From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sun, 13 Apr 2008 20:41:55 +0000 (+0100)
Subject: [ARM] pxa: Add bare bones PWM API
X-Git-Tag: firefly_0821_release~19445^2^2~35^2~12
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1a189b97190d3f0f8cf0379a799d3555b2d648bb;p=firefly-linux-kernel-4.4.55.git

[ARM] pxa: Add bare bones PWM API

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b786e68914d4..c274dbb89a83 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -22,6 +22,9 @@ config ARM
 	  Europe.  There is an ARM Linux project with a web page at
 	  <http://www.arm.linux.org.uk/>.
 
+config HAVE_PWM
+	bool
+
 config SYS_SUPPORTS_APM_EMULATION
 	bool
 
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
new file mode 100644
index 000000000000..3945f803d514
--- /dev/null
+++ b/include/linux/pwm.h
@@ -0,0 +1,31 @@
+#ifndef __LINUX_PWM_H
+#define __LINUX_PWM_H
+
+struct pwm_device;
+
+/*
+ * pwm_request - request a PWM device
+ */
+struct pwm_device *pwm_request(int pwm_id, const char *label);
+
+/*
+ * pwm_free - free a PWM device
+ */
+void 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);
+
+/*
+ * pwm_enable - start a PWM output toggling
+ */
+int pwm_enable(struct pwm_device *pwm);
+
+/*
+ * pwm_disable - stop a PWM output toggling
+ */
+void pwm_disable(struct pwm_device *pwm);
+
+#endif /* __ASM_ARCH_PWM_H */