[ARM] pxa: Add bare bones PWM API

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

2 files changed, 34 insertions, 0 deletions

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 */