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=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, 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 794FCC5CFFE for ; Mon, 10 Dec 2018 21:03:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 461C82084C for ; Mon, 10 Dec 2018 21:03:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 461C82084C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.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 S1729926AbeLJVDR (ORCPT ); Mon, 10 Dec 2018 16:03:17 -0500 Received: from sauhun.de ([88.99.104.3]:36676 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727967AbeLJVDP (ORCPT ); Mon, 10 Dec 2018 16:03:15 -0500 Received: from localhost (p54B335CF.dip0.t-ipconnect.de [84.179.53.207]) by pokefinder.org (Postfix) with ESMTPSA id BC9124C2010; Mon, 10 Dec 2018 22:03:13 +0100 (CET) From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Hans de Goede , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Wolfram Sang , Wolfram Sang , linux-kernel@vger.kernel.org Subject: [RFC/RFT 01/10] i2c: add 'is_suspended' flag for i2c adapters Date: Mon, 10 Dec 2018 22:02:59 +0100 Message-Id: <20181210210310.12677-2-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20181210210310.12677-1-wsa+renesas@sang-engineering.com> References: <20181210210310.12677-1-wsa+renesas@sang-engineering.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some drivers open code handling of suspended adapters. It should be handled by the core, though, to ensure generic handling. This patch adds the flag and an accessor function. Signed-off-by: Wolfram Sang --- drivers/i2c/i2c-core-base.c | 1 + include/linux/i2c.h | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 28460f6a60cc..9f89e258c8ff 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -1232,6 +1232,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap) if (!adap->lock_ops) adap->lock_ops = &i2c_adapter_lock_ops; + adap->is_suspended = false; rt_mutex_init(&adap->bus_lock); rt_mutex_init(&adap->mux_lock); mutex_init(&adap->userspace_clients_lock); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 65b4eaed1d96..9852038ee3a7 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -680,6 +680,7 @@ struct i2c_adapter { int timeout; /* in jiffies */ int retries; struct device dev; /* the adapter device */ + unsigned int is_suspended:1; /* owned by the I2C core */ int nr; char name[48]; @@ -762,6 +763,14 @@ i2c_unlock_bus(struct i2c_adapter *adapter, unsigned int flags) adapter->lock_ops->unlock_bus(adapter, flags); } +static inline void i2c_mark_adapter_suspended(struct i2c_adapter *adap, + bool suspended) +{ + i2c_lock_bus(adap, I2C_LOCK_ROOT_ADAPTER); + adap->is_suspended = suspended; + i2c_unlock_bus(adap, I2C_LOCK_ROOT_ADAPTER); +} + /*flags for the client struct: */ #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ -- 2.11.0