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Thu, 12 Dec 2019 17:25:43 +0000 From: Chris Brandt To: Mark Brown CC: Sergei Shtylyov , Rob Herring , Mark Rutland , Geert Uytterhoeven , Michael Turquette , Stephen Boyd , "linux-spi@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-renesas-soc@vger.kernel.org" , "linux-clk@vger.kernel.org" , Mason Yang Subject: RE: [PATCH v2 0/6] spi: Add Renesas SPIBSC controller Thread-Topic: [PATCH v2 0/6] spi: Add Renesas SPIBSC controller Thread-Index: AQHVrDsFo/XrCnZmIE+HK5Vec6rH7qevIW6AgAK0x/CAA35sAIABOkowgAAaWYCAABMxUIAACeyAgAAAr9A= Date: Thu, 12 Dec 2019 17:25:43 +0000 Message-ID: References: <20191206134202.18784-1-chris.brandt@renesas.com> <922cfa46-efb5-9e6d-67ea-3ac505b8211c@cogentembedded.com> <20191212152855.GD4310@sirena.org.uk> <20191212171307.GL4310@sirena.org.uk> In-Reply-To: <20191212171307.GL4310@sirena.org.uk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-ref: PG1ldGE+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcY2JyYW5kdDAxXGFwcGRhdGFccm9hbWluZ1wwOWQ4NDliNi0zMmQzLTRhNDAtODVlZS02Yjg0YmEyOWUzNWJcbXNnc1xtc2ctNmE1ZDEzMDQtMWQwNC0xMWVhLWFhNTUtOTRlNmY3Njc5M2FlXGFtZS10ZXN0XDZhNWQxMzA1LTFkMDQtMTFlYS1hYTU1LTk0ZTZmNzY3OTNhZWJvZHkudHh0IiBzej0iMTAzMiIgdD0iMTMyMjA2NDUxNDAwOTQ0NDg0IiBoPSJ1MldOdUNvbm1IZm1kcGZaWU1kTWlJcUNKOVU9IiBpZD0iIiBibD0iMCIgYm89IjEiLz48L21ldGE+ x-dg-rorf: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Chris.Brandt@renesas.com; 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x-microsoft-antispam-message-info: iuSoZW3blgNES/72JV9jeJ4s/9BXemxA05LnI74Moh7WeJEZnrjwR1mDbC/hX+lAvBuXJu2NssUAB2nV3gAdkK2pjCHGrCGiem5kNoZUNStsiC4T9/MboxK2iKvvUR1w3YfiAhRYHyxluONrddYJ7xvM1PFofe9pwhitdijrADwg4zFeWsxhgfJOmyWDaXz8TNGSwFacPON048F1Vl812vZEvqQ+VhxRiXv3VJku8VJRwUEeEh4RMmoDrEg+g5CGiGY6jBt9Rm3P9Iw3qctp/0x10CLh7DyfpWC0IjQmxS/orsrhgEjFmzY1ldMIb7Rjb2yrD/VEBWBOFJwlz5WfHR81yQeCzY6LKZPBiVoDmrcAXEgM0N65h3QAElW52xc6i1zgAcK88e1sFvt9mM+kSS0hrdr9haHg+dT8nb4zmJoCpufiB6O5Q0FnQVR9bY9i x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: renesas.com X-MS-Exchange-CrossTenant-Network-Message-Id: 74c6fd99-1a80-47cc-b8f8-08d77f28511d X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Dec 2019 17:25:43.1566 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 53d82571-da19-47e4-9cb4-625a166a4a2a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: q0brWz6f9SDtp6x2scpUkItr0UskvJjcTSQoEAh0YFWk4WXd463NZ7kkC4BGkkH6jeJYqWuMNKloL52hL7GLH5AN4JJu6eHgxnVQYwgBDIk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: TY1PR01MB1866 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, Dec 12, 2019, Mark Brown wrote: > Oh, this is a new driver for the same hardware as the RPC driver :( Correct. More or less. Of the 3 devices (RZ/A1, RZ/A2, R-Car), RZ/A1 only supported SPI. RZ/A2 and R-Car now support SPI and HyperFlash. But in my laziness, I never upstreamed the RZ/A1 driver 2 year ago...so her= e we are :) > I don't really know enough about the device and there was *huge* amounts > of discussion which I'd have to try to page in so it'd be really good if > there were some agreement among those of you working with this device as > to what the best way forwards is. I'm not sure any of the issues were > at the framework level so that's probably more sensible anyway. I'm trying to figure out if the differences are 'technical' or 'ideological' (ie, R-Car use cases vs RZ use cases). Of course we can do anything we want in our vendor BSPs, but I'd like to see a common upstream path. Chris