[1/2] pwm: Add stubs for pwm operations
diff mbox

Message ID 1305867584-31929-1-git-send-email-mpallaka@codeaurora.org
State New, archived
Headers show

Commit Message

Mohan Pallaka May 20, 2011, 4:59 a.m. UTC
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@codeaurora.org>
---
 include/linux/pwm.h |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

Comments

Mohan Pallaka May 24, 2011, 11:04 a.m. UTC | #1
Ping.

Hi Russell, please take sometime to review this patch.

Thanks, Mohan.

On 5/21/2011 8:00 PM, Mohan Pallaka wrote:
>  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@codeaurora.org>
>> ---
>>   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
> -- 
> To unsubscribe from this list: send the line "unsubscribe 
> linux-arm-msm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
Mohan Pallaka May 26, 2011, 11:31 a.m. UTC | #2
Hi Russell, please let me know if this patch looks okay for you.

Thanks, Mohan.

On 5/24/2011 4:34 PM, Mohan Pallaka wrote:
>  Ping.
>
> Hi Russell, please take sometime to review this patch.
>
> Thanks, Mohan.
>
> On 5/21/2011 8:00 PM, Mohan Pallaka wrote:
>>  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@codeaurora.org>
>>> ---
>>>   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
>> -- 
>> To unsubscribe from this list: send the line "unsubscribe 
>> linux-arm-msm" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Patch
diff mbox

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 */