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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 A5883C2BA19 for ; Mon, 13 Apr 2020 06:13:53 +0000 (UTC) Received: from vger.kernel.org (unknown [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 72CE220731 for ; Mon, 13 Apr 2020 06:13:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="GfNvBiCU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 72CE220731 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727041AbgDMGNw (ORCPT ); Mon, 13 Apr 2020 02:13:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.18]:48228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726138AbgDMGNv (ORCPT ); Mon, 13 Apr 2020 02:13:51 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08AE8C0A3BE0 for ; Sun, 12 Apr 2020 23:13:51 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id r20so2425396pfh.9 for ; Sun, 12 Apr 2020 23:13:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=auYmqYDM1/7u1gkIGGIbmBahIPEKepRX3a1enGdJRB0=; b=GfNvBiCU+sLaDhQj5vqhY89ljMY161UZKuRt9Re6Y/GBvo2JDLMrrhESAhxdjjO9TU lIsFEmwW0ePezpzqA0OnE5XBEUfvoIr6xmDAkL5oaeRnbtjTWUXQY56b44y31pPp2eJQ tK5W7hcfkMqaRiEUXNgEMDYMBZDG6LLvjF7WYCVXNqR3eM2GkRE8nklbSuHoakYUQp9F SGJrLquh6/AE5XEGd+RSKBAamMNqA0ufyN3kXuP+zjbOYzcHJ14zEHpeJKCXVv6KBBie O8/ScfjK+QjC03jFFrBKGBpf2Dll0wjy4J/7JzMrLDdVzxiZg5E/47KVqH5UojsHkVb9 39Ag== 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:in-reply-to :references:in-reply-to:references; bh=auYmqYDM1/7u1gkIGGIbmBahIPEKepRX3a1enGdJRB0=; b=Rge83GOpzmsh52v4j9hgqGXI66g+lkxzqD68v1e3aU7YZX36L99reiVl1/A6ZknTVS mFpKbukEOpf/YeKeRI4xhgww3kRGuAqhU9v4twjgExJYByiCkKv2JWErBQ7JI2wjk3/O 4NAQbotspTIFScwzjgTyQSmFu+Uu7jv02i0CQdXMQwDFqvkpo41LETxZyS0HU1zbeh68 z+iilty8H3xL2b0C/RaWUuFLLbK8Dh8mt9hnNQzQhxUF/E5RxiEhzVJoBWypQfhOBdSo Lzf122I5LlNlTEDmUK5mdRcX7RyTJ+Jy0/fAaYyZ8e/I9Dk1iLGnjddIC9cHuj39pByi z0fg== X-Gm-Message-State: AGi0PuaHpj28OZejGJnpYo5FGb6azujHNJD2oar02vMMOUWmB0ToAkQF ObdttGlybdlODqqvoO6gGP4= X-Google-Smtp-Source: APiQypINZLNzv946Hr9wE7c05M2XXhdaivVmrXhiDb4R421ZtJN1W0rXxCq/iNf7IrAXfgcvku8Y6A== X-Received: by 2002:aa7:9f4a:: with SMTP id h10mr16559837pfr.234.1586758430610; Sun, 12 Apr 2020 23:13:50 -0700 (PDT) Received: from localhost.localdomain ([45.135.186.19]) by smtp.gmail.com with ESMTPSA id w5sm7712645pfw.154.2020.04.12.23.13.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Apr 2020 23:13:50 -0700 (PDT) From: Baolin Wang To: lee.jones@linaro.org, arnd@arndb.de, broonie@kernel.org Cc: baolin.wang7@gmail.com, orsonzhai@gmail.com, zhang.lyra@gmail.com, linux-kernel@vger.kernel.org Subject: [RFC PATCH v2 1/3] mfd: syscon: Support physical regmap bus Date: Mon, 13 Apr 2020 14:13:19 +0800 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some platforms such as Spreadtrum platform, define a special method to update bits of the registers instead of reading and writing, which means we should use a physical regmap bus to define the reg_update_bits() operation instead of the MMIO regmap bus. Thus add a new helper for the syscon driver to allow to register a physical regmap bus to support this new requirement. Signed-off-by: Baolin Wang --- drivers/mfd/syscon.c | 16 ++++++++++++++-- include/linux/mfd/syscon.h | 7 +++++++ 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index 3a97816d0cba..5de74e1b6634 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -24,6 +24,7 @@ #include static struct platform_driver syscon_driver; +static struct regmap_bus *syscon_phy_regmap_bus; static DEFINE_SPINLOCK(syscon_list_slock); static LIST_HEAD(syscon_list); @@ -106,14 +107,18 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk) syscon_config.val_bits = reg_io_width * 8; syscon_config.max_register = resource_size(&res) - reg_io_width; - regmap = regmap_init_mmio(NULL, base, &syscon_config); + if (syscon_phy_regmap_bus) + regmap = regmap_init(NULL, syscon_phy_regmap_bus, base, + &syscon_config); + else + regmap = regmap_init_mmio(NULL, base, &syscon_config); if (IS_ERR(regmap)) { pr_err("regmap init failed\n"); ret = PTR_ERR(regmap); goto err_regmap; } - if (check_clk) { + if (check_clk && !syscon_phy_regmap_bus) { clk = of_clk_get(np, 0); if (IS_ERR(clk)) { ret = PTR_ERR(clk); @@ -172,6 +177,13 @@ static struct regmap *device_node_get_regmap(struct device_node *np, return syscon->regmap; } +void syscon_register_phys_regmap_bus(struct regmap_bus *phy_regmap_bus) +{ + if (phy_regmap_bus) + syscon_phy_regmap_bus = phy_regmap_bus; +} +EXPORT_SYMBOL_GPL(syscon_register_phys_regmap_bus); + struct regmap *device_node_to_regmap(struct device_node *np) { return device_node_get_regmap(np, false); diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h index 7f20e9b502a5..fbc2a2f0f414 100644 --- a/include/linux/mfd/syscon.h +++ b/include/linux/mfd/syscon.h @@ -13,6 +13,7 @@ #include #include +#include struct device_node; @@ -28,6 +29,7 @@ extern struct regmap *syscon_regmap_lookup_by_phandle_args( const char *property, int arg_count, unsigned int *out_args); +extern void syscon_register_phys_regmap_bus(struct regmap_bus *phy_regmap_bus); #else static inline struct regmap *device_node_to_regmap(struct device_node *np) { @@ -59,6 +61,11 @@ static inline struct regmap *syscon_regmap_lookup_by_phandle_args( { return ERR_PTR(-ENOTSUPP); } + +static inline void +syscon_register_phys_regmap_bus(struct regmap_bus *phy_regmap_bus) +{ +} #endif #endif /* __LINUX_MFD_SYSCON_H__ */ -- 2.17.1