power: supply: core: Add support for supplied-from device-property
On devicetree using platforms the devicetree can provide info on which power-supplies supply another power-supply through phandles. This commit adds support for providing this info on non devicetree platforms through the platform code setting a supplied-from device-property on the power-supplies parent device. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
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@ -274,8 +274,30 @@ static int power_supply_check_supplies(struct power_supply *psy)
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return power_supply_populate_supplied_from(psy);
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}
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#else
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static inline int power_supply_check_supplies(struct power_supply *psy)
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static int power_supply_check_supplies(struct power_supply *psy)
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{
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int nval, ret;
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if (!psy->dev.parent)
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return 0;
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nval = device_property_read_string_array(psy->dev.parent,
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"supplied-from", NULL, 0);
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if (nval <= 0)
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return 0;
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psy->supplied_from = devm_kmalloc_array(&psy->dev, nval,
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sizeof(char *), GFP_KERNEL);
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if (!psy->supplied_from)
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return -ENOMEM;
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ret = device_property_read_string_array(psy->dev.parent,
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"supplied-from", (const char **)psy->supplied_from, nval);
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if (ret < 0)
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return ret;
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psy->num_supplies = nval;
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return 0;
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}
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#endif
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