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From 69dd0606a0d8680fe0a5e9b959f6662e582e1674 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Tue, 2 May 2017 13:43:34 +0200
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Subject: [PATCH 03/16] power: supply: core: Add support for supplied-from
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device-property
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On devicetree using platforms the devicetree can provide info on which
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power-supplies supply another power-supply through phandles.
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This commit adds support for providing this info on non devicetree
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platforms through the platform code setting a supplied-from
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device-property on the power-supplies parent device.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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drivers/power/supply/power_supply_core.c | 24 +++++++++++++++++++++++-
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1 file changed, 23 insertions(+), 1 deletion(-)
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diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
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index 7ec7c7c202bd..0c09144193a6 100644
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--- a/drivers/power/supply/power_supply_core.c
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+++ b/drivers/power/supply/power_supply_core.c
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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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+
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+ if (!psy->dev.parent)
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+ return 0;
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+
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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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+
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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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+
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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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+
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+ psy->num_supplies = nval;
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+
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return 0;
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}
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#endif
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--
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2.13.0
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