From patchwork Sun Jul 11 00:43:09 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 111263 X-Patchwork-Delegate: grant.likely@secretlab.ca Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o6B1L1l0002941 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 11 Jul 2010 01:21:37 GMT Received: from localhost ([127.0.0.1] helo=sfs-ml-1.v29.ch3.sourceforge.com) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1OXlE5-0001Hh-3n; Sun, 11 Jul 2010 01:21:01 +0000 Received: from sfi-mx-3.v28.ch3.sourceforge.com ([172.29.28.123] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1OXlE4-0001HY-Fr for spi-devel-general@lists.sourceforge.net; Sun, 11 Jul 2010 01:21:00 +0000 X-ACL-Warn: Received: from mail.df.lth.se ([194.47.250.12] helo=df.lth.se) by sfi-mx-3.v28.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1OXlE2-00021U-UK for spi-devel-general@lists.sourceforge.net; Sun, 11 Jul 2010 01:21:00 +0000 Received: from mer.df.lth.se (mer.df.lth.se [194.47.250.37]) by df.lth.se (8.14.2/8.13.7) with ESMTP id o6B0g1LO029173 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sun, 11 Jul 2010 02:42:02 +0200 (CEST) Received: from mer.df.lth.se (triad@localhost.localdomain [127.0.0.1]) by mer.df.lth.se (8.14.3/8.14.3/Debian-9.1) with ESMTP id o6B0hDnP029936; Sun, 11 Jul 2010 02:43:13 +0200 Received: (from triad@localhost) by mer.df.lth.se (8.14.3/8.14.3/Submit) id o6B0hCRC029935; Sun, 11 Jul 2010 02:43:12 +0200 From: Linus Walleij To: spi-devel-general@lists.sourceforge.net, Grant Likely Date: Sun, 11 Jul 2010 02:43:09 +0200 Message-Id: <1278808989-29677-1-git-send-email-linus.walleij@stericsson.com> X-Mailer: git-send-email 1.6.2.rc1 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. _SUMMARY_ X-Headers-End: 1OXlE2-00021U-UK Cc: Linus Walleij , linux-arm-kernel@lists.infradead.org Subject: [spi-devel-general] [PATCH 1/2] SPI: moved the PL022 test chip out to the SPI subsystem X-BeenThere: spi-devel-general@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux SPI core/device drivers discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: spi-devel-general-bounces@lists.sourceforge.net X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sun, 11 Jul 2010 01:21:37 +0000 (UTC) diff --git a/arch/arm/mach-u300/dummyspichip.c b/arch/arm/mach-u300/dummyspichip.c deleted file mode 100644 index 5f55012..0000000 --- a/arch/arm/mach-u300/dummyspichip.c +++ /dev/null @@ -1,291 +0,0 @@ -/* - * arch/arm/mach-u300/dummyspichip.c - * - * Copyright (C) 2007-2009 ST-Ericsson AB - * License terms: GNU General Public License (GPL) version 2 - * This is a dummy loopback SPI "chip" used for testing SPI. - * Author: Linus Walleij - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -/* - * WARNING! Do not include this pl022-specific controller header - * for any generic driver. It is only done in this dummy chip - * because we alter the chip configuration in order to test some - * different settings on the loopback device. Normal chip configs - * shall be STATIC and not altered by the driver! - */ -#include - -struct dummy { - struct device *dev; - struct mutex lock; -}; - -#define DMA_TEST_SIZE 2048 - -/* When we cat /sys/bus/spi/devices/spi0.0/looptest this will be triggered */ -static ssize_t dummy_looptest(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct spi_device *spi = to_spi_device(dev); - struct dummy *p_dummy = dev_get_drvdata(&spi->dev); - - /* - * WARNING! Do not dereference the chip-specific data in any normal - * driver for a chip. It is usually STATIC and shall not be read - * or written to. Your chip driver should NOT depend on fields in this - * struct, this is just used here to alter the behaviour of the chip - * in order to perform tests. - */ - struct pl022_config_chip *chip_info = spi->controller_data; - int status; - u8 txbuf[14] = {0xDE, 0xAD, 0xBE, 0xEF, 0x2B, 0xAD, - 0xCA, 0xFE, 0xBA, 0xBE, 0xB1, 0x05, - 0xF0, 0x0D}; - u8 rxbuf[14]; - u8 *bigtxbuf_virtual; - u8 *bigrxbuf_virtual; - - if (mutex_lock_interruptible(&p_dummy->lock)) - return -ERESTARTSYS; - - bigtxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL); - if (bigtxbuf_virtual == NULL) { - status = -ENOMEM; - goto out; - } - bigrxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL); - - /* Fill TXBUF with some happy pattern */ - memset(bigtxbuf_virtual, 0xAA, DMA_TEST_SIZE); - - /* - * Force chip to 8 bit mode - * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC! - */ - chip_info->data_size = SSP_DATA_BITS_8; - /* You should NOT DO THIS EITHER */ - spi->master->setup(spi); - - /* Now run the tests for 8bit mode */ - pr_info("Simple test 1: write 0xAA byte, read back garbage byte " - "in 8bit mode\n"); - status = spi_w8r8(spi, 0xAA); - if (status < 0) - pr_warning("Siple test 1: FAILURE: spi_write_then_read " - "failed with status %d\n", status); - else - pr_info("Simple test 1: SUCCESS!\n"); - - pr_info("Simple test 2: write 8 bytes, read back 8 bytes garbage " - "in 8bit mode (full FIFO)\n"); - status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8); - if (status < 0) - pr_warning("Simple test 2: FAILURE: spi_write_then_read() " - "failed with status %d\n", status); - else - pr_info("Simple test 2: SUCCESS!\n"); - - pr_info("Simple test 3: write 14 bytes, read back 14 bytes garbage " - "in 8bit mode (see if we overflow FIFO)\n"); - status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14); - if (status < 0) - pr_warning("Simple test 3: FAILURE: failed with status %d " - "(probably FIFO overrun)\n", status); - else - pr_info("Simple test 3: SUCCESS!\n"); - - pr_info("Simple test 4: write 8 bytes with spi_write(), read 8 " - "bytes garbage with spi_read() in 8bit mode\n"); - status = spi_write(spi, &txbuf[0], 8); - if (status < 0) - pr_warning("Simple test 4 step 1: FAILURE: spi_write() " - "failed with status %d\n", status); - else - pr_info("Simple test 4 step 1: SUCCESS!\n"); - status = spi_read(spi, &rxbuf[0], 8); - if (status < 0) - pr_warning("Simple test 4 step 2: FAILURE: spi_read() " - "failed with status %d\n", status); - else - pr_info("Simple test 4 step 2: SUCCESS!\n"); - - pr_info("Simple test 5: write 14 bytes with spi_write(), read " - "14 bytes garbage with spi_read() in 8bit mode\n"); - status = spi_write(spi, &txbuf[0], 14); - if (status < 0) - pr_warning("Simple test 5 step 1: FAILURE: spi_write() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 5 step 1: SUCCESS!\n"); - status = spi_read(spi, &rxbuf[0], 14); - if (status < 0) - pr_warning("Simple test 5 step 2: FAILURE: spi_read() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 5: SUCCESS!\n"); - - pr_info("Simple test 6: write %d bytes with spi_write(), " - "read %d bytes garbage with spi_read() in 8bit mode\n", - DMA_TEST_SIZE, DMA_TEST_SIZE); - status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE); - if (status < 0) - pr_warning("Simple test 6 step 1: FAILURE: spi_write() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 6 step 1: SUCCESS!\n"); - status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE); - if (status < 0) - pr_warning("Simple test 6 step 2: FAILURE: spi_read() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 6: SUCCESS!\n"); - - - /* - * Force chip to 16 bit mode - * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC! - */ - chip_info->data_size = SSP_DATA_BITS_16; - /* You should NOT DO THIS EITHER */ - spi->master->setup(spi); - - pr_info("Simple test 7: write 0xAA byte, read back garbage byte " - "in 16bit bus mode\n"); - status = spi_w8r8(spi, 0xAA); - if (status == -EIO) - pr_info("Simple test 7: SUCCESS! (expected failure with " - "status EIO)\n"); - else if (status < 0) - pr_warning("Siple test 7: FAILURE: spi_write_then_read " - "failed with status %d\n", status); - else - pr_warning("Siple test 7: FAILURE: spi_write_then_read " - "succeeded but it was expected to fail!\n"); - - pr_info("Simple test 8: write 8 bytes, read back 8 bytes garbage " - "in 16bit mode (full FIFO)\n"); - status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8); - if (status < 0) - pr_warning("Simple test 8: FAILURE: spi_write_then_read() " - "failed with status %d\n", status); - else - pr_info("Simple test 8: SUCCESS!\n"); - - pr_info("Simple test 9: write 14 bytes, read back 14 bytes garbage " - "in 16bit mode (see if we overflow FIFO)\n"); - status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14); - if (status < 0) - pr_warning("Simple test 9: FAILURE: failed with status %d " - "(probably FIFO overrun)\n", status); - else - pr_info("Simple test 9: SUCCESS!\n"); - - pr_info("Simple test 10: write %d bytes with spi_write(), " - "read %d bytes garbage with spi_read() in 16bit mode\n", - DMA_TEST_SIZE, DMA_TEST_SIZE); - status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE); - if (status < 0) - pr_warning("Simple test 10 step 1: FAILURE: spi_write() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 10 step 1: SUCCESS!\n"); - - status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE); - if (status < 0) - pr_warning("Simple test 10 step 2: FAILURE: spi_read() " - "failed with status %d (probably FIFO overrun)\n", - status); - else - pr_info("Simple test 10: SUCCESS!\n"); - - status = sprintf(buf, "loop test complete\n"); - kfree(bigrxbuf_virtual); - kfree(bigtxbuf_virtual); - out: - mutex_unlock(&p_dummy->lock); - return status; -} - -static DEVICE_ATTR(looptest, S_IRUGO, dummy_looptest, NULL); - -static int __devinit pl022_dummy_probe(struct spi_device *spi) -{ - struct dummy *p_dummy; - int status; - - dev_info(&spi->dev, "probing dummy SPI device\n"); - - p_dummy = kzalloc(sizeof *p_dummy, GFP_KERNEL); - if (!p_dummy) - return -ENOMEM; - - dev_set_drvdata(&spi->dev, p_dummy); - mutex_init(&p_dummy->lock); - - /* sysfs hook */ - status = device_create_file(&spi->dev, &dev_attr_looptest); - if (status) { - dev_dbg(&spi->dev, "device_create_file looptest failure.\n"); - goto out_dev_create_looptest_failed; - } - - return 0; - -out_dev_create_looptest_failed: - dev_set_drvdata(&spi->dev, NULL); - kfree(p_dummy); - return status; -} - -static int __devexit pl022_dummy_remove(struct spi_device *spi) -{ - struct dummy *p_dummy = dev_get_drvdata(&spi->dev); - - dev_info(&spi->dev, "removing dummy SPI device\n"); - device_remove_file(&spi->dev, &dev_attr_looptest); - dev_set_drvdata(&spi->dev, NULL); - kfree(p_dummy); - - return 0; -} - -static struct spi_driver pl022_dummy_driver = { - .driver = { - .name = "spi-dummy", - .owner = THIS_MODULE, - }, - .probe = pl022_dummy_probe, - .remove = __devexit_p(pl022_dummy_remove), -}; - -static int __init pl022_init_dummy(void) -{ - return spi_register_driver(&pl022_dummy_driver); -} - -static void __exit pl022_exit_dummy(void) -{ - spi_unregister_driver(&pl022_dummy_driver); -} - -module_init(pl022_init_dummy); -module_exit(pl022_exit_dummy); - -MODULE_AUTHOR("Linus Walleij "); -MODULE_DESCRIPTION("PL022 SSP/SPI DUMMY Linux driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/spi/amba-pl022-looptest.c b/drivers/spi/amba-pl022-looptest.c new file mode 100644 index 0000000..5f55012 --- /dev/null +++ b/drivers/spi/amba-pl022-looptest.c @@ -0,0 +1,291 @@ +/* + * arch/arm/mach-u300/dummyspichip.c + * + * Copyright (C) 2007-2009 ST-Ericsson AB + * License terms: GNU General Public License (GPL) version 2 + * This is a dummy loopback SPI "chip" used for testing SPI. + * Author: Linus Walleij + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +/* + * WARNING! Do not include this pl022-specific controller header + * for any generic driver. It is only done in this dummy chip + * because we alter the chip configuration in order to test some + * different settings on the loopback device. Normal chip configs + * shall be STATIC and not altered by the driver! + */ +#include + +struct dummy { + struct device *dev; + struct mutex lock; +}; + +#define DMA_TEST_SIZE 2048 + +/* When we cat /sys/bus/spi/devices/spi0.0/looptest this will be triggered */ +static ssize_t dummy_looptest(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct spi_device *spi = to_spi_device(dev); + struct dummy *p_dummy = dev_get_drvdata(&spi->dev); + + /* + * WARNING! Do not dereference the chip-specific data in any normal + * driver for a chip. It is usually STATIC and shall not be read + * or written to. Your chip driver should NOT depend on fields in this + * struct, this is just used here to alter the behaviour of the chip + * in order to perform tests. + */ + struct pl022_config_chip *chip_info = spi->controller_data; + int status; + u8 txbuf[14] = {0xDE, 0xAD, 0xBE, 0xEF, 0x2B, 0xAD, + 0xCA, 0xFE, 0xBA, 0xBE, 0xB1, 0x05, + 0xF0, 0x0D}; + u8 rxbuf[14]; + u8 *bigtxbuf_virtual; + u8 *bigrxbuf_virtual; + + if (mutex_lock_interruptible(&p_dummy->lock)) + return -ERESTARTSYS; + + bigtxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL); + if (bigtxbuf_virtual == NULL) { + status = -ENOMEM; + goto out; + } + bigrxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL); + + /* Fill TXBUF with some happy pattern */ + memset(bigtxbuf_virtual, 0xAA, DMA_TEST_SIZE); + + /* + * Force chip to 8 bit mode + * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC! + */ + chip_info->data_size = SSP_DATA_BITS_8; + /* You should NOT DO THIS EITHER */ + spi->master->setup(spi); + + /* Now run the tests for 8bit mode */ + pr_info("Simple test 1: write 0xAA byte, read back garbage byte " + "in 8bit mode\n"); + status = spi_w8r8(spi, 0xAA); + if (status < 0) + pr_warning("Siple test 1: FAILURE: spi_write_then_read " + "failed with status %d\n", status); + else + pr_info("Simple test 1: SUCCESS!\n"); + + pr_info("Simple test 2: write 8 bytes, read back 8 bytes garbage " + "in 8bit mode (full FIFO)\n"); + status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8); + if (status < 0) + pr_warning("Simple test 2: FAILURE: spi_write_then_read() " + "failed with status %d\n", status); + else + pr_info("Simple test 2: SUCCESS!\n"); + + pr_info("Simple test 3: write 14 bytes, read back 14 bytes garbage " + "in 8bit mode (see if we overflow FIFO)\n"); + status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14); + if (status < 0) + pr_warning("Simple test 3: FAILURE: failed with status %d " + "(probably FIFO overrun)\n", status); + else + pr_info("Simple test 3: SUCCESS!\n"); + + pr_info("Simple test 4: write 8 bytes with spi_write(), read 8 " + "bytes garbage with spi_read() in 8bit mode\n"); + status = spi_write(spi, &txbuf[0], 8); + if (status < 0) + pr_warning("Simple test 4 step 1: FAILURE: spi_write() " + "failed with status %d\n", status); + else + pr_info("Simple test 4 step 1: SUCCESS!\n"); + status = spi_read(spi, &rxbuf[0], 8); + if (status < 0) + pr_warning("Simple test 4 step 2: FAILURE: spi_read() " + "failed with status %d\n", status); + else + pr_info("Simple test 4 step 2: SUCCESS!\n"); + + pr_info("Simple test 5: write 14 bytes with spi_write(), read " + "14 bytes garbage with spi_read() in 8bit mode\n"); + status = spi_write(spi, &txbuf[0], 14); + if (status < 0) + pr_warning("Simple test 5 step 1: FAILURE: spi_write() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 5 step 1: SUCCESS!\n"); + status = spi_read(spi, &rxbuf[0], 14); + if (status < 0) + pr_warning("Simple test 5 step 2: FAILURE: spi_read() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 5: SUCCESS!\n"); + + pr_info("Simple test 6: write %d bytes with spi_write(), " + "read %d bytes garbage with spi_read() in 8bit mode\n", + DMA_TEST_SIZE, DMA_TEST_SIZE); + status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE); + if (status < 0) + pr_warning("Simple test 6 step 1: FAILURE: spi_write() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 6 step 1: SUCCESS!\n"); + status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE); + if (status < 0) + pr_warning("Simple test 6 step 2: FAILURE: spi_read() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 6: SUCCESS!\n"); + + + /* + * Force chip to 16 bit mode + * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC! + */ + chip_info->data_size = SSP_DATA_BITS_16; + /* You should NOT DO THIS EITHER */ + spi->master->setup(spi); + + pr_info("Simple test 7: write 0xAA byte, read back garbage byte " + "in 16bit bus mode\n"); + status = spi_w8r8(spi, 0xAA); + if (status == -EIO) + pr_info("Simple test 7: SUCCESS! (expected failure with " + "status EIO)\n"); + else if (status < 0) + pr_warning("Siple test 7: FAILURE: spi_write_then_read " + "failed with status %d\n", status); + else + pr_warning("Siple test 7: FAILURE: spi_write_then_read " + "succeeded but it was expected to fail!\n"); + + pr_info("Simple test 8: write 8 bytes, read back 8 bytes garbage " + "in 16bit mode (full FIFO)\n"); + status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8); + if (status < 0) + pr_warning("Simple test 8: FAILURE: spi_write_then_read() " + "failed with status %d\n", status); + else + pr_info("Simple test 8: SUCCESS!\n"); + + pr_info("Simple test 9: write 14 bytes, read back 14 bytes garbage " + "in 16bit mode (see if we overflow FIFO)\n"); + status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14); + if (status < 0) + pr_warning("Simple test 9: FAILURE: failed with status %d " + "(probably FIFO overrun)\n", status); + else + pr_info("Simple test 9: SUCCESS!\n"); + + pr_info("Simple test 10: write %d bytes with spi_write(), " + "read %d bytes garbage with spi_read() in 16bit mode\n", + DMA_TEST_SIZE, DMA_TEST_SIZE); + status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE); + if (status < 0) + pr_warning("Simple test 10 step 1: FAILURE: spi_write() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 10 step 1: SUCCESS!\n"); + + status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE); + if (status < 0) + pr_warning("Simple test 10 step 2: FAILURE: spi_read() " + "failed with status %d (probably FIFO overrun)\n", + status); + else + pr_info("Simple test 10: SUCCESS!\n"); + + status = sprintf(buf, "loop test complete\n"); + kfree(bigrxbuf_virtual); + kfree(bigtxbuf_virtual); + out: + mutex_unlock(&p_dummy->lock); + return status; +} + +static DEVICE_ATTR(looptest, S_IRUGO, dummy_looptest, NULL); + +static int __devinit pl022_dummy_probe(struct spi_device *spi) +{ + struct dummy *p_dummy; + int status; + + dev_info(&spi->dev, "probing dummy SPI device\n"); + + p_dummy = kzalloc(sizeof *p_dummy, GFP_KERNEL); + if (!p_dummy) + return -ENOMEM; + + dev_set_drvdata(&spi->dev, p_dummy); + mutex_init(&p_dummy->lock); + + /* sysfs hook */ + status = device_create_file(&spi->dev, &dev_attr_looptest); + if (status) { + dev_dbg(&spi->dev, "device_create_file looptest failure.\n"); + goto out_dev_create_looptest_failed; + } + + return 0; + +out_dev_create_looptest_failed: + dev_set_drvdata(&spi->dev, NULL); + kfree(p_dummy); + return status; +} + +static int __devexit pl022_dummy_remove(struct spi_device *spi) +{ + struct dummy *p_dummy = dev_get_drvdata(&spi->dev); + + dev_info(&spi->dev, "removing dummy SPI device\n"); + device_remove_file(&spi->dev, &dev_attr_looptest); + dev_set_drvdata(&spi->dev, NULL); + kfree(p_dummy); + + return 0; +} + +static struct spi_driver pl022_dummy_driver = { + .driver = { + .name = "spi-dummy", + .owner = THIS_MODULE, + }, + .probe = pl022_dummy_probe, + .remove = __devexit_p(pl022_dummy_remove), +}; + +static int __init pl022_init_dummy(void) +{ + return spi_register_driver(&pl022_dummy_driver); +} + +static void __exit pl022_exit_dummy(void) +{ + spi_unregister_driver(&pl022_dummy_driver); +} + +module_init(pl022_init_dummy); +module_exit(pl022_exit_dummy); + +MODULE_AUTHOR("Linus Walleij "); +MODULE_DESCRIPTION("PL022 SSP/SPI DUMMY Linux driver"); +MODULE_LICENSE("GPL");