From: Pratyush Yadav <p.yadav@ti.com>
To: Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: Pratyush Yadav <p.yadav@ti.com>, Vignesh Raghavendra <vigneshr@ti.com>
Subject: [PATCH 1/3] arm64: dts: ti: k3-j721e-som-p0: Enable 8D-8D-8D mode on OSPI
Date: Tue, 2 Mar 2021 01:28:48 +0530 [thread overview]
Message-ID: <20210301195850.31868-2-p.yadav@ti.com> (raw)
In-Reply-To: <20210301195850.31868-1-p.yadav@ti.com>
Set the Tx bus width to 8 so 8D-8D-8D mode can be selected. Change the
frequency to 25 MHz. This is the frequency that the flash has been
successfully tested with in Octal DTR mode. The total performance should
still increase since 8D-8D-8D mode should be at least twice as fast as
1S-1S-8S mode.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---
arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
index 57720e6a04c5..2fee2906183d 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi
@@ -174,9 +174,9 @@ &ospi0 {
flash@0{
compatible = "jedec,spi-nor";
reg = <0x0>;
- spi-tx-bus-width = <1>;
+ spi-tx-bus-width = <8>;
spi-rx-bus-width = <8>;
- spi-max-frequency = <40000000>;
+ spi-max-frequency = <25000000>;
cdns,tshsl-ns = <60>;
cdns,tsd2d-ns = <60>;
cdns,tchsh-ns = <60>;
--
2.30.0
next prev parent reply other threads:[~2021-03-02 5:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 19:58 [PATCH 0/3] Enable 8D-8D-8D mode on J721E, J7200, AM654 Pratyush Yadav
2021-03-01 19:58 ` Pratyush Yadav [this message]
2021-03-01 19:58 ` [PATCH 2/3] arm64: dts: ti: am654-base-board: Enable 8D-8D-8D mode on OSPI Pratyush Yadav
2021-03-01 19:58 ` [PATCH 3/3] arm64: dts: ti: k3-j7200-som-p0: Add nodes for OSPI0 Pratyush Yadav
2021-03-02 7:40 ` Vignesh Raghavendra
2021-03-02 12:05 ` Pratyush Yadav
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