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authorThomas Chou <thomas@wytron.com.tw>2015-10-09 13:46:34 +0800
committerThomas Chou <thomas@wytron.com.tw>2015-10-23 07:37:03 +0800
commitc8a7ba9e6a5fe2fc7b4a7894829aa0b0148b4d40 (patch)
tree6b6ca5091a7e6927ca2c27fcec0e0b195e1a64c2 /include/timer.h
parentbcae80e9551bc0ba2d67e78bda57b9283b4bab12 (diff)
downloadu-boot-c8a7ba9e6a5fe2fc7b4a7894829aa0b0148b4d40.tar.gz
dm: implement a Timer uclass
Implement a Timer uclass to work with lib/time.c. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/timer.h')
-rw-r--r--include/timer.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/include/timer.h b/include/timer.h
new file mode 100644
index 0000000000..cdf385d174
--- /dev/null
+++ b/include/timer.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _TIMER_H_
+#define _TIMER_H_
+
+/*
+ * Get the current timer count
+ *
+ * @dev: The Timer device
+ * @count: pointer that returns the current timer count
+ * @return: 0 if OK, -ve on error
+ */
+int timer_get_count(struct udevice *dev, unsigned long *count);
+/*
+ * Get the timer input clock frequency
+ *
+ * @dev: The Timer device
+ * @return: the timer input clock frequency
+ */
+unsigned long timer_get_rate(struct udevice *dev);
+
+/*
+ * struct timer_ops - Driver model Timer operations
+ *
+ * The uclass interface is implemented by all Timer devices which use
+ * driver model.
+ */
+struct timer_ops {
+ /*
+ * Get the current timer count
+ *
+ * @dev: The Timer device
+ * @count: pointer that returns the current timer count
+ * @return: 0 if OK, -ve on error
+ */
+ int (*get_count)(struct udevice *dev, unsigned long *count);
+};
+
+/*
+ * struct timer_dev_priv - information about a device used by the uclass
+ *
+ * @clock_rate: the timer input clock frequency
+ */
+struct timer_dev_priv {
+ unsigned long clock_rate;
+};
+
+#endif /* _TIMER_H_ */