From patchwork Fri Jan 22 19:24:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430597 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMvM03DJNz9sB4 for ; Sat, 23 Jan 2021 09:39:08 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728400AbhAVTsG (ORCPT ); Fri, 22 Jan 2021 14:48:06 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38510 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730486AbhAVTZ4 (ORCPT ); Fri, 22 Jan 2021 14:25:56 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:05 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4v9019220; Fri, 22 Jan 2021 21:25:05 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 1/7] i2c: mux: mlxcpld: Update module license Date: Fri, 22 Jan 2021 21:24:56 +0200 Message-Id: <20210122192502.17645-2-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Update license to SPDX-License. Signed-off-by: Vadim Pasternak Acked-by: Peter Rosin --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 33 +++------------------------------ 1 file changed, 3 insertions(+), 30 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 5ed55ca4fe93..53bce81cf5c9 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -1,35 +1,8 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* - * drivers/i2c/muxes/i2c-mux-mlxcpld.c - * Copyright (c) 2016 Mellanox Technologies. All rights reserved. - * Copyright (c) 2016 Michael Shych + * Mellanox i2c mux driver * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the names of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. + * Copyright (C) 2016-2020 Mellanox Technologies */ #include From patchwork Fri Jan 22 19:24:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430596 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMvLL6YHXz9sRR for ; Sat, 23 Jan 2021 09:38:34 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728458AbhAVTs0 (ORCPT ); Fri, 22 Jan 2021 14:48:26 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38513 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730487AbhAVTZ4 (ORCPT ); Fri, 22 Jan 2021 14:25:56 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:06 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vA019220; Fri, 22 Jan 2021 21:25:06 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 2/7] platform/x86: mlxcpld: Update module license Date: Fri, 22 Jan 2021 21:24:57 +0200 Message-Id: <20210122192502.17645-3-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Update license to SPDX-License. Signed-off-by: Vadim Pasternak Acked-by: Peter Rosin --- include/linux/platform_data/x86/mlxcpld.h | 34 +++---------------------------- 1 file changed, 3 insertions(+), 31 deletions(-) diff --git a/include/linux/platform_data/x86/mlxcpld.h b/include/linux/platform_data/x86/mlxcpld.h index b08dcb183fca..e6c18bf017dd 100644 --- a/include/linux/platform_data/x86/mlxcpld.h +++ b/include/linux/platform_data/x86/mlxcpld.h @@ -1,36 +1,8 @@ +/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ /* - * mlxcpld.h - Mellanox I2C multiplexer support in CPLD + * Mellanox I2C multiplexer support in CPLD * - * Copyright (c) 2016 Mellanox Technologies. All rights reserved. - * Copyright (c) 2016 Michael Shych - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the names of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. + * Copyright (C) 2016-2020 Mellanox Technologies */ #ifndef _LINUX_I2C_MLXCPLD_H From patchwork Fri Jan 22 19:24:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430593 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMvKn1nS4z9sB4 for ; Sat, 23 Jan 2021 09:38:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728525AbhAVTsn (ORCPT ); Fri, 22 Jan 2021 14:48:43 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38516 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730489AbhAVTZ4 (ORCPT ); Fri, 22 Jan 2021 14:25:56 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:08 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vB019220; Fri, 22 Jan 2021 21:25:07 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 3/7] i2c: mux: mlxcpld: Move header file out of x86 realm Date: Fri, 22 Jan 2021 21:24:58 +0200 Message-Id: <20210122192502.17645-4-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Move out header file from include/linux/platform_data/x86/ to include/linux/platform_data/, since it does not depend on x86 architecture. Signed-off-by: Vadim Pasternak Reviewed-by: Michael Shych Acked-by: Peter Rosin --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 2 +- include/linux/platform_data/{x86 => }/mlxcpld.h | 0 2 files changed, 1 insertion(+), 1 deletion(-) rename include/linux/platform_data/{x86 => }/mlxcpld.h (100%) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 53bce81cf5c9..3d894cfb19df 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -11,7 +11,7 @@ #include #include #include -#include +#include #include #include diff --git a/include/linux/platform_data/x86/mlxcpld.h b/include/linux/platform_data/mlxcpld.h similarity index 100% rename from include/linux/platform_data/x86/mlxcpld.h rename to include/linux/platform_data/mlxcpld.h From patchwork Fri Jan 22 19:24:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430512 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMqdg1szLz9s24 for ; Sat, 23 Jan 2021 06:51:35 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728583AbhAVTsx (ORCPT ); Fri, 22 Jan 2021 14:48:53 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38530 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730532AbhAVT0G (ORCPT ); Fri, 22 Jan 2021 14:26:06 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:10 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vC019220; Fri, 22 Jan 2021 21:25:09 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 4/7] i2c: mux: mlxcpld: Convert driver to platform driver Date: Fri, 22 Jan 2021 21:24:59 +0200 Message-Id: <20210122192502.17645-5-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Convert driver from 'i2c' to 'platform'. The motivation is to avoid I2C addressing conflict between ‘i2c-mux-cpld’ driver, providing mux selection and deselection through CPLD ‘mux control’ register, and CPLD host driver. The CPLD is I2C device and is multi-functional device performing logic for different components, like LED, ‘hwmon’, interrupt control, watchdog etcetera. For such configuration CPLD should be host I2C device, connected to the relevant I2C bus with the relevant I2C address and all others component drivers are supposed to be its children. The hierarchy in such case will be like in the below example: ls /sys/bus/i2c/devices/44-0032 i2c-mux-mlxcpld.44 leds-mlxreg.44 mlxreg-io.44 ls /sys/bus/i2c/devices/44-0032/i2c-mux-mlxcpld.44 channel-0, …, channel-X Currently this driver is not activated by any kernel driver, so this conversion doesn’t affect any user. Signed-off-by: Vadim Pasternak Reviewed-by: Michael Shych --- v1->v2: Comments pointed out by Peter: - Drop change for last channel setting in mlxcpld_mux_deselect(). --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 62 +++++++++++++++++-------------------- 1 file changed, 28 insertions(+), 34 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 3d894cfb19df..b53f1479272d 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -20,10 +20,12 @@ /* mlxcpld_mux - mux control structure: * @last_chan - last register value * @client - I2C device client + * @pdata: platform data */ struct mlxcpld_mux { u8 last_chan; struct i2c_client *client; + struct mlxcpld_mux_plat_data pdata; }; /* MUX logic description. @@ -54,37 +56,30 @@ struct mlxcpld_mux { * */ -static const struct i2c_device_id mlxcpld_mux_id[] = { - { "mlxcpld_mux_module", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, mlxcpld_mux_id); - /* Write to mux register. Don't use i2c_transfer() and i2c_smbus_xfer() * for this as they will try to lock adapter a second time. */ static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, - struct i2c_client *client, u8 val) + struct mlxcpld_mux *mux, u8 val) { - struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev); + struct i2c_client *client = mux->client; union i2c_smbus_data data = { .byte = val }; return __i2c_smbus_xfer(adap, client->addr, client->flags, - I2C_SMBUS_WRITE, pdata->sel_reg_addr, + I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr, I2C_SMBUS_BYTE_DATA, &data); } static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) { - struct mlxcpld_mux *data = i2c_mux_priv(muxc); - struct i2c_client *client = data->client; + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); u8 regval = chan + 1; int err = 0; /* Only select the channel if its different from the last channel */ - if (data->last_chan != regval) { - err = mlxcpld_mux_reg_write(muxc->parent, client, regval); - data->last_chan = err < 0 ? 0 : regval; + if (mux->last_chan != regval) { + err = mlxcpld_mux_reg_write(muxc->parent, mux, regval); + mux->last_chan = err < 0 ? 0 : regval; } return err; @@ -92,21 +87,19 @@ static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) static int mlxcpld_mux_deselect(struct i2c_mux_core *muxc, u32 chan) { - struct mlxcpld_mux *data = i2c_mux_priv(muxc); - struct i2c_client *client = data->client; + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); /* Deselect active channel */ - data->last_chan = 0; + mux->last_chan = 0; - return mlxcpld_mux_reg_write(muxc->parent, client, data->last_chan); + return mlxcpld_mux_reg_write(muxc->parent, mux, mux->last_chan); } /* Probe/reomove functions */ -static int mlxcpld_mux_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static int mlxcpld_mux_probe(struct platform_device *pdev) { - struct i2c_adapter *adap = client->adapter; - struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&client->dev); + struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&pdev->dev); + struct i2c_client *client = to_i2c_client(pdev->dev.parent); struct i2c_mux_core *muxc; int num, force; struct mlxcpld_mux *data; @@ -115,18 +108,20 @@ static int mlxcpld_mux_probe(struct i2c_client *client, if (!pdata) return -EINVAL; - if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return -ENODEV; - muxc = i2c_mux_alloc(adap, &client->dev, CPLD_MUX_MAX_NCHANS, + muxc = i2c_mux_alloc(client->adapter, &pdev->dev, CPLD_MUX_MAX_NCHANS, sizeof(*data), 0, mlxcpld_mux_select_chan, mlxcpld_mux_deselect); if (!muxc) return -ENOMEM; + platform_set_drvdata(pdev, muxc); data = i2c_mux_priv(muxc); - i2c_set_clientdata(client, muxc); data->client = client; + memcpy(&data->pdata, pdata, sizeof(*pdata)); data->last_chan = 0; /* force the first selection */ /* Create an adapter for each channel. */ @@ -149,24 +144,23 @@ static int mlxcpld_mux_probe(struct i2c_client *client, return err; } -static int mlxcpld_mux_remove(struct i2c_client *client) +static int mlxcpld_mux_remove(struct platform_device *pdev) { - struct i2c_mux_core *muxc = i2c_get_clientdata(client); + struct i2c_mux_core *muxc = platform_get_drvdata(pdev); i2c_mux_del_adapters(muxc); return 0; } -static struct i2c_driver mlxcpld_mux_driver = { - .driver = { - .name = "mlxcpld-mux", +static struct platform_driver mlxcpld_mux_driver = { + .driver = { + .name = "i2c-mux-mlxcpld", }, - .probe = mlxcpld_mux_probe, - .remove = mlxcpld_mux_remove, - .id_table = mlxcpld_mux_id, + .probe = mlxcpld_mux_probe, + .remove = mlxcpld_mux_remove, }; -module_i2c_driver(mlxcpld_mux_driver); +module_platform_driver(mlxcpld_mux_driver); MODULE_AUTHOR("Michael Shych (michaels@mellanox.com)"); MODULE_DESCRIPTION("Mellanox I2C-CPLD-MUX driver"); From patchwork Fri Jan 22 19:25:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430514 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMqdh0BdMz9sS8 for ; Sat, 23 Jan 2021 06:51:36 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728684AbhAVTtM (ORCPT ); Fri, 22 Jan 2021 14:49:12 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38532 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730534AbhAVT0G (ORCPT ); Fri, 22 Jan 2021 14:26:06 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:11 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vD019220; Fri, 22 Jan 2021 21:25:11 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 5/7] i2c: mux: mlxcpld: Extend driver to support word address space devices Date: Fri, 22 Jan 2021 21:25:00 +0200 Message-Id: <20210122192502.17645-6-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Extend driver to allow I2C routing control through CPLD devices with word address space. Till now only CPLD devices with byte address space have been supported. Signed-off-by: Vadim Pasternak Reviewed-by: Michael Shych --- v1->v2: Comments pointed out by Peter: - Remove data buffer allocation from 'mlxcpld_mux' structure, do it on stack instead. - Do not use array pdata.adap_ids[] in mlxcpld_mux_reg_write() for channel assignment. - Return back 'regval' variable, used for channel assignment in mlxcpld_mux_select_chan(). - Fix functionality validation in mlxcpld_mux_probe(). - Fix comment for 'reg_size' field in mlxcpld_mux_plat_data' structure. Added by Vadim: - Change type of register select address to '__be16' to align with type in assignment in cpu_to_be16(). --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 54 ++++++++++++++++++++++++++++------- include/linux/platform_data/mlxcpld.h | 2 ++ 2 files changed, 46 insertions(+), 10 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index b53f1479272d..4848dd4ff41a 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -21,11 +21,13 @@ * @last_chan - last register value * @client - I2C device client * @pdata: platform data + * @sel_reg_addr: mux select/deselect register address */ struct mlxcpld_mux { u8 last_chan; struct i2c_client *client; struct mlxcpld_mux_plat_data pdata; + __be16 sel_reg_addr; }; /* MUX logic description. @@ -60,24 +62,43 @@ struct mlxcpld_mux { * for this as they will try to lock adapter a second time. */ static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, - struct mlxcpld_mux *mux, u8 val) + struct mlxcpld_mux *mux, int chan) { struct i2c_client *client = mux->client; - union i2c_smbus_data data = { .byte = val }; - - return __i2c_smbus_xfer(adap, client->addr, client->flags, - I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr, - I2C_SMBUS_BYTE_DATA, &data); + union i2c_smbus_data data; + struct i2c_msg msg; + u8 buf[3]; + + switch (mux->pdata.reg_size) { + case 1: + data.byte = (chan < 0) ? 0 : chan; + return __i2c_smbus_xfer(adap, client->addr, client->flags, + I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr, + I2C_SMBUS_BYTE_DATA, &data); + case 2: + memcpy(buf, &mux->sel_reg_addr, 2); + buf[2] = chan; + msg.addr = client->addr; + msg.buf = buf; + msg.len = mux->pdata.reg_size + 1; + msg.flags = 0; + return __i2c_transfer(adap, &msg, 1); + default: + return -EINVAL; + } } static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) { struct mlxcpld_mux *mux = i2c_mux_priv(muxc); - u8 regval = chan + 1; + u8 regval = chan; int err = 0; + if (mux->pdata.reg_size == 1) + regval += 1; + /* Only select the channel if its different from the last channel */ - if (mux->last_chan != regval) { + if (mux->last_chan != chan) { err = mlxcpld_mux_reg_write(muxc->parent, mux, regval); mux->last_chan = err < 0 ? 0 : regval; } @@ -103,13 +124,24 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) struct i2c_mux_core *muxc; int num, force; struct mlxcpld_mux *data; + u32 func; int err; if (!pdata) return -EINVAL; - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) + switch (pdata->reg_size) { + case 1: + func = I2C_FUNC_SMBUS_WRITE_BYTE_DATA; + break; + case 2: + func = I2C_FUNC_I2C; + break; + default: + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, func)) return -ENODEV; muxc = i2c_mux_alloc(client->adapter, &pdev->dev, CPLD_MUX_MAX_NCHANS, @@ -122,6 +154,8 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) data = i2c_mux_priv(muxc); data->client = client; memcpy(&data->pdata, pdata, sizeof(*pdata)); + /* Save mux select address for 16 bits transaction size. */ + data->sel_reg_addr = cpu_to_be16(pdata->sel_reg_addr); data->last_chan = 0; /* force the first selection */ /* Create an adapter for each channel. */ diff --git a/include/linux/platform_data/mlxcpld.h b/include/linux/platform_data/mlxcpld.h index e6c18bf017dd..9cb2c3d8293e 100644 --- a/include/linux/platform_data/mlxcpld.h +++ b/include/linux/platform_data/mlxcpld.h @@ -14,11 +14,13 @@ * @adap_ids - adapter array * @num_adaps - number of adapters * @sel_reg_addr - mux select register offset in CPLD space + * @reg_size: register size in bytes */ struct mlxcpld_mux_plat_data { int *adap_ids; int num_adaps; int sel_reg_addr; + u8 reg_size; }; #endif /* _LINUX_I2C_MLXCPLD_H */ From patchwork Fri Jan 22 19:25:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430513 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMqdg4dwGz9sRR for ; Sat, 23 Jan 2021 06:51:35 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728594AbhAVTtC (ORCPT ); Fri, 22 Jan 2021 14:49:02 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38536 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730533AbhAVT0G (ORCPT ); Fri, 22 Jan 2021 14:26:06 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:12 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vE019220; Fri, 22 Jan 2021 21:25:12 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 6/7] i2c: mux: mlxcpld: Extend supported mux number Date: Fri, 22 Jan 2021 21:25:01 +0200 Message-Id: <20210122192502.17645-7-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Allow to extend mux number supported by driver. Currently it is limited by eight, which is not enough for new coming Mellanox modular system with line cards, which require up to 64 mux support. Signed-off-by: Vadim Pasternak Reviewed-by: Michael Shych --- v1->v2: Comments pointed out by Peter: - Remove introducing of 'base_nr' field. - Drop chan increment in mlxcpld_mux_select_chan(). Added by Vadim: - Rename 'adaps_ids' array to 'chan_ids' array. - Drop forcing of adapter 'nr'. --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 19 +++++-------------- include/linux/platform_data/mlxcpld.h | 4 ++-- 2 files changed, 7 insertions(+), 16 deletions(-) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 4848dd4ff41a..7b37d59dc23b 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -15,8 +15,6 @@ #include #include -#define CPLD_MUX_MAX_NCHANS 8 - /* mlxcpld_mux - mux control structure: * @last_chan - last register value * @client - I2C device client @@ -24,7 +22,7 @@ * @sel_reg_addr: mux select/deselect register address */ struct mlxcpld_mux { - u8 last_chan; + int last_chan; struct i2c_client *client; struct mlxcpld_mux_plat_data pdata; __be16 sel_reg_addr; @@ -122,10 +120,9 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&pdev->dev); struct i2c_client *client = to_i2c_client(pdev->dev.parent); struct i2c_mux_core *muxc; - int num, force; struct mlxcpld_mux *data; + int num, err; u32 func; - int err; if (!pdata) return -EINVAL; @@ -144,7 +141,7 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) if (!i2c_check_functionality(client->adapter, func)) return -ENODEV; - muxc = i2c_mux_alloc(client->adapter, &pdev->dev, CPLD_MUX_MAX_NCHANS, + muxc = i2c_mux_alloc(client->adapter, &pdev->dev, pdata->num_adaps, sizeof(*data), 0, mlxcpld_mux_select_chan, mlxcpld_mux_deselect); if (!muxc) @@ -159,14 +156,8 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) data->last_chan = 0; /* force the first selection */ /* Create an adapter for each channel. */ - for (num = 0; num < CPLD_MUX_MAX_NCHANS; num++) { - if (num >= pdata->num_adaps) - /* discard unconfigured channels */ - break; - - force = pdata->adap_ids[num]; - - err = i2c_mux_add_adapter(muxc, force, num, 0); + for (num = 0; num < pdata->num_adaps; num++) { + err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0); if (err) goto virt_reg_failed; } diff --git a/include/linux/platform_data/mlxcpld.h b/include/linux/platform_data/mlxcpld.h index 9cb2c3d8293e..a7bee798d991 100644 --- a/include/linux/platform_data/mlxcpld.h +++ b/include/linux/platform_data/mlxcpld.h @@ -11,13 +11,13 @@ /* Platform data for the CPLD I2C multiplexers */ /* mlxcpld_mux_plat_data - per mux data, used with i2c_register_board_info - * @adap_ids - adapter array + * @chan_ids - channels array * @num_adaps - number of adapters * @sel_reg_addr - mux select register offset in CPLD space * @reg_size: register size in bytes */ struct mlxcpld_mux_plat_data { - int *adap_ids; + int *chan_ids; int num_adaps; int sel_reg_addr; u8 reg_size; From patchwork Fri Jan 22 19:25:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vadim Pasternak X-Patchwork-Id: 1430511 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DMqdX3TJHz9s24 for ; Sat, 23 Jan 2021 06:51:28 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728567AbhAVTsu (ORCPT ); Fri, 22 Jan 2021 14:48:50 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:38538 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730531AbhAVT0F (ORCPT ); Fri, 22 Jan 2021 14:26:05 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from vadimp@nvidia.com) with SMTP; 22 Jan 2021 21:25:13 +0200 Received: from r-build-lowlevel.mtr.labs.mlnx. (r-build-lowlevel.mtr.labs.mlnx [10.209.0.190]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10MJP4vF019220; Fri, 22 Jan 2021 21:25:13 +0200 From: Vadim Pasternak To: peda@axentia.se, wsa@the-dreams.de Cc: linux-i2c@vger.kernel.org, Vadim Pasternak Subject: [PATCH i2c-next v2 7/7] i2c: mux: mlxcpld: Add callback to notify mux creation completion Date: Fri, 22 Jan 2021 21:25:02 +0200 Message-Id: <20210122192502.17645-8-vadimp@nvidia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20210122192502.17645-1-vadimp@nvidia.com> References: <20210122192502.17645-1-vadimp@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Add notification to inform caller that mux objects array has been created. It allows to user, invoked platform device registration for "i2c-mux-mlxcpld" driver, to be notified that mux infrastructure is available, and thus some devices could be connected to this infrastructure. Signed-off-by: Vadim Pasternak --- drivers/i2c/muxes/i2c-mux-mlxcpld.c | 4 ++++ include/linux/platform_data/mlxcpld.h | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c index 7b37d59dc23b..5e0b910790ce 100644 --- a/drivers/i2c/muxes/i2c-mux-mlxcpld.c +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -162,6 +162,10 @@ static int mlxcpld_mux_probe(struct platform_device *pdev) goto virt_reg_failed; } + /* Notify caller when all channels' adapters are created. */ + if (pdata->completion_notify) + pdata->completion_notify(pdata->handle, muxc->parent, muxc->adapter); + return 0; virt_reg_failed: diff --git a/include/linux/platform_data/mlxcpld.h b/include/linux/platform_data/mlxcpld.h index a7bee798d991..d7610b528856 100644 --- a/include/linux/platform_data/mlxcpld.h +++ b/include/linux/platform_data/mlxcpld.h @@ -15,12 +15,17 @@ * @num_adaps - number of adapters * @sel_reg_addr - mux select register offset in CPLD space * @reg_size: register size in bytes + * @handle: handle to be passed by callback + * @completion_notify: callback to notify when all the adapters are created */ struct mlxcpld_mux_plat_data { int *chan_ids; int num_adaps; int sel_reg_addr; u8 reg_size; + void *handle; + int (*completion_notify)(void *handle, struct i2c_adapter *parent, + struct i2c_adapter *adapters[]); }; #endif /* _LINUX_I2C_MLXCPLD_H */