From patchwork Mon Mar 7 11:09:41 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mohan Pallaka X-Patchwork-Id: 615411 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p27BAUWN008977 for ; Mon, 7 Mar 2011 11:10:30 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755700Ab1CGLJ7 (ORCPT ); Mon, 7 Mar 2011 06:09:59 -0500 Received: from wolverine02.qualcomm.com ([199.106.114.251]:22619 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754598Ab1CGLJ4 (ORCPT ); Mon, 7 Mar 2011 06:09:56 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6277"; a="78208515" Received: from pdmz-ns-mip.qualcomm.com (HELO mostmsg01.qualcomm.com) ([199.106.114.10]) by wolverine02.qualcomm.com with ESMTP/TLS/ADH-AES256-SHA; 07 Mar 2011 03:09:56 -0800 Received: from mpallaka-linux.in.qualcomm.com (pdmz-snip-v218.qualcomm.com [192.168.218.1]) by mostmsg01.qualcomm.com (Postfix) with ESMTPA id 4405710004B1; Mon, 7 Mar 2011 03:09:40 -0800 (PST) From: Mohan Pallaka To: linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mohan Pallaka Subject: [PATCH 1/2] pwm: Add __weak attributed functions for pwm operations Date: Mon, 7 Mar 2011 16:39:41 +0530 Message-Id: <1299496182-26177-2-git-send-email-mpallaka@codeaurora.org> X-Mailer: git-send-email 1.7.1.1 In-Reply-To: <1299496182-26177-1-git-send-email-mpallaka@codeaurora.org> References: <1299496182-26177-1-git-send-email-mpallaka@codeaurora.org> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 07 Mar 2011 11:10:30 +0000 (UTC) diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 7c77575..3a8c3df 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -3,29 +3,40 @@ struct pwm_device; +/* Add __weak functions to support PWM */ + /* * pwm_request - request a PWM device */ -struct pwm_device *pwm_request(int pwm_id, const char *label); +struct pwm_device __weak *pwm_request(int pwm_id, const char *label) +{ + return NULL; +} /* * pwm_free - free a PWM device */ -void pwm_free(struct pwm_device *pwm); +void __weak pwm_free(struct pwm_device *pwm) { } /* * pwm_config - change a PWM device configuration */ -int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns); +int __weak pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) +{ + return -ENODEV; +} /* * pwm_enable - start a PWM output toggling */ -int pwm_enable(struct pwm_device *pwm); +int __weak pwm_enable(struct pwm_device *pwm) +{ + return -EINVAL; +} /* * pwm_disable - stop a PWM output toggling */ -void pwm_disable(struct pwm_device *pwm); +void __weak pwm_disable(struct pwm_device *pwm) { } #endif /* __LINUX_PWM_H */