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Diffstat (limited to 'drivers/clk/mediatek/clk-mtk.h')
| -rw-r--r-- | drivers/clk/mediatek/clk-mtk.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h new file mode 100644 index 0000000000..74152ed9c6 --- /dev/null +++ b/drivers/clk/mediatek/clk-mtk.h @@ -0,0 +1,194 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 MediaTek Inc. + * Author: Ryder Lee <ryder.lee@mediatek.com> + */ + +#ifndef __DRV_CLK_MTK_H +#define __DRV_CLK_MTK_H + +#define CLK_XTAL 0 +#define MHZ (1000 * 1000) + +#define HAVE_RST_BAR BIT(0) +#define CLK_DOMAIN_SCPSYS BIT(0) + +#define CLK_GATE_SETCLR BIT(0) +#define CLK_GATE_SETCLR_INV BIT(1) +#define CLK_GATE_NO_SETCLR BIT(2) +#define CLK_GATE_NO_SETCLR_INV BIT(3) +#define CLK_GATE_MASK GENMASK(3, 0) + +#define CLK_PARENT_APMIXED BIT(4) +#define CLK_PARENT_TOPCKGEN BIT(5) +#define CLK_PARENT_MASK GENMASK(5, 4) + +/* struct mtk_pll_data - hardware-specific PLLs data */ +struct mtk_pll_data { + const int id; + u32 reg; + u32 pwr_reg; + u32 en_mask; + u32 pd_reg; + int pd_shift; + u32 flags; + u32 rst_bar_mask; + u64 fmax; + int pcwbits; + u32 pcw_reg; + int pcw_shift; +}; + +/** + * struct mtk_fixed_clk - fixed clocks + * + * @id: index of clocks + * @parent: index of parnet clocks + * @rate: fixed rate + */ +struct mtk_fixed_clk { + const int id; + const int parent; + unsigned long rate; +}; + +#define FIXED_CLK(_id, _parent, _rate) { \ + .id = _id, \ + .parent = _parent, \ + .rate = _rate, \ + } + +/** + * struct mtk_fixed_factor - fixed multiplier and divider clocks + * + * @id: index of clocks + * @parent: index of parnet clocks + * @mult: multiplier + * @div: divider + * @flag: hardware-specific flags + */ +struct mtk_fixed_factor { + const int id; + const int parent; + u32 mult; + u32 div; + u32 flags; +}; + +#define FACTOR(_id, _parent, _mult, _div, _flags) { \ + .id = _id, \ + .parent = _parent, \ + .mult = _mult, \ + .div = _div, \ + .flags = _flags, \ + } + +/** + * struct mtk_composite - aggregate clock of mux, divider and gate clocks + * + * @id: index of clocks + * @parent: index of parnet clocks + * @mux_reg: hardware-specific mux register + * @gate_reg: hardware-specific gate register + * @mux_mask: mask to the mux bit field + * @mux_shift: shift to the mux bit field + * @gate_shift: shift to the gate bit field + * @num_parents: number of parent clocks + * @flags: hardware-specific flags + */ +struct mtk_composite { + const int id; + const int *parent; + u32 mux_reg; + u32 gate_reg; + u32 mux_mask; + signed char mux_shift; + signed char gate_shift; + signed char num_parents; + u16 flags; +}; + +#define MUX_GATE_FLAGS(_id, _parents, _reg, _shift, _width, _gate, \ + _flags) { \ + .id = _id, \ + .mux_reg = _reg, \ + .mux_shift = _shift, \ + .mux_mask = BIT(_width) - 1, \ + .gate_reg = _reg, \ + .gate_shift = _gate, \ + .parent = _parents, \ + .num_parents = ARRAY_SIZE(_parents), \ + .flags = _flags, \ + } + +#define MUX_GATE(_id, _parents, _reg, _shift, _width, _gate) \ + MUX_GATE_FLAGS(_id, _parents, _reg, _shift, _width, _gate, 0) + +#define MUX(_id, _parents, _reg, _shift, _width) { \ + .id = _id, \ + .mux_reg = _reg, \ + .mux_shift = _shift, \ + .mux_mask = BIT(_width) - 1, \ + .gate_shift = -1, \ + .parent = _parents, \ + .num_parents = ARRAY_SIZE(_parents), \ + .flags = 0, \ + } + +struct mtk_gate_regs { + u32 sta_ofs; + u32 clr_ofs; + u32 set_ofs; +}; + +/** + * struct mtk_gate - gate clocks + * + * @id: index of gate clocks + * @parent: index of parnet clocks + * @regs: hardware-specific mux register + * @shift: shift to the gate bit field + * @flags: hardware-specific flags + */ +struct mtk_gate { + const int id; + const int parent; + const struct mtk_gate_regs *regs; + int shift; + u32 flags; +}; + +/* struct mtk_clk_tree - clock tree */ +struct mtk_clk_tree { + unsigned long xtal_rate; + unsigned long xtal2_rate; + const int fdivs_offs; + const int muxes_offs; + const struct mtk_pll_data *plls; + const struct mtk_fixed_clk *fclks; + const struct mtk_fixed_factor *fdivs; + const struct mtk_composite *muxes; +}; + +struct mtk_clk_priv { + void __iomem *base; + const struct mtk_clk_tree *tree; +}; + +struct mtk_cg_priv { + void __iomem *base; + const struct mtk_clk_tree *tree; + const struct mtk_gate *gates; +}; + +extern const struct clk_ops mtk_clk_apmixedsys_ops; +extern const struct clk_ops mtk_clk_topckgen_ops; +extern const struct clk_ops mtk_clk_gate_ops; + +int mtk_common_clk_init(struct udevice *dev, + const struct mtk_clk_tree *tree); +int mtk_common_clk_gate_init(struct udevice *dev, + const struct mtk_clk_tree *tree, + const struct mtk_gate *gates); + +#endif /* __DRV_CLK_MTK_H */ |