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Code Issues Releases Wiki Activity

usb: host: tegra: Resetting PORT0 based on information received via DT. 

Tegra USB host driver is using port instance number,
to handle some of the hardware issues on SOC e.g. reset PORT0
twice etc. As instance number based handling looks ugly,
making use of information passed through DT for achieving this.

Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Venu Byravarasu 2012-12-13 20:59:08 +00:00 committed by Stephen Warren
parent b4e074788a
commit 585355c5b5
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/host/ehci-tegra.c
View File

@ -43,6 +43,7 @@ struct tegra_ehci_hcd {
struct usb_phy *transceiver;
int host_resumed;
int port_resuming;
bool needs_double_reset;
enum tegra_usb_phy_port_speed port_speed;
};
@ -184,7 +185,7 @@ static int tegra_ehci_hub_control(
}
/* For USB1 port we need to issue Port Reset twice internally */
if (tegra->phy->instance == 0 &&
if (tegra->needs_double_reset &&
(typeReq == SetPortFeature && wValue == USB_PORT_FEAT_RESET)) {
spin_unlock_irqrestore(&ehci->lock, flags);
return tegra_ehci_internal_port_reset(ehci, status_reg);
@ -666,6 +667,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
clk_prepare_enable(tegra->emc_clk);
clk_set_rate(tegra->emc_clk, 400000000);
tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node,
"nvidia,needs-double-reset");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get I/O memory\n");