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spi/xilinx: merge OF support code into main driver 

Now that the of_platform_bus_type has been merged with the platform
bus type, a single platform driver can handle both OF and non-OF use
cases.  This patch merges the OF support into the platform driver.

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 09:32:53 -06:00
parent 8fd8821b62
commit eae6cb31d8
5 changed files with 45 additions and 175 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/spi/Kconfig
View File

@ -353,7 +353,6 @@ config SPI_XILINX
tristate "Xilinx SPI controller common module"
depends on HAS_IOMEM && EXPERIMENTAL
select SPI_BITBANG
select SPI_XILINX_OF if (XILINX_VIRTEX || MICROBLAZE)
help
This exposes the SPI controller IP from the Xilinx EDK.
@ -362,12 +361,6 @@ config SPI_XILINX
Or for the DS570, see "XPS Serial Peripheral Interface (SPI) (v2.00b)"
config SPI_XILINX_OF
tristate "Xilinx SPI controller OF device"
depends on SPI_XILINX && (XILINX_VIRTEX || MICROBLAZE)
help
This is the OF driver for the SPI controller IP from the Xilinx EDK.
config SPI_NUC900
tristate "Nuvoton NUC900 series SPI"
depends on ARCH_W90X900 && EXPERIMENTAL

1
drivers/spi/Makefile
View File

@ -43,7 +43,6 @@ obj-$(CONFIG_SPI_TEGRA) += spi_tegra.o
obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi_topcliff_pch.o
obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o
obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o

56
drivers/spi/xilinx_spi.c
View File

@ -16,13 +16,12 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#include <linux/io.h>
#include "xilinx_spi.h"
#include <linux/spi/xilinx_spi.h>
#include <linux/io.h>
#define XILINX_SPI_NAME "xilinx_spi"
@ -352,6 +351,15 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
#ifdef CONFIG_OF
static const struct of_device_id xilinx_spi_of_match[] = {
{ .compatible = "xlnx,xps-spi-2.00.a", },
{ .compatible = "xlnx,xps-spi-2.00.b", },
{}
};
MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
#endif
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word)
{
@ -462,13 +470,35 @@ static int __devinit xilinx_spi_probe(struct platform_device *dev)
{
struct xspi_platform_data *pdata;
struct resource *r;
int irq;
int irq, num_cs = 0, little_endian = 0, bits_per_word = 8;
struct spi_master *master;
u8 i;
pdata = dev->dev.platform_data;
if (!pdata)
return -ENODEV;
if (pdata) {
num_cs = pdata->num_chipselect;
little_endian = pdata->little_endian;
bits_per_word = pdata->bits_per_word;
}
#ifdef CONFIG_OF
if (dev->dev.of_node) {
const __be32 *prop;
int len;
/* number of slave select bits is required */
prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits",
&len);
if (prop && len >= sizeof(*prop))
num_cs = __be32_to_cpup(prop);
}
#endif
if (!num_cs) {
dev_err(&dev->dev, "Missing slave select configuration data\n");
return -EINVAL;
}
r = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!r)
@ -478,14 +508,15 @@ 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,
pdata->num_chipselect, pdata->little_endian,
pdata->bits_per_word);
master = xilinx_spi_init(&dev->dev, r, irq, dev->id, num_cs,
little_endian, bits_per_word);
if (!master)
return -ENODEV;
for (i = 0; i < pdata->num_devices; i++)
spi_new_device(master, pdata->devices + i);
if (pdata) {
for (i = 0; i < pdata->num_devices; i++)
spi_new_device(master, pdata->devices + i);
}
platform_set_drvdata(dev, master);
return 0;
@ -508,6 +539,9 @@ static struct platform_driver xilinx_spi_driver = {
.driver = {
.name = XILINX_SPI_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = xilinx_spi_of_match,
#endif
},
};

32
drivers/spi/xilinx_spi.h
View File

@ -1,32 +0,0 @@
/*
* Xilinx SPI device driver API and platform data header file
*
* Copyright (c) 2009 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _XILINX_SPI_H_
#define _XILINX_SPI_H_
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#define XILINX_SPI_NAME "xilinx_spi"
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
u32 irq, s16 bus_num, int num_cs, int little_endian, int bits_per_word);
void xilinx_spi_deinit(struct spi_master *master);
#endif

124
drivers/spi/xilinx_spi_of.c
View File

@ -1,124 +0,0 @@
/*
* Xilinx SPI OF device driver
*
* Copyright (c) 2009 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Supports:
* Xilinx SPI devices as OF devices
*
* Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/of_spi.h>
#include <linux/spi/xilinx_spi.h>
#include "xilinx_spi.h"
static int __devinit xilinx_spi_of_probe(struct platform_device *ofdev,
const struct of_device_id *match)
{
struct spi_master *master;
struct resource r_mem;
struct resource r_irq;
int rc = 0;
const u32 *prop;
int len, num_cs;
rc = of_address_to_resource(ofdev->dev.of_node, 0, &r_mem);
if (rc) {
dev_warn(&ofdev->dev, "invalid address\n");
return rc;
}
rc = of_irq_to_resource(ofdev->dev.of_node, 0, &r_irq);
if (rc == NO_IRQ) {
dev_warn(&ofdev->dev, "no IRQ found\n");
return -ENODEV;
}
/* 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;
}
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;
dev_set_drvdata(&ofdev->dev, master);
return 0;
}
static int __devexit xilinx_spi_remove(struct platform_device *ofdev)
{
xilinx_spi_deinit(dev_get_drvdata(&ofdev->dev));
dev_set_drvdata(&ofdev->dev, 0);
return 0;
}
static int __exit xilinx_spi_of_remove(struct platform_device *op)
{
return xilinx_spi_remove(op);
}
static const struct of_device_id xilinx_spi_of_match[] = {
{ .compatible = "xlnx,xps-spi-2.00.a", },
{ .compatible = "xlnx,xps-spi-2.00.b", },
{}
};
MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
static struct of_platform_driver xilinx_spi_of_driver = {
.probe = xilinx_spi_of_probe,
.remove = __exit_p(xilinx_spi_of_remove),
.driver = {
.name = "xilinx-xps-spi",
.owner = THIS_MODULE,
.of_match_table = xilinx_spi_of_match,
},
};
static int __init xilinx_spi_of_init(void)
{
return of_register_platform_driver(&xilinx_spi_of_driver);
}
module_init(xilinx_spi_of_init);
static void __exit xilinx_spi_of_exit(void)
{
of_unregister_platform_driver(&xilinx_spi_of_driver);
}
module_exit(xilinx_spi_of_exit);
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_DESCRIPTION("Xilinx SPI platform driver");
MODULE_LICENSE("GPL v2");