diff options
Diffstat (limited to 'drivers/clk/pxa/clk-pxa.h')
| -rw-r--r-- | drivers/clk/pxa/clk-pxa.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/clk/pxa/clk-pxa.h b/drivers/clk/pxa/clk-pxa.h new file mode 100644 index 000000000..2b90c5917 --- /dev/null +++ b/drivers/clk/pxa/clk-pxa.h @@ -0,0 +1,163 @@ +/* + * Marvell PXA family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Common clock code for PXA clocks ("CKEN" type clocks + DT) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + */ +#ifndef _CLK_PXA_ +#define _CLK_PXA_ + +#define CLKCFG_TURBO 0x1 +#define CLKCFG_FCS 0x2 +#define CLKCFG_HALFTURBO 0x4 +#define CLKCFG_FASTBUS 0x8 + +#define PARENTS(name) \ + static const char *const name ## _parents[] __initconst +#define MUX_RO_RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _mux_hw; \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _mux_ops = { \ + .get_parent = name ## _get_parent, \ + .set_parent = dummy_clk_set_parent, \ + }; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + &name ## _mux_hw, &name ## _mux_ops, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +#define RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _rate_hw; \ + static const struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + NULL, NULL, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +#define RATE_OPS(name, clk_name) \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + .set_rate = name ## _set_rate, \ + .determine_rate = name ## _determine_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + NULL, NULL, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +#define MUX_OPS(name, clk_name, flags) \ + static struct clk_hw name ## _mux_hw; \ + static const struct clk_ops name ## _mux_ops = { \ + .get_parent = name ## _get_parent, \ + .set_parent = name ## _set_parent, \ + .determine_rate = name ## _determine_rate, \ + }; \ + static struct clk * __init clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + &name ## _mux_hw, &name ## _mux_ops, \ + NULL, NULL, \ + NULL, NULL, \ + CLK_GET_RATE_NOCACHE | flags); \ + } + +/* + * CKEN clock type + * This clock takes it source from 2 possible parents : + * - a low power parent + * - a normal parent + * + * +------------+ +-----------+ + * | Low Power | --- | x mult_lp | + * | Clock | | / div_lp |\ + * +------------+ +-----------+ \+-----+ +-----------+ + * | Mux |---| CKEN gate | + * +------------+ +-----------+ /+-----+ +-----------+ + * | High Power | | x mult_hp |/ + * | Clock | --- | / div_hp | + * +------------+ +-----------+ + */ +struct desc_clk_cken { + struct clk_hw hw; + int ckid; + const char *name; + const char *dev_id; + const char *con_id; + const char * const *parent_names; + struct clk_fixed_factor lp; + struct clk_fixed_factor hp; + struct clk_gate gate; + bool (*is_in_low_power)(void); + const unsigned long flags; +}; + +#define PXA_CKEN(_dev_id, _con_id, _name, parents, _mult_lp, _div_lp, \ + _mult_hp, _div_hp, is_lp, _cken_reg, _cken_bit, flag) \ + { .ckid = CLK_ ## _name, .name = #_name, \ + .dev_id = _dev_id, .con_id = _con_id, .parent_names = parents,\ + .lp = { .mult = _mult_lp, .div = _div_lp }, \ + .hp = { .mult = _mult_hp, .div = _div_hp }, \ + .is_in_low_power = is_lp, \ + .gate = { .reg = (void __iomem *)_cken_reg, .bit_idx = _cken_bit }, \ + .flags = flag, \ + } +#define PXA_CKEN_1RATE(dev_id, con_id, name, parents, cken_reg, \ + cken_bit, flag) \ + PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1, \ + NULL, cken_reg, cken_bit, flag) + +struct pxa2xx_freq { + unsigned long cpll; + unsigned int membus_khz; + unsigned int cccr; + unsigned int div2; + unsigned int clkcfg; +}; + +static inline int dummy_clk_set_parent(struct clk_hw *hw, u8 index) +{ + return 0; +} + +extern void clkdev_pxa_register(int ckid, const char *con_id, + const char *dev_id, struct clk *clk); +extern int clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks); +void clk_pxa_dt_common_init(struct device_node *np); + +void pxa2xx_core_turbo_switch(bool on); +void pxa2xx_cpll_change(struct pxa2xx_freq *freq, + u32 (*mdrefr_dri)(unsigned int), void __iomem *mdrefr, + void __iomem *cccr); +int pxa2xx_determine_rate(struct clk_rate_request *req, + struct pxa2xx_freq *freqs, int nb_freqs); + +#endif |