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usb: ehci-orion: add optional PHY support 

This commit extends the ehci-orion so that it can optionally be passed
a reference to a PHY through the Device Tree. It will be useful for
the Armada 375 SoCs. If no PHY is provided then the behavior of the
driver is unchanged.

[Thomas: use devm_phy_optional_get() so that we handle -EPROBE_DEFER
properly. Also call phy_power_off() when needed, and rename goto
labels.]

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gregory CLEMENT 2014-05-15 12:17:29 +02:00 committed by Greg Kroah-Hartman
parent ac0696629d
commit d445913ce0
1 changed files with 28 additions and 0 deletions
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28
drivers/usb/host/ehci-orion.c
View File

@ -15,6 +15,7 @@
#include <linux/clk.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/usb.h>
@ -46,6 +47,7 @@
struct orion_ehci_hcd {
struct clk *clk;
struct phy *phy;
};
static const char hcd_name[] = "ehci-orion";
@ -221,6 +223,20 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
if (!IS_ERR(priv->clk))
clk_prepare_enable(priv->clk);
priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
if (IS_ERR(priv->phy)) {
err = PTR_ERR(priv->phy);
goto err_phy_get;
} else {
err = phy_init(priv->phy);
if (err)
goto err_phy_init;
err = phy_power_on(priv->phy);
if (err)
goto err_phy_power_on;
}
/*
* (Re-)program MBUS remapping windows if we are asked to.
*/
@ -256,6 +272,13 @@ static int ehci_orion_drv_probe(struct platform_device *pdev)
return 0;
err_add_hcd:
if (!IS_ERR(priv->phy))
phy_power_off(priv->phy);
err_phy_power_on:
if (!IS_ERR(priv->phy))
phy_exit(priv->phy);
err_phy_init:
err_phy_get:
if (!IS_ERR(priv->clk))
clk_disable_unprepare(priv->clk);
usb_put_hcd(hcd);
@ -273,6 +296,11 @@ static int ehci_orion_drv_remove(struct platform_device *pdev)
usb_remove_hcd(hcd);
if (!IS_ERR(priv->phy)) {
phy_power_off(priv->phy);
phy_exit(priv->phy);
}
if (!IS_ERR(priv->clk))
clk_disable_unprepare(priv->clk);