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regulator: Add support for twl6030 regulators
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This patch updates the regulator driver to add support
for TWL6030 PMIC specific LDO regulators.
SMPS resources are not yet supported for TWL6030 and
also .set_mode and .get_status for LDO's are yet to
be implemented for TWL6030.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Rajendra Nayak authored and Samuel Ortiz committed Dec 13, 2009
1 parent a6b49ff commit 441a450
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Showing 3 changed files with 130 additions and 22 deletions.
2 changes: 1 addition & 1 deletion drivers/regulator/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,7 @@ config REGULATOR_MAX1586
for PXA27x chips to control VCC_CORE and VCC_USIM voltages.

config REGULATOR_TWL4030
bool "TI TWL4030/TWL5030/TPS695x0 PMIC"
bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC"
depends on TWL4030_CORE
help
This driver supports the voltage regulators provided by
Expand Down
116 changes: 95 additions & 21 deletions drivers/regulator/twl-regulator.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -52,27 +52,38 @@ struct twlreg_info {
* The first three registers of all power resource banks help hardware to
* manage the various resource groups.
*/
/* Common offset in TWL4030/6030 */
#define VREG_GRP 0
/* TWL4030 register offsets */
#define VREG_TYPE 1
#define VREG_REMAP 2
#define VREG_DEDICATED 3 /* LDO control */

/* TWL6030 register offsets */
#define VREG_TRANS 1
#define VREG_STATE 2
#define VREG_VOLTAGE 3
/* TWL6030 Misc register offsets */
#define VREG_BC_ALL 1
#define VREG_BC_REF 2
#define VREG_BC_PROC 3
#define VREG_BC_CLK_RST 4

static inline int
twlreg_read(struct twlreg_info *info, unsigned offset)
twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
{
u8 value;
int status;

status = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER,
status = twl_i2c_read_u8(slave_subgp,
&value, info->base + offset);
return (status < 0) ? status : value;
}

static inline int
twlreg_write(struct twlreg_info *info, unsigned offset, u8 value)
twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
u8 value)
{
return twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
return twl_i2c_write_u8(slave_subgp,
value, info->base + offset);
}

Expand All @@ -82,17 +93,22 @@ twlreg_write(struct twlreg_info *info, unsigned offset, u8 value)

static int twlreg_grp(struct regulator_dev *rdev)
{
return twlreg_read(rdev_get_drvdata(rdev), VREG_GRP);
return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
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 */
/* definition for 4030 family */
#define P3_GRP_4030 BIT(7) /* "peripherals" */
#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
#define P1_GRP_4030 BIT(5) /* CPU/Linux */
/* definition for 6030 family */
#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
#define P2_GRP_6030 BIT(1) /* "peripherals" */
#define P1_GRP_6030 BIT(0) /* CPU/Linux */

static int twlreg_is_enabled(struct regulator_dev *rdev)
{
Expand All @@ -101,39 +117,54 @@ static int twlreg_is_enabled(struct regulator_dev *rdev)
if (state < 0)
return state;

return (state & P1_GRP) != 0;
if (twl_class_is_4030())
state &= P1_GRP_4030;
else
state &= P1_GRP_6030;
return state;
}

static int twlreg_enable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp;

grp = twlreg_read(info, VREG_GRP);
grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
if (grp < 0)
return grp;

grp |= P1_GRP;
return twlreg_write(info, VREG_GRP, grp);
if (twl_class_is_4030())
grp |= P1_GRP_4030;
else
grp |= P1_GRP_6030;

return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
}

static int twlreg_disable(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int grp;

grp = twlreg_read(info, VREG_GRP);
grp = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_GRP);
if (grp < 0)
return grp;

grp &= ~P1_GRP;
return twlreg_write(info, VREG_GRP, grp);
if (twl_class_is_4030())
grp &= ~P1_GRP_4030;
else
grp &= ~P1_GRP_6030;

return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
}

static int twlreg_get_status(struct regulator_dev *rdev)
{
int state = twlreg_grp(rdev);

if (twl_class_is_6030())
return 0; /* FIXME return for 6030 regulator */

if (state < 0)
return state;
state &= 0x0f;
Expand All @@ -152,6 +183,9 @@ static int twlreg_set_mode(struct regulator_dev *rdev, unsigned mode)
unsigned message;
int status;

if (twl_class_is_6030())
return 0; /* FIXME return for 6030 regulator */

/* We can only set the mode through state machine commands... */
switch (mode) {
case REGULATOR_MODE_NORMAL:
Expand All @@ -168,7 +202,7 @@ static int twlreg_set_mode(struct regulator_dev *rdev, unsigned mode)
status = twlreg_grp(rdev);
if (status < 0)
return status;
if (!(status & (P3_GRP | P2_GRP | P1_GRP)))
if (!(status & (P3_GRP_4030 | P2_GRP_4030 | P1_GRP_4030)))
return -EACCES;

status = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
Expand Down Expand Up @@ -260,7 +294,29 @@ static const u16 VSIM_VSEL_table[] = {
static const u16 VDAC_VSEL_table[] = {
1200, 1300, 1800, 1800,
};

static const u16 VAUX1_6030_VSEL_table[] = {
1000, 1300, 1800, 2500,
2800, 2900, 3000, 3000,
};
static const u16 VAUX2_6030_VSEL_table[] = {
1200, 1800, 2500, 2750,
2800, 2800, 2800, 2800,
};
static const u16 VAUX3_6030_VSEL_table[] = {
1000, 1200, 1300, 1800,
2500, 2800, 3000, 3000,
};
static const u16 VMMC_VSEL_table[] = {
1200, 1800, 2800, 2900,
3000, 3000, 3000, 3000,
};
static const u16 VPP_VSEL_table[] = {
1800, 1900, 2000, 2100,
2200, 2300, 2400, 2500,
};
static const u16 VUSIM_VSEL_table[] = {
1200, 1800, 2500, 2900,
};

static int twlldo_list_voltage(struct regulator_dev *rdev, unsigned index)
{
Expand Down Expand Up @@ -288,7 +344,8 @@ twlldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)

/* use the first in-range value */
if (min_uV <= uV && uV <= max_uV)
return twlreg_write(info, VREG_DEDICATED, vsel);
return twlreg_write(info, TWL_MODULE_PM_RECEIVER,
VREG_VOLTAGE, vsel);
}

return -EDOM;
Expand All @@ -297,7 +354,8 @@ twlldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
static int twlldo_get_voltage(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = twlreg_read(info, VREG_DEDICATED);
int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
VREG_VOLTAGE);

if (vsel < 0)
return vsel;
Expand Down Expand Up @@ -360,6 +418,10 @@ static struct regulator_ops twlfixed_ops = {
TWL_ADJUSTABLE_LDO(label, offset, num, TWL4030)
#define TWL4030_FIXED_LDO(label, offset, mVolts, num) \
TWL_FIXED_LDO(label, offset, mVolts, num, TWL4030)
#define TWL6030_ADJUSTABLE_LDO(label, offset, num) \
TWL_ADJUSTABLE_LDO(label, offset, num, TWL6030)
#define TWL6030_FIXED_LDO(label, offset, mVolts, num) \
TWL_FIXED_LDO(label, offset, mVolts, num, TWL6030)

#define TWL_ADJUSTABLE_LDO(label, offset, num, family) { \
.base = offset, \
Expand Down Expand Up @@ -420,6 +482,18 @@ static struct twlreg_info twl_regs[] = {
TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
/* VUSBCP is managed *only* by the USB subchip */

/* 6030 REG with base as PMC Slave Misc : 0x0030 */
TWL6030_ADJUSTABLE_LDO(VAUX1_6030, 0x54, 1),
TWL6030_ADJUSTABLE_LDO(VAUX2_6030, 0x58, 2),
TWL6030_ADJUSTABLE_LDO(VAUX3_6030, 0x5c, 3),
TWL6030_ADJUSTABLE_LDO(VMMC, 0x68, 4),
TWL6030_ADJUSTABLE_LDO(VPP, 0x6c, 5),
TWL6030_ADJUSTABLE_LDO(VUSIM, 0x74, 7),
TWL6030_FIXED_LDO(VANA, 0x50, 2100, 15),
TWL6030_FIXED_LDO(VCXIO, 0x60, 1800, 16),
TWL6030_FIXED_LDO(VDAC, 0x64, 1800, 17),
TWL6030_FIXED_LDO(VUSB, 0x70, 3300, 18)
};

static int twlreg_probe(struct platform_device *pdev)
Expand Down
34 changes: 34 additions & 0 deletions include/linux/i2c/twl.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -427,6 +427,12 @@ int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
#define MSG_SINGULAR(devgrp, id, state) \
((devgrp) << 13 | 0 << 12 | (id) << 4 | (state))

#define MSG_BROADCAST_ALL(devgrp, state) \
((devgrp) << 5 | (state))

#define MSG_BROADCAST_REF MSG_BROADCAST_ALL
#define MSG_BROADCAST_PROV MSG_BROADCAST_ALL
#define MSG_BROADCAST__CLK_RST MSG_BROADCAST_ALL
/*----------------------------------------------------------------------*/

struct twl4030_clock_init_data {
Expand Down Expand Up @@ -602,6 +608,7 @@ int twl4030_sih_setup(int module);
* VIO is generally fixed.
*/

/* TWL4030 SMPS/LDO's */
/* EXTERNAL dc-to-dc buck converters */
#define TWL4030_REG_VDD1 0
#define TWL4030_REG_VDD2 1
Expand All @@ -628,4 +635,31 @@ int twl4030_sih_setup(int module);
#define TWL4030_REG_VUSB1V8 18
#define TWL4030_REG_VUSB3V1 19

/* TWL6030 SMPS/LDO's */
/* EXTERNAL dc-to-dc buck convertor contollable via SR */
#define TWL6030_REG_VDD1 30
#define TWL6030_REG_VDD2 31
#define TWL6030_REG_VDD3 32

/* Non SR compliant dc-to-dc buck convertors */
#define TWL6030_REG_VMEM 33
#define TWL6030_REG_V2V1 34
#define TWL6030_REG_V1V29 35
#define TWL6030_REG_V1V8 36

/* EXTERNAL LDOs */
#define TWL6030_REG_VAUX1_6030 37
#define TWL6030_REG_VAUX2_6030 38
#define TWL6030_REG_VAUX3_6030 39
#define TWL6030_REG_VMMC 40
#define TWL6030_REG_VPP 41
#define TWL6030_REG_VUSIM 42
#define TWL6030_REG_VANA 43
#define TWL6030_REG_VCXIO 44
#define TWL6030_REG_VDAC 45
#define TWL6030_REG_VUSB 46

/* INTERNAL LDOs */
#define TWL6030_REG_VRTC 47

#endif /* End of __TWL4030_H */

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