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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Renesas RZ/V2H(P) Clock Pulse Generator
*
* Copyright (C) 2024 Renesas Electronics Corp.
*/
#ifndef __RENESAS_RZV2H_CPG_H__
#define __RENESAS_RZV2H_CPG_H__
#include <linux/bitfield.h>
/**
* struct ddiv - Structure for dynamic switching divider
*
* @offset: register offset
* @shift: position of the divider bit
* @width: width of the divider
* @monbit: monitor bit in CPG_CLKSTATUS0 register
*/
struct ddiv {
unsigned int offset:11;
unsigned int shift:4;
unsigned int width:4;
unsigned int monbit:5;
};
#define DDIV_PACK(_offset, _shift, _width, _monbit) \
((struct ddiv){ \
.offset = _offset, \
.shift = _shift, \
.width = _width, \
.monbit = _monbit \
})
#define CPG_CDDIV0 (0x400)
#define CPG_CDDIV1 (0x404)
#define CPG_CDDIV3 (0x40C)
#define CPG_CDDIV4 (0x410)
#define CDDIV0_DIVCTL2 DDIV_PACK(CPG_CDDIV0, 8, 3, 2)
#define CDDIV1_DIVCTL0 DDIV_PACK(CPG_CDDIV1, 0, 2, 4)
#define CDDIV1_DIVCTL1 DDIV_PACK(CPG_CDDIV1, 4, 2, 5)
#define CDDIV1_DIVCTL2 DDIV_PACK(CPG_CDDIV1, 8, 2, 6)
#define CDDIV1_DIVCTL3 DDIV_PACK(CPG_CDDIV1, 12, 2, 7)
#define CDDIV3_DIVCTL3 DDIV_PACK(CPG_CDDIV3, 12, 1, 15)
#define CDDIV4_DIVCTL0 DDIV_PACK(CPG_CDDIV4, 0, 1, 16)
#define CDDIV4_DIVCTL1 DDIV_PACK(CPG_CDDIV4, 4, 1, 17)
#define CDDIV4_DIVCTL2 DDIV_PACK(CPG_CDDIV4, 8, 1, 18)
#define BUS_MSTOP_IDX_MASK GENMASK(31, 16)
#define BUS_MSTOP_BITS_MASK GENMASK(15, 0)
#define BUS_MSTOP(idx, mask) (FIELD_PREP_CONST(BUS_MSTOP_IDX_MASK, (idx)) | \
FIELD_PREP_CONST(BUS_MSTOP_BITS_MASK, (mask)))
#define BUS_MSTOP_NONE GENMASK(31, 0)
/**
* Definitions of CPG Core Clocks
*
* These include:
* - Clock outputs exported to DT
* - External input clocks
* - Internal CPG clocks
*/
struct cpg_core_clk {
const char *name;
unsigned int id;
unsigned int parent;
unsigned int div;
unsigned int mult;
unsigned int type;
union {
unsigned int conf;
struct ddiv ddiv;
} cfg;
const struct clk_div_table *dtable;
u32 flag;
};
enum clk_types {
/* Generic */
CLK_TYPE_IN, /* External Clock Input */
CLK_TYPE_FF, /* Fixed Factor Clock */
CLK_TYPE_PLL,
CLK_TYPE_DDIV, /* Dynamic Switching Divider */
};
/* BIT(31) indicates if CLK1/2 are accessible or not */
#define PLL_CONF(n) (BIT(31) | ((n) & ~GENMASK(31, 16)))
#define PLL_CLK_ACCESS(n) ((n) & BIT(31) ? 1 : 0)
#define PLL_CLK1_OFFSET(n) ((n) & ~GENMASK(31, 16))
#define PLL_CLK2_OFFSET(n) (((n) & ~GENMASK(31, 16)) + (0x4))
#define DEF_TYPE(_name, _id, _type...) \
{ .name = _name, .id = _id, .type = _type }
#define DEF_BASE(_name, _id, _type, _parent...) \
DEF_TYPE(_name, _id, _type, .parent = _parent)
#define DEF_PLL(_name, _id, _parent, _conf) \
DEF_TYPE(_name, _id, CLK_TYPE_PLL, .parent = _parent, .cfg.conf = _conf)
#define DEF_INPUT(_name, _id) \
DEF_TYPE(_name, _id, CLK_TYPE_IN)
#define DEF_FIXED(_name, _id, _parent, _mult, _div) \
DEF_BASE(_name, _id, CLK_TYPE_FF, _parent, .div = _div, .mult = _mult)
#define DEF_DDIV(_name, _id, _parent, _ddiv_packed, _dtable) \
DEF_TYPE(_name, _id, CLK_TYPE_DDIV, \
.cfg.ddiv = _ddiv_packed, \
.parent = _parent, \
.dtable = _dtable, \
.flag = CLK_DIVIDER_HIWORD_MASK)
/**
* struct rzv2h_mod_clk - Module Clocks definitions
*
* @name: handle between common and hardware-specific interfaces
* @mstop_data: packed data mstop register offset and mask
* @parent: id of parent clock
* @critical: flag to indicate the clock is critical
* @no_pm: flag to indicate PM is not supported
* @on_index: control register index
* @on_bit: ON bit
* @mon_index: monitor register index
* @mon_bit: monitor bit
*/
struct rzv2h_mod_clk {
const char *name;
u32 mstop_data;
u16 parent;
bool critical;
bool no_pm;
u8 on_index;
u8 on_bit;
s8 mon_index;
u8 mon_bit;
};
#define DEF_MOD_BASE(_name, _mstop, _parent, _critical, _no_pm, _onindex, _onbit, _monindex, _monbit) \
{ \
.name = (_name), \
.mstop_data = (_mstop), \
.parent = (_parent), \
.critical = (_critical), \
.no_pm = (_no_pm), \
.on_index = (_onindex), \
.on_bit = (_onbit), \
.mon_index = (_monindex), \
.mon_bit = (_monbit), \
}
#define DEF_MOD(_name, _parent, _onindex, _onbit, _monindex, _monbit, _mstop) \
DEF_MOD_BASE(_name, _mstop, _parent, false, false, _onindex, _onbit, _monindex, _monbit)
#define DEF_MOD_CRITICAL(_name, _parent, _onindex, _onbit, _monindex, _monbit, _mstop) \
DEF_MOD_BASE(_name, _mstop, _parent, true, false, _onindex, _onbit, _monindex, _monbit)
#define DEF_MOD_NO_PM(_name, _parent, _onindex, _onbit, _monindex, _monbit, _mstop) \
DEF_MOD_BASE(_name, _mstop, _parent, false, true, _onindex, _onbit, _monindex, _monbit)
/**
* struct rzv2h_reset - Reset definitions
*
* @reset_index: reset register index
* @reset_bit: reset bit
* @mon_index: monitor register index
* @mon_bit: monitor bit
*/
struct rzv2h_reset {
u8 reset_index;
u8 reset_bit;
u8 mon_index;
u8 mon_bit;
};
#define DEF_RST_BASE(_resindex, _resbit, _monindex, _monbit) \
{ \
.reset_index = (_resindex), \
.reset_bit = (_resbit), \
.mon_index = (_monindex), \
.mon_bit = (_monbit), \
}
#define DEF_RST(_resindex, _resbit, _monindex, _monbit) \
DEF_RST_BASE(_resindex, _resbit, _monindex, _monbit)
/**
* struct rzv2h_cpg_info - SoC-specific CPG Description
*
* @core_clks: Array of Core Clock definitions
* @num_core_clks: Number of entries in core_clks[]
* @last_dt_core_clk: ID of the last Core Clock exported to DT
* @num_total_core_clks: Total number of Core Clocks (exported + internal)
*
* @mod_clks: Array of Module Clock definitions
* @num_mod_clks: Number of entries in mod_clks[]
* @num_hw_mod_clks: Number of Module Clocks supported by the hardware
*
* @resets: Array of Module Reset definitions
* @num_resets: Number of entries in resets[]
*
* @num_mstop_bits: Maximum number of MSTOP bits supported, equivalent to the
* number of CPG_BUS_m_MSTOP registers multiplied by 16.
*/
struct rzv2h_cpg_info {
/* Core Clocks */
const struct cpg_core_clk *core_clks;
unsigned int num_core_clks;
unsigned int last_dt_core_clk;
unsigned int num_total_core_clks;
/* Module Clocks */
const struct rzv2h_mod_clk *mod_clks;
unsigned int num_mod_clks;
unsigned int num_hw_mod_clks;
/* Resets */
const struct rzv2h_reset *resets;
unsigned int num_resets;
unsigned int num_mstop_bits;
};
extern const struct rzv2h_cpg_info r9a09g047_cpg_info;
extern const struct rzv2h_cpg_info r9a09g057_cpg_info;
#endif /* __RENESAS_RZV2H_CPG_H__ */
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