diff options
Diffstat (limited to 'drivers/regulator/bd718x7-regulator.c')
| -rw-r--r-- | drivers/regulator/bd718x7-regulator.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/regulator/bd718x7-regulator.c b/drivers/regulator/bd718x7-regulator.c index 1bb048de3ecd..022d98f3c32a 100644 --- a/drivers/regulator/bd718x7-regulator.c +++ b/drivers/regulator/bd718x7-regulator.c @@ -134,9 +134,19 @@ static void voltage_change_done(struct regulator_dev *rdev, unsigned int sel, if (*mask) { /* - * Let's allow scheduling as we use I2C anyways. We just need to - * guarantee minimum of 1ms sleep - it shouldn't matter if we - * exceed it due to the scheduling. + * We had fault detection disabled for the duration of the + * voltage change. + * + * According to HW colleagues the maximum time it takes is + * 1000us. I assume that on systems with light load this + * might be less - and we could probably use DT to give + * system specific delay value if performance matters. + * + * Well, knowing we use I2C here and can add scheduling delays + * I don't think it is worth the hassle and I just add fixed + * 1ms sleep here (and allow scheduling). If this turns out to + * be a problem we can change it to delay and make the delay + * time configurable. */ msleep(1); @@ -173,16 +183,7 @@ static int voltage_change_prepare(struct regulator_dev *rdev, unsigned int sel, /* * If we increase LDO voltage when LDO is enabled we need to * disable the power-good detection until voltage has reached - * the new level. According to HW colleagues the maximum time - * it takes is 1000us. I assume that on systems with light load - * this might be less - and we could probably use DT to give - * system specific delay value if performance matters. - * - * Well, knowing we use I2C here and can add scheduling delays - * I don't think it is worth the hassle and I just add fixed - * 1ms sleep here (and allow scheduling). If this turns out to - * be a problem we can change it to delay and make the delay - * time configurable. + * the new level. */ if (new > now) { int tmp; @@ -1597,7 +1598,7 @@ static int setup_feedback_loop(struct device *dev, struct device_node *np, if (desc->n_linear_ranges && desc->linear_ranges) { struct linear_range *new; - new = devm_kzalloc(dev, desc->n_linear_ranges * + new = devm_kcalloc(dev, desc->n_linear_ranges, sizeof(struct linear_range), GFP_KERNEL); if (!new) |