diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/clk.h | 80 | ||||
| -rw-r--r-- | include/dm/uclass-id.h | 1 |
2 files changed, 81 insertions, 0 deletions
diff --git a/include/clk.h b/include/clk.h index df4570c6f54..254ad2b8761 100644 --- 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_ */ diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index b993fc0a063..bc057d7adf0 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -25,6 +25,7 @@ enum uclass_id { UCLASS_SIMPLE_BUS, /* bus with child devices */ /* U-Boot uclasses start here - in alphabetical order */ + UCLASS_CLK, /* Clock source, e.g. used by peripherals */ UCLASS_CPU, /* CPU, typically part of an SoC */ UCLASS_CROS_EC, /* Chrome OS EC */ UCLASS_DISPLAY_PORT, /* Display port video */ |