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Mon, 10 May 2021 07:39:58 +0000 From: Avri Altman To: Ulf Hansson , "linux-mmc@vger.kernel.org" , Adrian Hunter CC: Linus Walleij , Wolfram Sang , Shawn Lin , Masami Hiramatsu , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH 0/2] mmc: core: Implement support for cache ctrl for SD cards Thread-Topic: [PATCH 0/2] mmc: core: Implement support for cache ctrl for SD cards Thread-Index: AQHXQohNKxu4RT1OFEWqz8n335r4pKrcWPlg Date: Mon, 10 May 2021 07:39:57 +0000 Message-ID: References: <20210506145829.198823-1-ulf.hansson@linaro.org> In-Reply-To: <20210506145829.198823-1-ulf.hansson@linaro.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: linaro.org; dkim=none (message not signed) header.d=none;linaro.org; dmarc=none action=none header.from=wdc.com; x-originating-ip: [212.25.79.133] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e1202a52-84c2-4733-e497-08d91386cfab x-ms-traffictypediagnostic: DM6PR04MB5945: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:8882; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR04MB6575.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e1202a52-84c2-4733-e497-08d91386cfab X-MS-Exchange-CrossTenant-originalarrivaltime: 10 May 2021 07:39:57.9279 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: OKbHDYyNZgs7We3S+wH3CeiClVLMrmCgMGp7gnFJXmqvTM5YUkTtjmp8f/mhQYTKzRMIVVpst2s2tzku8ijAvA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR04MB5945 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > In the SD spec v6.x the SD function extension registers for performance > enhancements were introduced. As a part of this an optional internal cach= e > on > the SD card can be used to improve performance. Just to verify that you are aware of that: In addition to the extension Registers that were defined in the physical co= re spec, there was a separate document that was released that suggest a common OS AP= I's to those registers. It is called "SD specification part A5, SD Extensions API specification". Thanks, Avri