Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935261Ab1ETFAg (ORCPT ); Fri, 20 May 2011 01:00:36 -0400 Received: from wolverine01.qualcomm.com ([199.106.114.254]:32703 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752233Ab1ETFAe (ORCPT ); Fri, 20 May 2011 01:00:34 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,6351"; a="92430695" From: Mohan Pallaka To: dmitry.torokhov@gmail.com, linux@arm.linux.org.uk, rmk+kernel@arm.linux.org.uk Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.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 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 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1588 Lines: 58 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(-) 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 */ -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/