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regulator: TPS65910: Fix VDD1/2 voltage selector count 

Count of selector voltage is required for regulator_set_voltage
to work via set_voltage_sel. VDD1/2 currently have it as zero,
so regulator_set_voltage won't work for VDD1/2.
Update count (n_voltages) for VDD1/2.

Output Voltage = (step value * 12.5 mV + 562.5 mV) * gain

With above expr, number of voltages that can be selected is
step value count * gain count

constant for gain count will be called VDD1_2_NUM_VOLT_COARSE

existing constant for step value count is VDD1_2_NUM_VOLTS,
use VDD1_2_NUM_VOLT_FINE instead to make clear that step value
is not the only component in deciding selectable voltage count

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Afzal Mohammed 2011-11-08 18:54:10 +05:30 committed by Mark Brown
parent cfcfc9eca2
commit 780dc9ba4e
2 changed files with 10 additions and 7 deletions
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14
drivers/regulator/tps65910-regulator.c
View File

@ -664,10 +664,10 @@ static int tps65910_set_voltage_dcdc(struct regulator_dev *dev,
switch (id) {
case TPS65910_REG_VDD1:
dcdc_mult = (selector / VDD1_2_NUM_VOLTS) + 1;
dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
if (dcdc_mult == 1)
dcdc_mult--;
vsel = (selector % VDD1_2_NUM_VOLTS) + 3;
vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
tps65910_modify_bits(pmic, TPS65910_VDD1,
(dcdc_mult << VDD1_VGAIN_SEL_SHIFT),
@ -675,10 +675,10 @@ static int tps65910_set_voltage_dcdc(struct regulator_dev *dev,
tps65910_reg_write(pmic, TPS65910_VDD1_OP, vsel);
break;
case TPS65910_REG_VDD2:
dcdc_mult = (selector / VDD1_2_NUM_VOLTS) + 1;
dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
if (dcdc_mult == 1)
dcdc_mult--;
vsel = (selector % VDD1_2_NUM_VOLTS) + 3;
vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
tps65910_modify_bits(pmic, TPS65910_VDD2,
(dcdc_mult << VDD2_VGAIN_SEL_SHIFT),
@ -756,9 +756,9 @@ static int tps65910_list_voltage_dcdc(struct regulator_dev *dev,
switch (id) {
case TPS65910_REG_VDD1:
case TPS65910_REG_VDD2:
mult = (selector / VDD1_2_NUM_VOLTS) + 1;
mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
volt = VDD1_2_MIN_VOLT +
(selector % VDD1_2_NUM_VOLTS) * VDD1_2_OFFSET;
(selector % VDD1_2_NUM_VOLT_FINE) * VDD1_2_OFFSET;
break;
case TPS65911_REG_VDDCTRL:
volt = VDDCTRL_MIN_VOLT + (selector * VDDCTRL_OFFSET);
@ -947,6 +947,8 @@ static __devinit int tps65910_probe(struct platform_device *pdev)
if (i == TPS65910_REG_VDD1 || i == TPS65910_REG_VDD2) {
pmic->desc[i].ops = &tps65910_ops_dcdc;
pmic->desc[i].n_voltages = VDD1_2_NUM_VOLT_FINE *
VDD1_2_NUM_VOLT_COARSE;
} else if (i == TPS65910_REG_VDD3) {
if (tps65910_chip_id(tps65910) == TPS65910)
pmic->desc[i].ops = &tps65910_ops_vdd3;

3
include/linux/mfd/tps65910.h
View File

@ -243,7 +243,8 @@
/*Registers VDD1, VDD2 voltage values definitions */
#define VDD1_2_NUM_VOLTS 73
#define VDD1_2_NUM_VOLT_FINE 73
#define VDD1_2_NUM_VOLT_COARSE 3
#define VDD1_2_MIN_VOLT 6000
#define VDD1_2_OFFSET 125