linux-kernel - [PATCH V2 1/2] mic: vop: module autoprobing support for vop drivers

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Message-Id: <20200929080214.23553-2-sherry.sun@nxp.com>
Date:   Tue, 29 Sep 2020 16:02:13 +0800
From:   Sherry Sun <sherry.sun@....com>
To:     sudeep.dutt@...el.com, ashutosh.dixit@...el.com, arnd@...db.de,
        gregkh@...uxfoundation.org, masahiroy@...nel.org,
        michal.lkml@...kovi.net, lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, linux-imx@....com,
        linux-kbuild@...r.kernel.org
Subject: [PATCH V2 1/2] mic: vop: module autoprobing support for vop drivers

Add vop autoprobing support to MODULE_DEVICE_TABLE() by adding info
about struct vop_device_id in devicetable-offsets.c and add a vop entry
point in file2alias.c.

The type argument for MODULE_DEVICE_TABLE(type, name) is vop.

Signed-off-by: Sherry Sun <sherry.sun@....com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
 drivers/misc/mic/bus/vop_bus.h    |  7 +------
 drivers/misc/mic/vop/vop_main.c   |  2 +-
 include/linux/mod_devicetable.h   |  7 +++++++
 scripts/mod/devicetable-offsets.c |  4 ++++
 scripts/mod/file2alias.c          | 16 ++++++++++++++++
 5 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/mic/bus/vop_bus.h b/drivers/misc/mic/bus/vop_bus.h
index d891eacae358..5b4a58757951 100644
--- a/drivers/misc/mic/bus/vop_bus.h
+++ b/drivers/misc/mic/bus/vop_bus.h
@@ -14,16 +14,11 @@
  */
 #include <linux/dmaengine.h>
 #include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
 
 #include "../common/mic_dev.h"
 
-struct vop_device_id {
-	u32 device;
-	u32 vendor;
-};
-
 #define VOP_DEV_TRNSP 1
-#define VOP_DEV_ANY_ID 0xffffffff
 /*
  * Size of the internal buffer used during DMA's as an intermediate buffer
  * for copy to/from user. Must be an integral number of pages.
diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c
index 1ccc94dfd6ac..f1e908286843 100644
--- a/drivers/misc/mic/vop/vop_main.c
+++ b/drivers/misc/mic/vop/vop_main.c
@@ -742,7 +742,7 @@ static struct vop_driver vop_driver = {
 
 module_vop_driver(vop_driver);
 
-MODULE_DEVICE_TABLE(mbus, id_table);
+MODULE_DEVICE_TABLE(vop, id_table);
 MODULE_AUTHOR("Intel Corporation");
 MODULE_DESCRIPTION("Intel(R) Virtio Over PCIe (VOP) driver");
 MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 5b08a473cdba..736cdc236cf9 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -838,4 +838,11 @@ struct mhi_device_id {
 	kernel_ulong_t driver_data;
 };
 
+/* vop */
+struct vop_device_id {
+	__u32 device;
+	__u32 vendor;
+};
+#define VOP_DEV_ANY_ID	0xffffffff
+
 #endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index 27007c18e754..393acaa5302a 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -243,5 +243,9 @@ int main(void)
 	DEVID(mhi_device_id);
 	DEVID_FIELD(mhi_device_id, chan);
 
+	DEVID(vop_device_id);
+	DEVID_FIELD(vop_device_id, device);
+	DEVID_FIELD(vop_device_id, vendor);
+
 	return 0;
 }
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 2417dd1dee33..8063b778eedf 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1368,6 +1368,21 @@ static int do_mhi_entry(const char *filename, void *symval, char *alias)
 	return 1;
 }
 
+/* Looks like: vop:dNvN */
+static int do_vop_entry(const char *filename, void *symval,
+			   char *alias)
+{
+	DEF_FIELD(symval, vop_device_id, device);
+	DEF_FIELD(symval, vop_device_id, vendor);
+
+	strcpy(alias, "vop:");
+	ADD(alias, "d", device != VOP_DEV_ANY_ID, device);
+	ADD(alias, "v", vendor != VOP_DEV_ANY_ID, vendor);
+
+	add_wildcard(alias);
+	return 1;
+}
+
 /* Does namelen bytes of name exactly match the symbol? */
 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
 {
@@ -1442,6 +1457,7 @@ static const struct devtable devtable[] = {
 	{"tee", SIZE_tee_client_device_id, do_tee_entry},
 	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
 	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
+	{"vop", SIZE_vop_device_id, do_vop_entry},
 };
 
 /* Create MODULE_ALIAS() statements.
-- 
2.17.1