Add support ip-sleep wakeup for MT8183, it's similar to MT8173,
and it's also a specific one, but not following IPM rule.
Due to the index 2 already used by many DTS, it's better to keep
it unchanged for backward compatibility, treat specific ones without
following IPM rule as revision 1.x, meanwhile reserve 3~10 for
later revision that follows the IPM rule.

Signed-off-by: Chunfeng Yun <chunfeng....@mediatek.com>
---
v2:
   1. fix typo suggested by Sergei
   2. fix build warning - Woverflow
   3. modify revision format
---
 drivers/usb/host/xhci-mtk.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 09f2ddbfe8b9..ef2c74281ab4 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -57,12 +57,19 @@
 #define CTRL_U2_FORCE_PLL_STB  BIT(28)
 
 /* usb remote wakeup registers in syscon */
+
 /* mt8173 etc */
 #define PERI_WK_CTRL1  0x4
 #define WC1_IS_C(x)    (((x) & 0xf) << 26)  /* cycle debounce */
 #define WC1_IS_EN      BIT(25)
 #define WC1_IS_P       BIT(6)  /* polarity for ip sleep */
 
+/* mt8183 */
+#define PERI_WK_CTRL0  0x0
+#define WC0_IS_C(x)    ((u32)(((x) & 0xf) << 28))  /* cycle debounce */
+#define WC0_IS_P       BIT(12) /* polarity */
+#define WC0_IS_EN      BIT(6)
+
 /* mt2712 etc */
 #define PERI_SSUSB_SPM_CTRL    0x0
 #define SSC_IP_SLEEP_EN        BIT(4)
@@ -71,6 +78,7 @@
 enum ssusb_uwk_vers {
        SSUSB_UWK_V1 = 1,
        SSUSB_UWK_V2,
+       SSUSB_UWK_V1_1 = 101,   /* specific revision 1.01 */
 };
 
 static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
@@ -300,6 +308,11 @@ static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk 
*mtk, bool enable)
                msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P;
                val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0;
                break;
+       case SSUSB_UWK_V1_1:
+               reg = mtk->uwk_reg_base + PERI_WK_CTRL0;
+               msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P;
+               val = enable ? (WC0_IS_EN | WC0_IS_C(0x8)) : 0;
+               break;
        case SSUSB_UWK_V2:
                reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
                msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;
-- 
2.18.0

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