Commit 93045121 authored by Stephen Warren's avatar Stephen Warren

usb: host: tegra: don't touch EMC clock

Clock "emc" is for the External Memory Controller. The USB driver has no
business touching this clock directly. Remove the code that does so.
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent bbdabdb6
......@@ -44,7 +44,6 @@ struct tegra_ehci_hcd {
struct ehci_hcd *ehci;
struct tegra_usb_phy *phy;
struct clk *clk;
struct clk *emc_clk;
struct usb_phy *transceiver;
int host_resumed;
int port_resuming;
......@@ -56,7 +55,6 @@ static void tegra_ehci_power_up(struct usb_hcd *hcd)
{
struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
clk_prepare_enable(tegra->emc_clk);
clk_prepare_enable(tegra->clk);
usb_phy_set_suspend(&tegra->phy->u_phy, 0);
tegra->host_resumed = 1;
......@@ -69,7 +67,6 @@ static void tegra_ehci_power_down(struct usb_hcd *hcd)
tegra->host_resumed = 0;
usb_phy_set_suspend(&tegra->phy->u_phy, 1);
clk_disable_unprepare(tegra->clk);
clk_disable_unprepare(tegra->emc_clk);
}
static int tegra_ehci_internal_port_reset(
......@@ -694,16 +691,6 @@ static int tegra_ehci_probe(struct platform_device *pdev)
if (err)
goto fail_clk;
tegra->emc_clk = devm_clk_get(&pdev->dev, "emc");
if (IS_ERR(tegra->emc_clk)) {
dev_err(&pdev->dev, "Can't get emc clock\n");
err = PTR_ERR(tegra->emc_clk);
goto fail_emc_clk;
}
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");
......@@ -813,8 +800,6 @@ static int tegra_ehci_probe(struct platform_device *pdev)
#endif
usb_phy_shutdown(&tegra->phy->u_phy);
fail_io:
clk_disable_unprepare(tegra->emc_clk);
fail_emc_clk:
clk_disable_unprepare(tegra->clk);
fail_clk:
usb_put_hcd(hcd);
......@@ -842,8 +827,6 @@ static int tegra_ehci_remove(struct platform_device *pdev)
clk_disable_unprepare(tegra->clk);
clk_disable_unprepare(tegra->emc_clk);
return 0;
}
......
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