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https://github.com/torvalds/linux
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cf719012b2
Some PLL clocks are N (multiplier) type clocks, or can be simplified as such. An example of the former is the DDR1 PLL clock on the A33. An example of the latter is the CPU PLL clock on the A80, in which the P divider is only used for low frequencies that are of little use. Both clocks support PLL lock detection. The mult clock macro implies support for this, but that is not true. The field is simply discarded. This patch adds proper support for it. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#ifndef _CCU_MULT_H_
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#define _CCU_MULT_H_
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#include "ccu_common.h"
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#include "ccu_frac.h"
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#include "ccu_mux.h"
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struct ccu_mult_internal {
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u8 offset;
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u8 shift;
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u8 width;
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u8 min;
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u8 max;
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};
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#define _SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, _min, _max) \
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{ \
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.min = _min, \
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.max = _max, \
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.offset = _offset, \
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.shift = _shift, \
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.width = _width, \
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}
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#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min) \
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, _min, 0)
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#define _SUNXI_CCU_MULT_OFFSET(_shift, _width, _offset) \
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, 1, 0)
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#define _SUNXI_CCU_MULT(_shift, _width) \
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, 1, 0)
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struct ccu_mult {
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u32 enable;
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u32 lock;
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struct ccu_frac_internal frac;
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struct ccu_mult_internal mult;
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struct ccu_mux_internal mux;
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struct ccu_common common;
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};
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#define SUNXI_CCU_N_WITH_GATE_LOCK(_struct, _name, _parent, _reg, \
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_mshift, _mwidth, _gate, _lock, \
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_flags) \
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struct ccu_mult _struct = { \
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.enable = _gate, \
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.lock = _lock, \
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.mult = _SUNXI_CCU_MULT(_mshift, _mwidth), \
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.common = { \
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.reg = _reg, \
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.hw.init = CLK_HW_INIT(_name, \
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_parent, \
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&ccu_mult_ops, \
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_flags), \
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}, \
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}
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static inline struct ccu_mult *hw_to_ccu_mult(struct clk_hw *hw)
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{
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struct ccu_common *common = hw_to_ccu_common(hw);
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return container_of(common, struct ccu_mult, common);
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}
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extern const struct clk_ops ccu_mult_ops;
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#endif /* _CCU_MULT_H_ */
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