/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* OMAP Voltage Management Routines
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*
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* Author: Thara Gopinath <thara@ti.com>
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*
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* Copyright (C) 2009 Texas Instruments, Inc.
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* Thara Gopinath <thara@ti.com>
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
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#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
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#include <linux/err.h>
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#include <linux/platform_data/voltage-omap.h>
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#include "vc.h"
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#include "vp.h"
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struct powerdomain;
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/*
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* OMAP3 GENERIC setup times. Revisit to see if these needs to be
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* passed from board or PMIC file
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*/
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#define OMAP3_CLKSETUP 0xff
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#define OMAP3_VOLTOFFSET 0xff
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#define OMAP3_VOLTSETUP2 0xff
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/**
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* struct omap_vfsm_instance - per-voltage manager FSM register/bitfield
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* data
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* @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register
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* @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base
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* @voltsetup_off_reg: register offset of PRM_VOLTSETUP_OFF from PRM base
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*
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* XXX What about VOLTOFFSET/VOLTCTRL?
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*/
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struct omap_vfsm_instance {
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u32 voltsetup_mask;
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u8 voltsetup_reg;
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u8 voltsetup_off_reg;
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};
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/**
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* struct voltagedomain - omap voltage domain global structure.
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* @name: Name of the voltage domain which can be used as a unique identifier.
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* @scalable: Whether or not this voltage domain is scalable
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* @node: list_head linking all voltage domains
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* @vc: pointer to VC channel associated with this voltagedomain
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* @vp: pointer to VP associated with this voltagedomain
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* @read: read a VC/VP register
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* @write: write a VC/VP register
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* @read: read-modify-write a VC/VP register
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* @sys_clk: system clock name/frequency, used for various timing calculations
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* @scale: function used to scale the voltage of the voltagedomain
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* @nominal_volt: current nominal voltage for this voltage domain
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* @volt_data: voltage table having the distinct voltages supported
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* by the domain and other associated per voltage data.
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*/
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struct voltagedomain {
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char *name;
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bool scalable;
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struct list_head node;
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struct omap_vc_channel *vc;
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const struct omap_vfsm_instance *vfsm;
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struct omap_vp_instance *vp;
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struct omap_voltdm_pmic *pmic;
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struct omap_vp_param *vp_param;
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struct omap_vc_param *vc_param;
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/* VC/VP register access functions: SoC specific */
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u32 (*read) (u8 offset);
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void (*write) (u32 val, u8 offset);
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u32 (*rmw)(u32 mask, u32 bits, u8 offset);
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union {
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const char *name;
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u32 rate;
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} sys_clk;
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int (*scale) (struct voltagedomain *voltdm,
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unsigned long target_volt);
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u32 nominal_volt;
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struct omap_volt_data *volt_data;
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};
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/* Min and max voltages from OMAP perspective */
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#define OMAP3430_VP1_VLIMITTO_VDDMIN 850000
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#define OMAP3430_VP1_VLIMITTO_VDDMAX 1425000
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#define OMAP3430_VP2_VLIMITTO_VDDMIN 900000
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#define OMAP3430_VP2_VLIMITTO_VDDMAX 1150000
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#define OMAP3630_VP1_VLIMITTO_VDDMIN 900000
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#define OMAP3630_VP1_VLIMITTO_VDDMAX 1350000
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#define OMAP3630_VP2_VLIMITTO_VDDMIN 900000
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#define OMAP3630_VP2_VLIMITTO_VDDMAX 1200000
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#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 830000
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#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 1410000
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#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 830000
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#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 1260000
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#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000
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#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000
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/**
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* struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
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* @slew_rate: PMIC slew rate (in uv/us)
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* @step_size: PMIC voltage step size (in uv)
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* @i2c_slave_addr: I2C slave address of PMIC
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* @volt_reg_addr: voltage configuration register address
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* @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address
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* @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC
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* @i2c_mcode: master code value for I2C high-speed preamble transmission
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* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
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* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
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*/
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struct omap_voltdm_pmic {
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int slew_rate;
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int step_size;
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u16 i2c_slave_addr;
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u16 volt_reg_addr;
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u16 cmd_reg_addr;
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u8 vp_erroroffset;
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u8 vp_vstepmin;
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u8 vp_vstepmax;
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u32 vddmin;
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u32 vddmax;
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u8 vp_timeout_us;
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bool i2c_high_speed;
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u32 i2c_pad_load;
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u8 i2c_mcode;
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unsigned long (*vsel_to_uv) (const u8 vsel);
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u8 (*uv_to_vsel) (unsigned long uV);
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};
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struct omap_vp_param {
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u32 vddmax;
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u32 vddmin;
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};
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struct omap_vc_param {
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u32 on;
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u32 onlp;
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u32 ret;
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u32 off;
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};
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void omap_voltage_get_volttable(struct voltagedomain *voltdm,
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struct omap_volt_data **volt_data);
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struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
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unsigned long volt);
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int omap_voltage_register_pmic(struct voltagedomain *voltdm,
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struct omap_voltdm_pmic *pmic);
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int omap_voltage_late_init(void);
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extern void omap2xxx_voltagedomains_init(void);
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extern void omap3xxx_voltagedomains_init(void);
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extern void omap44xx_voltagedomains_init(void);
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extern void omap54xx_voltagedomains_init(void);
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struct voltagedomain *voltdm_lookup(const char *name);
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void voltdm_init(struct voltagedomain **voltdm_list);
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int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
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int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt);
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void voltdm_reset(struct voltagedomain *voltdm);
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unsigned long voltdm_get_voltage(struct voltagedomain *voltdm);
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#endif
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