xilinx_spi: add a platform driver using the xilinx_spi common module.

This patch adds in a platform device driver using the xilinx_spi common module. Tested-by: John Linn <John.Linn@xilinx.com> Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

xilinx_spi: add a platform driver using the xilinx_spi common module.
This patch adds in a platform device driver using the xilinx_spi common module. Tested-by: John Linn <John.Linn@xilinx.com> Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Richard Röjfors · Grant Likely
1 parent c9da2e1255
Showing 3 changed files with 110 additions and 0 deletions Side-by-side Diff
drivers/spi/Kconfig
drivers/spi/Makefile
drivers/spi/xilinx_spi_pltfm.c
@@ -261,6 +261,13 @@
 	help
 	  This is the OF driver for the SPI controller IP from the Xilinx EDK.
  
+config SPI_XILINX_PLTFM
+	tristate "Xilinx SPI controller platform device"
+	depends on SPI_XILINX
+	help
+	  This is the platform driver for the SPI controller IP
+	  from the Xilinx EDK.
+
 #
 # Add new SPI master controllers in alphabetical order above this line
 #
@@ -33,6 +33,7 @@
 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_XILINX_PLTFM)		+= xilinx_spi_pltfm.o
 obj-$(CONFIG_SPI_SH_SCI)		+= spi_sh_sci.o
 obj-$(CONFIG_SPI_STMP3XXX)		+= spi_stmp.o
 # 	... add above this line ...
+/*
+ * Support for Xilinx SPI platform devices
+ * 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 platform 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/platform_device.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+#include <linux/spi/xilinx_spi.h>
+
+#include "xilinx_spi.h"
+
+static int __devinit xilinx_spi_probe(struct platform_device *dev)
+{
+	struct xspi_platform_data *pdata;
+	struct resource *r;
+	int irq;
+	struct spi_master *master;
+	u8 i;
+
+	pdata = dev->dev.platform_data;
+	if (!pdata)
+		return -ENODEV;
+
+	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -ENODEV;
+
+	irq = platform_get_irq(dev, 0);
+	if (irq < 0)
+		return -ENXIO;
+
+	master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
+	if (!master)
+		return -ENODEV;
+
+	for (i = 0; i < pdata->num_devices; i++)
+		spi_new_device(master, pdata->devices + i);
+
+	platform_set_drvdata(dev, master);
+	return 0;
+}
+
+static int __devexit xilinx_spi_remove(struct platform_device *dev)
+{
+	xilinx_spi_deinit(platform_get_drvdata(dev));
+	platform_set_drvdata(dev, 0);
+
+	return 0;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:" XILINX_SPI_NAME);
+
+static struct platform_driver xilinx_spi_driver = {
+	.probe	= xilinx_spi_probe,
+	.remove	= __devexit_p(xilinx_spi_remove),
+	.driver = {
+		.name = XILINX_SPI_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init xilinx_spi_pltfm_init(void)
+{
+	return platform_driver_register(&xilinx_spi_driver);
+}
+module_init(xilinx_spi_pltfm_init);
+
+static void __exit xilinx_spi_pltfm_exit(void)
+{
+	platform_driver_unregister(&xilinx_spi_driver);
+}
+module_exit(xilinx_spi_pltfm_exit);
+
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_DESCRIPTION("Xilinx SPI platform driver");
+MODULE_LICENSE("GPL v2");
...	...	@@ -261,6 +261,13 @@
261	261	help
262	262	This is the OF driver for the SPI controller IP from the Xilinx EDK.
263	263
	264	+config SPI_XILINX_PLTFM
	265	+ tristate "Xilinx SPI controller platform device"
	266	+ depends on SPI_XILINX
	267	+ help
	268	+ This is the platform driver for the SPI controller IP
	269	+ from the Xilinx EDK.
	270	+
264	271	#
265	272	# Add new SPI master controllers in alphabetical order above this line
266	273	#
...	...	@@ -33,6 +33,7 @@
33	33	obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
34	34	obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
35	35	obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o
	36	+obj-$(CONFIG_SPI_XILINX_PLTFM) += xilinx_spi_pltfm.o
36	37	obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
37	38	obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
38	39	# ... add above this line ...
	1	+/*
	2	+ * Support for Xilinx SPI platform devices
	3	+ * Copyright (c) 2009 Intel Corporation
	4	+ *
	5	+ * This program is free software; you can redistribute it and/or modify
	6	+ * it under the terms of the GNU General Public License version 2 as
	7	+ * published by the Free Software Foundation.
	8	+ *
	9	+ * This program is distributed in the hope that it will be useful,
	10	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	+ * GNU General Public License for more details.
	13	+ *
	14	+ * You should have received a copy of the GNU General Public License
	15	+ * along with this program; if not, write to the Free Software
	16	+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	+ */
	18	+
	19	+/* Supports:
	20	+ * Xilinx SPI devices as platform devices
	21	+ *
	22	+ * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
	23	+ */
	24	+
	25	+#include <linux/module.h>
	26	+#include <linux/init.h>
	27	+#include <linux/interrupt.h>
	28	+#include <linux/io.h>
	29	+#include <linux/platform_device.h>
	30	+
	31	+#include <linux/spi/spi.h>
	32	+#include <linux/spi/spi_bitbang.h>
	33	+#include <linux/spi/xilinx_spi.h>
	34	+
	35	+#include "xilinx_spi.h"
	36	+
	37	+static int __devinit xilinx_spi_probe(struct platform_device *dev)
	38	+{
	39	+ struct xspi_platform_data *pdata;
	40	+ struct resource *r;
	41	+ int irq;
	42	+ struct spi_master *master;
	43	+ u8 i;
	44	+
	45	+ pdata = dev->dev.platform_data;
	46	+ if (!pdata)
	47	+ return -ENODEV;
	48	+
	49	+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
	50	+ if (!r)
	51	+ return -ENODEV;
	52	+
	53	+ irq = platform_get_irq(dev, 0);
	54	+ if (irq < 0)
	55	+ return -ENXIO;
	56	+
	57	+ master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
	58	+ if (!master)
	59	+ return -ENODEV;
	60	+
	61	+ for (i = 0; i < pdata->num_devices; i++)
	62	+ spi_new_device(master, pdata->devices + i);
	63	+
	64	+ platform_set_drvdata(dev, master);
	65	+ return 0;
	66	+}
	67	+
	68	+static int __devexit xilinx_spi_remove(struct platform_device *dev)
	69	+{
	70	+ xilinx_spi_deinit(platform_get_drvdata(dev));
	71	+ platform_set_drvdata(dev, 0);
	72	+
	73	+ return 0;
	74	+}
	75	+
	76	+/* work with hotplug and coldplug */
	77	+MODULE_ALIAS("platform:" XILINX_SPI_NAME);
	78	+
	79	+static struct platform_driver xilinx_spi_driver = {
	80	+ .probe = xilinx_spi_probe,
	81	+ .remove = __devexit_p(xilinx_spi_remove),
	82	+ .driver = {
	83	+ .name = XILINX_SPI_NAME,
	84	+ .owner = THIS_MODULE,
	85	+ },
	86	+};
	87	+
	88	+static int __init xilinx_spi_pltfm_init(void)
	89	+{
	90	+ return platform_driver_register(&xilinx_spi_driver);
	91	+}
	92	+module_init(xilinx_spi_pltfm_init);
	93	+
	94	+static void __exit xilinx_spi_pltfm_exit(void)
	95	+{
	96	+ platform_driver_unregister(&xilinx_spi_driver);
	97	+}
	98	+module_exit(xilinx_spi_pltfm_exit);
	99	+
	100	+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
	101	+MODULE_DESCRIPTION("Xilinx SPI platform driver");
	102	+MODULE_LICENSE("GPL v2");