On 5/20/2011 10:29 AM, Mohan Pallaka wrote:
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<mpallaka@xxxxxxxxxxxxxx>
---
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.
Hi Russell, please review this patch.
--Mohan
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