dm: core: allow device_bind() to not return a device pointer

[karo-tx-uboot.git] / include / clk.h

diff --git a/include/clk.h b/include/clk.h
index df4570c6f54abb0f5e6aac166b8096c19becdf69..254ad2b8761bf4acef3a5b4b06b3c6bc4c11ac11 100644 (file)
--- a/include/clk.h
+++ b/include/clk.h
@@ -1,6 +1,86 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
 #ifndef _CLK_H_
 #define _CLK_H_
 
 int soc_clk_dump(void);
 
+struct clk_ops {
+       /**
+        * get_rate() - Get current clock rate
+        *
+        * @dev:        Device to check (UCLASS_CLK)
+        * @return clock rate in Hz, or -ve error code
+        */
+       ulong (*get_rate)(struct udevice *dev);
+
+       /**
+        * set_rate() - Set current clock rate
+        *
+        * @dev:        Device to adjust
+        * @rate:       New clock rate in Hz
+        * @return new rate, or -ve error code
+        */
+       ulong (*set_rate)(struct udevice *dev, ulong rate);
+
+       /**
+       * clk_set_periph_rate() - Set clock rate for a peripheral
+       *
+       * @dev: Device to adjust (UCLASS_CLK)
+       * @rate:        New clock rate in Hz
+       * @return new clock rate in Hz, or -ve error code
+       */
+       ulong (*get_periph_rate)(struct udevice *dev, int periph);
+
+       /**
+        * clk_set_periph_rate() - Set current clock rate for a peripheral
+        *
+        * @dev:        Device to update (UCLASS_CLK)
+        * @periph:     Peripheral ID to cupdate
+        * @return new clock rate in Hz, or -ve error code
+        */
+       ulong (*set_periph_rate)(struct udevice *dev, int periph, ulong rate);
+};
+
+#define clk_get_ops(dev)       ((struct clk_ops *)(dev)->driver->ops)
+
+/**
+ * clk_get_rate() - Get current clock rate
+ *
+ * @dev:       Device to check (UCLASS_CLK)
+ * @return clock rate in Hz, or -ve error code
+ */
+ulong clk_get_rate(struct udevice *dev);
+
+/**
+ * set_rate() - Set current clock rate
+ *
+ * @dev:       Device to adjust
+ * @rate:      New clock rate in Hz
+ * @return new rate, or -ve error code
+ */
+ulong clk_set_rate(struct udevice *dev, ulong rate);
+
+/**
+ * clk_get_periph_rate() - Get current clock rate for a peripheral
+ *
+ * @dev:       Device to check (UCLASS_CLK)
+ * @return clock rate in Hz, -ve error code
+ */
+ulong clk_get_periph_rate(struct udevice *dev, int periph);
+
+/**
+ * clk_set_periph_rate() - Set current clock rate for a peripheral
+ *
+ * @dev:       Device to update (UCLASS_CLK)
+ * @periph:    Peripheral ID to cupdate
+ * @return new clock rate in Hz, or -ve error code
+ */
+ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate);
+
 #endif /* _CLK_H_ */