From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753346AbeB0N1C (ORCPT ); Tue, 27 Feb 2018 08:27:02 -0500 Received: from mail-co1nam03on0047.outbound.protection.outlook.com ([104.47.40.47]:14560 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753239AbeB0N0s (ORCPT ); Tue, 27 Feb 2018 08:26:48 -0500 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=George.Cherian@cavium.com; From: George Cherian To: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Cc: wsa@the-dreams.de, George Cherian , Kamlakant Patel Subject: [PATCH 3/3] i2c: xlp9xx: Add support for SMBAlert Date: Tue, 27 Feb 2018 13:26:20 +0000 Message-Id: <1519737980-27997-3-git-send-email-george.cherian@cavium.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1519737980-27997-1-git-send-email-george.cherian@cavium.com> References: <1519737980-27997-1-git-send-email-george.cherian@cavium.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [111.93.218.67] X-ClientProxiedBy: BM1PR01CA0086.INDPRD01.PROD.OUTLOOK.COM (10.174.208.154) To BY2PR07MB2328.namprd07.prod.outlook.com (10.166.114.142) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 53b38eb2-40e5-4e99-deca-08d57de5bfbc X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(2017052603307)(7153060)(7193020);SRVR:BY2PR07MB2328; 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The second interrupt is parsed to use for SMBus alert. The first interrupt is the i2c controller main interrupt. Signed-off-by: Kamlakant Patel Signed-off-by: George Cherian --- drivers/i2c/busses/i2c-xlp9xx.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c index eb8913e..9462eab 100644 --- a/drivers/i2c/busses/i2c-xlp9xx.c +++ b/drivers/i2c/busses/i2c-xlp9xx.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -84,6 +85,8 @@ struct xlp9xx_i2c_dev { struct device *dev; struct i2c_adapter adapter; struct completion msg_complete; + struct i2c_smbus_alert_setup alert_data; + struct i2c_client *ara; int irq; bool msg_read; bool len_recv; @@ -447,6 +450,21 @@ static int xlp9xx_i2c_get_frequency(struct platform_device *pdev, return 0; } +static int xlp9xx_i2c_smbus_setup(struct xlp9xx_i2c_dev *priv, + struct platform_device *pdev) +{ + if (!priv->alert_data.irq) + return -EINVAL; + + priv->alert_data.alert_edge_triggered = 0; + + priv->ara = i2c_setup_smbus_alert(&priv->adapter, &priv->alert_data); + if (!priv->ara) + return -ENODEV; + + return 0; +} + static int xlp9xx_i2c_probe(struct platform_device *pdev) { struct xlp9xx_i2c_dev *priv; @@ -467,6 +485,10 @@ static int xlp9xx_i2c_probe(struct platform_device *pdev) dev_err(&pdev->dev, "invalid irq!\n"); return priv->irq; } + /* SMBAlert irq */ + priv->alert_data.irq = platform_get_irq(pdev, 1); + if (priv->alert_data.irq <= 0) + priv->alert_data.irq = 0; xlp9xx_i2c_get_frequency(pdev, priv); xlp9xx_i2c_init(priv); @@ -493,6 +515,10 @@ static int xlp9xx_i2c_probe(struct platform_device *pdev) if (err) return err; + err = xlp9xx_i2c_smbus_setup(priv, pdev); + if (err) + dev_info(&pdev->dev, "No active SMBus alert %d\n", err); + platform_set_drvdata(pdev, priv); dev_dbg(&pdev->dev, "I2C bus:%d added\n", priv->adapter.nr); -- 2.1.4