Some implementations need this limitation to work correctly.
Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
---
drivers/usb/chipidea/ci13xxx_pci.c | 3 +++
drivers/usb/chipidea/host.c | 3 +++
include/linux/usb/chipidea.h | 1 +
3 files changed, 7 insertions(+)
diff --git a/drivers/usb/chipidea/ci13xxx_pci.c b/drivers/usb/chipidea/ci13xxx_pci.c
index 79e9864..a2201b5 100644
--- a/drivers/usb/chipidea/ci13xxx_pci.c
+++ b/drivers/usb/chipidea/ci13xxx_pci.c
@@ -76,6 +76,9 @@ static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
driver.capoffset = 0;
+ if (pdev->device == 0x0829)
+ driver.power_budget_limit = 200;
+
/* private SRAM */
if (pci_resource_len(pdev, 1)) {
res[2].start = pci_resource_start(pdev, 1);
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 126753c..9ea2a31 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -117,6 +117,9 @@ static int host_start(struct ci13xxx *ci)
hcd->regs = ci->hw_bank.abs;
hcd->has_tt = 1;
+ if (ci->udc_driver->power_budget_limit)
+ hcd->power_budget = ci->udc_driver->power_budget_limit;
+
ehci = hcd_to_ehci(hcd);
ehci->caps = ci->hw_bank.cap;
ehci->regs = ci->hw_bank.cap +
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 86273ce..8d3d23e 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -10,6 +10,7 @@ struct ci13xxx_udc_driver {
const char *name;
/* offset of the capability registers */
uintptr_t capoffset;
+ unsigned power_budget_limit;
unsigned long flags;
#define CI13XXX_REGS_SHARED BIT(0)
#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
--
1.7.10
--
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