usb: musb: add musb_ida for multi instance support
Added musb_ida in musb_core.c to manage the multi core ids.
Signed-off-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Santhapuri, Damodar <damodar.santhapuri@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 5cacccb..61b64fc 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -99,6 +99,7 @@
#include <linux/prefetch.h>
#include <linux/platform_device.h>
#include <linux/io.h>
+#include <linux/idr.h>
#include "musb_core.h"
@@ -114,6 +115,7 @@
#define MUSB_DRIVER_NAME "musb-hdrc"
const char musb_driver_name[] = MUSB_DRIVER_NAME;
+static DEFINE_IDA(musb_ida);
MODULE_DESCRIPTION(DRIVER_INFO);
MODULE_AUTHOR(DRIVER_AUTHOR);
@@ -130,6 +132,35 @@
/*-------------------------------------------------------------------------*/
+int musb_get_id(struct device *dev, gfp_t gfp_mask)
+{
+ int ret;
+ int id;
+
+ ret = ida_pre_get(&musb_ida, gfp_mask);
+ if (!ret) {
+ dev_err(dev, "failed to reserve resource for id\n");
+ return -ENOMEM;
+ }
+
+ ret = ida_get_new(&musb_ida, &id);
+ if (ret < 0) {
+ dev_err(dev, "failed to allocate a new id\n");
+ return ret;
+ }
+
+ return id;
+}
+EXPORT_SYMBOL_GPL(musb_get_id);
+
+void musb_put_id(struct device *dev, int id)
+{
+
+ dev_dbg(dev, "removing id %d\n", id);
+ ida_remove(&musb_ida, id);
+}
+EXPORT_SYMBOL_GPL(musb_put_id);
+
#ifndef CONFIG_BLACKFIN
static int musb_ulpi_read(struct usb_phy *phy, u32 offset)
{