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author | Chunyan Zhang <chunyan.zhang@spreadtrum.com> | 2017-12-07 20:57:10 +0800 |
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committer | Stephen Boyd <sboyd@codeaurora.org> | 2017-12-21 15:00:53 -0800 |
commit | 3e37b005580b9db89d7f335e121d52d3bd58e234 (patch) | |
tree | 49012bb7f11db65920d47855a3a29cd8fac8ab9a /drivers/clk/sprd/pll.h | |
parent | clk: sprd: add composite clock support (diff) | |
download | linux-dev-3e37b005580b9db89d7f335e121d52d3bd58e234.tar.xz linux-dev-3e37b005580b9db89d7f335e121d52d3bd58e234.zip |
clk: sprd: add adjustable pll support
Introduced a common adjustable pll clock driver for Spreadtrum SoCs.
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/sprd/pll.h')
-rw-r--r-- | drivers/clk/sprd/pll.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/clk/sprd/pll.h b/drivers/clk/sprd/pll.h new file mode 100644 index 000000000000..514175621099 --- /dev/null +++ b/drivers/clk/sprd/pll.h @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Spreadtrum pll clock driver +// +// Copyright (C) 2015~2017 Spreadtrum, Inc. +// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com> + +#ifndef _SPRD_PLL_H_ +#define _SPRD_PLL_H_ + +#include "common.h" + +struct reg_cfg { + u32 val; + u32 msk; +}; + +struct clk_bit_field { + u8 shift; + u8 width; +}; + +enum { + PLL_LOCK_DONE, + PLL_DIV_S, + PLL_MOD_EN, + PLL_SDM_EN, + PLL_REFIN, + PLL_IBIAS, + PLL_N, + PLL_NINT, + PLL_KINT, + PLL_PREDIV, + PLL_POSTDIV, + + PLL_FACT_MAX +}; + +/* + * struct sprd_pll - definition of adjustable pll clock + * + * @reg: registers used to set the configuration of pll clock, + * reg[0] shows how many registers this pll clock uses. + * @itable: pll ibias table, itable[0] means how many items this + * table includes + * @udelay delay time after setting rate + * @factors used to calculate the pll clock rate + * @fvco: fvco threshold rate + * @fflag: fvco flag + */ +struct sprd_pll { + u32 regs_num; + const u64 *itable; + const struct clk_bit_field *factors; + u16 udelay; + u16 k1; + u16 k2; + u16 fflag; + u64 fvco; + + struct sprd_clk_common common; +}; + +#define SPRD_PLL_WITH_ITABLE_K_FVCO(_struct, _name, _parent, _reg, \ + _regs_num, _itable, _factors, \ + _udelay, _k1, _k2, _fflag, _fvco) \ + struct sprd_pll _struct = { \ + .regs_num = _regs_num, \ + .itable = _itable, \ + .factors = _factors, \ + .udelay = _udelay, \ + .k1 = _k1, \ + .k2 = _k2, \ + .fflag = _fflag, \ + .fvco = _fvco, \ + .common = { \ + .regmap = NULL, \ + .reg = _reg, \ + .hw.init = CLK_HW_INIT(_name, \ + _parent, \ + &sprd_pll_ops, \ + 0), \ + }, \ + } + +#define SPRD_PLL_WITH_ITABLE_K(_struct, _name, _parent, _reg, \ + _regs_num, _itable, _factors, \ + _udelay, _k1, _k2) \ + SPRD_PLL_WITH_ITABLE_K_FVCO(_struct, _name, _parent, _reg, \ + _regs_num, _itable, _factors, \ + _udelay, _k1, _k2, 0, 0) + +#define SPRD_PLL_WITH_ITABLE_1K(_struct, _name, _parent, _reg, \ + _regs_num, _itable, _factors, _udelay) \ + SPRD_PLL_WITH_ITABLE_K_FVCO(_struct, _name, _parent, _reg, \ + _regs_num, _itable, _factors, \ + _udelay, 1000, 1000, 0, 0) + +static inline struct sprd_pll *hw_to_sprd_pll(struct clk_hw *hw) +{ + struct sprd_clk_common *common = hw_to_sprd_clk_common(hw); + + return container_of(common, struct sprd_pll, common); +} + +extern const struct clk_ops sprd_pll_ops; + +#endif /* _SPRD_PLL_H_ */ |