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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>
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@ -32,7 +32,7 @@ static void of_get_regulation_constraints(struct device_node *np,
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struct regulator_state *suspend_state;
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struct device_node *suspend_np;
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unsigned int mode;
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int ret, i;
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int ret, i, len;
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u32 pval;
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constraints->name = of_get_property(np, "regulator-name", NULL);
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@ -136,6 +136,33 @@ static void of_get_regulation_constraints(struct device_node *np,
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}
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}
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len = of_property_count_elems_of_size(np, "regulator-allowed-modes",
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sizeof(u32));
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if (len > 0) {
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if (desc && desc->of_map_mode) {
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for (i = 0; i < len; i++) {
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ret = of_property_read_u32_index(np,
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"regulator-allowed-modes", i, &pval);
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if (ret) {
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pr_err("%s: couldn't read allowed modes index %d, ret=%d\n",
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np->name, i, ret);
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break;
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}
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mode = desc->of_map_mode(pval);
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if (mode == REGULATOR_MODE_INVALID)
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pr_err("%s: invalid regulator-allowed-modes element %u\n",
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np->name, pval);
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else
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constraints->valid_modes_mask |= mode;
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}
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if (constraints->valid_modes_mask)
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constraints->valid_ops_mask
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|= REGULATOR_CHANGE_MODE;
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} else {
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pr_warn("%s: mode mapping not defined\n", np->name);
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}
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}
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if (!of_property_read_u32(np, "regulator-system-load", &pval))
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constraints->system_load = pval;
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