linux-kernel - [PATCH 1/3] arm64: dts: ti: k3-j7200-main: Add Itap Delay Value For DDR52 speed mode

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Message-ID: <20231201082045.790478-2-b-kapoor@ti.com>
Date:   Fri, 1 Dec 2023 13:50:43 +0530
From:   Bhavya Kapoor <b-kapoor@...com>
To:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <conor+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <robh+dt@...nel.org>, <kristo@...nel.org>, <vigneshr@...com>,
        <nm@...com>, <b-kapoor@...com>
Subject: [PATCH 1/3] arm64: dts: ti: k3-j7200-main: Add Itap Delay Value For DDR52 speed mode

DDR52 speed mode is enabled for eMMC in J7200 but its Itap Delay Value
is not present in the device tree. Thus, add Itap Delay Value for eMMC
High Speed DDR which is DDR52 speed mode for J7200 SoC according to
datasheet for J7200.

[+] Refer to : section 7.9.5.16.1 MMCSD0 - eMMC Interface,  in
	J7200 datasheet
- https://www.ti.com/lit/ds/symlink/dra821u-q1.pdf

Signed-off-by: Bhavya Kapoor <b-kapoor@...com>
---
 arch/arm64/boot/dts/ti/k3-j7200-main.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
index 264913f83287..39ce465c8e00 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
@@ -647,6 +647,7 @@ main_sdhci0: mmc@...0000 {
 		ti,otap-del-sel-hs400 = <0x5>;
 		ti,itap-del-sel-legacy = <0x10>;
 		ti,itap-del-sel-mmc-hs = <0xa>;
+		ti,itap-del-sel-ddr52 = <0x3>;
 		ti,strobe-sel = <0x77>;
 		ti,clkbuf-sel = <0x7>;
 		ti,trm-icp = <0x8>;
-- 
2.34.1