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authorArun Ramamurthy <arunrama@broadcom.com>2015-01-20 03:05:30 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-25 16:04:21 +0300
commit85cd690d7e08159e8e4d737317a5e8a96140d687 (patch)
tree7003ef0210b95b174382bafc6205fb12d121616f /drivers/usb/host/ohci-platform.c
parent6d2a5663297a0489e7ade3303bba37e544da66e5 (diff)
downloadlinux-85cd690d7e08159e8e4d737317a5e8a96140d687.tar.xz
usb: ohci-platform: add support for multiple phys per controller
Added support for cases where one controller is connected to multiple phys Signed-off-by: Arun Ramamurthy <arunrama@broadcom.com> Reviewed-by: Ray Jui <rjui@broadcom.com> Reviewed-by: Scott Branden <sbranden@broadcom.com> Tested-by: Scott Branden <sbranden@broadcom.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ohci-platform.c')
-rw-r--r--drivers/usb/host/ohci-platform.c82
1 files changed, 60 insertions, 22 deletions
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 9c06b0197eb9..185ceee52d47 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -38,7 +38,8 @@
struct ohci_platform_priv {
struct clk *clks[OHCI_MAX_CLKS];
struct reset_control *rst;
- struct phy *phy;
+ struct phy **phys;
+ int num_phys;
};
static const char hcd_name[] = "ohci-platform";
@@ -47,7 +48,7 @@ static int ohci_platform_power_on(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
- int clk, ret;
+ int clk, ret, phy_num;
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
@@ -55,20 +56,28 @@ static int ohci_platform_power_on(struct platform_device *dev)
goto err_disable_clks;
}
- if (priv->phy) {
- ret = phy_init(priv->phy);
- if (ret)
- goto err_disable_clks;
-
- ret = phy_power_on(priv->phy);
- if (ret)
- goto err_exit_phy;
+ for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
+ if (priv->phys[phy_num]) {
+ ret = phy_init(priv->phys[phy_num]);
+ if (ret)
+ goto err_exit_phy;
+ ret = phy_power_on(priv->phys[phy_num]);
+ if (ret) {
+ phy_exit(priv->phys[phy_num]);
+ goto err_exit_phy;
+ }
+ }
}
return 0;
err_exit_phy:
- phy_exit(priv->phy);
+ while (--phy_num >= 0) {
+ if (priv->phys[phy_num]) {
+ phy_power_off(priv->phys[phy_num]);
+ phy_exit(priv->phys[phy_num]);
+ }
+ }
err_disable_clks:
while (--clk >= 0)
clk_disable_unprepare(priv->clks[clk]);
@@ -80,11 +89,13 @@ static void ohci_platform_power_off(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
- int clk;
+ int clk, phy_num;
- if (priv->phy) {
- phy_power_off(priv->phy);
- phy_exit(priv->phy);
+ for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
+ if (priv->phys[phy_num]) {
+ phy_power_off(priv->phys[phy_num]);
+ phy_exit(priv->phys[phy_num]);
+ }
}
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
@@ -112,7 +123,8 @@ static int ohci_platform_probe(struct platform_device *dev)
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ohci_platform_priv *priv;
struct ohci_hcd *ohci;
- int err, irq, clk = 0;
+ const char *phy_name;
+ int err, irq, phy_num, clk = 0;
if (usb_disabled())
return -ENODEV;
@@ -160,12 +172,38 @@ static int ohci_platform_probe(struct platform_device *dev)
of_property_read_u32(dev->dev.of_node, "num-ports",
&ohci->num_ports);
- priv->phy = devm_phy_get(&dev->dev, "usb");
- if (IS_ERR(priv->phy)) {
- err = PTR_ERR(priv->phy);
- if (err == -EPROBE_DEFER)
- goto err_put_hcd;
- priv->phy = NULL;
+ priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
+ "phys", "#phy-cells");
+ priv->num_phys = priv->num_phys > 0 ? priv->num_phys : 1;
+
+ priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
+ sizeof(struct phy *), GFP_KERNEL);
+ if (!priv->phys)
+ return -ENOMEM;
+
+ for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
+ err = of_property_read_string_index(
+ dev->dev.of_node,
+ "phy-names", phy_num,
+ &phy_name);
+
+ if (err < 0) {
+ if (priv->num_phys > 1) {
+ dev_err(&dev->dev, "phy-names not provided");
+ goto err_put_hcd;
+ } else
+ phy_name = "usb";
+ }
+
+ priv->phys[phy_num] = devm_phy_get(&dev->dev,
+ phy_name);
+ if (IS_ERR(priv->phys[phy_num])) {
+ err = PTR_ERR(priv->phys[phy_num]);
+ if ((priv->num_phys > 1) ||
+ (err == -EPROBE_DEFER))
+ goto err_put_hcd;
+ priv->phys[phy_num] = NULL;
+ }
}
for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {