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usb: gadget: composite: Set recommended BESL values

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Set the recommended BESL deep and baseline values based on the gadget's
configuration parameters to the extended BOS descriptor. This feature
helps to optimize power savings by maximizing the opportunity for longer
L1 residency time.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Thinh Nguyen 2019-08-19 18:36:12 -07:00 • committed by Felipe Balbi
parent 54fb5ba647
commit cca3854010
2 changed files with 28 additions and 12 deletions
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2
include/uapi/linux/usb/ch9.h
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@ -894,6 +894,8 @@ struct usb_ext_cap_descriptor { /* Link Power Management */
#define USB_BESL_SUPPORT (1 << 2) /* supports BESL */
#define USB_BESL_BASELINE_VALID (1 << 3) /* Baseline BESL valid*/
#define USB_BESL_DEEP_VALID (1 << 4) /* Deep BESL valid */
#define USB_SET_BESL_BASELINE(p) (((p) & 0xf) << 8)
#define USB_SET_BESL_DEEP(p) (((p) & 0xf) << 12)
#define USB_GET_BESL_BASELINE(p) (((p) & (0xf << 8)) >> 8)
#define USB_GET_BESL_DEEP(p) (((p) & (0xf << 12)) >> 12)
} __attribute__((packed));