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regulator: max8997: Remove n_bits from struct voltage_map_desc

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The n_bits is only used in max8997_get_voltage_proper_val to check the valid
range for variable i.

Current code already ensures min_vol never greater than desc->max,
which means the variable i always in the valid range:
0 .. (desc->max - desc->min)/desc->step.

Thus we can remove the checking (i >= (1 << desc->n_bits) and then remove
n_bits from struct voltage_map_desc.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-04-10 14:22:38 +08:00 committed by Mark Brown
parent 65896e7362
commit 0fa310ccab
1 changed files with 5 additions and 9 deletions
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14
drivers/regulator/max8997.c
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@ -68,29 +68,28 @@ struct voltage_map_desc {
int min;
int max;
int step;
unsigned int n_bits;
};
/* Voltage maps in mV */
static const struct voltage_map_desc ldo_voltage_map_desc = {
.min = 800, .max = 3950, .step = 50, .n_bits = 6,
.min = 800, .max = 3950, .step = 50,
}; /* LDO1 ~ 18, 21 all */
static const struct voltage_map_desc buck1245_voltage_map_desc = {
.min = 650, .max = 2225, .step = 25, .n_bits = 6,
.min = 650, .max = 2225, .step = 25,
}; /* Buck1, 2, 4, 5 */
static const struct voltage_map_desc buck37_voltage_map_desc = {
.min = 750, .max = 3900, .step = 50, .n_bits = 6,
.min = 750, .max = 3900, .step = 50,
}; /* Buck3, 7 */
/* current map in mA */
static const struct voltage_map_desc charger_current_map_desc = {
.min = 200, .max = 950, .step = 50, .n_bits = 4,
.min = 200, .max = 950, .step = 50,
};
static const struct voltage_map_desc topoff_current_map_desc = {
.min = 50, .max = 200, .step = 10, .n_bits = 4,
.min = 50, .max = 200, .step = 10,
};
static const struct voltage_map_desc *reg_voltage_map[] = {
@ -431,9 +430,6 @@ static inline int max8997_get_voltage_proper_val(
if (desc->min + desc->step * i > max_vol)
return -EINVAL;
if (i >= (1 << desc->n_bits))
return -EINVAL;
return i;
}