From patchwork Wed Jul 19 02:14:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Phil Reid X-Patchwork-Id: 790707 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xC0w23TWZz9sRg for ; Wed, 19 Jul 2017 12:14:26 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752720AbdGSCOY (ORCPT ); Tue, 18 Jul 2017 22:14:24 -0400 Received: from anchovy1.45ru.net.au ([203.30.46.145]:36130 "EHLO anchovy.45ru.net.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752182AbdGSCOW (ORCPT ); Tue, 18 Jul 2017 22:14:22 -0400 Received: (qmail 28091 invoked by uid 5089); 19 Jul 2017 02:14:20 -0000 Received: by simscan 1.2.0 ppid: 27955, pid: 27958, t: 0.0725s scanners: regex: 1.2.0 attach: 1.2.0 clamav: 0.88.3/m:40/d:1950 X-RBL: $rbltext Received: from unknown (HELO preid-centos7.electromag.com.au) (preid@electromag.com.au@203.59.230.133) by anchovy1.45ru.net.au with ESMTPA; 19 Jul 2017 02:14:19 -0000 Received: by preid-centos7.electromag.com.au (Postfix, from userid 1000) id 2C539330E6576; Wed, 19 Jul 2017 10:14:15 +0800 (AWST) From: Phil Reid To: wsa@the-dreams.de, robh+dt@kernel.org, mark.rutland@arm.com, sre@kernel.org, jdelvare@suse.com, jglauber@cavium.com, david.daney@cavium.com, peda@axentia.se, preid@electromag.com.au, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, benjamin.tissoires@redhat.com Subject: [PATCH v9 2/9] i2c: i2c-smbus: add of_i2c_setup_smbus_alert Date: Wed, 19 Jul 2017 10:14:04 +0800 Message-Id: <1500430451-43858-3-git-send-email-preid@electromag.com.au> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1500430451-43858-1-git-send-email-preid@electromag.com.au> References: <1500430451-43858-1-git-send-email-preid@electromag.com.au> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This commit adds of_i2c_setup_smbus_alert which allows the smbalert driver to be attached to an i2c adapter via the device tree. Signed-off-by: Phil Reid Acked-by: Rob Herring --- Documentation/devicetree/bindings/i2c/i2c.txt | 4 ++-- drivers/i2c/i2c-smbus.c | 32 ++++++++++++++++++++++++++- include/linux/i2c-smbus.h | 9 ++++++++ 3 files changed, 42 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index cee9d50..1126398 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -59,8 +59,8 @@ wants to support one of the below features, it should adapt the bindings below. interrupts used by the device. - interrupt-names - "irq" and "wakeup" names are recognized by I2C core, other names are - left to individual drivers. + "irq", "wakeup" and "smbus_alert" names are recognized by I2C core, + other names are left to individual drivers. - host-notify device uses SMBus host notify protocol instead of interrupt line. diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index d4af270..a34f41d 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -139,7 +140,14 @@ static int smbalert_probe(struct i2c_client *ara, if (!alert) return -ENOMEM; - irq = setup->irq; + if (setup) { + irq = setup->irq; + } else { + irq = of_irq_get_byname(adapter->dev.of_node, "smbus_alert"); + if (irq <= 0) + return irq; + } + INIT_WORK(&alert->alert, smbalert_work); alert->ara = ara; @@ -214,6 +222,28 @@ struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter, } EXPORT_SYMBOL_GPL(i2c_setup_smbus_alert); +#if IS_ENABLED(CONFIG_OF) +int of_i2c_setup_smbus_alert(struct i2c_adapter *adapter) +{ + struct i2c_client *client; + int irq; + + irq = of_property_match_string(adapter->dev.of_node, "interrupt-names", + "smbus_alert"); + if (irq == -EINVAL || irq == -ENODATA) + return 0; + else if (irq < 0) + return irq; + + client = i2c_setup_smbus_alert(adapter, NULL); + if (!client) + return -ENODEV; + + return 0; +} +EXPORT_SYMBOL_GPL(of_i2c_setup_smbus_alert); +#endif + /** * i2c_handle_smbus_alert - Handle an SMBus alert * @ara: the ARA client on the relevant adapter diff --git a/include/linux/i2c-smbus.h b/include/linux/i2c-smbus.h index 19efbd1..fb0e040 100644 --- a/include/linux/i2c-smbus.h +++ b/include/linux/i2c-smbus.h @@ -49,4 +49,13 @@ struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter, struct i2c_smbus_alert_setup *setup); int i2c_handle_smbus_alert(struct i2c_client *ara); +#if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF) +int of_i2c_setup_smbus_alert(struct i2c_adapter *adap); +#else +static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap) +{ + return 0; +} +#endif + #endif /* _LINUX_I2C_SMBUS_H */