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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 A070CC4727E for ; Wed, 30 Sep 2020 11:59:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F6F920888 for ; Wed, 30 Sep 2020 11:59:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601467155; bh=j7TyWiQ46A8cgocAOXeM5f1+0eI0qyuI4IcopJ3Xq28=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=Tj+xePUPmJMaIit9YsoTcZzHWaccsDrvVJDcc6DT0Jf5yy9bOLfzzY4hTWrhfW/CQ C9hDyW0k8qJ79DwX7+/WLmxitW/TqseyD31zN56FwsozIBOZdErQLDBi8fsecH7Pyv 0Xzp1wbwtZ7O1lLsil7CKcs4ItI4Ch5zcvEU6FZk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729617AbgI3L7O (ORCPT ); Wed, 30 Sep 2020 07:59:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:48930 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727997AbgI3L7O (ORCPT ); Wed, 30 Sep 2020 07:59:14 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3967A2075F; Wed, 30 Sep 2020 11:59:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601467152; bh=j7TyWiQ46A8cgocAOXeM5f1+0eI0qyuI4IcopJ3Xq28=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=i8situxT7lHaqrW5D0ijbVCB0KIfk7XFB0RvE6AjJrbs5RQx3g7M6s91yj5s8zvx2 noAxcYVL7Uks2NrVIGmIHd18W2m90leiGA2lHQHXx2cR+U9MlQs7EYqahR89rQXa6j dluo5/yAcjNy0jJjOzht9zpX+qLp3jcb0L87T61E= Date: Wed, 30 Sep 2020 13:59:15 +0200 From: Greg KH To: Srinivas Kandagatla Cc: broonie@kernel.org, rafael@kernel.org, lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.com, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, srivasam@codeaurora.org, rohitkr@codeaurora.org Subject: Re: [PATCH v2 1/2] regmap: add support to regmap_field_bulk_alloc/free apis Message-ID: <20200930115915.GB1611809@kroah.com> References: <20200925164856.10315-1-srinivas.kandagatla@linaro.org> <20200925164856.10315-2-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200925164856.10315-2-srinivas.kandagatla@linaro.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 25, 2020 at 05:48:55PM +0100, Srinivas Kandagatla wrote: > Usage of regmap_field_alloc becomes much overhead when number of fields > exceed more than 3. > QCOM LPASS driver has extensively converted to use regmap_fields. > > Using new bulk api to allocate fields makes it much more cleaner code to read! > > Signed-off-by: Srinivas Kandagatla > Tested-by: Srinivasa Rao Mandadapu > --- > drivers/base/regmap/regmap.c | 100 +++++++++++++++++++++++++++++++++++ > include/linux/regmap.h | 11 ++++ > 2 files changed, 111 insertions(+) > > diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c > index aec3f26bf711..8d6aedce666d 100644 > --- a/drivers/base/regmap/regmap.c > +++ b/drivers/base/regmap/regmap.c > @@ -1270,6 +1270,106 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev, > } > EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); > > + > +/** > + * regmap_field_bulk_alloc() - Allocate and initialise a bulk register field. > + * > + * @regmap: regmap bank in which this register field is located. > + * @rm_field: regmap register fields within the bank. > + * @reg_field: Register fields within the bank. > + * @num_fields: Number of register fields. > + * > + * The return value will be an -ENOMEM on error or zero for success. > + * Newly allocated regmap_fields should be freed by calling > + * regmap_field_bulk_free() > + */ > +int regmap_field_bulk_alloc(struct regmap *regmap, > + struct regmap_field **rm_field, > + struct reg_field *reg_field, > + int num_fields) > +{ > + struct regmap_field *rf; > + int i; > + > + rf = kcalloc(num_fields, sizeof(*rf), GFP_KERNEL); > + if (!rf) > + return -ENOMEM; > + > + for (i = 0; i < num_fields; i++) { > + regmap_field_init(&rf[i], regmap, reg_field[i]); > + rm_field[i] = &rf[i]; > + } > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(regmap_field_bulk_alloc); > + > +/** > + * devm_regmap_field_bulk_alloc() - Allocate and initialise a bulk register > + * fields. > + * > + * @dev: Device that will be interacted with > + * @regmap: regmap bank in which this register field is located. > + * @rm_field: regmap register fields within the bank. > + * @reg_field: Register fields within the bank. > + * @num_fields: Number of register fields. > + * > + * The return value will be an -ENOMEM on error or zero for success. > + * Newly allocated regmap_fields will be automatically freed by the > + * device management code. > + */ > +int devm_regmap_field_bulk_alloc(struct device *dev, > + struct regmap *regmap, > + struct regmap_field **rm_field, > + struct reg_field *reg_field, > + int num_fields) > +{ > + struct regmap_field *rf; > + int i; > + > + rf = devm_kcalloc(dev, num_fields, sizeof(*rf), GFP_KERNEL); > + if (!rf) > + return -ENOMEM; > + > + for (i = 0; i < num_fields; i++) { > + regmap_field_init(&rf[i], regmap, reg_field[i]); > + rm_field[i] = &rf[i]; > + } > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_alloc); > + > +/** > + * regmap_field_bulk_free() - Free register field allocated using > + * regmap_field_bulk_alloc. > + * > + * @field: regmap fields which should be freed. > + */ > +void regmap_field_bulk_free(struct regmap_field *field) > +{ > + kfree(field); > +} > +EXPORT_SYMBOL_GPL(regmap_field_bulk_free); > + > +/** > + * devm_regmap_field_bulk_free() - Free a bulk register field allocated using > + * devm_regmap_field_bulk_alloc. > + * > + * @dev: Device that will be interacted with > + * @field: regmap field which should be freed. > + * > + * Free register field allocated using devm_regmap_field_bulk_alloc(). Usually > + * drivers need not call this function, as the memory allocated via devm > + * will be freed as per device-driver life-cycle. > + */ > +void devm_regmap_field_bulk_free(struct device *dev, > + struct regmap_field *field) > +{ > + devm_kfree(dev, field); > +} > +EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_free); > + > /** > * devm_regmap_field_free() - Free a register field allocated using > * devm_regmap_field_alloc. > diff --git a/include/linux/regmap.h b/include/linux/regmap.h > index 0c49d59168b5..a35ec0a0d6e0 100644 > --- a/include/linux/regmap.h > +++ b/include/linux/regmap.h > @@ -1189,6 +1189,17 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev, > struct regmap *regmap, struct reg_field reg_field); > void devm_regmap_field_free(struct device *dev, struct regmap_field *field); > > +int regmap_field_bulk_alloc(struct regmap *regmap, > + struct regmap_field **rm_field, > + struct reg_field *reg_field, > + int num_fields); > +void regmap_field_bulk_free(struct regmap_field *field); > +int devm_regmap_field_bulk_alloc(struct device *dev, struct regmap *regmap, > + struct regmap_field **field, > + struct reg_field *reg_field, int num_fields); > +void devm_regmap_field_bulk_free(struct device *dev, > + struct regmap_field *field); > + You only have a patch that uses these last two functions, so why add all 4? We don't add infrastructure to the kernel without users. thanks, greg k-h