dm: pwm: Add a PWM uclass
Add a uclass that supports Pulse Width Modulation (PWM) devices. It
provides methods to enable/disable and configure the device.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/pwm.h b/include/pwm.h
index f24f220..851915e 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -1,6 +1,7 @@
/*
* header file for pwm driver.
*
+ * Copyright 2016 Google Inc.
* Copyright (c) 2011 samsung electronics
* Donghwa Lee <dh09.lee@samsung.com>
*
@@ -10,9 +11,61 @@
#ifndef _pwm_h_
#define _pwm_h_
+/* struct pwm_ops: Operations for the PWM uclass */
+struct pwm_ops {
+ /**
+ * set_config() - Set the PWM configuration
+ *
+ * @dev: PWM device to update
+ * @channel: PWM channel to update
+ * @period_ns: PWM period in nanoseconds
+ * @duty_ns: PWM duty period in nanoseconds
+ * @return 0 if OK, -ve on error
+ */
+ int (*set_config)(struct udevice *dev, uint channel, uint period_ns,
+ uint duty_ns);
+
+ /**
+ * set_enable() - Enable or disable the PWM
+ *
+ * @dev: PWM device to update
+ * @channel: PWM channel to update
+ * @enable: true to enable, false to disable
+ * @return 0 if OK, -ve on error
+ */
+ int (*set_enable)(struct udevice *dev, uint channel, bool enable);
+};
+
+#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops)
+
+/**
+ * pwm_set_config() - Set the PWM configuration
+ *
+ * @dev: PWM device to update
+ * @channel: PWM channel to update
+ * @period_ns: PWM period in nanoseconds
+ * @duty_ns: PWM duty period in nanoseconds
+ * @return 0 if OK, -ve on error
+ */
+int pwm_set_config(struct udevice *dev, uint channel, uint period_ns,
+ uint duty_ns);
+
+/**
+ * pwm_set_enable() - Enable or disable the PWM
+ *
+ * @dev: PWM device to update
+ * @channel: PWM channel to update
+ * @enable: true to enable, false to disable
+ * @return 0 if OK, -ve on error
+ */
+int pwm_set_enable(struct udevice *dev, uint channel, bool enable);
+
+/* Legacy interface */
+#ifndef CONFIG_DM_PWM
int pwm_init (int pwm_id, int div, int invert);
int pwm_config (int pwm_id, int duty_ns, int period_ns);
int pwm_enable (int pwm_id);
void pwm_disable (int pwm_id);
+#endif
#endif /* _pwm_h_ */