dpa_offload: Add DPA Stats driver support for udev devices

The device file in the file system is created automatically at init by
the driver without need of any mknod commands.

Change-Id: Ib0d5d4a47d3e92ec3d7a8813223017e0c24503a5
Signed-off-by: Aurelian Zanoschi <Aurelian.Zanoschi@freescale.com>
Reviewed-on: http://git.am.freescale.net:8181/2881
Reviewed-by: Varvara Andrei-B21317 <andrei.varvara@freescale.com>
Reviewed-by: Floarea Anca Jeanina-B12569 <anca.floarea@freescale.com>
Reviewed-by: Chereji Marian-Cornel-R27762 <marian.chereji@freescale.com>
Reviewed-by: Bulie Radu-Andrei-B37577 <Radu.Bulie@freescale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/staging/fsl_dpa_offload/wrp_dpa_stats.c b/drivers/staging/fsl_dpa_offload/wrp_dpa_stats.c
index 4903afc..5c2cb90 100644
--- a/drivers/staging/fsl_dpa_offload/wrp_dpa_stats.c
+++ b/drivers/staging/fsl_dpa_offload/wrp_dpa_stats.c
@@ -67,6 +67,8 @@ static const struct file_operations dpa_stats_fops = {
 DECLARE_CRC8_TABLE(crc8_table);
 
 static int dpa_stats_cdev_major = -1;
+static struct class *stats_class;
+static struct device *stats_dev;
 
 struct wrp_dpa_stats_cb wrp_dpa_stats;
 
@@ -177,6 +179,24 @@ int wrp_dpa_stats_init(void)
 		return dpa_stats_cdev_major;
 	}
 
+	stats_class = class_create(THIS_MODULE, DPA_STATS_CDEV);
+	if (IS_ERR(stats_class)) {
+		log_err("Cannot create DPA Stats class device\n");
+		unregister_chrdev(dpa_stats_cdev_major, DPA_STATS_CDEV);
+		dpa_stats_cdev_major = -1;
+		return PTR_ERR(stats_class);
+	}
+
+	stats_dev = device_create(stats_class, NULL,
+			MKDEV(dpa_stats_cdev_major, 0), NULL, DPA_STATS_CDEV);
+	if (IS_ERR(stats_dev)) {
+		log_err("Cannot create DPA Stats device\n");
+		class_destroy(stats_class);
+		unregister_chrdev(dpa_stats_cdev_major, DPA_STATS_CDEV);
+		dpa_stats_cdev_major = -1;
+		return PTR_ERR(stats_dev);
+	}
+
 	/* Initialize the event queue */
 	wrp_dpa_stats_event_queue_init(&wrp_dpa_stats.ev_queue);
 
@@ -187,6 +207,8 @@ int wrp_dpa_stats_exit(void)
 {
 	if (dpa_stats_cdev_major < 0)
 		return 0;
+	device_destroy(stats_class, MKDEV(dpa_stats_cdev_major, 0));
+	class_destroy(stats_class);
 	unregister_chrdev(dpa_stats_cdev_major, DPA_STATS_CDEV);
 	dpa_stats_cdev_major = -1;