Commit 022a0208 authored by Thinh Nguyen's avatar Thinh Nguyen Committed by Felipe Balbi
Browse files

usb: dwc3: Support option to disable USB2 LPM 



Support the option to disable USB2 LPM. Set xhci "usb2-lpm-disable"
property via "snps,usb2-lpm-disable" property.

Signed-off-by: default avatarThinh Nguyen <thinhn@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 5455e156

drivers/usb/dwc3/core.c

+2 −0
Original line number Diff line number Diff line
@@ -1248,6 +1248,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) 
				&hird_threshold);

	dwc->usb3_lpm_capable = device_property_read_bool(dev,

				"snps,usb3_lpm_capable");

	dwc->usb2_lpm_disable = device_property_read_bool(dev,

				"snps,usb2-lpm-disable");

	device_property_read_u8(dev, "snps,rx-thr-num-pkt-prd",

				&rx_thr_num_pkt_prd);

	device_property_read_u8(dev, "snps,rx-max-burst-prd",

drivers/usb/dwc3/core.h

+2 −0
Original line number Diff line number Diff line
@@ -982,6 +982,7 @@ struct dwc3_scratchpad_array { 
 * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround

 * @three_stage_setup: set if we perform a three phase setup

 * @usb3_lpm_capable: set if hadrware supports Link Power Management

 * @usb2_lpm_disable: set to disable usb2 lpm

 * @disable_scramble_quirk: set if we enable the disable scramble quirk

 * @u2exit_lfps_quirk: set if we enable u2exit lfps quirk

 * @u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
@@ -1159,6 +1160,7 @@ struct dwc3 { 
	unsigned		setup_packet_pending:1;

	unsigned		three_stage_setup:1;

	unsigned		usb3_lpm_capable:1;

	unsigned		usb2_lpm_disable:1;



	unsigned		disable_scramble_quirk:1;

	unsigned		u2exit_lfps_quirk:1;

drivers/usb/dwc3/host.c

+4 −1
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ out: 


int dwc3_host_init(struct dwc3 *dwc)

{

	struct property_entry	props[3];

	struct property_entry	props[4];

	struct platform_device	*xhci;

	int			ret, irq;

	struct resource		*res;
@@ -93,6 +93,9 @@ int dwc3_host_init(struct dwc3 *dwc) 
	if (dwc->usb3_lpm_capable)

		props[prop_idx++].name = "usb3-lpm-capable";



	if (dwc->usb2_lpm_disable)

		props[prop_idx++].name = "usb2-lpm-disable";



	/**

	 * WORKAROUND: dwc3 revisions <=3.00a have a limitation

	 * where Port Disable command doesn't work.

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