Messages in this thread Patch in this message | | | From | Rhyland Klein <> | Subject | [RFC v2 3/3] power: power_supply: add support for getting supplied-nodes from dt | Date | Thu, 21 Feb 2013 18:11:12 -0500 |
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With the addition of the device_nodes to use to link suppliers and supplicants, its useful to add logic to handle the creation of the list in a common place so as to be common for all drivers.
As of now, as long as the supply's device_node is supplied, the core will attempt to parse the list of supplies and store it in the power_supply structure. In this way, it shouldn't break existing drivers, but allow for transition cleanly.
Signed-off-by: Rhyland Klein <rklein@nvidia.com> --- v2: - Simplified and renamed the logic to parse dt for the charger list. - Tied the dt parsing directly to power_supply_register to make fewer changes required for converting existing chargers/supplies.
drivers/power/power_supply_core.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index a87c5b8..05e2031 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -86,6 +86,39 @@ void power_supply_changed(struct power_supply *psy) } EXPORT_SYMBOL_GPL(power_supply_changed); +#ifdef CONFIG_OF +#include <linux/of.h> + +int power_supply_register_supplicant(struct power_supply *psy) +{ + struct device_node *np; + int i = 0; + + if (!psy->supplies.node) + return -EINVAL; + + do { + struct power_supply_supplies *lst; + + np = of_parse_phandle(psy->supplies.node, "power-supply", i++); + if (!np) + continue; + + lst = devm_kzalloc(psy->dev->parent, sizeof(*lst), GFP_KERNEL); + if (!lst) { + dev_warn(psy->dev->parent, + "Failed to alloc mem for supplies list\n"); + return -ENOMEM; + } + + lst->node = np; + list_add(&(lst->list), &(psy->supplies.list)); + } while (np); + + return 0; +} +#endif + static int __power_supply_am_i_supplied(struct device *dev, void *data) { union power_supply_propval ret = {0,}; @@ -355,6 +388,8 @@ int power_supply_register(struct device *parent, struct power_supply *psy) #ifdef CONFIG_OF INIT_LIST_HEAD(&psy->supplies.list); + + power_supply_register_supplicant(psy); #endif INIT_WORK(&psy->changed_work, power_supply_changed_work); -- 1.7.9.5
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