diff options
Diffstat (limited to 'kernel/arch/arm/mach-omap2/voltage.h')
| -rw-r--r-- | kernel/arch/arm/mach-omap2/voltage.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/voltage.h b/kernel/arch/arm/mach-omap2/voltage.h new file mode 100644 index 000000000..e64550321 --- /dev/null +++ b/kernel/arch/arm/mach-omap2/voltage.h @@ -0,0 +1,173 @@ +/* + * OMAP Voltage Management Routines + * + * Author: Thara Gopinath <thara@ti.com> + * + * Copyright (C) 2009 Texas Instruments, Inc. + * Thara Gopinath <thara@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H +#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H + +#include <linux/err.h> + +#include <linux/platform_data/voltage-omap.h> + +#include "vc.h" +#include "vp.h" + +struct powerdomain; + +/* + * OMAP3 GENERIC setup times. Revisit to see if these needs to be + * passed from board or PMIC file + */ +#define OMAP3_CLKSETUP 0xff +#define OMAP3_VOLTOFFSET 0xff +#define OMAP3_VOLTSETUP2 0xff + +/** + * struct omap_vfsm_instance - per-voltage manager FSM register/bitfield + * data + * @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register + * @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base + * @voltsetup_off_reg: register offset of PRM_VOLTSETUP_OFF from PRM base + * + * XXX What about VOLTOFFSET/VOLTCTRL? + */ +struct omap_vfsm_instance { + u32 voltsetup_mask; + u8 voltsetup_reg; + u8 voltsetup_off_reg; +}; + +/** + * struct voltagedomain - omap voltage domain global structure. + * @name: Name of the voltage domain which can be used as a unique identifier. + * @scalable: Whether or not this voltage domain is scalable + * @node: list_head linking all voltage domains + * @vc: pointer to VC channel associated with this voltagedomain + * @vp: pointer to VP associated with this voltagedomain + * @read: read a VC/VP register + * @write: write a VC/VP register + * @read: read-modify-write a VC/VP register + * @sys_clk: system clock name/frequency, used for various timing calculations + * @scale: function used to scale the voltage of the voltagedomain + * @nominal_volt: current nominal voltage for this voltage domain + * @volt_data: voltage table having the distinct voltages supported + * by the domain and other associated per voltage data. + */ +struct voltagedomain { + char *name; + bool scalable; + struct list_head node; + struct omap_vc_channel *vc; + const struct omap_vfsm_instance *vfsm; + struct omap_vp_instance *vp; + struct omap_voltdm_pmic *pmic; + struct omap_vp_param *vp_param; + struct omap_vc_param *vc_param; + + /* VC/VP register access functions: SoC specific */ + u32 (*read) (u8 offset); + void (*write) (u32 val, u8 offset); + u32 (*rmw)(u32 mask, u32 bits, u8 offset); + + union { + const char *name; + u32 rate; + } sys_clk; + + int (*scale) (struct voltagedomain *voltdm, + unsigned long target_volt); + + u32 nominal_volt; + struct omap_volt_data *volt_data; +}; + +/* Min and max voltages from OMAP perspective */ +#define OMAP3430_VP1_VLIMITTO_VDDMIN 850000 +#define OMAP3430_VP1_VLIMITTO_VDDMAX 1425000 +#define OMAP3430_VP2_VLIMITTO_VDDMIN 900000 +#define OMAP3430_VP2_VLIMITTO_VDDMAX 1150000 + +#define OMAP3630_VP1_VLIMITTO_VDDMIN 900000 +#define OMAP3630_VP1_VLIMITTO_VDDMAX 1350000 +#define OMAP3630_VP2_VLIMITTO_VDDMIN 900000 +#define OMAP3630_VP2_VLIMITTO_VDDMAX 1200000 + +#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 830000 +#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 1410000 +#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 830000 +#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 1260000 +#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000 +#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000 + +/** + * struct omap_voltdm_pmic - PMIC specific data required by voltage driver. + * @slew_rate: PMIC slew rate (in uv/us) + * @step_size: PMIC voltage step size (in uv) + * @i2c_slave_addr: I2C slave address of PMIC + * @volt_reg_addr: voltage configuration register address + * @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address + * @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC + * @i2c_mcode: master code value for I2C high-speed preamble transmission + * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV. + * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value. + */ +struct omap_voltdm_pmic { + int slew_rate; + int step_size; + u16 i2c_slave_addr; + u16 volt_reg_addr; + u16 cmd_reg_addr; + u8 vp_erroroffset; + u8 vp_vstepmin; + u8 vp_vstepmax; + u32 vddmin; + u32 vddmax; + u8 vp_timeout_us; + bool i2c_high_speed; + u32 i2c_pad_load; + u8 i2c_mcode; + unsigned long (*vsel_to_uv) (const u8 vsel); + u8 (*uv_to_vsel) (unsigned long uV); +}; + +struct omap_vp_param { + u32 vddmax; + u32 vddmin; +}; + +struct omap_vc_param { + u32 on; + u32 onlp; + u32 ret; + u32 off; +}; + +void omap_voltage_get_volttable(struct voltagedomain *voltdm, + struct omap_volt_data **volt_data); +struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, + unsigned long volt); +int omap_voltage_register_pmic(struct voltagedomain *voltdm, + struct omap_voltdm_pmic *pmic); +int omap_voltage_late_init(void); + +extern void omap2xxx_voltagedomains_init(void); +extern void omap3xxx_voltagedomains_init(void); +extern void omap44xx_voltagedomains_init(void); +extern void omap54xx_voltagedomains_init(void); + +struct voltagedomain *voltdm_lookup(const char *name); +void voltdm_init(struct voltagedomain **voltdm_list); +int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm); +int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt); +void voltdm_reset(struct voltagedomain *voltdm); +unsigned long voltdm_get_voltage(struct voltagedomain *voltdm); +#endif |