diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-mux.h')
| -rw-r--r-- | drivers/clk/mediatek/clk-mux.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mux.h b/drivers/clk/mediatek/clk-mux.h new file mode 100644 index 0000000000..7ecb963b0e --- /dev/null +++ b/drivers/clk/mediatek/clk-mux.h @@ -0,0 +1,108 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018 MediaTek Inc. + * Author: Owen Chen <owen.chen@mediatek.com> + */ + +#ifndef __DRV_CLK_MTK_MUX_H +#define __DRV_CLK_MTK_MUX_H + +#include <linux/notifier.h> +#include <linux/spinlock.h> +#include <linux/types.h> + +struct clk; +struct clk_hw_onecell_data; +struct clk_ops; +struct device; +struct device_node; + +struct mtk_mux { + int id; + const char *name; + const char * const *parent_names; + unsigned int flags; + + u32 mux_ofs; + u32 set_ofs; + u32 clr_ofs; + u32 upd_ofs; + + u8 mux_shift; + u8 mux_width; + u8 gate_shift; + s8 upd_shift; + + const struct clk_ops *ops; + signed char num_parents; +}; + +#define GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + _gate, _upd_ofs, _upd, _flags, _ops) { \ + .id = _id, \ + .name = _name, \ + .mux_ofs = _mux_ofs, \ + .set_ofs = _mux_set_ofs, \ + .clr_ofs = _mux_clr_ofs, \ + .upd_ofs = _upd_ofs, \ + .mux_shift = _shift, \ + .mux_width = _width, \ + .gate_shift = _gate, \ + .upd_shift = _upd, \ + .parent_names = _parents, \ + .num_parents = ARRAY_SIZE(_parents), \ + .flags = _flags, \ + .ops = &_ops, \ + } + +extern const struct clk_ops mtk_mux_clr_set_upd_ops; +extern const struct clk_ops mtk_mux_gate_clr_set_upd_ops; + +#define MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + _gate, _upd_ofs, _upd, _flags) \ + GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + _gate, _upd_ofs, _upd, _flags, \ + mtk_mux_gate_clr_set_upd_ops) + +#define MUX_GATE_CLR_SET_UPD(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + _gate, _upd_ofs, _upd) \ + MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, \ + _mux_ofs, _mux_set_ofs, _mux_clr_ofs, _shift, \ + _width, _gate, _upd_ofs, _upd, \ + CLK_SET_RATE_PARENT) + +#define MUX_CLR_SET_UPD(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + _upd_ofs, _upd) \ + GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs, \ + _mux_set_ofs, _mux_clr_ofs, _shift, _width, \ + 0, _upd_ofs, _upd, CLK_SET_RATE_PARENT, \ + mtk_mux_clr_set_upd_ops) + +int mtk_clk_register_muxes(struct device *dev, + const struct mtk_mux *muxes, + int num, struct device_node *node, + spinlock_t *lock, + struct clk_hw_onecell_data *clk_data); + +void mtk_clk_unregister_muxes(const struct mtk_mux *muxes, int num, + struct clk_hw_onecell_data *clk_data); + +struct mtk_mux_nb { + struct notifier_block nb; + const struct clk_ops *ops; + + u8 bypass_index; /* Which parent to temporarily use */ + u8 original_index; /* Set by notifier callback */ +}; + +#define to_mtk_mux_nb(_nb) container_of(_nb, struct mtk_mux_nb, nb) + +int devm_mtk_clk_mux_notifier_register(struct device *dev, struct clk *clk, + struct mtk_mux_nb *mux_nb); + +#endif /* __DRV_CLK_MTK_MUX_H */ |