linux-kernel - [PATCH 5/5] arm64: dts: k3-j721e-proc-board: Add wait time for sampling Type-C DIR line

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Message-ID: <20200108111830.8482-6-rogerq@ti.com>
Date:   Wed, 8 Jan 2020 13:18:30 +0200
From:   Roger Quadros <rogerq@...com>
To:     <t-kristo@...com>
CC:     <nm@...com>, <kishon@...com>, <nsekhar@...com>, <vigneshr@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Roger Quadros <rogerq@...com>
Subject: [PATCH 5/5] 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]

Let's wait for 300ms before sampling the Type-C DIR line.

[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 4d180887342c..1dc6fdc86bc5 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
@@ -272,6 +272,7 @@
 
 &serdes_wiz3 {
 	typec-dir-gpios = <&main_gpio1 3 GPIO_ACTIVE_HIGH>;
+	typec-dir-debounce-ms = <300>;	/* TUSB321, tCCB_DEFAULT 133 ms */
 };
 
 &serdes3 {
-- 
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