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| author | Hans de Goede <hdegoede@redhat.com> | 2017-05-08 18:13:54 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2017-05-15 16:28:15 +0300 |
| commit | 58a36bb06891ee779074db6ef84e98347c634d38 (patch) | |
| tree | 35e9461323df91e0c95e500446bc38a1cd559bb8 /drivers/power | |
| parent | a463182031c122f91ccebc14f743654f12aa9cec (diff) | |
| download | linux-58a36bb06891ee779074db6ef84e98347c634d38.tar.xz | |
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>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/power_supply_core.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index 7ec7c7c202bd..0c09144193a6 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -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 |