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regulator: of: add support for allowed modes configuration 

Add support for configuring the machine constraints
valid_modes_mask element based on a list of allowed modes
specified via a device tree property.

Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
David Collins 2018-05-11 18:46:47 -07:00 committed by Mark Brown
parent d73e2842a3
commit 54557ad973
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GPG Key ID: 24D68B725D5487D0
1 changed files with 28 additions and 1 deletions
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29
drivers/regulator/of_regulator.c
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@ -32,7 +32,7 @@ static void of_get_regulation_constraints(struct device_node *np,
struct regulator_state *suspend_state;
struct device_node *suspend_np;
unsigned int mode;
int ret, i;
int ret, i, len;
u32 pval;
constraints->name = of_get_property(np, "regulator-name", NULL);
@ -136,6 +136,33 @@ static void of_get_regulation_constraints(struct device_node *np,
}
}
len = of_property_count_elems_of_size(np, "regulator-allowed-modes",
sizeof(u32));
if (len > 0) {
if (desc && desc->of_map_mode) {
for (i = 0; i < len; i++) {
ret = of_property_read_u32_index(np,
"regulator-allowed-modes", i, &pval);
if (ret) {
pr_err("%s: couldn't read allowed modes index %d, ret=%d\n",
np->name, i, ret);
break;
}
mode = desc->of_map_mode(pval);
if (mode == REGULATOR_MODE_INVALID)
pr_err("%s: invalid regulator-allowed-modes element %u\n",
np->name, pval);
else
constraints->valid_modes_mask |= mode;
}
if (constraints->valid_modes_mask)
constraints->valid_ops_mask
|= REGULATOR_CHANGE_MODE;
} else {
pr_warn("%s: mode mapping not defined\n", np->name);
}
}
if (!of_property_read_u32(np, "regulator-system-load", &pval))
constraints->system_load = pval;