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Message-ID: <20101014162009.18966.42392.stgit@localhost6.localdomain6>
Date: Thu, 14 Oct 2010 10:20:10 -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 3/3] 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@...retlab.ca>
---
drivers/spi/Kconfig | 7 --
drivers/spi/Makefile | 1
drivers/spi/xilinx_spi.c | 56 ++++++++++++++++---
drivers/spi/xilinx_spi.h | 32 -----------
drivers/spi/xilinx_spi_of.c | 124 -------------------------------------------
5 files changed, 45 insertions(+), 175 deletions(-)
delete mode 100644 drivers/spi/xilinx_spi.h
delete mode 100644 drivers/spi/xilinx_spi_of.c
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index cebe425..6660deb 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -330,7 +330,6 @@ 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.
@@ -339,12 +338,6 @@ 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
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 90e0e6a..dadb6b5 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -42,7 +42,6 @@ obj-$(CONFIG_SPI_S3C64XX) += spi_s3c64xx.o
obj-$(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
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index bb3b520..7adaef6 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -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
},
};
diff --git a/drivers/spi/xilinx_spi.h b/drivers/spi/xilinx_spi.h
deleted file mode 100644
index d710a33..0000000
--- a/drivers/spi/xilinx_spi.h
+++ /dev/null
@@ -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
diff --git a/drivers/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
deleted file mode 100644
index c2d8ade..0000000
--- a/drivers/spi/xilinx_spi_of.c
+++ /dev/null
@@ -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@...ean-labs.com>");
-MODULE_DESCRIPTION("Xilinx SPI platform driver");
-MODULE_LICENSE("GPL v2");
--
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