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e66f81bbd7
The factors we've seen so far all had an offset of one. However, on the earlier Allwinner SoCs, some factors could have no offset at all, meaning that the value computed to reach the rate we want to use was the one we had to program in the registers. Implement an additional field for the factors that can have such an offset (linears, not based on a power of two) to specify that offset. This offset is not linked to the extremums that can be specified in those structures too. The minimum and maximum are representing the range of values we can use to try to compute the best rate. The offset comes later on when we want to set the best value in the registers. Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
66 lines
1.5 KiB
C
66 lines
1.5 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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};
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#define _SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, _min) \
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{ \
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.min = _min, \
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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(_shift, _width, 1, _min)
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#define _SUNXI_CCU_MULT_OFFSET(_shift, _width, _offset) \
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_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, 1)
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#define _SUNXI_CCU_MULT(_shift, _width) \
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_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, 1, 1)
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struct ccu_mult {
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u32 enable;
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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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.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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