From patchwork Fri May 13 12:43:21 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mohan Pallaka X-Patchwork-Id: 782902 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4DCiJXa014837 for ; Fri, 13 May 2011 12:44:19 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759213Ab1EMMnp (ORCPT ); Fri, 13 May 2011 08:43:45 -0400 Received: from wolverine02.qualcomm.com ([199.106.114.251]:43103 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759150Ab1EMMnm (ORCPT ); Fri, 13 May 2011 08:43:42 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,6344"; a="91005141" Received: from pdmz-css-vrrp.qualcomm.com (HELO mostmsg01.qualcomm.com) ([199.106.114.130]) by wolverine02.qualcomm.com with ESMTP/TLS/ADH-AES256-SHA; 13 May 2011 05:43:42 -0700 Received: from mpallaka-linux.in.qualcomm.com (pdmz-snip-v218.qualcomm.com [192.168.218.1]) by mostmsg01.qualcomm.com (Postfix) with ESMTPA id 10F3F10004D5; Fri, 13 May 2011 05:43:20 -0700 (PDT) From: Mohan Pallaka To: dmitry.torokhov@gmail.com Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.intradead.org, linux-input@vger.kernel.org, linux-i2c@vger.kernel.org, rmk@dyn-67.arm.linux.org.uk, Mohan Pallaka Subject: [PATCH 1/2] pwm: Add __weak attributed functions for pwm operations Date: Fri, 13 May 2011 18:13:21 +0530 Message-Id: <1305290602-29859-2-git-send-email-mpallaka@codeaurora.org> X-Mailer: git-send-email 1.7.1.1 In-Reply-To: <1305290602-29859-1-git-send-email-mpallaka@codeaurora.org> References: <1305290602-29859-1-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 (demeter2.kernel.org [140.211.167.43]); Fri, 13 May 2011 12:44:19 +0000 (UTC) For chip drivers that support both pwm and non-pwm modes would encounter compilation errors if the platform doesn't have support for pwm though the chip is programmed to work in non-pwm mode. Add __weak attributed pwm functions to avoid compilation issues in these scenarios. Change-Id: Ia507bf659d4d67d71f135012e7d919aca6c45c6c Signed-off-by: Mohan Pallaka --- include/linux/pwm.h | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 7c77575..e0c8c3f 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -3,29 +3,31 @@ 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); /* * 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); /* * pwm_enable - start a PWM output toggling */ -int pwm_enable(struct pwm_device *pwm); +int __weak pwm_enable(struct pwm_device *pwm); /* * 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 */