From mboxrd@z Thu Jan 1 00:00:00 1970 From: mpallaka@codeaurora.org (Mohan Pallaka) Date: Wed, 18 May 2011 18:30:52 +0530 Subject: [PATCH 1/2] pwm: Add stubs for pwm operations Message-ID: <1305723652-22737-1-git-send-email-mpallaka@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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. Change-Id: Iec4c55fce253bda809947672be82a7bd14bcd663 Signed-off-by: Mohan Pallaka --- include/linux/pwm.h | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-) diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 7c77575..a3cb33f 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 +29,27 @@ 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_PWM */ #endif /* __LINUX_PWM_H */ -- 1.7.1.1