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regulator: Add support s5m8767 opmode operation
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S5M8767A has 4 operation mode for BUCK/LDOs.
This patch can handle opmode for s5m8767a.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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Sangbeom Kim authored and Mark Brown committed Apr 1, 2012
1 parent 62fe8cd commit 7e44bb8
Showing 1 changed file with 61 additions and 10 deletions.
71 changes: 61 additions & 10 deletions drivers/regulator/s5m8767.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ struct s5m8767_info {
struct s5m87xx_dev *iodev;
int num_regulators;
struct regulator_dev **rdev;
struct s5m_opmode_data *opmode;

int ramp_delay;
bool buck2_ramp;
Expand Down Expand Up @@ -141,9 +142,56 @@ static int s5m8767_list_voltage(struct regulator_dev *rdev,
return val;
}

static int s5m8767_get_register(struct regulator_dev *rdev, int *reg)
unsigned int s5m8767_opmode_reg[][4] = {
/* {OFF, ON, LOWPOWER, SUSPEND} */
/* LDO1 ... LDO28 */
{0x0, 0x3, 0x2, 0x1}, /* LDO1 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1}, /* LDO5 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO10 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO15 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO20 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO25 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO28 */

/* BUCK1 ... BUCK9 */
{0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
};

static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
int *enable_ctrl)
{
int reg_id = rdev_get_id(rdev);
unsigned int mode;
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);

switch (reg_id) {
case S5M8767_LDO1 ... S5M8767_LDO2:
Expand All @@ -168,17 +216,19 @@ static int s5m8767_get_register(struct regulator_dev *rdev, int *reg)
return -EINVAL;
}

mode = s5m8767->opmode[reg_id].mode;
*enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
return 0;
}

static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, pattern = 0xc0;
int mask = 0xc0, enable_ctrl;
u8 val;

ret = s5m8767_get_register(rdev, &reg);
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret == -EINVAL)
return 1;
else if (ret)
Expand All @@ -188,33 +238,33 @@ static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
if (ret)
return ret;

return (val & mask) == pattern;
return (val & mask) == enable_ctrl;
}

static int s5m8767_reg_enable(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, pattern = 0xc0;
int mask = 0xc0, enable_ctrl;

ret = s5m8767_get_register(rdev, &reg);
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret)
return ret;

return s5m_reg_update(s5m8767->iodev, reg, pattern, mask);
return s5m_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
}

static int s5m8767_reg_disable(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, pattern = 0xc0;
int mask = 0xc0, enable_ctrl;

ret = s5m8767_get_register(rdev, &reg);
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret)
return ret;

return s5m_reg_update(s5m8767->iodev, reg, ~pattern, mask);
return s5m_reg_update(s5m8767->iodev, reg, ~mask, mask);
}

static int s5m8767_get_voltage_register(struct regulator_dev *rdev, int *_reg)
Expand Down Expand Up @@ -586,6 +636,7 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev)
s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
s5m8767->opmode = pdata->opmode;

for (i = 0; i < 8; i++) {
if (s5m8767->buck2_gpiodvs) {
Expand Down

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