linux-kernel - [PATCH] x86: intel-mid: add test module for sfi

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Message-Id: <1384370961-30847-1-git-send-email-david.a.cohen@linux.intel.com>
Date:	Wed, 13 Nov 2013 11:29:21 -0800
From:	David Cohen <david.a.cohen@...ux.intel.com>
To:	mingo@...nel.org, hch@...radead.org, hpa@...or.com
Cc:	tglx@...utronix.de, x86@...nel.org, linux-kernel@...r.kernel.org,
	lenb@...nel.org, David Cohen <david.a.cohen@...ux.intel.com>
Subject: [PATCH] x86: intel-mid: add test module for sfi_device()

This patch adds a test module to validate sfi_device() when used from a
driver module.

Signed-off-by: David Cohen <david.a.cohen@...ux.intel.com>
---

Hi Ingo and Christoph,

Does this test module make sense to you?
This could be the 4th patch of this series.

Br, David

---
 arch/x86/Kconfig                                   |  9 +++++
 arch/x86/platform/intel-mid/device_libs/Makefile   |  2 ++
 .../intel-mid/device_libs/platform_sfi_test.c      | 42 ++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 arch/x86/platform/intel-mid/device_libs/platform_sfi_test.c

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c5f3414e453d..0b55a7742b65 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -457,6 +457,15 @@ config X86_INTEL_MID
 	  systems which do not have the PCI legacy interfaces (Moorestown,
 	  Medfield). If you are building for a PC class system say N here.
 
+config SFI_TEST_MODULE
+	tristate "Intel MID sfi test module"
+	depends on SFI && X86_INTEL_MID && m
+	---help---
+	  Select to build a test module to validate SFI devices on Intel MID
+	  platforms from driver modules.
+
+	  This module will be called platform_sfi_test.ko
+
 config X86_INTEL_LPSS
 	bool "Intel Low Power Subsystem Support"
 	depends on ACPI
diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index 097e7a7940d8..b4e858e5c6e9 100644
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -20,3 +20,5 @@ obj-$(subst m,y,$(CONFIG_DRM_MEDFIELD)) += platform_tc35876x.o
 obj-$(subst m,y,$(CONFIG_SERIAL_MRST_MAX3110)) += platform_max3111.o
 # MISC Devices
 obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o
+# Test
+obj-$(CONFIG_SFI_TEST_MODULE) += platform_sfi_test.o
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_sfi_test.c b/arch/x86/platform/intel-mid/device_libs/platform_sfi_test.c
new file mode 100644
index 000000000000..79cc18461eba
--- /dev/null
+++ b/arch/x86/platform/intel-mid/device_libs/platform_sfi_test.c
@@ -0,0 +1,42 @@
+/*
+ * platform_sfi_test.c: test module for sfi_device()
+ *
+ * (C) Copyright 2013 Intel Corporation
+ * Author: David Cohen <david.a.cohen@...ux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/module.h>
+#include <asm/intel-mid.h>
+
+/*
+ * Even though we're implementing this device_handler callback, it should
+ * never be called when loading the module because the sfi device name
+ * "I'm_not_here" won't match to any entry on sfi table.
+ *
+ * This test validates compilation of sfi_device() in modules and validates
+ * that the attempt to enumerate an sfi device as module doesn't goes bad
+ * (despite the sfi module won't be found, the code to do the match it will be
+ * used).
+ */
+static void
+sfi_test_dev_handler(struct sfi_device_table_entry *pentry, struct devs_id *dev)
+{
+	pr_info("%s: This is a test for sfi_device() as module\n", __func__);
+}
+
+static const struct devs_id sfi_test_dev_id __initconst = {
+	.name = "I'm_not_here",
+	.type = SFI_DEV_TYPE_UART,
+	.device_handler = sfi_test_dev_handler,
+};
+
+sfi_device(sfi_test_dev_id);
+
+MODULE_AUTHOR("David Cohen <david.a.cohen@...ux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("This module provides test for sfi_device() macro");
-- 
1.8.4.2

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