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From: Mohan Pallaka <mpallaka@codeaurora.org>
To: dmitry.torokhov@gmail.com, linux@arm.linux.org.uk,
	rmk+kernel@arm.linux.org.uk
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-input@vger.kernel.org, linux-i2c@vger.kernel.org,
	rmk@dyn-67.arm.linux.org.uk,
	Mohan Pallaka <mpallaka@codeaurora.org>
Subject: [PATCH 1/2] pwm: Add stubs for pwm operations
Date: Fri, 20 May 2011 10:29:44 +0530	[thread overview]
Message-ID: <1305867584-31929-1-git-send-email-mpallaka@codeaurora.org> (raw)

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.

WARNING: multiple messages have this Message-ID
From: mpallaka@codeaurora.org (Mohan Pallaka)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] pwm: Add stubs for pwm operations
Date: Fri, 20 May 2011 10:29:44 +0530	[thread overview]
Message-ID: <1305867584-31929-1-git-send-email-mpallaka@codeaurora.org> (raw)

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.

             reply	other threads:[~2011-05-20  5:00 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-20  4:59 Mohan Pallaka [this message]
2011-05-20  4:59 ` Mohan Pallaka
2011-05-21 14:30 ` Mohan Pallaka
2011-05-21 14:30   ` Mohan Pallaka
2011-05-24 11:04   ` Mohan Pallaka
2011-05-24 11:04     ` Mohan Pallaka
     [not found]     ` <4DDB90D9.1020902-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2011-05-26 11:31       ` Mohan Pallaka
2011-05-26 11:31         ` Mohan Pallaka
2011-05-26 11:31         ` Mohan Pallaka
  -- strict thread matches above, loose matches on Subject: below --
2011-05-18 13:00 Mohan Pallaka
2011-05-18 13:00 ` Mohan Pallaka
2011-05-18 13:00 ` Mohan Pallaka
2011-05-18  5:18 [PATCH 0/2] Support for isa1200 haptic chip Mohan Pallaka
2011-05-18  5:18 ` [PATCH 1/2] pwm: Add stubs for pwm operations Mohan Pallaka
2011-05-18  5:18   ` Mohan Pallaka
2011-05-18  6:45   ` Dmitry Torokhov
2011-05-18  6:45     ` Dmitry Torokhov

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