From: Vignesh Raghavendra <vigneshr@ti.com>
To: Pratyush Yadav <p.yadav@ti.com>, 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>
Subject: Re: [PATCH v2 2/3] arm64: dts: ti: am654-base-board: Enable 8D-8D-8D mode on OSPI
Date: Fri, 5 Mar 2021 21:42:28 +0530 [thread overview]
Message-ID: <df1610bc-fbcc-9ebb-e8d2-24f2d69aba00@ti.com> (raw)
In-Reply-To: <20210305153926.3479-3-p.yadav@ti.com>
On 3/5/21 9:09 PM, Pratyush Yadav wrote:
> 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>
> ---
>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
> Notes:
> No changes in v2.
>
> arch/arm64/boot/dts/ti/k3-am654-base-board.dts | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
> index fe3043943906..9e87fb313a54 100644
> --- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
> @@ -483,9 +483,9 @@ &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>;
>
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next prev parent reply other threads:[~2021-03-05 16:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 15:39 [PATCH v2 0/3] Enable 8D-8D-8D mode on J721E, J7200, AM654 Pratyush Yadav
2021-03-05 15:39 ` [PATCH v2 1/3] arm64: dts: ti: k3-j721e-som-p0: Enable 8D-8D-8D mode on OSPI Pratyush Yadav
2021-03-05 16:12 ` Vignesh Raghavendra
2021-03-05 15:39 ` [PATCH v2 2/3] arm64: dts: ti: am654-base-board: " Pratyush Yadav
2021-03-05 16:12 ` Vignesh Raghavendra [this message]
2021-03-05 15:39 ` [PATCH v2 3/3] arm64: dts: ti: k3-j7200-som-p0: Add nodes for OSPI0 Pratyush Yadav
2021-03-05 16:13 ` Vignesh Raghavendra
2021-03-11 13:22 ` Nishanth Menon
2021-03-11 13:41 ` Pratyush Yadav
2021-03-11 13:49 ` Nishanth Menon
2021-03-09 17:01 ` Nishanth Menon
2021-03-11 14:17 ` [PATCH v2 0/3] Enable 8D-8D-8D mode on J721E, J7200, AM654 Nishanth Menon
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