usb: mtu3: add helper to power on/down device

Add helper to power on/down device ports and ip, it will be
used when support device suspend/resume

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-12-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 6d23acb..648e970 100644 (file)
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -141,6 +141,28 @@ static void mtu3_device_disable(struct mtu3 *mtu)
        mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
 }
 
+static void mtu3_dev_power_on(struct mtu3 *mtu)
+{
+       void __iomem *ibase = mtu->ippc_base;
+
+       mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+       if (mtu->is_u3_ip)
+               mtu3_clrbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+       mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+}
+
+static void mtu3_dev_power_down(struct mtu3 *mtu)
+{
+       void __iomem *ibase = mtu->ippc_base;
+
+       if (mtu->is_u3_ip)
+               mtu3_setbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+       mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+       mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+}
+
 /* reset U3D's device module. */
 static void mtu3_device_reset(struct mtu3 *mtu)
 {
@@ -333,12 +355,7 @@ void mtu3_start(struct mtu3 *mtu)
        dev_dbg(mtu->dev, "%s devctl 0x%x\n", __func__,
                mtu3_readl(mbase, U3D_DEVICE_CONTROL));
 
-       mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
-       if (mtu->is_u3_ip)
-               mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
-
-       mtu3_clrbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
-
+       mtu3_dev_power_on(mtu);
        mtu3_csr_init(mtu);
        mtu3_set_speed(mtu, mtu->speed);
 
@@ -360,12 +377,7 @@ void mtu3_stop(struct mtu3 *mtu)
                mtu3_dev_on_off(mtu, 0);
 
        mtu->is_active = 0;
-
-       if (mtu->is_u3_ip)
-               mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
-
-       mtu3_setbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
-       mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+       mtu3_dev_power_down(mtu);
 }
 
 /* for non-ep0 */