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authorVenu Byravarasu <vbyravarasu@nvidia.com>2012-12-13 20:59:08 +0000
committerStephen Warren <swarren@nvidia.com>2013-01-28 11:20:05 -0700
commit585355c5b54e2ecdcd6463aec264d907bc416727 (patch)
tree0075632f3eb22e27b59902ff4153d96ae4f21882 /drivers/usb
parentb4e074788a4a461431e25906358c6e62cb8daf9d (diff)
downloadop-kernel-dev-585355c5b54e2ecdcd6463aec264d907bc416727.zip
op-kernel-dev-585355c5b54e2ecdcd6463aec264d907bc416727.tar.gz
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/ehci-tegra.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index acf1755..55a9cde 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -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");
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