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Fri, 5 Mar 2021 10:12:06 -0600 Received: from DLEE100.ent.ti.com (157.170.170.30) by DLEE101.ent.ti.com (157.170.170.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Fri, 5 Mar 2021 10:12:06 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Fri, 5 Mar 2021 10:12:06 -0600 Received: from [10.250.234.120] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 125GC34S094599; Fri, 5 Mar 2021 10:12:04 -0600 Subject: Re: [PATCH v2 1/3] arm64: dts: ti: k3-j721e-som-p0: Enable 8D-8D-8D mode on OSPI To: Pratyush Yadav , Nishanth Menon , Tero Kristo , Rob Herring , , , References: <20210305153926.3479-1-p.yadav@ti.com> <20210305153926.3479-2-p.yadav@ti.com> From: Vignesh Raghavendra Message-ID: Date: Fri, 5 Mar 2021 21:42:03 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210305153926.3479-2-p.yadav@ti.com> Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210305_161219_884248_704F9FFE X-CRM114-Status: GOOD ( 17.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 > --- > Reviewed-by: Vignesh Raghavendra > Notes: > No changes in v2. > > 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>; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel