Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-02 02:01:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'regulator/topic/mc13892' into regulator-next

Browse Source
This commit is contained in:
Mark Brown 2013-02-19 12:42:50 +00:00
commit c99f21c276
3 changed files with 102 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
drivers/regulator/mc13892-regulator.c
View File

@ -164,6 +164,14 @@ static const unsigned int mc13892_sw1[] = {
1350000, 1375000
};
/*
* Note: this table is used to derive SWxVSEL by index into
* the array. Offset the values by the index of 1100000uV
* to get the actual register value for that voltage selector
* if the HI bit is to be set as well.
*/
#define MC13892_SWxHI_SEL_OFFSET 20
static const unsigned int mc13892_sw[] = {
600000, 625000, 650000, 675000, 700000, 725000,
750000, 775000, 800000, 825000, 850000, 875000,
@ -239,7 +247,6 @@ static const unsigned int mc13892_pwgtdrv[] = {
};
static struct regulator_ops mc13892_gpo_regulator_ops;
/* sw regulators need special care due to the "hi bit" */
static struct regulator_ops mc13892_sw_regulator_ops;
@ -396,7 +403,7 @@ static int mc13892_sw_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
unsigned int val;
unsigned int val, selector;
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
@ -407,12 +414,28 @@ static int mc13892_sw_regulator_get_voltage_sel(struct regulator_dev *rdev)
if (ret)
return ret;
val = (val & mc13892_regulators[id].vsel_mask)
>> mc13892_regulators[id].vsel_shift;
/*
* Figure out if the HI bit is set inside the switcher mode register
* since this means the selector value we return is at a different
* offset into the selector table.
*
* According to the MC13892 documentation note 59 (Table 47) the SW1
* buck switcher does not support output range programming therefore
* the HI bit must always remain 0. So do not do anything strange if
* our register is MC13892_SWITCHERS0.
*/
dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
selector = val & mc13892_regulators[id].vsel_mask;
return val;
if ((mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) &&
(val & MC13892_SWITCHERS0_SWxHI)) {
selector += MC13892_SWxHI_SEL_OFFSET;
}
dev_dbg(rdev_get_dev(rdev), "%s id: %d val: 0x%08x selector: %d\n",
__func__, id, val, selector);
return selector;
}
static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev,
@ -425,18 +448,35 @@ static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev,
volt = rdev->desc->volt_table[selector];
mask = mc13892_regulators[id].vsel_mask;
reg_value = selector << mc13892_regulators[id].vsel_shift;
reg_value = selector;
if (volt > 1375000) {
mask |= MC13892_SWITCHERS0_SWxHI;
reg_value |= MC13892_SWITCHERS0_SWxHI;
} else if (volt < 1100000) {
mask |= MC13892_SWITCHERS0_SWxHI;
reg_value &= ~MC13892_SWITCHERS0_SWxHI;
/*
* Don't mess with the HI bit or support HI voltage offsets for SW1.
*
* Since the get_voltage_sel callback has given a fudged value for
* the selector offset, we need to back out that offset if HI is
* to be set so we write the correct value to the register.
*
* The HI bit addition and selector offset handling COULD be more
* complicated by shifting and masking off the voltage selector part
* of the register then logical OR it back in, but since the selector
* is at bits 4:0 there is very little point. This makes the whole
* thing more readable and we do far less work.
*/
if (mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) {
if (volt > 1375000) {
reg_value -= MC13892_SWxHI_SEL_OFFSET;
reg_value |= MC13892_SWITCHERS0_SWxHI;
mask |= MC13892_SWITCHERS0_SWxHI;
} else if (volt < 1100000) {
reg_value &= ~MC13892_SWITCHERS0_SWxHI;
mask |= MC13892_SWITCHERS0_SWxHI;
}
}
mc13xxx_lock(priv->mc13xxx);
ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].reg, mask,
ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].vsel_reg, mask,
reg_value);
mc13xxx_unlock(priv->mc13xxx);
@ -495,15 +535,18 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
struct mc13xxx_regulator_init_data *mc13xxx_data;
struct regulator_config config = { };
int i, ret;
int num_regulators = 0;
int num_regulators = 0, num_parsed;
u32 val;
num_regulators = mc13xxx_get_num_regulators_dt(pdev);
if (num_regulators <= 0 && pdata)
num_regulators = pdata->num_regulators;
if (num_regulators <= 0)
return -EINVAL;
num_parsed = num_regulators;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv) +
num_regulators * sizeof(priv->regulators[0]),
GFP_KERNEL);
@ -520,7 +563,7 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
if (ret)
goto err_unlock;
/* enable switch auto mode */
/* enable switch auto mode (on 2.0A silicon only) */
if ((val & 0x0000FFFF) == 0x45d0) {
ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS4,
MC13892_SWITCHERS4_SW1MODE_M |
@ -546,7 +589,39 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
= mc13892_vcam_get_mode;
mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators,
ARRAY_SIZE(mc13892_regulators));
ARRAY_SIZE(mc13892_regulators),
&num_parsed);
/*
* Perform a little sanity check on the regulator tree - if we found
* a number of regulators from mc13xxx_get_num_regulators_dt and
* then parsed a smaller number in mc13xxx_parse_regulators_dt then
* there is a regulator defined in the regulators node which has
* not matched any usable regulator in the driver. In this case,
* there is one missing and what will happen is the first regulator
* will get registered again.
*
* Fix this by basically making our number of registerable regulators
* equal to the number of regulators we parsed. We are allocating
* too much memory for priv, but this is unavoidable at this point.
*
* As an example of how this can happen, try making a typo in your
* regulators node (vviohi {} instead of viohi {}) so that the name
* does not match..
*
* The check will basically pass for platform data (non-DT) because
* mc13xxx_parse_regulators_dt for !CONFIG_OF will not touch num_parsed.
*
*/
if (num_parsed != num_regulators) {
dev_warn(&pdev->dev,
"parsed %d != regulators %d - check your device tree!\n",
num_parsed, num_regulators);
num_regulators = num_parsed;
priv->num_regulators = num_regulators;
}
for (i = 0; i < num_regulators; i++) {
struct regulator_init_data *init_data;
struct regulator_desc *desc;

10
drivers/regulator/mc13xxx-regulator-core.c
View File

@ -181,12 +181,14 @@ EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators)
int num_regulators, int *num_parsed)
{
struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
struct mc13xxx_regulator_init_data *data, *p;
struct device_node *parent, *child;
int i;
int i, parsed = 0;
*num_parsed = 0;
of_node_get(pdev->dev.parent->of_node);
parent = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
@ -203,16 +205,20 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
for (i = 0; i < num_regulators; i++) {
if (!of_node_cmp(child->name,
regulators[i].desc.name)) {
p->id = i;
p->init_data = of_get_regulator_init_data(
&pdev->dev, child);
p->node = child;
p++;
parsed++;
break;
}
}
}
*num_parsed = parsed;
return data;
}
EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);

4
drivers/regulator/mc13xxx.h
View File

@ -39,7 +39,7 @@ extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
extern int mc13xxx_get_num_regulators_dt(struct platform_device *pdev);
extern struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators);
int num_regulators, int *num_parsed);
#else
static inline int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
{
@ -48,7 +48,7 @@ static inline int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
static inline struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
struct platform_device *pdev, struct mc13xxx_regulator *regulators,
int num_regulators)
int num_regulators, int *num_parsed)
{
return NULL;
}