diff mbox

[v2,1/2,media] tm6000: Add fast USB access quirk

Message ID 1314859384-31465-1-git-send-email-thierry.reding@avionic-design.de (mailing list archive)
State New, archived
Headers show

Commit Message

Thierry Reding Sept. 1, 2011, 6:43 a.m. UTC 
Some devices support fast access to registers using the USB interface
while others require a certain delay after each operation. This commit
adds a quirk that can be enabled by devices that don't need the delay.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
---
 drivers/staging/tm6000/tm6000-core.c |    3 ++-
 drivers/staging/tm6000/tm6000.h      |    4 ++++
 2 files changed, 6 insertions(+), 1 deletions(-)
diff mbox

Patch

diff --git a/drivers/staging/tm6000/tm6000-core.c b/drivers/staging/tm6000/tm6000-core.c
index 64fc1c6..93a0772 100644
--- a/drivers/staging/tm6000/tm6000-core.c
+++ b/drivers/staging/tm6000/tm6000-core.c
@@ -89,7 +89,8 @@  int tm6000_read_write_usb(struct tm6000_core *dev, u8 req_type, u8 req,
 
 	kfree(data);
 
-	msleep(5);
+	if ((dev->quirks & TM6000_QUIRK_NO_USB_DELAY) == 0)
+		msleep(5);
 
 	mutex_unlock(&dev->usb_lock);
 	return ret;
diff --git a/drivers/staging/tm6000/tm6000.h b/drivers/staging/tm6000/tm6000.h
index dac2063..5bdce84 100644
--- a/drivers/staging/tm6000/tm6000.h
+++ b/drivers/staging/tm6000/tm6000.h
@@ -169,6 +169,8 @@  struct tm6000_endpoint {
 	unsigned			maxsize;
 };
 
+#define TM6000_QUIRK_NO_USB_DELAY (1 << 0)
+
 struct tm6000_core {
 	/* generic device properties */
 	char				name[30];	/* name (including minor) of the device */
@@ -260,6 +262,8 @@  struct tm6000_core {
 	struct usb_isoc_ctl          isoc_ctl;
 
 	spinlock_t                   slock;
+
+	unsigned long quirks;
 };
 
 enum tm6000_ops_type {