drivers/spi/spi-mpc52xx.c
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@@ -433,7 +433,6 @@ static int __devinit mpc52xx_spi_probe(struct platform_device *op)
goto err_alloc;
}
master->bus_num = -1;
master->setup = mpc52xx_spi_setup;
master->transfer = mpc52xx_spi_transfer;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
@@ -479,8 +478,6 @@ static int __devinit mpc52xx_spi_probe(struct platform_device *op)
gpio_direction_output(gpio_cs, 1);
ms->gpio_cs[i] = gpio_cs;
}
} else {
master->num_chipselect = 1;
}
spin_lock_init(&ms->lock);