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Date: Thu, 14 Oct 2010 10:19:59 -0600
From: Grant Likely <grant.likely@...retlab.ca>
To: spi-devel-general@...ts.sourceforge.net,
richard.rojfors@...ean-labs.com, john.linn@...inx.com,
monstr@...str.eu
Cc: linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/3] 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@...retlab.ca>
---
drivers/spi/xilinx_spi.c | 14 ++++----------
drivers/spi/xilinx_spi.h | 2 +-
drivers/spi/xilinx_spi_of.c | 17 ++++-------------
drivers/spi/xilinx_spi_pltfm.c | 4 +++-
4 files changed, 12 insertions(+), 25 deletions(-)
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 80f2db5..efb28ba 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -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;
diff --git a/drivers/spi/xilinx_spi.h b/drivers/spi/xilinx_spi.h
index d211acc..d710a33 100644
--- a/drivers/spi/xilinx_spi.h
+++ b/drivers/spi/xilinx_spi.h
@@ -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
diff --git a/drivers/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
index b66c2db..c2d8ade 100644
--- a/drivers/spi/xilinx_spi_of.c
+++ b/drivers/spi/xilinx_spi_of.c
@@ -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;
}
diff --git a/drivers/spi/xilinx_spi_pltfm.c b/drivers/spi/xilinx_spi_pltfm.c
index 24debac..a16722a 100644
--- a/drivers/spi/xilinx_spi_pltfm.c
+++ b/drivers/spi/xilinx_spi_pltfm.c
@@ -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;
--
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