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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: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
David Brownell
Liam Girdwood
parent
3b2a6061af
commit
fa16a5c13a
@ -56,6 +56,13 @@ config REGULATOR_BQ24022
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charging select between 100 mA and 500 mA charging current
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limit.
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config REGULATOR_TWL4030
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bool "TI TWL4030/TWL5030/TPS695x0 PMIC"
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depends on TWL4030_CORE
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help
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This driver supports the voltage regulators provided by
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this family of companion chips.
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config REGULATOR_WM8350
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tristate "Wolfson Microelectroncis WM8350 AudioPlus PMIC"
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depends on MFD_WM8350
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@ -8,6 +8,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
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obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
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obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
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obj-$(CONFIG_REGULATOR_TWL4030) += twl4030-regulator.o
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obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
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obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
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obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
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511
drivers/regulator/twl4030-regulator.c
Normal file
511
drivers/regulator/twl4030-regulator.c
Normal file
@ -0,0 +1,511 @@
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/*
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* twl4030-regulator.c -- support regulators in twl4030 family chips
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*
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* Copyright (C) 2008 David Brownell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/i2c/twl4030.h>
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/*
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* The TWL4030/TW5030/TPS659x0 family chips include power management, a
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* USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
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* include an audio codec, battery charger, and more voltage regulators.
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* These chips are often used in OMAP-based systems.
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*
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* This driver implements software-based resource control for various
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* voltage regulators. This is usually augmented with state machine
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* based control.
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*/
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struct twlreg_info {
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/* start of regulator's PM_RECEIVER control register bank */
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u8 base;
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/* twl4030 resource ID, for resource control state machine */
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u8 id;
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/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
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u8 table_len;
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const u16 *table;
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/* chip constraints on regulator behavior */
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u16 min_mV;
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u16 max_mV;
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/* used by regulator core */
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struct regulator_desc desc;
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};
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/* LDO control registers ... offset is from the base of its register bank.
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* The first three registers of all power resource banks help hardware to
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* manage the various resource groups.
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*/
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#define VREG_GRP 0
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#define VREG_TYPE 1
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#define VREG_REMAP 2
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#define VREG_DEDICATED 3 /* LDO control */
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static inline int
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twl4030reg_read(struct twlreg_info *info, unsigned offset)
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{
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u8 value;
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int status;
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status = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
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&value, info->base + offset);
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return (status < 0) ? status : value;
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}
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static inline int
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twl4030reg_write(struct twlreg_info *info, unsigned offset, u8 value)
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{
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return twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
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value, info->base + offset);
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}
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/*----------------------------------------------------------------------*/
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/* generic power resource operations, which work on all regulators */
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static int twl4030reg_grp(struct regulator_dev *rdev)
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{
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return twl4030reg_read(rdev_get_drvdata(rdev), VREG_GRP);
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}
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/*
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* Enable/disable regulators by joining/leaving the P1 (processor) group.
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* We assume nobody else is updating the DEV_GRP registers.
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*/
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#define P3_GRP BIT(7) /* "peripherals" */
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#define P2_GRP BIT(6) /* secondary processor, modem, etc */
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#define P1_GRP BIT(5) /* CPU/Linux */
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static int twl4030reg_is_enabled(struct regulator_dev *rdev)
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{
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int state = twl4030reg_grp(rdev);
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if (state < 0)
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return state;
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return (state & P1_GRP) != 0;
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}
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static int twl4030reg_enable(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int grp;
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grp = twl4030reg_read(info, VREG_GRP);
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if (grp < 0)
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return grp;
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grp |= P1_GRP;
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return twl4030reg_write(info, VREG_GRP, grp);
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}
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static int twl4030reg_disable(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int grp;
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grp = twl4030reg_read(info, VREG_GRP);
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if (grp < 0)
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return grp;
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grp &= ~P1_GRP;
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return twl4030reg_write(info, VREG_GRP, grp);
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}
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static int twl4030reg_get_status(struct regulator_dev *rdev)
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{
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int state = twl4030reg_grp(rdev);
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if (state < 0)
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return state;
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state &= 0x0f;
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/* assume state != WARM_RESET; we'd not be running... */
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if (!state)
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return REGULATOR_STATUS_OFF;
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return (state & BIT(3))
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? REGULATOR_STATUS_NORMAL
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: REGULATOR_STATUS_STANDBY;
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}
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static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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unsigned message;
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int status;
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/* We can only set the mode through state machine commands... */
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
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break;
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case REGULATOR_MODE_STANDBY:
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message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
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break;
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default:
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return -EINVAL;
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}
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/* Ensure the resource is associated with some group */
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status = twl4030reg_grp(rdev);
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if (status < 0)
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return status;
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if (!(status & (P3_GRP | P2_GRP | P1_GRP)))
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return -EACCES;
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status = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
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message >> 8, 0x15 /* PB_WORD_MSB */ );
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if (status >= 0)
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return status;
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return twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
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message, 0x16 /* PB_WORD_LSB */ );
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}
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/*----------------------------------------------------------------------*/
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/*
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* Support for adjustable-voltage LDOs uses a four bit (or less) voltage
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* select field in its control register. We use tables indexed by VSEL
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* to record voltages in milliVolts. (Accuracy is about three percent.)
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*
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* Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
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* currently handled by listing two slightly different VAUX2 regulators,
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* only one of which will be configured.
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*
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* VSEL values documented as "TI cannot support these values" are flagged
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* in these tables as UNSUP() values; we normally won't assign them.
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*/
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#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
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#define UNSUP_MASK 0x0000
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#else
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#define UNSUP_MASK 0x8000
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#endif
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#define UNSUP(x) (UNSUP_MASK | (x))
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#define IS_UNSUP(x) (UNSUP_MASK & (x))
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#define LDO_MV(x) (~UNSUP_MASK & (x))
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static const u16 VAUX1_VSEL_table[] = {
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UNSUP(1500), UNSUP(1800), 2500, 2800,
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3000, 3000, 3000, 3000,
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};
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static const u16 VAUX2_4030_VSEL_table[] = {
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UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
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1500, 1800, UNSUP(1850), 2500,
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UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
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UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
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};
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static const u16 VAUX2_VSEL_table[] = {
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1700, 1700, 1900, 1300,
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1500, 1800, 2000, 2500,
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2100, 2800, 2200, 2300,
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2400, 2400, 2400, 2400,
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};
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static const u16 VAUX3_VSEL_table[] = {
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1500, 1800, 2500, 2800,
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UNSUP(3000), UNSUP(3000), UNSUP(3000), UNSUP(3000),
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};
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static const u16 VAUX4_VSEL_table[] = {
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700, 1000, 1200, UNSUP(1300),
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1500, 1800, UNSUP(1850), 2500,
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};
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static const u16 VMMC1_VSEL_table[] = {
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1850, 2850, 3000, 3150,
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};
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static const u16 VMMC2_VSEL_table[] = {
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UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
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UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
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2600, 2800, 2850, 3000,
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3150, 3150, 3150, 3150,
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};
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static const u16 VPLL1_VSEL_table[] = {
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1000, 1200, 1300, 1800,
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UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
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};
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static const u16 VPLL2_VSEL_table[] = {
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700, 1000, 1200, 1300,
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UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
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UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
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UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
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};
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static const u16 VSIM_VSEL_table[] = {
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UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
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2800, 3000, 3000, 3000,
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};
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static const u16 VDAC_VSEL_table[] = {
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1200, 1300, 1800, 1800,
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};
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static int
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twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int vsel;
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for (vsel = 0; vsel < info->table_len; vsel++) {
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int mV = info->table[vsel];
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int uV;
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if (IS_UNSUP(mV))
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continue;
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uV = LDO_MV(mV) * 1000;
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/* use the first in-range value */
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if (min_uV <= uV && uV <= max_uV)
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return twl4030reg_write(info, VREG_DEDICATED, vsel);
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}
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return -EDOM;
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}
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static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int vsel = twl4030reg_read(info, VREG_DEDICATED);
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if (vsel < 0)
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return vsel;
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vsel &= info->table_len - 1;
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return LDO_MV(info->table[vsel]) * 1000;
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}
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static struct regulator_ops twl4030ldo_ops = {
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.set_voltage = twl4030ldo_set_voltage,
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.get_voltage = twl4030ldo_get_voltage,
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.enable = twl4030reg_enable,
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.disable = twl4030reg_disable,
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.is_enabled = twl4030reg_is_enabled,
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.set_mode = twl4030reg_set_mode,
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.get_status = twl4030reg_get_status,
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};
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/*----------------------------------------------------------------------*/
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/*
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* Fixed voltage LDOs don't have a VSEL field to update.
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*/
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static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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return info->min_mV * 1000;
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}
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static struct regulator_ops twl4030fixed_ops = {
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.get_voltage = twl4030fixed_get_voltage,
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.enable = twl4030reg_enable,
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.disable = twl4030reg_disable,
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.is_enabled = twl4030reg_is_enabled,
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.set_mode = twl4030reg_set_mode,
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.get_status = twl4030reg_get_status,
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};
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/*----------------------------------------------------------------------*/
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#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
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.base = offset, \
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.id = num, \
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.table_len = ARRAY_SIZE(label##_VSEL_table), \
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.table = label##_VSEL_table, \
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.desc = { \
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.name = #label, \
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.id = TWL4030_REG_##label, \
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.ops = &twl4030ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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}, \
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}
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#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
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.base = offset, \
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.id = num, \
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.min_mV = mVolts, \
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.max_mV = mVolts, \
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.desc = { \
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.name = #label, \
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.id = TWL4030_REG_##label, \
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.ops = &twl4030fixed_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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}, \
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}
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/*
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* We list regulators here if systems need some level of
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* software control over them after boot.
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*/
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static struct twlreg_info twl4030_regs[] = {
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TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
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TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
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TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
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TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
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TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
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TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
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TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
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/*
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TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
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TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
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*/
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TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
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TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
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/*
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TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
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TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
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TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
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TWL_SMPS(VIO, 0x4b, 14),
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TWL_SMPS(VDD1, 0x55, 15),
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TWL_SMPS(VDD2, 0x63, 16),
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*/
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TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
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TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
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TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
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/* VUSBCP is managed *only* by the USB subchip */
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};
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static int twl4030reg_probe(struct platform_device *pdev)
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{
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int i;
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struct twlreg_info *info;
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struct regulator_init_data *initdata;
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struct regulation_constraints *c;
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struct regulator_dev *rdev;
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int min_uV, max_uV;
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for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
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if (twl4030_regs[i].desc.id != pdev->id)
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continue;
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info = twl4030_regs + i;
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min_uV = info->min_mV * 1000;
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max_uV = info->max_mV * 1000;
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break;
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}
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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;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user