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path: root/drivers/regulator/twl4030-regulator.c
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Diffstat (limited to 'drivers/regulator/twl4030-regulator.c')
-rw-r--r--drivers/regulator/twl4030-regulator.c500
1 files changed, 0 insertions, 500 deletions
diff --git a/drivers/regulator/twl4030-regulator.c b/drivers/regulator/twl4030-regulator.c
deleted file mode 100644
index e2032fb60b55..000000000000
--- a/drivers/regulator/twl4030-regulator.c
+++ /dev/null
@@ -1,500 +0,0 @@
-/*
- * 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;
-
- /* 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.
- *
- * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
- * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
- */
-#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,
- 3000, 3000, 3000, 3000,
-};
-static const u16 VAUX4_VSEL_table[] = {
- 700, 1000, 1200, UNSUP(1300),
- 1500, 1800, UNSUP(1850), 2500,
- UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
- UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
-};
-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_list_voltage(struct regulator_dev *rdev, unsigned index)
-{
- struct twlreg_info *info = rdev_get_drvdata(rdev);
- int mV = info->table[index];
-
- return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
-}
-
-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;
-
- /* REVISIT for VAUX2, first match may not be best/lowest */
-
- /* 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 = {
- .list_voltage = twl4030ldo_list_voltage,
-
- .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_list_voltage(struct regulator_dev *rdev, unsigned index)
-{
- struct twlreg_info *info = rdev_get_drvdata(rdev);
-
- return info->min_mV * 1000;
-}
-
-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 = {
- .list_voltage = twl4030fixed_list_voltage,
-
- .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, \
- .n_voltages = ARRAY_SIZE(label##_VSEL_table), \
- .ops = &twl4030ldo_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- }, \
- }
-
-#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
- .base = offset, \
- .id = num, \
- .min_mV = mVolts, \
- .desc = { \
- .name = #label, \
- .id = TWL4030_REG_##label, \
- .n_voltages = 1, \
- .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;
-
- for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
- if (twl4030_regs[i].desc.id != pdev->id)
- continue;
- info = twl4030_regs + i;
- 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;
- 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)
-{
- 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");
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-17 19:54:52 +0000