power: supply: core: Add support for supplied-from device-property (58a36bb0) · Commits · 戴 / test

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>

drivers/power/supply/power_supply_core.c

+23 −1

Original line number	Diff line number	Diff line
		@@ -274,8 +274,30 @@ static int power_supply_check_supplies(struct power_supply *psy)
		return power_supply_populate_supplied_from(psy);
		}
		#else
		static inline int power_supply_check_supplies(struct power_supply *psy)
		static int power_supply_check_supplies(struct power_supply *psy)
		{
		int nval, ret;

		if (!psy->dev.parent)
		return 0;

		nval = device_property_read_string_array(psy->dev.parent,
		"supplied-from", NULL, 0);
		if (nval <= 0)
		return 0;

		psy->supplied_from = devm_kmalloc_array(&psy->dev, nval,
		sizeof(char *), GFP_KERNEL);
		if (!psy->supplied_from)
		return -ENOMEM;

		ret = device_property_read_string_array(psy->dev.parent,
		"supplied-from", (const char **)psy->supplied_from, nval);
		if (ret < 0)
		return ret;

		psy->num_supplies = nval;

		return 0;
		}
		#endif

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