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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 56B5FC33CB1 for ; Fri, 17 Jan 2020 11:17:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 31FE520730 for ; Fri, 17 Jan 2020 11:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726979AbgAQLRa convert rfc822-to-8bit (ORCPT ); Fri, 17 Jan 2020 06:17:30 -0500 Received: from mx1.unisoc.com ([222.66.158.135]:34211 "EHLO SHSQR01.spreadtrum.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726343AbgAQLRa (ORCPT ); Fri, 17 Jan 2020 06:17:30 -0500 Received: from ig2.spreadtrum.com (bjmbx01.spreadtrum.com [10.0.64.7]) by SHSQR01.spreadtrum.com with ESMTPS id 00HBGQni070418 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO); Fri, 17 Jan 2020 19:16:27 +0800 (CST) (envelope-from Orson.Zhai@unisoc.com) Received: from localhost (10.0.74.130) by BJMBX01.spreadtrum.com (10.0.64.7) with Microsoft SMTP Server (TLS) id 15.0.847.32; Fri, 17 Jan 2020 19:17:04 +0800 From: Orson Zhai To: Lee Jones , Arnd Bergmann CC: , , , Orson Zhai Subject: [PATCH v3] mfd: syscon: Add arguments support for syscon reference Date: Fri, 17 Jan 2020 19:16:52 +0800 Message-ID: <1579259812-27186-1-git-send-email-orson.zhai@unisoc.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Originating-IP: [10.0.74.130] X-ClientProxiedBy: shcas04.spreadtrum.com (10.29.35.89) To BJMBX01.spreadtrum.com (10.0.64.7) Content-Transfer-Encoding: 8BIT X-MAIL: SHSQR01.spreadtrum.com 00HBGQni070418 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There are a lot of similar global registers being used across multiple SoCs from Unisoc. But most of these registers are assigned with different offset for different SoCs. It is hard to handle all of them in an all-in-one kernel image. Add a helper function to get regmap with arguments where we could put some extra information such as the offset value. Signed-off-by: Orson Zhai Tested-by: Baolin Wang Reviewed-by: Arnd Bergmann Acked-by: Lee Jones --- V3 Change: Rebase on latest kernel v5.5-rc6 for Lee. drivers/mfd/syscon.c | 29 +++++++++++++++++++++++++++++ include/linux/mfd/syscon.h | 14 ++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index e22197c..2918b05 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -224,6 +224,35 @@ struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np, } EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle); +struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np, + const char *property, + int arg_count, + unsigned int *out_args) +{ + struct device_node *syscon_np; + struct of_phandle_args args; + struct regmap *regmap; + unsigned int index; + int rc; + + rc = of_parse_phandle_with_fixed_args(np, property, arg_count, + 0, &args); + if (rc) + return ERR_PTR(rc); + + syscon_np = args.np; + if (!syscon_np) + return ERR_PTR(-ENODEV); + + regmap = syscon_node_to_regmap(syscon_np); + for (index = 0; index < arg_count; index++) + out_args[index] = args.args[index]; + of_node_put(syscon_np); + + return regmap; +} +EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle_args); + static int syscon_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h index 112dc66..714cab1 100644 --- a/include/linux/mfd/syscon.h +++ b/include/linux/mfd/syscon.h @@ -23,6 +23,11 @@ extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s); extern struct regmap *syscon_regmap_lookup_by_phandle( struct device_node *np, const char *property); +extern struct regmap *syscon_regmap_lookup_by_phandle_args( + struct device_node *np, + const char *property, + int arg_count, + unsigned int *out_args); #else static inline struct regmap *device_node_to_regmap(struct device_node *np) { @@ -45,6 +50,15 @@ static inline struct regmap *syscon_regmap_lookup_by_phandle( { return ERR_PTR(-ENOTSUPP); } + +static struct regmap *syscon_regmap_lookup_by_phandle_args( + struct device_node *np, + const char *property, + int arg_count, + unsigned int *out_args) +{ + return ERR_PTR(-ENOTSUPP); +} #endif #endif /* __LINUX_MFD_SYSCON_H__ */ -- 2.7.4 ________________________________ This email (including its attachments) is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. 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