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regulator: twl4030: add support for external voltage get/set

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This is needed for SMPS regulators, which use the OMAP voltage
processor for voltage get/set functions instead of the normal I2C
channel. For this purpose, regulator_init_data->driver_data contents
are expanded, it is now a struct which contains function pointers
for the set/get voltage operations, a data pointer for these, and
the previously used features bitmask.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com> [for the MFD part]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Tero Kristo 2012-02-16 12:27:52 +02:00 committed by Mark Brown
parent a33b6e5a8f
commit 63bfff4e20
3 changed files with 56 additions and 6 deletions
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16
drivers/mfd/twl-core.c
View File

@ -619,6 +619,8 @@ add_regulator_linked(int num, struct regulator_init_data *pdata,
unsigned num_consumers, unsigned long features)
{
unsigned sub_chip_id;
struct twl_regulator_driver_data drv_data;
/* regulator framework demands init_data ... */
if (!pdata)
return NULL;
@ -628,7 +630,19 @@ add_regulator_linked(int num, struct regulator_init_data *pdata,
pdata->num_consumer_supplies = num_consumers;
}
pdata->driver_data = (void *)features;
if (pdata->driver_data) {
/* If we have existing drv_data, just add the flags */
struct twl_regulator_driver_data *tmp;
tmp = pdata->driver_data;
tmp->features |= features;
} else {
/* add new driver data struct, used only during init */
drv_data.features = features;
drv_data.set_voltage = NULL;
drv_data.get_voltage = NULL;
drv_data.data = NULL;
pdata->driver_data = &drv_data;
}
/* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;

39
drivers/regulator/twl-regulator.c
View File

@ -58,6 +58,16 @@ struct twlreg_info {
/* chip specific features */
unsigned long features;
/*
* optional override functions for voltage set/get
* these are currently only used for SMPS regulators
*/
int (*get_voltage)(void *data);
int (*set_voltage)(void *data, int target_uV);
/* data passed from board for external get/set voltage */
void *data;
};
@ -522,15 +532,25 @@ twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030,
vsel);
if (info->set_voltage) {
return info->set_voltage(info->data, min_uV);
} else {
twlreg_write(info, TWL_MODULE_PM_RECEIVER,
VREG_VOLTAGE_SMPS_4030, vsel);
}
return 0;
}
static int twl4030smps_get_voltage(struct regulator_dev *rdev)
{
struct twlreg_info *info = rdev_get_drvdata(rdev);
int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
int vsel;
if (info->get_voltage)
return info->get_voltage(info->data);
vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
VREG_VOLTAGE_SMPS_4030);
return vsel * 12500 + 600000;
@ -1060,6 +1080,7 @@ static int __devinit twlreg_probe(struct platform_device *pdev)
struct regulator_init_data *initdata;
struct regulation_constraints *c;
struct regulator_dev *rdev;
struct twl_regulator_driver_data *drvdata;
for (i = 0, info = NULL; i < ARRAY_SIZE(twl_regs); i++) {
if (twl_regs[i].desc.id != pdev->id)
@ -1074,8 +1095,16 @@ static int __devinit twlreg_probe(struct platform_device *pdev)
if (!initdata)
return -EINVAL;
/* copy the features into regulator data */
info->features = (unsigned long)initdata->driver_data;
drvdata = initdata->driver_data;
if (!drvdata)
return -EINVAL;
/* copy the driver data into regulator data */
info->features = drvdata->features;
info->data = drvdata->data;
info->set_voltage = drvdata->set_voltage;
info->get_voltage = drvdata->get_voltage;
/* Constrain board-specific capabilities according to what
* this driver and the chip itself can actually do.

7
include/linux/i2c/twl.h
View File

@ -749,6 +749,13 @@ struct twl4030_platform_data {
struct regulator_init_data *vio6025;
};
struct twl_regulator_driver_data {
int (*set_voltage)(void *data, int target_uV);
int (*get_voltage)(void *data);
void *data;
unsigned long features;
};
/*----------------------------------------------------------------------*/
int twl4030_sih_setup(int module);