linux-kernel - [PATCH v4 6/6] arm64: dts: k3-j721e-proc-board: Add wait time for sampling Type-C DIR line

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Date:   Mon, 29 Jun 2020 15:52:54 +0300
From:   Roger Quadros <rogerq@...com>
To:     <t-kristo@...com>
CC:     <robh@...nel.org>, <kishon@...com>, <nm@...com>, <vigneshr@...com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Roger Quadros <rogerq@...com>, Sekhar Nori <nsekhar@...com>
Subject: [PATCH v4 6/6] arm64: dts: k3-j721e-proc-board: Add wait time for sampling Type-C DIR line

The Type-C compainon chip on the board needs ~133ms (tCCB_DEFAULT)
to debounce the CC lines in order to detect attach and plug orientation
and reflect the correct DIR status. [1]

On the EVM however we need to wait upto 700ms before sampling the
Type-C DIR line else we can get incorrect direction state.

[1] http://www.ti.com/lit/ds/symlink/tusb321.pdf

Signed-off-by: Roger Quadros <rogerq@...com>
Signed-off-by: Sekhar Nori <nsekhar@...com>
---
 arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index 3294b96ebba8..6307fe5ccb06 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -350,6 +350,7 @@
 
 &serdes_wiz3 {
 	typec-dir-gpios = <&main_gpio1 3 GPIO_ACTIVE_HIGH>;
+	typec-dir-debounce-ms = <700>;	/* TUSB321, tCCB_DEFAULT 133 ms */
 };
 
 &serdes3 {
-- 
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