From patchwork Fri May 20 04:59:44 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mohan Pallaka X-Patchwork-Id: 801982 Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4K5253U028623 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 20 May 2011 05:02:26 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by bombadil.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QNHp3-0001uv-V1; Fri, 20 May 2011 05:00:26 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QNHp2-0003ct-4t; Fri, 20 May 2011 05:00:24 +0000 Received: from wolverine01.qualcomm.com ([199.106.114.254]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QNHow-0003ca-Bv for linux-arm-kernel@lists.infradead.org; Fri, 20 May 2011 05:00:19 +0000 X-IronPort-AV: E=McAfee;i="5400,1158,6351"; a="92430695" Received: from pdmz-css-vrrp.qualcomm.com (HELO mostmsg01.qualcomm.com) ([199.106.114.130]) by wolverine01.qualcomm.com with ESMTP/TLS/ADH-AES256-SHA; 19 May 2011 22:00:14 -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 571E010004D2; Thu, 19 May 2011 21:59:52 -0700 (PDT) From: Mohan Pallaka To: dmitry.torokhov@gmail.com, linux@arm.linux.org.uk, rmk+kernel@arm.linux.org.uk Subject: [PATCH 1/2] pwm: Add stubs for pwm operations Date: Fri, 20 May 2011 10:29:44 +0530 Message-Id: <1305867584-31929-1-git-send-email-mpallaka@codeaurora.org> X-Mailer: git-send-email 1.7.1.1 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110520_010018_626884_7FECBBC8 X-CRM114-Status: GOOD ( 16.74 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [199.106.114.254 listed in list.dnswl.org] Cc: rmk@dyn-67.arm.linux.org.uk, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mohan Pallaka , linux-i2c@vger.kernel.org, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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, 20 May 2011 05:02:26 +0000 (UTC) Chip drivers that support both pwm and non-pwm modes would encounter compilation errors if the platform doesn't have support for pwm, even though the chip is programmed to work in non-pwm mode. Add stubs for pwm functions to avoid compilation errors in these scenarios. Signed-off-by: Mohan Pallaka --- include/linux/pwm.h | 23 +++++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-) -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 7c77575..54877f6 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -3,6 +3,7 @@ struct pwm_device; +#if defined(CONFIG_HAVE_PWM) /* * pwm_request - request a PWM device */ @@ -28,4 +29,26 @@ int pwm_enable(struct pwm_device *pwm); */ void pwm_disable(struct pwm_device *pwm); +#else + +struct pwm_device *pwm_request(int pwm_id, const char *label) +{ + return NULL; +} + +void pwm_free(struct pwm_device *pwm) { } + +int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) +{ + return -EINVAL; +} + +int pwm_enable(struct pwm_device *pwm) +{ + return -EINVAL; +} + +void pwm_disable(struct pwm_device *pwm) { } + +#endif /* CONFIG_HAVE_PWM */ #endif /* __LINUX_PWM_H */