Thread (4 messages) 4 messages, 1 author, 2011-05-26

[PATCH 1/2] pwm: Add stubs for pwm operations

From: Mohan Pallaka <hidden>
Date: 2011-05-26 11:31:26
Also in: linux-arm-msm, linux-i2c, linux-input, lkml

  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:
quoted
 On 5/20/2011 10:29 AM, Mohan Pallaka wrote:
quoted
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.
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 at vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help