diff options
Diffstat (limited to 'drivers/regulator/bd718x7-regulator.c')
| -rw-r--r-- | drivers/regulator/bd718x7-regulator.c | 54 |
1 files changed, 25 insertions, 29 deletions
diff --git a/drivers/regulator/bd718x7-regulator.c b/drivers/regulator/bd718x7-regulator.c index c3fb05dce40c..1b5997c8482e 100644 --- a/drivers/regulator/bd718x7-regulator.c +++ b/drivers/regulator/bd718x7-regulator.c @@ -2,6 +2,7 @@ // Copyright (C) 2018 ROHM Semiconductors // bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver +#include <linux/cleanup.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> @@ -133,9 +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); @@ -172,16 +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; @@ -696,9 +698,9 @@ static int buck_set_hw_dvs_levels(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *cfg) { - struct bd718xx_regulator_data *data; + const struct bd718xx_regulator_data *data; - data = container_of(desc, struct bd718xx_regulator_data, desc); + data = container_of_const(desc, struct bd718xx_regulator_data, desc); return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap); } @@ -1596,7 +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) @@ -1611,6 +1613,8 @@ static int setup_feedback_loop(struct device *dev, struct device_node *np, step /= r1; new[j].min = min; + new[j].min_sel = desc->linear_ranges[j].min_sel; + new[j].max_sel = desc->linear_ranges[j].max_sel; new[j].step = step; dev_dbg(dev, "%s: old range min %d, step %d\n", @@ -1635,18 +1639,17 @@ static int get_special_regulators(struct device *dev, unsigned int num_reg_data, int *info) { int ret; - struct device_node *np; - struct device_node *nproot = dev->of_node; int uv; *info = 0; - nproot = of_get_child_by_name(nproot, "regulators"); + struct device_node *nproot __free(device_node) = of_get_child_by_name(dev->of_node, + "regulators"); if (!nproot) { dev_err(dev, "failed to find regulators node\n"); return -ENODEV; } - for_each_child_of_node(nproot, np) { + for_each_child_of_node_scoped(nproot, np) { if (of_property_read_bool(np, "rohm,no-regulator-enable-control")) mark_hw_controlled(dev, np, reg_data, num_reg_data, info); @@ -1656,22 +1659,15 @@ static int get_special_regulators(struct device *dev, if (ret == -EINVAL) continue; else - goto err_out; + return ret; } ret = setup_feedback_loop(dev, np, reg_data, num_reg_data, uv); if (ret) - goto err_out; + return ret; } - of_node_put(nproot); return 0; - -err_out: - of_node_put(np); - of_node_put(nproot); - - return ret; } static int bd718xx_probe(struct platform_device *pdev) |