提交 fa16a5c1 编写于 作者: D David Brownell 提交者: Liam Girdwood

regulator: twl4030 regulators

Support most of the LDO regulators in the twl4030 family chips.
In the case of LDOs supporting MMC/SD, the voltage controls are
used; but in most other cases, the regulator framework is only
used to enable/disable a supplies, conserving power when a given
voltage rail is not needed.

The drivers/mfd/twl4030-core.c code already sets up the various
regulators according to board-specific configuration, and knows
that some chips don't provide the full set of voltage rails.

The omitted regulators are intended to be under hardware control,
such as during the hardware-mediated system powerup, powerdown,
and suspend states.  Unless/until software hooks are known to
be safe, they won't be exported here.

These regulators implement the new get_status() operation, but
can't realistically implement get_mode(); the status output is
effectively the result of a vote, with the relevant hardware
inputs not exposed.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NLiam Girdwood <lrg@slimlogic.co.uk>
上级 3b2a6061
......@@ -56,6 +56,13 @@ config REGULATOR_BQ24022
charging select between 100 mA and 500 mA charging current
limit.
config REGULATOR_TWL4030
bool "TI TWL4030/TWL5030/TPS695x0 PMIC"
depends on TWL4030_CORE
help
This driver supports the voltage regulators provided by
this family of companion chips.
config REGULATOR_WM8350
tristate "Wolfson Microelectroncis WM8350 AudioPlus PMIC"
depends on MFD_WM8350
......
......@@ -8,6 +8,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
obj-$(CONFIG_REGULATOR_TWL4030) += twl4030-regulator.o
obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
......
/*
* twl4030-regulator.c -- support regulators in twl4030 family chips
*
* Copyright (C) 2008 David Brownell
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/i2c/twl4030.h>
/*
* The TWL4030/TW5030/TPS659x0 family chips include power management, a
* USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
* include an audio codec, battery charger, and more voltage regulators.
* These chips are often used in OMAP-based systems.
*
* This driver implements software-based resource control for various
* voltage regulators. This is usually augmented with state machine
* based control.
*/
struct twlreg_info {
/* start of regulator's PM_RECEIVER control register bank */
u8 base;
/* twl4030 resource ID, for resource control state machine */
u8 id;
/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
u8 table_len;
const u16 *table;
/* chip constraints on regulator behavior */
u16 min_mV;
u16 max_mV;
/* used by regulator core */
struct regulator_desc desc;
};
/* LDO control registers ... offset is from the base of its register bank.
* The first three registers of all power resource banks help hardware to
* manage the various resource groups.
*/
#define VREG_GRP 0
#define VREG_TYPE 1
#define VREG_REMAP 2
#define VREG_DEDICATED 3 /* LDO control */
static inline int
twl4030reg_read(struct twlreg_info *info, unsigned offset)
{
u8 value;
int status;
status = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
&value, info->base + offset);
return (status < 0) ? status : value;
}
static inline int
twl4030reg_write(struct twlreg_info *info, unsigned offset, u8 value)
{
return twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
value, info->base + offset);
}
/*----------------------------------------------------------------------*/
/* generic power resource operations, which work on all regulators */
static int twl4030reg_grp(struct regulator_dev *rdev)
{
return twl4030reg_read(rdev_get_drvdata(rdev), VREG_GRP);
}
/*
* Enable/disable regulators by joining/leaving the P1 (processor) group.
* We assume nobody else is updating the DEV_GRP registers.
*/
#define P3_GRP BIT(7) /* "peripherals" */
#define P2_GRP BIT(6) /* secondary processor, modem, etc */
#define P1_GRP BIT(5) /* CPU/Linux */
static int twl4030reg_is_enabled(struct regulator_dev *rdev)
{
int state = twl4030reg_grp(rdev);
if (state < 0)
return state;
return (state & P1_GRP) != 0;
}
static int twl4030reg_enable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp;
grp = twl4030reg_read(info, VREG_GRP);
if (grp < 0)
return grp;
grp |= P1_GRP;
return twl4030reg_write(info, VREG_GRP, grp);
}
static int twl4030reg_disable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp;
grp = twl4030reg_read(info, VREG_GRP);
if (grp < 0)
return grp;
grp &= ~P1_GRP;
return twl4030reg_write(info, VREG_GRP, grp);
}
static int twl4030reg_get_status(struct regulator_dev *rdev)
{
int state = twl4030reg_grp(rdev);
if (state < 0)
return state;
state &= 0x0f;
/* assume state != WARM_RESET; we'd not be running... */
if (!state)
return REGULATOR_STATUS_OFF;
return (state & BIT(3))
? REGULATOR_STATUS_NORMAL
: REGULATOR_STATUS_STANDBY;
}
static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
unsigned message;
int status;
/* We can only set the mode through state machine commands... */
switch (mode) {
case REGULATOR_MODE_NORMAL:
message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
break;
case REGULATOR_MODE_STANDBY:
message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
break;
default:
return -EINVAL;
}
/* Ensure the resource is associated with some group */
status = twl4030reg_grp(rdev);
if (status < 0)
return status;
if (!(status & (P3_GRP | P2_GRP | P1_GRP)))
return -EACCES;
status = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
message >> 8, 0x15 /* PB_WORD_MSB */ );
if (status >= 0)
return status;
return twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
message, 0x16 /* PB_WORD_LSB */ );
}
/*----------------------------------------------------------------------*/
/*
* Support for adjustable-voltage LDOs uses a four bit (or less) voltage
* select field in its control register. We use tables indexed by VSEL
* to record voltages in milliVolts. (Accuracy is about three percent.)
*
* Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
* currently handled by listing two slightly different VAUX2 regulators,
* only one of which will be configured.
*
* VSEL values documented as "TI cannot support these values" are flagged
* in these tables as UNSUP() values; we normally won't assign them.
*/
#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
#define UNSUP_MASK 0x0000
#else
#define UNSUP_MASK 0x8000
#endif
#define UNSUP(x) (UNSUP_MASK | (x))
#define IS_UNSUP(x) (UNSUP_MASK & (x))
#define LDO_MV(x) (~UNSUP_MASK & (x))
static const u16 VAUX1_VSEL_table[] = {
UNSUP(1500), UNSUP(1800), 2500, 2800,
3000, 3000, 3000, 3000,
};
static const u16 VAUX2_4030_VSEL_table[] = {
UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
1500, 1800, UNSUP(1850), 2500,
UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VAUX2_VSEL_table[] = {
1700, 1700, 1900, 1300,
1500, 1800, 2000, 2500,
2100, 2800, 2200, 2300,
2400, 2400, 2400, 2400,
};
static const u16 VAUX3_VSEL_table[] = {
1500, 1800, 2500, 2800,
UNSUP(3000), UNSUP(3000), UNSUP(3000), UNSUP(3000),
};
static const u16 VAUX4_VSEL_table[] = {
700, 1000, 1200, UNSUP(1300),
1500, 1800, UNSUP(1850), 2500,
};
static const u16 VMMC1_VSEL_table[] = {
1850, 2850, 3000, 3150,
};
static const u16 VMMC2_VSEL_table[] = {
UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
2600, 2800, 2850, 3000,
3150, 3150, 3150, 3150,
};
static const u16 VPLL1_VSEL_table[] = {
1000, 1200, 1300, 1800,
UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
};
static const u16 VPLL2_VSEL_table[] = {
700, 1000, 1200, 1300,
UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VSIM_VSEL_table[] = {
UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
2800, 3000, 3000, 3000,
};
static const u16 VDAC_VSEL_table[] = {
1200, 1300, 1800, 1800,
};
static int
twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel;
for (vsel = 0; vsel < info->table_len; vsel++) {
int mV = info->table[vsel];
int uV;
if (IS_UNSUP(mV))
continue;
uV = LDO_MV(mV) * 1000;
/* use the first in-range value */
if (min_uV <= uV && uV <= max_uV)
return twl4030reg_write(info, VREG_DEDICATED, vsel);
}
return -EDOM;
}
static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = twl4030reg_read(info, VREG_DEDICATED);
if (vsel < 0)
return vsel;
vsel &= info->table_len - 1;
return LDO_MV(info->table[vsel]) * 1000;
}
static struct regulator_ops twl4030ldo_ops = {
.set_voltage = twl4030ldo_set_voltage,
.get_voltage = twl4030ldo_get_voltage,
.enable = twl4030reg_enable,
.disable = twl4030reg_disable,
.is_enabled = twl4030reg_is_enabled,
.set_mode = twl4030reg_set_mode,
.get_status = twl4030reg_get_status,
};
/*----------------------------------------------------------------------*/
/*
* Fixed voltage LDOs don't have a VSEL field to update.
*/
static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
return info->min_mV * 1000;
}
static struct regulator_ops twl4030fixed_ops = {
.get_voltage = twl4030fixed_get_voltage,
.enable = twl4030reg_enable,
.disable = twl4030reg_disable,
.is_enabled = twl4030reg_is_enabled,
.set_mode = twl4030reg_set_mode,
.get_status = twl4030reg_get_status,
};
/*----------------------------------------------------------------------*/
#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
.base = offset, \
.id = num, \
.table_len = ARRAY_SIZE(label##_VSEL_table), \
.table = label##_VSEL_table, \
.desc = { \
.name = #label, \
.id = TWL4030_REG_##label, \
.ops = &twl4030ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
.base = offset, \
.id = num, \
.min_mV = mVolts, \
.max_mV = mVolts, \
.desc = { \
.name = #label, \
.id = TWL4030_REG_##label, \
.ops = &twl4030fixed_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
/*
* We list regulators here if systems need some level of
* software control over them after boot.
*/
static struct twlreg_info twl4030_regs[] = {
TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
/*
TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
*/
TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
/*
TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
TWL_SMPS(VIO, 0x4b, 14),
TWL_SMPS(VDD1, 0x55, 15),
TWL_SMPS(VDD2, 0x63, 16),
*/
TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
/* VUSBCP is managed *only* by the USB subchip */
};
static int twl4030reg_probe(struct platform_device *pdev)
{
int i;
struct twlreg_info *info;
struct regulator_init_data *initdata;
struct regulation_constraints *c;
struct regulator_dev *rdev;
int min_uV, max_uV;
for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
if (twl4030_regs[i].desc.id != pdev->id)
continue;
info = twl4030_regs + i;
min_uV = info->min_mV * 1000;
max_uV = info->max_mV * 1000;
break;
}
if (!info)
return -ENODEV;
initdata = pdev->dev.platform_data;
if (!initdata)
return -EINVAL;
/* Constrain board-specific capabilities according to what
* this driver and the chip itself can actually do.
*/
c = &initdata->constraints;
if (!c->min_uV || c->min_uV < min_uV)
c->min_uV = min_uV;
if (!c->max_uV || c->max_uV > max_uV)
c->max_uV = max_uV;
c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
| REGULATOR_CHANGE_MODE
| REGULATOR_CHANGE_STATUS;
rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "can't register %s, %ld\n",
info->desc.name, PTR_ERR(rdev));
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
/* NOTE: many regulators support short-circuit IRQs (presentable
* as REGULATOR_OVER_CURRENT notifications?) configured via:
* - SC_CONFIG
* - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
* - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
* - IT_CONFIG
*/
return 0;
}
static int __devexit twl4030reg_remove(struct platform_device *pdev)
{
regulator_unregister(platform_get_drvdata(pdev));
return 0;
}
MODULE_ALIAS("platform:twl4030_reg");
static struct platform_driver twl4030reg_driver = {
.probe = twl4030reg_probe,
.remove = __devexit_p(twl4030reg_remove),
/* NOTE: short name, to work around driver model truncation of
* "twl4030_regulator.12" (and friends) to "twl4030_regulator.1".
*/
.driver.name = "twl4030_reg",
.driver.owner = THIS_MODULE,
};
static int __init twl4030reg_init(void)
{
unsigned i, j;
/* determine min/max voltage constraints, taking into account
* whether set_voltage() will use the "unsupported" settings
*/
for (i = 0; i < ARRAY_SIZE(twl4030_regs); i++) {
struct twlreg_info *info = twl4030_regs + i;
const u16 *table;
/* fixed-voltage regulators */
if (!info->table_len)
continue;
/* LDO regulators: */
for (j = 0, table = info->table;
j < info->table_len;
j++, table++) {
u16 mV = *table;
if (IS_UNSUP(mV))
continue;
mV = LDO_MV(mV);
if (info->min_mV == 0 || info->min_mV > mV)
info->min_mV = mV;
if (info->max_mV < mV)
info->max_mV = mV;
}
}
return platform_driver_register(&twl4030reg_driver);
}
subsys_initcall(twl4030reg_init);
static void __exit twl4030reg_exit(void)
{
platform_driver_unregister(&twl4030reg_driver);
}
module_exit(twl4030reg_exit)
MODULE_DESCRIPTION("TWL4030 regulator driver");
MODULE_LICENSE("GPL");
......@@ -218,6 +218,53 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
/*----------------------------------------------------------------------*/
/* Power bus message definitions */
#define DEV_GRP_NULL 0x0
#define DEV_GRP_P1 0x1
#define DEV_GRP_P2 0x2
#define DEV_GRP_P3 0x4
#define RES_GRP_RES 0x0
#define RES_GRP_PP 0x1
#define RES_GRP_RC 0x2
#define RES_GRP_PP_RC 0x3
#define RES_GRP_PR 0x4
#define RES_GRP_PP_PR 0x5
#define RES_GRP_RC_PR 0x6
#define RES_GRP_ALL 0x7
#define RES_TYPE2_R0 0x0
#define RES_TYPE_ALL 0x7
#define RES_STATE_WRST 0xF
#define RES_STATE_ACTIVE 0xE
#define RES_STATE_SLEEP 0x8
#define RES_STATE_OFF 0x0
/*
* Power Bus Message Format ... these can be sent individually by Linux,
* but are usually part of downloaded scripts that are run when various
* power events are triggered.
*
* Broadcast Message (16 Bits):
* DEV_GRP[15:13] MT[12] RES_GRP[11:9] RES_TYPE2[8:7] RES_TYPE[6:4]
* RES_STATE[3:0]
*
* Singular Message (16 Bits):
* DEV_GRP[15:13] MT[12] RES_ID[11:4] RES_STATE[3:0]
*/
#define MSG_BROADCAST(devgrp, grp, type, type2, state) \
( (devgrp) << 13 | 1 << 12 | (grp) << 9 | (type2) << 7 \
| (type) << 4 | (state))
#define MSG_SINGULAR(devgrp, id, state) \
((devgrp) << 13 | 0 << 12 | (id) << 4 | (state))
/*----------------------------------------------------------------------*/
struct twl4030_bci_platform_data {
int *battery_tmp_tbl;
unsigned int tblsize;
......
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