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spi/xilinx: Eliminate pdata references from common code. 

The current code has the OF binding modifying the platform_data
pointer which it must not do, and the common code doesn't really need
to use a pdata pointer.  This patch eliminates the platform_data
references from the common part of the driver in preparation for
merging the OF and non-OF versions.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Grant Likely 2010-10-14 08:54:55 -06:00
parent f6614b7bb4
commit 91565c4068
4 changed files with 12 additions and 25 deletions
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14
drivers/spi/xilinx_spi.c
View File

@ -351,18 +351,12 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
}
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
u32 irq, s16 bus_num)
u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word)
{
struct spi_master *master;
struct xilinx_spi *xspi;
struct xspi_platform_data *pdata = dev->platform_data;
int ret;
if (!pdata) {
dev_err(dev, "No platform data attached\n");
return NULL;
}
master = spi_alloc_master(dev, sizeof(struct xilinx_spi));
if (!master)
return NULL;
@ -389,21 +383,21 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
}
master->bus_num = bus_num;
master->num_chipselect = pdata->num_chipselect;
master->num_chipselect = num_cs;
#ifdef CONFIG_OF
master->dev.of_node = dev->of_node;
#endif
xspi->mem = *mem;
xspi->irq = irq;
if (pdata->little_endian) {
if (little_endian) {
xspi->read_fn = xspi_read32;
xspi->write_fn = xspi_write32;
} else {
xspi->read_fn = xspi_read32_be;
xspi->write_fn = xspi_write32_be;
}
xspi->bits_per_word = pdata->bits_per_word;
xspi->bits_per_word = bits_per_word;
if (xspi->bits_per_word == 8) {
xspi->tx_fn = xspi_tx8;
xspi->rx_fn = xspi_rx8;

2
drivers/spi/xilinx_spi.h
View File

@ -26,7 +26,7 @@
#define XILINX_SPI_NAME "xilinx_spi"
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
u32 irq, s16 bus_num);
u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word);
void xilinx_spi_deinit(struct spi_master *master);
#endif

17
drivers/spi/xilinx_spi_of.c
View File

@ -42,12 +42,11 @@ static int __devinit xilinx_spi_of_probe(struct platform_device *ofdev,
const struct of_device_id *match)
{
struct spi_master *master;
struct xspi_platform_data *pdata;
struct resource r_mem;
struct resource r_irq;
int rc = 0;
const u32 *prop;
int len;
int len, num_cs;
rc = of_address_to_resource(ofdev->dev.of_node, 0, &r_mem);
if (rc) {
@ -61,21 +60,15 @@ static int __devinit xilinx_spi_of_probe(struct platform_device *ofdev,
return -ENODEV;
}
ofdev->dev.platform_data =
kzalloc(sizeof(struct xspi_platform_data), GFP_KERNEL);
pdata = ofdev->dev.platform_data;
if (!pdata)
return -ENOMEM;
/* number of slave select bits is required */
prop = of_get_property(ofdev->dev.of_node, "xlnx,num-ss-bits", &len);
if (!prop || len < sizeof(*prop)) {
dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
return -EINVAL;
}
pdata->num_chipselect = *prop;
pdata->bits_per_word = 8;
master = xilinx_spi_init(&ofdev->dev, &r_mem, r_irq.start, -1);
num_cs = __be32_to_cpup(prop);
master = xilinx_spi_init(&ofdev->dev, &r_mem, r_irq.start, -1,
num_cs, 0, 8);
if (!master)
return -ENODEV;
@ -88,8 +81,6 @@ static int __devexit xilinx_spi_remove(struct platform_device *ofdev)
{
xilinx_spi_deinit(dev_get_drvdata(&ofdev->dev));
dev_set_drvdata(&ofdev->dev, 0);
kfree(ofdev->dev.platform_data);
ofdev->dev.platform_data = NULL;
return 0;
}

4
drivers/spi/xilinx_spi_pltfm.c
View File

@ -54,7 +54,9 @@ static int __devinit xilinx_spi_probe(struct platform_device *dev)
if (irq < 0)
return -ENXIO;
master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
master = xilinx_spi_init(&dev->dev, r, irq, dev->id,
pdata->num_chipselect, pdata->little_endian,
pdata->bits_per_word);
if (!master)
return -ENODEV;