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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 2993DC83004 for ; Wed, 29 Apr 2020 22:19:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0873E20757 for ; Wed, 29 Apr 2020 22:19:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="Z/PwLy3o" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726852AbgD2WS7 (ORCPT ); Wed, 29 Apr 2020 18:18:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726481AbgD2WS7 (ORCPT ); Wed, 29 Apr 2020 18:18:59 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29877C03C1AE; Wed, 29 Apr 2020 15:18:59 -0700 (PDT) Received: from ssl.serverraum.org (web.serverraum.org [172.16.0.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id CC72422F54; Thu, 30 Apr 2020 00:18:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1588198733; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OmNmiJrBqjSomX4a3GYQTKJyBa1w0mCqW3xG6X4r7JU=; b=Z/PwLy3ofPJI0xZH8IT5HibD+o80mve3lOqDxmcoLl5fAWYxiphkS3L+FlMZ3hwjqkPVXe FWyxmaG79Gwm3M+Y76olNlSWLCYjY+suQcs/NAmXlgNRFpGqjE3p9qgeG7IWOdSSjMV0EB tuVu73gv8gmi36GFiF4+cMEP6WC8huQ= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 30 Apr 2020 00:18:48 +0200 From: Michael Walle To: Lee Jones Cc: Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Thierry Reding , =?UTF-8?Q?Uwe_Kleine-K=C3=B6nig?= , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v3 03/16] mfd: mfd-core: match device tree node against reg property In-Reply-To: <20200423174543.17161-4-michael@walle.cc> References: <20200423174543.17161-1-michael@walle.cc> <20200423174543.17161-4-michael@walle.cc> Message-ID: <67e90dafd67c285158c2c6f67f92edb7@walle.cc> X-Sender: michael@walle.cc User-Agent: Roundcube Webmail/1.3.10 X-Spamd-Bar: + X-Rspamd-Server: web X-Rspamd-Queue-Id: CC72422F54 X-Spamd-Result: default: False [1.40 / 15.00]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_RCPT(0.00)[dt]; MIME_GOOD(-0.10)[text/plain]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_TWELVE(0.00)[24]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[linux.intel.com,linaro.org,baylibre.com,kernel.org,suse.com,roeck-us.net,gmail.com,pengutronix.de,linux-watchdog.org,nxp.com,linutronix.de,lakedaemon.net,linuxfoundation.org,vger.kernel.org,lists.infradead.org]; MID_RHS_MATCH_FROM(0.00)[]; SUSPICIOUS_RECIPS(1.50)[] Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Hi Lee, Am 2020-04-23 19:45, schrieb Michael Walle: > There might be multiple children with the device tree compatible, for > example if a MFD has multiple instances of the same function. In this > case only the first is matched and the other children get a wrong > of_node reference. > Add a new option to match also against the unit address of the child > node. Additonally, a new helper OF_MFD_CELL_REG is added. Do you think this is feasible? I guess this is the biggest uncertainty for me at the moment in this patch series. -michael > > Signed-off-by: Michael Walle > --- > drivers/mfd/mfd-core.c | 29 ++++++++++++++++++++--------- > include/linux/mfd/core.h | 26 ++++++++++++++++++++------ > 2 files changed, 40 insertions(+), 15 deletions(-) > > diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c > index e735565969b3..4ecb376338f7 100644 > --- a/drivers/mfd/mfd-core.c > +++ b/drivers/mfd/mfd-core.c > @@ -117,6 +117,7 @@ static int mfd_add_device(struct device *parent, > int id, > struct device_node *np = NULL; > int ret = -ENOMEM; > int platform_id; > + u32 of_reg; > int r; > > if (id == PLATFORM_DEVID_AUTO) > @@ -151,16 +152,26 @@ static int mfd_add_device(struct device *parent, > int id, > > if (parent->of_node && cell->of_compatible) { > for_each_child_of_node(parent->of_node, np) { > - if (of_device_is_compatible(np, cell->of_compatible)) { > - if (!of_device_is_available(np)) { > - /* Ignore disabled devices error free */ > - ret = 0; > - goto fail_alias; > - } > - pdev->dev.of_node = np; > - pdev->dev.fwnode = &np->fwnode; > - break; > + if (!of_device_is_compatible(np, cell->of_compatible)) > + continue; > + > + /* also match the unit address if set */ > + if (cell->of_reg & MFD_OF_REG_VALID) { > + if (of_property_read_u32(np, "reg", &of_reg)) > + continue; > + if ((cell->of_reg & MFD_OF_REG_MASK) != of_reg) > + continue; > } > + > + if (!of_device_is_available(np)) { > + /* Ignore disabled devices error free */ > + ret = 0; > + goto fail_alias; > + } > + > + pdev->dev.of_node = np; > + pdev->dev.fwnode = &np->fwnode; > + break; > } > } > > diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h > index d01d1299e49d..c2c0ad6b14f3 100644 > --- a/include/linux/mfd/core.h > +++ b/include/linux/mfd/core.h > @@ -13,8 +13,11 @@ > #include > > #define MFD_RES_SIZE(arr) (sizeof(arr) / sizeof(struct resource)) > +#define MFD_OF_REG_VALID BIT(31) > +#define MFD_OF_REG_MASK GENMASK(30, 0) > > -#define MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, > _match)\ > +#define MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, \ > + _of_reg, _match) \ > { \ > .name = (_name), \ > .resources = (_res), \ > @@ -22,24 +25,32 @@ > .platform_data = (_pdata), \ > .pdata_size = (_pdsize), \ > .of_compatible = (_compat), \ > + .of_reg = (_of_reg), \ > .acpi_match = (_match), \ > .id = (_id), \ > } > > +#define OF_MFD_CELL_REG(_name, _res, _pdata, _pdsize, _id, _compat, \ > + _of_reg) \ > + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, \ > + ((_of_reg) | MFD_OF_REG_VALID), NULL) \ > + > #define OF_MFD_CELL(_name, _res, _pdata, _pdsize,_id, _compat) \ > - MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, NULL) \ > + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, \ > + 0, NULL) \ > > #define ACPI_MFD_CELL(_name, _res, _pdata, _pdsize, _id, _match) \ > - MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, _match) \ > + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, \ > + _match) \ > > #define MFD_CELL_BASIC(_name, _res, _pdata, _pdsize, _id) \ > - MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, NULL) \ > + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, NULL) \ > > #define MFD_CELL_RES(_name, _res) \ > - MFD_CELL_ALL(_name, _res, NULL, 0, 0, NULL, NULL) \ > + MFD_CELL_ALL(_name, _res, NULL, 0, 0, NULL, 0, NULL) \ > > #define MFD_CELL_NAME(_name) \ > - MFD_CELL_ALL(_name, NULL, NULL, 0, 0, NULL, NULL) \ > + MFD_CELL_ALL(_name, NULL, NULL, 0, 0, NULL, 0, NULL) \ > > struct irq_domain; > struct property_entry; > @@ -78,6 +89,9 @@ struct mfd_cell { > */ > const char *of_compatible; > > + /* matching the reg property if set */ > + unsigned int of_reg; > + > /* Matches ACPI */ > const struct mfd_cell_acpi_match *acpi_match;