From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7812C17441 for ; Tue, 12 Nov 2019 20:31:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9EBE4206A3 for ; Tue, 12 Nov 2019 20:31:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Us+JxrYy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727229AbfKLUbh (ORCPT ); Tue, 12 Nov 2019 15:31:37 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:38615 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726388AbfKLUbg (ORCPT ); Tue, 12 Nov 2019 15:31:36 -0500 Received: by mail-pf1-f196.google.com with SMTP id c13so14159550pfp.5; Tue, 12 Nov 2019 12:31:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2WU8r6NpH8n/CAS7MCMpaG3QRhluQOgBbEqgwxXZR2E=; b=Us+JxrYyd+rY75W/J9AIM4yuTXlc0JbmG5DVkC1peMShddlgvcBQ+TtsEwwQreFGei Akp3nnqEhYSZ8Pd3qpGb7GnNfaISvZQGlq5ZoE84GzeytmLnXQngF7NX4/maqFkRg3TU sSJooTtqEPzyjeABXL9Gip+xaSbzM8StiPMP/Y/5ebEBjyhk2ia4l7IZ5h1v4wv9dD25 U/QM4DjQaR3H+eQDxi7LxoWgOi4R3Fe2IzIYYXiRq4zqO51ahBVbcOu/1fSF9m1eg66N jjve6icUXHklXyJqpWp8u7AiCQBElHtjuLx1uFtfevhego5TE/tJ1xhpJTkdgACtOpHR Vc1g== 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:mime-version :content-transfer-encoding; bh=2WU8r6NpH8n/CAS7MCMpaG3QRhluQOgBbEqgwxXZR2E=; b=H9NOxzblVmmrgeie+zzIQ50aOX6bl1bLbgZqXWpAMfzKEktcXNlXViVkDuCizzI+T9 ya69mwU4VRisWpFj2r/cEbG5k6FNlHNQ0rtxnP2MA2uv4LMyqtLNXD2oyU5ZAE2gN8gM 3BalD8nKUIboOfg7HeqmY7rsp7ws0ulRT86z0Ia+DpcT7E/np4aoVSbhZKOfRURuoDrs keX0ZdxYhm9yxAebrErAOU+TH9VE5TcWvQVAac9cQY8aQv0j94UU1ZNDIbuEE4G13s2s eB0yS5+98NU/W2YD6zo9qrDe+OFHGT3SewHtmctImviVH/R2ycg+yEZwuSTyKcGvH23B 8Ljw== X-Gm-Message-State: APjAAAV6Ol5CRen7oJ3AZUXYVRLzdibLx2u+j9+MguYg6KGr2FGHyP1n LXvlBvDi8FIun6MHdtwN4kg= X-Google-Smtp-Source: APXvYqzVLDHrf3+auWD9Zfwn7HuZakoXwALGy5b2yZuKAYku2zY5xND/HTO7WI3MKhV1doF14qehEA== X-Received: by 2002:a62:7c52:: with SMTP id x79mr38241350pfc.18.1573590695493; Tue, 12 Nov 2019 12:31:35 -0800 (PST) Received: from dtor-ws.mtv.corp.google.com ([2620:15c:202:201:3adc:b08c:7acc:b325]) by smtp.gmail.com with ESMTPSA id h13sm23264084pfr.98.2019.11.12.12.31.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Nov 2019 12:31:34 -0800 (PST) From: Dmitry Torokhov To: Wolfram Sang Cc: linux-iio@vger.kernel.orgi, Luca Ceresoli , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, Hartmut Knaack , Jonathan Cameron , Lars-Peter Clausen , Peter Meerwald-Stadler , linux-iio@vger.kernel.org Subject: [PATCH v3 0/3] Use void pointers instead of char in I2C transfer APIs Date: Tue, 12 Nov 2019 12:31:29 -0800 Message-Id: <20191112203132.163306-1-dmitry.torokhov@gmail.com> X-Mailer: git-send-email 2.24.0.rc1.363.gb1bccd3e3d-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While we indeed often deal with a stream of bytes when executing a transfer, at the higher layers we usually work with more structured data, and there is not really a reason to require casts to u8 * form the callers. These series change I2C APIs to accept [const] void pointers, and also adjust SMBUS implementation to use get/put_unaligned_16() and memcpy() for moving data around. Changes in v3: - addressed Luca's comments - added Jonathan's Acked-by - split put_unaligned_le16 into a separate patch - more call sites converted to get/put_unaligned_le16 - new patch using memcpy() for moving data around Changes in v2: - adjusted max1363 to the new i2c_master_send/recv signatures Dmitry Torokhov (3): i2c: use void pointers for supplying data for reads and writes i2c: smbus: use get/put_unaligned_le16 when working with word data i2c: smbus: switch from loops to memcpy drivers/i2c/i2c-core-base.c | 2 +- drivers/i2c/i2c-core-smbus.c | 40 +++++++++++++++--------------------- drivers/iio/adc/max1363.c | 14 +++++++------ include/linux/i2c.h | 28 +++++++++++++------------ 4 files changed, 41 insertions(+), 43 deletions(-) -- 2.24.0.rc1.363.gb1bccd3e3d-goog