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From: Trent Piepho <tpiepho@kymetacorp.com>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: "barebox@lists.infradead.org" <barebox@lists.infradead.org>
Subject: Re: [PATCH 00/17] RFC for additional 'nvmem' plumbing
Date: Wed, 17 Feb 2016 03:09:54 +0000	[thread overview]
Message-ID: <1455678623.18517.81.camel@rtred1test09.kymeta.local> (raw)
In-Reply-To: <1455672559-25061-1-git-send-email-andrew.smirnov@gmail.com>

On Tue, 2016-02-16 at 17:29 -0800, Andrey Smirnov wrote:
> Hi everyone,
> 
> The main purpose of this patchset is propose additional Nvmem plubing
> needed for that subsytem's inclusion in BB and solicit feedback about
> it (patches ## 15 to 17) . Included in this set are also a number of
> bugfixes and RFC-for-bugfixes for problems that were discoverd during
> development of this patch series.
> 
> Proposed Nvmem additions are two new platform device drivers that
> implement a nvmem interface on top of data embedded in DT as well as
> nvmem interface that allows to combine existing nvmem-accesible bytes
> into continuous blocks.
> 
> Below is an example of DT code that uses both drivers in order to
> create a MAC address as a combination of bytes from DT and OCOTP
> module:

So for a common case Sasha has pointed out, of the MAC in the opposite
byte order, one would write:

	scatter-gather-blob {
		compatible = "barebox,nvmem-sg";
		#address-cells = <1>;
		#size-cells = <1>;

		mac_address: combined-bits {
			reg = <0 6>;
			layout = <&fec_mac_address 5 1
			          &fec_mac_address 4 1
			          &fec_mac_address 3 1
			          &fec_mac_address 2 1
			          &fec_mac_address 1 1
			          &fec_mac_address 0 1>;
		};
	};

	&ocotp {
	        #address-cells = <1>;
	       	#size-cells = <1>;

		fec_mac_address: mac_address@88 {
			reg = <0x88 0x8>;
		};
	};

        &fec {
		?mac-address-location?? = <&mac_address>;
	};

I suppose that's a very powerful system, but it does seem a bit
cumbersome.
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  parent reply	other threads:[~2016-02-17  3:10 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-17  1:29 Andrey Smirnov
2016-02-17  1:29 ` [PATCH 01/18] common: Add EPROBE_DEFER to strerror Andrey Smirnov
2016-02-17  1:29 ` [PATCH 02/18] base: driver.c: Coalesce error checking code Andrey Smirnov
2016-02-17  1:29 ` [PATCH 03/18] [RFC] at91: Make IS_ERR work for I/O pointers Andrey Smirnov
2016-02-17  8:34   ` Sascha Hauer
2016-02-17 20:39     ` Andrey Smirnov
2016-02-18 10:26       ` Sascha Hauer
2016-02-17  1:29 ` [PATCH 04/18] [RFC] base/driver.c: Remove dev_request_mem_region_err_null Andrey Smirnov
2016-02-17  1:29 ` [PATCH 05/18] i2c-at91: Use IS_ERR instead of checking for NULL Andrey Smirnov
2016-02-17  1:29 ` [PATCH 06/18] clk-imx6: Call clk_enable on mmdc_ch0_axi_podf Andrey Smirnov
2016-02-17  1:29 ` [PATCH 07/18] fec_imx: Deallocate clocks when probe fails Andrey Smirnov
2016-02-17  1:29 ` [PATCH 08/18] [RFC] base: Introduce dev_request_mem_resource Andrey Smirnov
2016-02-17  1:29 ` [PATCH 09/18] fec_imx: Deallocate I/O resources if probe fails Andrey Smirnov
2016-02-17  1:29 ` [PATCH 10/18] fec_imx: Free phy_reset GPIO if when " Andrey Smirnov
2016-02-17  1:29 ` [PATCH 11/18] fec_imx: Use FEC_ECNTRL_RESET instead of a magic number Andrey Smirnov
2016-02-17  1:29 ` [PATCH 12/18] fec_imx: Impelemnt reset timeout Andrey Smirnov
2016-02-17  8:43   ` Sascha Hauer
2016-02-17  1:29 ` [PATCH 13/18] fec_imx: Deallocate DMA buffers when probe fails Andrey Smirnov
2016-02-17  1:29 ` [PATCH 14/18] fec_imx: Unregister MDIO " Andrey Smirnov
2016-02-17  1:29 ` [PATCH 15/18] [RFC] net: eth: Always use DEVICE_ID_DYNAMIC Andrey Smirnov
2016-02-17  2:40   ` Trent Piepho
2016-02-17  4:16     ` Andrey Smirnov
2016-02-18 19:30       ` Trent Piepho
2016-02-19 17:17         ` Andrey Smirnov
2016-02-17  1:29 ` [PATCH 16/18] [RFC] nvmem: Add of_nvmem_cell_from_cell_np Andrey Smirnov
2016-02-17  1:29 ` [PATCH 17/18] [RFC] nvmem: Add nvmem-ro-of-blob driver Andrey Smirnov
2016-02-17  8:52   ` Sascha Hauer
2016-02-17 20:40     ` Andrey Smirnov
2016-02-17  1:29 ` [PATCH 18/18] [RFC] nvmem: Add nvmem-sg driver Andrey Smirnov
2016-02-17  3:09 ` Trent Piepho [this message]
2016-02-17  4:20   ` [PATCH 00/17] RFC for additional 'nvmem' plumbing Andrey Smirnov

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