usb: ehci-mx6: Add DM clock support

Add support for using DM clock framework to enable and disable all the
necessary clock for the USB controller.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Ye Li <ye.li@nxp.com>
Cc: uboot-imx <uboot-imx@nxp.com>

diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c
index 7b538b6..04b072e 100644 (file)
--- a/drivers/usb/host/ehci-mx6.c
+++ b/drivers/usb/host/ehci-mx6.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <log.h>
 #include <usb.h>
 #include <errno.h>
@@ -347,9 +348,6 @@ int ehci_mx6_common_init(struct usb_ehci *ehci, int index)
 {
        int ret;
 
-       enable_usboh3_clk(1);
-       mdelay(1);
-
        /* Do board specific initialization */
        ret = board_ehci_hcd_init(index);
        if (ret)
@@ -391,6 +389,9 @@ int ehci_hcd_init(int index, enum usb_init_type init,
                }
        }
 
+       enable_usboh3_clk(1);
+       mdelay(1);
+
        ret = ehci_mx6_common_init(ehci, index);
        if (ret)
                return ret;
@@ -428,6 +429,7 @@ struct ehci_mx6_priv_data {
        struct ehci_ctrl ctrl;
        struct usb_ehci *ehci;
        struct udevice *vbus_supply;
+       struct clk clk;
        enum usb_init_type init_type;
        int portnr;
 };
@@ -606,6 +608,20 @@ static int ehci_usb_probe(struct udevice *dev)
        priv->portnr = dev_seq(dev);
        priv->init_type = type;
 
+#if CONFIG_IS_ENABLED(CLK)
+       ret = clk_get_by_index(dev, 0, &priv->clk);
+       if (ret < 0)
+               return ret;
+
+       ret = clk_enable(&priv->clk);
+       if (ret)
+               return ret;
+#else
+       /* Compatibility with DM_USB and !CLK */
+       enable_usboh3_clk(1);
+       mdelay(1);
+#endif
+
 #if CONFIG_IS_ENABLED(DM_REGULATOR)
        ret = device_get_supply_regulator(dev, "vbus-supply",
                                          &priv->vbus_supply);
@@ -614,7 +630,7 @@ static int ehci_usb_probe(struct udevice *dev)
 #endif
        ret = ehci_mx6_common_init(ehci, priv->portnr);
        if (ret)
-               return ret;
+               goto err_clk;
 
 #if CONFIG_IS_ENABLED(DM_REGULATOR)
        if (priv->vbus_supply) {
@@ -623,7 +639,7 @@ static int ehci_usb_probe(struct udevice *dev)
                                           false : true);
                if (ret && ret != -ENOSYS) {
                        printf("Error enabling VBUS supply (ret=%i)\n", ret);
-                       return ret;
+                       goto err_clk;
                }
        }
 #endif
@@ -651,6 +667,13 @@ err_regulator:
        if (priv->vbus_supply)
                regulator_set_enable(priv->vbus_supply, false);
 #endif
+err_clk:
+#if CONFIG_IS_ENABLED(CLK)
+       clk_disable(&priv->clk);
+#else
+       /* Compatibility with DM_USB and !CLK */
+       enable_usboh3_clk(0);
+#endif
        return ret;
 }
 
@@ -665,6 +688,10 @@ int ehci_usb_remove(struct udevice *dev)
                regulator_set_enable(priv->vbus_supply, false);
 #endif
 
+#if CONFIG_IS_ENABLED(CLK)
+       clk_disable(&priv->clk);
+#endif
+
        return 0;
 }