diff options
Diffstat (limited to 'drivers/clk/actions/owl-pll.h')
| -rw-r--r-- | drivers/clk/actions/owl-pll.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/drivers/clk/actions/owl-pll.h b/drivers/clk/actions/owl-pll.h new file mode 100644 index 000000000..0aae30abd --- /dev/null +++ b/drivers/clk/actions/owl-pll.h @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// OWL pll clock driver +// +// Copyright (c) 2014 Actions Semi Inc. +// Author: David Liu <liuwei@actions-semi.com> +// +// Copyright (c) 2018 Linaro Ltd. +// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> + +#ifndef _OWL_PLL_H_ +#define _OWL_PLL_H_ + +#include "owl-common.h" + +/* last entry should have rate = 0 */ +struct clk_pll_table { + unsigned int val; + unsigned long rate; +}; + +struct owl_pll_hw { + u32 reg; + u32 bfreq; + u8 bit_idx; + u8 shift; + u8 width; + u8 min_mul; + u8 max_mul; + const struct clk_pll_table *table; +}; + +struct owl_pll { + struct owl_pll_hw pll_hw; + struct owl_clk_common common; +}; + +#define OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift, \ + _width, _min_mul, _max_mul, _table) \ + { \ + .reg = _reg, \ + .bfreq = _bfreq, \ + .bit_idx = _bit_idx, \ + .shift = _shift, \ + .width = _width, \ + .min_mul = _min_mul, \ + .max_mul = _max_mul, \ + .table = _table, \ + } + +#define OWL_PLL(_struct, _name, _parent, _reg, _bfreq, _bit_idx, \ + _shift, _width, _min_mul, _max_mul, _table, _flags) \ + struct owl_pll _struct = { \ + .pll_hw = OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift, \ + _width, _min_mul, \ + _max_mul, _table), \ + .common = { \ + .regmap = NULL, \ + .hw.init = CLK_HW_INIT(_name, \ + _parent, \ + &owl_pll_ops, \ + _flags), \ + }, \ + } + +#define OWL_PLL_NO_PARENT(_struct, _name, _reg, _bfreq, _bit_idx, \ + _shift, _width, _min_mul, _max_mul, _table, _flags) \ + struct owl_pll _struct = { \ + .pll_hw = OWL_PLL_HW(_reg, _bfreq, _bit_idx, _shift, \ + _width, _min_mul, \ + _max_mul, _table), \ + .common = { \ + .regmap = NULL, \ + .hw.init = CLK_HW_INIT_NO_PARENT(_name, \ + &owl_pll_ops, \ + _flags), \ + }, \ + } + +#define mul_mask(m) ((1 << ((m)->width)) - 1) +#define PLL_STABILITY_WAIT_US (50) + +static inline struct owl_pll *hw_to_owl_pll(const struct clk_hw *hw) +{ + struct owl_clk_common *common = hw_to_owl_clk_common(hw); + + return container_of(common, struct owl_pll, common); +} + +extern const struct clk_ops owl_pll_ops; + +#endif /* _OWL_PLL_H_ */ |