X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fpwm.h;h=bfdc1e3f30778b0a492c2653ef9cb30c7627295a;hb=c56289ddafce3d1ec442fb18064f136c2c47d0bb;hp=f24f2202f481a777e757fd9e8be286b4784ee627;hpb=326ea986ac150acdc7656d57fca647db80b50158;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/pwm.h b/include/pwm.h
index f24f220..bfdc1e3 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -1,18 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * header file for pwm driver.
  *
+ * Copyright 2016 Google Inc.
  * Copyright (c) 2011 samsung electronics
  * Donghwa Lee <dh09.lee@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _pwm_h_
 #define _pwm_h_
 
+struct udevice;
+
+/* struct pwm_ops: Operations for the PWM uclass */
+struct pwm_ops {
+	/**
+	 * set_config() - Set the PWM configuration
+	 *
+	 * Change both the PWM device's period and it's duty period if
+	 * possible. Otherwise, set an appropriate duty period that best
+	 * matches the given period_ns / duty_ns ratio for the device.
+	 *
+	 * @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);
+	/**
+	 * set_invert() - Set the PWM invert
+	 *
+	 * @dev:        PWM device to update
+	 * @channel:    PWM channel to update
+	 * @polarity:   true to invert, false to keep normal polarity
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*set_invert)(struct udevice *dev, uint channel, bool polarity);
+};
+
+#define pwm_get_ops(dev)	((struct pwm_ops *)(dev)->driver->ops)
+
+/**
+ * pwm_set_config() - Set the PWM configuration
+ *
+ * Change both the PWM device's period and it's duty period if
+ * possible. Otherwise, set an appropriate duty period that best
+ * matches the given period_ns / duty_ns ratio for the device.
+ *
+ * @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);
+
+/**
+ * pwm_set_invert() - Set pwm default polarity
+ *
+ * @dev:	PWM device to update
+ * @channel:	PWM channel to update
+ * @polarity:	true to invert, false to keep normal polarity
+ * Return: 0 if OK, -ve on error
+ */
+int pwm_set_invert(struct udevice *dev, uint channel, bool polarity);
+
+/* 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_ */