linux-kernel - [RFC PATCH 1/3] dt-bindings: usb: mtk-xhci: add compatible for mt8195

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Date:   Wed, 3 Feb 2021 14:31:57 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Ikjoon Jang <ikjn@...omium.org>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>
Subject: [RFC PATCH 1/3] dt-bindings: usb: mtk-xhci: add compatible for mt8195

There are 4 USB controllers on MT8195, the controllers (IP1~IP3,
exclude IP0) have a wrong default SOF/ITP interval which is
calculated from the frame counter clock 24Mhz by default, but
in fact, the frame counter clock is 48Mhz, so we should set
the accurate interval according to 48Mhz. Here add a new compatible
for MT8195, it's also supported in driver. But the first controller
(IP0) has no such issue, we prefer to use generic compatible,
e.g. mt8192's compatible.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
 Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
index 42d8814f903a..02cba4212f7d 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
@@ -16,6 +16,7 @@ Required properties:
 	"mediatek,mtk-xhci" compatible string, you need SoC specific ones in
 	addition, one of:
 	- "mediatek,mt8173-xhci"
+	- "mediatek,mt8195-xhci"
  - reg : specifies physical base address and size of the registers
  - reg-names: should be "mac" for xHCI MAC and "ippc" for IP port control
  - interrupts : interrupt used by the controller
-- 
2.18.0