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

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>

diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index acc88b4..249077e 100644 (file)
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -216,9 +216,6 @@ static __devinit int ath79_spi_probe(struct platform_device *pdev)
        if (pdata) {
                master->bus_num = pdata->bus_num;
                master->num_chipselect = pdata->num_chipselect;
-       } else {
-               master->bus_num = -1;
-               master->num_chipselect = 1;
        }
 
        sp->bitbang.master = spi_master_get(master);

diff --git a/drivers/spi/spi-lm70llp.c b/drivers/spi/spi-lm70llp.c
index 933eb9d..0759b5d 100644 (file)
--- a/drivers/spi/spi-lm70llp.c
+++ b/drivers/spi/spi-lm70llp.c
@@ -219,9 +219,6 @@ static void spi_lm70llp_attach(struct parport *p)
        }
        pp = spi_master_get_devdata(master);
 
-       master->bus_num = -1;   /* dynamic alloc of a bus number */
-       master->num_chipselect = 1;
-
        /*
         * SPI and bitbang hookup.
         */

diff --git a/drivers/spi/spi-mpc52xx.c b/drivers/spi/spi-mpc52xx.c
index 57633d9..cb3a383 100644 (file)
--- a/drivers/spi/spi-mpc52xx.c
+++ b/drivers/spi/spi-mpc52xx.c
@@ -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);

diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index d95d307..75ac9d4 100644 (file)
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -466,9 +466,6 @@ static int __init spi_ppc4xx_of_probe(struct platform_device *op)
        bbp->master->setup = spi_ppc4xx_setup;
        bbp->master->cleanup = spi_ppc4xx_cleanup;
 
-       /* Allocate bus num dynamically. */
-       bbp->master->bus_num = -1;
-
        /* the spi->mode bits understood by this driver: */
        bbp->master->mode_bits =
                SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST;

diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 77c4562..cd56dcf 100644 (file)
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1438,7 +1438,6 @@ static int __devinit pch_spi_pd_probe(struct platform_device *plat_dev)
                plat_dev->id, data->io_remap_addr);
 
        /* initialize members of SPI master */
-       master->bus_num = -1;
        master->num_chipselect = PCH_MAX_CS;
        master->setup = pch_spi_setup;
        master->transfer = pch_spi_transfer;

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 2d65b16..1041cb8 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -936,6 +936,8 @@ struct spi_master *spi_alloc_master(struct device *dev, unsigned size)
                return NULL;
 
        device_initialize(&master->dev);
+       master->bus_num = -1;
+       master->num_chipselect = 1;
        master->dev.class = &spi_master_class;
        master->dev.parent = get_device(dev);
        spi_master_set_devdata(master, &master[1]);