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Some clocks only can be accessed if their parent is enabled. mipi_csi_xx clocks on SC9863A are an examples. We have to ensure the parent clock is enabled when reading those clocks. Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Link: https://lkml.kernel.org/r/20200527053638.31439-2-zhang.lyra@gmail.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
168 lines
5.6 KiB
C
168 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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//
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// Spreadtrum gate clock driver
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//
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// Copyright (C) 2017 Spreadtrum, Inc.
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// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
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#ifndef _SPRD_GATE_H_
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#define _SPRD_GATE_H_
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#include "common.h"
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struct sprd_gate {
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u32 enable_mask;
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u16 flags;
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u16 sc_offset;
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u16 udelay;
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struct sprd_clk_common common;
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};
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/*
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* sprd_gate->flags is used for:
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* CLK_GATE_SET_TO_DISABLE BIT(0)
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* CLK_GATE_HIWORD_MASK BIT(1)
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* CLK_GATE_BIG_ENDIAN BIT(2)
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* so we define new flags from BIT(3)
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*/
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#define SPRD_GATE_NON_AON BIT(3) /* not alway powered on, check before read */
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#define SPRD_SC_GATE_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, _ops, _fn) \
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struct sprd_gate _struct = { \
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.enable_mask = _enable_mask, \
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.sc_offset = _sc_offset, \
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.flags = _gate_flags, \
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.udelay = _udelay, \
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.common = { \
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.regmap = NULL, \
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.reg = _reg, \
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.hw.init = _fn(_name, _parent, \
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_ops, _flags), \
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} \
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}
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#define SPRD_SC_GATE_CLK_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, _ops) \
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SPRD_SC_GATE_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, _ops, CLK_HW_INIT)
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#define SPRD_SC_GATE_CLK_OPS(_struct, _name, _parent, _reg, _sc_offset, \
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_enable_mask, _flags, _gate_flags, _ops) \
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SPRD_SC_GATE_CLK_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, 0, _ops)
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#define SPRD_SC_GATE_CLK(_struct, _name, _parent, _reg, _sc_offset, \
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_enable_mask, _flags, _gate_flags) \
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SPRD_SC_GATE_CLK_OPS(_struct, _name, _parent, _reg, _sc_offset, \
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_enable_mask, _flags, _gate_flags, \
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&sprd_sc_gate_ops)
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#define SPRD_GATE_CLK(_struct, _name, _parent, _reg, \
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_enable_mask, _flags, _gate_flags) \
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SPRD_SC_GATE_CLK_OPS(_struct, _name, _parent, _reg, 0, \
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_enable_mask, _flags, _gate_flags, \
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&sprd_gate_ops)
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#define SPRD_PLL_SC_GATE_CLK(_struct, _name, _parent, _reg, _sc_offset, \
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_enable_mask, _flags, _gate_flags, \
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_udelay) \
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SPRD_SC_GATE_CLK_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, \
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&sprd_pll_sc_gate_ops)
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#define SPRD_SC_GATE_CLK_HW_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, \
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_flags, _gate_flags, \
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_udelay, _ops) \
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SPRD_SC_GATE_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, _ops, \
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CLK_HW_INIT_HW)
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#define SPRD_SC_GATE_CLK_HW_OPS(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _ops) \
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SPRD_SC_GATE_CLK_HW_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, \
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_flags, _gate_flags, 0, _ops)
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#define SPRD_SC_GATE_CLK_HW(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags) \
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SPRD_SC_GATE_CLK_HW_OPS(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, &sprd_sc_gate_ops)
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#define SPRD_GATE_CLK_HW(_struct, _name, _parent, _reg, \
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_enable_mask, _flags, _gate_flags) \
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SPRD_SC_GATE_CLK_HW_OPS(_struct, _name, _parent, _reg, 0, \
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_enable_mask, _flags, _gate_flags, \
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&sprd_gate_ops)
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#define SPRD_PLL_SC_GATE_CLK_HW(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay) \
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SPRD_SC_GATE_CLK_HW_OPS_UDELAY(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, \
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_flags, _gate_flags, _udelay, \
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&sprd_pll_sc_gate_ops)
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#define SPRD_SC_GATE_CLK_FW_NAME_OPS_UDELAY(_struct, _name, _parent, \
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_reg, _sc_offset, \
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_enable_mask, _flags, \
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_gate_flags, _udelay, _ops) \
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SPRD_SC_GATE_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay, _ops, \
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CLK_HW_INIT_FW_NAME)
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#define SPRD_SC_GATE_CLK_FW_NAME_OPS(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _ops) \
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SPRD_SC_GATE_CLK_FW_NAME_OPS_UDELAY(_struct, _name, _parent, \
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_reg, _sc_offset, \
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_enable_mask, _flags, \
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_gate_flags, 0, _ops)
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#define SPRD_SC_GATE_CLK_FW_NAME(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags) \
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SPRD_SC_GATE_CLK_FW_NAME_OPS(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, &sprd_sc_gate_ops)
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#define SPRD_GATE_CLK_FW_NAME(_struct, _name, _parent, _reg, \
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_enable_mask, _flags, _gate_flags) \
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SPRD_SC_GATE_CLK_FW_NAME_OPS(_struct, _name, _parent, _reg, 0, \
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_enable_mask, _flags, _gate_flags, \
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&sprd_gate_ops)
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#define SPRD_PLL_SC_GATE_CLK_FW_NAME(_struct, _name, _parent, _reg, \
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_sc_offset, _enable_mask, _flags, \
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_gate_flags, _udelay) \
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SPRD_SC_GATE_CLK_FW_NAME_OPS_UDELAY(_struct, _name, _parent, \
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_reg, _sc_offset, \
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_enable_mask, _flags, \
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_gate_flags, _udelay, \
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&sprd_pll_sc_gate_ops)
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static inline struct sprd_gate *hw_to_sprd_gate(const struct clk_hw *hw)
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{
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struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
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return container_of(common, struct sprd_gate, common);
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}
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extern const struct clk_ops sprd_gate_ops;
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extern const struct clk_ops sprd_sc_gate_ops;
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extern const struct clk_ops sprd_pll_sc_gate_ops;
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#endif /* _SPRD_GATE_H_ */
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