clk-pxa.h
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/*
* 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 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 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); \
}
/*
* 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)
static 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);
#endif