linux-kernel - [PATCH 5.10 114/125] ARM: dts: tacoma: Add phase corrections for eMMC

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Date:   Thu, 22 Jul 2021 18:31:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Andrew Jeffery <andrew@...id.au>,
        Joel Stanley <joel@....id.au>
Subject: [PATCH 5.10 114/125] ARM: dts: tacoma: Add phase corrections for eMMC

From: Andrew Jeffery <andrew@...id.au>

commit 2d6608b57c50c54c3e46649110e8ea5a40959c30 upstream.

The degree values were reversed out from the magic tap values of 7 (in)
and 15 + inversion (out) initially suggested by Aspeed.

With the patch tacoma survives several gigabytes of reads and writes
using dd while without it locks up randomly during the boot process.

Signed-off-by: Andrew Jeffery <andrew@...id.au>
Link: https://lore.kernel.org/r/20210625061017.1149942-1-andrew@aj.id.au
Fixes: 2fc88f92359d ("mmc: sdhci-of-aspeed: Expose clock phase controls")
Fixes: 961216c135a8 ("ARM: dts: aspeed: Add Rainier system")
Signed-off-by: Joel Stanley <joel@....id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts
@@ -177,6 +177,7 @@
 
 &emmc {
 	status = "okay";
+	clk-phase-mmc-hs200 = <36>, <270>;
 };
 
 &fsim0 {