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authorB, Ravi <ravibabu@ti.com>2012-08-31 11:09:49 +0000
committerFelipe Balbi <balbi@ti.com>2012-09-11 17:34:41 +0300
commit65b3d52d02a558fbfe08e43688e15390c5ab3067 (patch)
tree0082a0e45c26ff015a7b0976e917c83d87db8e70 /drivers/usb/musb/musb_core.c
parent00a0b1d58af873d842580dcac55f3b156c3a4077 (diff)
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>
Diffstat (limited to 'drivers/usb/musb/musb_core.c')
-rw-r--r--drivers/usb/musb/musb_core.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 5cacccbc39b5..61b64fced256 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 @@ static inline struct musb *dev_to_musb(struct device *dev)
/*-------------------------------------------------------------------------*/
+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)
{

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