From patchwork Fri Aug 10 08:04:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 956054 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="hyVrD2uP"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 41myNh2Yjhz9s7Q for ; Fri, 10 Aug 2018 18:05:40 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727545AbeHJKeW (ORCPT ); Fri, 10 Aug 2018 06:34:22 -0400 Received: from mail-wr1-f65.google.com ([209.85.221.65]:37310 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727539AbeHJKeV (ORCPT ); Fri, 10 Aug 2018 06:34:21 -0400 Received: by mail-wr1-f65.google.com with SMTP id u12-v6so7467099wrr.4 for ; Fri, 10 Aug 2018 01:05:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=auDnQ2msgcUIg2cR1NJaWEIgp9qglPcIziHCsh4zH4c=; b=hyVrD2uPCuDfG/SIVDF3sBQ3x5jPiEIiYfLhv4zCCwnLblKSqKqaAzB+653FJmrvzf 0e7bBYw1HAepWkf2U4LVpYgUjfZrKoVVh4FsuGcBMtiS+/SWcQle/y6aNI/rL+0drHQg jcV8QsqKTyRZoOsyt22VpaW9vTwkAFYZTn1EnN/IUhBp0W1GI+T7fDyIzwF8CX0/JejB qn+I0si68PVnhgSRuSUiRLU6KdgC6+/mrYiJiPtsG7TV+4jK228jLAs+oFZgJk5AfIKU lxIvEZrz9jOSA4FcAwwpvSafLhEQSuDJiaUTmMC9+byu6RvzOqCz0+7HA0qUPdS3cEax mGZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=auDnQ2msgcUIg2cR1NJaWEIgp9qglPcIziHCsh4zH4c=; b=njbQdx2c7FPPegje6pjQeenjy4P3LHRWl/gSGx90n/r5mKaXVFCmvdmVG0tQYeTtVH 4gLr3BKCZfk4/iDX9Fu76u3DlYByzF8cNswSA1OS2R3kp6RucZAZ0H/+SlREXwWZpbOD 55AHqwqrlQihd6Xwn/VnRcOEVKx+20H2Jqwg0VDDxRkN+x/a6tBdyAviocTFyxJQ8Jo5 y8IeOra4qwSc1eYkZmrBC2q2FwhJfPvpwkVt2bvUeQ6kV/vjTit4wRx29nUuySNbrQXV e+S72zQiUwC7HRRBefeLFvFxxYS9B4OeaXqqMkLJBsfutRuAAduj2gXLtMd2VjvJoT08 5z6w== X-Gm-Message-State: AOUpUlE7iY3oiBkf5T51GjYJ4C6hl8eVIyJaGHICJ2D+OS2igUjNn3nw 1WNALSE2QtQd6D6Lx1LOveSnVg== X-Google-Smtp-Source: AA+uWPymFzn6I/ZI2lEGyhAt132NMNyj5wgE/WcirkCrpDDb/X28TuLJrG8472LzrmsGj41RTdm2uw== X-Received: by 2002:adf:c78e:: with SMTP id l14-v6mr3521076wrg.230.1533888335767; Fri, 10 Aug 2018 01:05:35 -0700 (PDT) Received: from brgl-bgdev.lan (LFbn-MAR-1-609-89.w90-118.abo.wanadoo.fr. [90.118.185.89]) by smtp.gmail.com with ESMTPSA id h7-v6sm9546405wrs.8.2018.08.10.01.05.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 10 Aug 2018 01:05:35 -0700 (PDT) From: Bartosz Golaszewski To: Jonathan Corbet , Sekhar Nori , Kevin Hilman , Russell King , Arnd Bergmann , Greg Kroah-Hartman , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Grygorii Strashko , "David S . Miller" , Srinivas Kandagatla , Naren , Mauro Carvalho Chehab , Andrew Morton , Lukas Wunner , Dan Carpenter , Florian Fainelli , Ivan Khoronzhuk , Sven Van Asbroeck , Paolo Abeni , Alban Bedel , Rob Herring , David Lechner , Andrew Lunn Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org, netdev@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 02/29] Documentation: nvmem: document lookup entries Date: Fri, 10 Aug 2018 10:04:59 +0200 Message-Id: <20180810080526.27207-3-brgl@bgdev.pl> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180810080526.27207-1-brgl@bgdev.pl> References: <20180810080526.27207-1-brgl@bgdev.pl> Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org From: Bartosz Golaszewski Describe the usage of nvmem cell lookup tables. Signed-off-by: Bartosz Golaszewski --- Documentation/nvmem/nvmem.txt | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/nvmem/nvmem.txt b/Documentation/nvmem/nvmem.txt index 8d8d8f58f96f..9d5e3ca2b4f3 100644 --- a/Documentation/nvmem/nvmem.txt +++ b/Documentation/nvmem/nvmem.txt @@ -58,6 +58,34 @@ static int qfprom_probe(struct platform_device *pdev) It is mandatory that the NVMEM provider has a regmap associated with its struct device. Failure to do would return error code from nvmem_register(). +Additionally it is possible to create nvmem cell lookup entries and register +them with the nvmem framework from machine code as shown in the example below: + +static struct nvmem_cell_lookup foobar_lookup = { + .info = { + .name = "mac-address", + .offset = 0xd000, + .bytes = ERH_ALEN, + }, + .nvmem_name = "foobar", +}; + +static void foobar_register(void) +{ + ... + nvmem_add_lookup_table(&foobar_lookup, 1); + ... +} + +A lookup entry table can be later removed if needed: + +static void foobar_fini(void) +{ + ... + nvmem_del_lookup_table(&foobar_lookup, 1); + ... +} + NVMEM Consumers +++++++++++++++