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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR21MB1323.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4afb8563-902f-42fa-472f-08d9f7ef53dd X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Feb 2022 23:42:32.4591 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: xRX5WigPLLG/wdY4cL47C42fb2+GS2Hb/aduFnTzmSgeBylXyfiFRdznW9QZj916mXf5jBRnvvZw6arqAO1VcQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR21MB1336 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday, February 15, 2022 8:39 AM, Bjorn Andersson >=20 > On Mon 14 Feb 19:04 CST 2022, Jarrett Schultz wrote: >=20 > > Jarrett Schultz wrote: > > > From: Jarrett Schultz > > > > > > Rob Herring wrote: > > > > From: Rob Herring > > > > > > > > On Tue, Dec 21, 2021 at 10:28:23AM -0800, Jarrett Schultz wrote: > > > > > From: Jarrett Schultz > > > > > > > > > > +title: Surface Extensible Bootloader for Microsoft Surface Duo > > > > > + > > > > > +maintainers: > > > > > + - Jarrett Schultz > > > > > + > > > > > +description: | > > > > > + Defined to expose information that is used during production > > > > > +when > > > > > + device is in manufacturing mode. Some of the information > > > > > +included > > > > > + in this imem section is - > > > > > > > > If this is onchip sram, we have a binding for that. That's not an M= FD. > > > > > > I now have this driver working with nvmem, but I could not find the > > > binding that you are talking about here. Could you point me to the > binding? > > > > > > Thanks, > > > Jarrett > > > > > > > Rob, > > > > I followed up with my team members who have let me know that this lies > > in DDR rather than SRAM. Could you please point me to the correct > > binding to use? > > >=20 > It might be DDR, but it's on-chip and the memory region that you describe= is > a region within "imem" - something used for various purposes by Qualcomm, > presumably also in your device. Unfortunately we haven't specified a bind= ing > for "imem", only some of its regions. >=20 > Perhaps it would be appropriate to express the entire imem as nvmem, in > addition to the region-specific logic, if that suits you. >=20 > Regards, > Bjorn Bjorn et al., This xbl driver was meant to be something simple and the intent was to merg= e it into the tree with an existing structure. Your suggestion makes sense,= and I believe that it could be implemented as a separate patch after this = patch with the initial xbl driver has been accepted and merged. Please let me know what you think, Jarrett Schultz >=20 > > Thanks, > > Jarrett > > > > > > > > > > > + * board_id > > > > > + * battery_present > > > > > + * hw_init_retries > > > > > + * is_customer_mode > > > > > + * is_act_mode > > > > > + * pmic_reset_reason > > > > > + * touch_fw_version > > > > > + * ocp_error_location > > > > > > > > nvmem binding doesn't work for describing these fields? > > > > > > > > > + See sysfs documentation for more information. > > > > > > > > sysfs? Not relevant to the binding. > > > > > > > > > + > > > > > +properties: > > > > > + compatible: > > > > > + const: simple-mfd > > > > > + > > > > > + reg: > > > > > + maxItems: 1 > > > > > + > > > > > +additionalProperties: false > > > > > + > > > > > +required: > > > > > + - compatible > > > > > + - reg > > > > > + - ranges > > > > > + - address-cells > > > > > + - size-cells > > > > > + > > > > > +examples: > > > > > + - | > > > > > + / { > > > > > + compatible =3D "foo"; > > > > > + model =3D "foo"; > > > > > > > > No need to make this the root node with a fake compatible. > > > > > > > > > + #address-cells =3D <2>; > > > > > + #size-cells =3D <2>; > > > > > + > > > > > + imem@146bf000 { > > > > > + compatible =3D "simple-mfd"; > > > > > + reg =3D <0x0 0x146bf000 0x0 0x1000>; > > > > > + ranges =3D <0x0 0x0 0x146bf000 0x1000>; > > > > > + #address-cells =3D <1>; > > > > > + #size-cells =3D <1>; > > > > > + status =3D "okay"; > > > > > > > > Don't show status in examples. > > > > > > > > > + > > > > > + xbl@a94 { > > > > > + compatible =3D "microsoft,sm8150-surface-duo-xbl"; > > > > > + reg =3D <0xa94 0x100>; > > > > > + status =3D "okay"; > > > > > + }; > > > > > + }; > > > > > + }; > > > > > diff --git a/MAINTAINERS b/MAINTAINERS index > > > > > 13f9a84a617e..5d0ca2a98b57 100644 > > > > > --- a/MAINTAINERS > > > > > +++ b/MAINTAINERS > > > > > @@ -12649,6 +12649,13 @@ F: Documentation/driver- > > > > api/surface_aggregator/clients/dtx.rst > > > > > F: drivers/platform/surface/surface_dtx.c > > > > > F: include/uapi/linux/surface_aggregator/dtx.h > > > > > > > > > > +MICROSOFT SURFACE DUO XBL DRIVER > > > > > +M: Jarrett Schultz > > > > > +L: linux-arm-msm@vger.kernel.org > > > > > +L: platform-driver-x86@vger.kernel.org > > > > > +S: Supported > > > > > +F: > Documentation/devicetree/bindings/platform/microsoft/surface- > > > > xbl.yaml > > > > > + > > > > > MICROSOFT SURFACE GPE LID SUPPORT DRIVER > > > > > M: Maximilian Luz > > > > > L: platform-driver-x86@vger.kernel.org > > > > > -- > > > > > 2.25.1 > > > > > > > > > >