[PATCH 1/2] pwm: Add stubs for pwm operations
From: Mohan Pallaka <hidden>
Date: 2011-05-20 05:00:36
Also in:
linux-arm-msm, linux-i2c, linux-input, lkml
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
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 <redacted> --- 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.