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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: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Thinh Nguyen 2018-11-07 18:10:42 -08:00 committed by Felipe Balbi
parent 5455e15607
commit 022a0208c0
3 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/dwc3/core.c
View File

@ -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",

2
drivers/usb/dwc3/core.h
View File

@ -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;

5
drivers/usb/dwc3/host.c
View File

@ -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.