[PATCH 1/2] pwm: Add __weak attributed functions for pwm operations
From: Mohan Pallaka <hidden>
Date: 2011-05-13 12:43:45
Also in:
linux-arm-msm, linux-i2c, lkml
Subsystem:
pwm subsystem, the rest · Maintainers:
Uwe Kleine-König, Linus Torvalds
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 <redacted> --- 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 */
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