From mboxrd@z Thu Jan  1 00:00:00 1970
From: srinivas.kandagatla@linaro.org (Srinivas Kandagatla)
Date: Tue, 21 Aug 2018 10:50:07 +0100
Subject: [PATCH v2 06/29] mtd: Add support for reading MTD devices via the
 nvmem API
In-Reply-To: <20180820202038.5d3dc195@bbrezillon>
References: <20180810080526.27207-1-brgl@bgdev.pl>
 <20180810080526.27207-7-brgl@bgdev.pl> <20180817182720.6a6e5e8e@bbrezillon>
 <20180819133106.0420df5f@tock> <20180819184609.6dcdbb9a@bbrezillon>
 <5b8c30b8-41e1-d59e-542b-fef6c6469ff0@linaro.org>
 <20180820202038.5d3dc195@bbrezillon>
Message-ID: <e0ec3194-fd3a-9b3d-fba8-f88447eb56e9@linaro.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org



On 20/08/18 19:20, Boris Brezillon wrote:
> On Mon, 20 Aug 2018 11:43:34 +0100
> Srinivas Kandagatla <srinivas.kandagatla@linaro.org> wrote:
> 
>>
>> Overall am still not able to clear visualize on how MTD bindings with
>> nvmem cells would look in both partition and un-partition usecases?
>> An example DT would be nice here!!
> 
> Something along those lines:
> 
This looks good to me.
> 	mtdnode {
> 		nvmem-cells {
> 			#address-cells = <1>;
> 			#size-cells = <1>;
> 
> 			cell at 0 {
> 				reg = <0x0 0x14>;
> 			};
> 		};
> 
> 		partitions {
> 			compatible = "fixed-partitions";
> 			#address-cells = <1>;
> 			#size-cells = <1>;
> 
> 			partition at 0 {
> 				reg = <0x0 0x20000>;
> 
> 				nvmem-cells {
> 					#address-cells = <1>;
> 					#size-cells = <1>;
> 
> 					cell at 0 {
> 						reg = <0x0 0x10>;
> 					};
> 				};
> 			};
> 		};
> 	}; >

Just curious...Is there a reason why we can't do it like this?:
Is this because of issue of #address-cells and #size-cells Or mtd 
bindings always prefer subnodes?

	mtdnode {
		reg = <0x0123000 0x40000>;
		#address-cells = <1>;
		#size-cells = <1>;
		cell at 0 {
			compatible = "nvmem-cell";
			reg = <0x0 0x14>;
		};

		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition at 0 {
				reg = <0x0 0x20000>;
				cell at 0 {
					compatible = "nvmem-cell";
					reg = <0x0 0x10>;
				};
			};
		};
	};

Am okay either way!

thanks,
srini