Received: by 2002:a05:6a10:af89:0:0:0:0 with SMTP id iu9csp4401403pxb; Tue, 25 Jan 2022 09:31:18 -0800 (PST) X-Google-Smtp-Source: ABdhPJyEX8Fpmr2Z98wUg6+1uSE9jk/Vv0J8F26pb7he+7/m50PjAG75RdaDPdPugqRtxBVxezjY X-Received: by 2002:a17:907:1c11:: with SMTP id nc17mr6543029ejc.308.1643131878006; Tue, 25 Jan 2022 09:31:18 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1643131878; cv=none; d=google.com; s=arc-20160816; b=hAxxAe1C5dR/ADHL6eVVV/l9xqByujywkPqCZ/m0eaJzsM1P1nnVs9q+Na1WQP56B7 AJ4b37MqdPj7zYKwOxWRfnUg1729DcSW/pyVEInq2JcwoiXkAHVuKKVZHz+x6ofmwnJ1 fT8m1cANThC4pzkYCZI6V1eI8oWyNs0nHMjuPYcSMMhzO0uygR1P6Uoj6wL+7iQtXgR6 DNmxA2JvxncRIyAA6I/3GiNvtk6lUM+L2BQhTXvy68axJR0vnkdCjBN/Q1dV1FaDgCgN 25qKrCWBe1ObPWZ4sY5EMkdKM0xzgqNJSWbv9VynaHtg6v2QBJEvMQVfrVUKezsajK4x 2WPA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=lz1f8SUG7KhQPN1Dw4bDnXAqX2iDXvkQCw31GBnUQRI=; b=g/r6FQ1OBLaiRPbua+0Y5VvRdlFLtiuE5V9EJ+EihkTvMv93HncfaoI1m+6bTvGshO 6IPABZJl7+XYM2CqMILbidkUGHxFA4wG/wZIERpJFoxU9LoJ8sBdE4Z8dPtEa1tsXmWo v+iYkkRqwgLT6pUYv+/4FSrZRirLGvxx9ei09CI6gkkFEwK7EbYRe7p4/PG/YcNRIspt OrII12sPOvVIHY0AMIhww2yrhxs5utGPWoL4YWD9ZjKXNXZhExDe6XIDv4Sbn8IbSP2M gyf8Yr53uVkcp9FSAGBcJ5f8kXSA6uy+4do9HbTXVGdkLp/jkVb5xXefHUUcaTJaQc5Z DZgg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=hisilicon.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id cs9si11250423ejc.5.2022.01.25.09.30.51; Tue, 25 Jan 2022 09:31:17 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=hisilicon.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347036AbiAYMyi (ORCPT + 99 others); Tue, 25 Jan 2022 07:54:38 -0500 Received: from szxga02-in.huawei.com ([45.249.212.188]:17809 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1384066AbiAYMuu (ORCPT ); Tue, 25 Jan 2022 07:50:50 -0500 Received: from canpemm500009.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Jjmrn0Nynz9sMV; Tue, 25 Jan 2022 20:49:29 +0800 (CST) Received: from localhost.localdomain (10.67.164.66) by canpemm500009.china.huawei.com (7.192.105.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Tue, 25 Jan 2022 20:50:48 +0800 From: Yicong Yang To: , , , , , CC: , , Subject: [PATCH 0/2] Add I2C bus recovery support on Kunpeng 920/930 Date: Tue, 25 Jan 2022 20:49:28 +0800 Message-ID: <20220125124930.50369-1-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.67.164.66] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To canpemm500009.china.huawei.com (7.192.105.203) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series adds the I2C bus recovery support on Kunpeng 920/930. We're using HiSilicon I2C controller on Kunpeng 930 and Designware I2C controller on Kunpeng 920. For both platform, the SCL/SDA pins are multiplexed with GPIOs. Both driver use generic GPIO recovery method and we need to switch the pin mutiplexing before/after the recovery process. We use ACPI method to help on the pin mux switching which is also introduced in this series. Yicong Yang (2): i2c: hisi: Add generic GPIO bus recovery support i2c: designware: Add ACPI assisted recovery support drivers/i2c/busses/i2c-designware-core.h | 2 + drivers/i2c/busses/i2c-designware-master.c | 84 ++++++++++++++++++++- drivers/i2c/busses/i2c-designware-platdrv.c | 6 +- drivers/i2c/busses/i2c-hisi.c | 78 +++++++++++++++++++ 4 files changed, 164 insertions(+), 6 deletions(-) -- 2.24.0