dfad84aeab
Currently regulator_register_fixed() uses a constant name to register a fixed dummy regulator. This is sufficient in principle, since there is no reason to register multiple such regulators. The user can simply supply all consumers in one array and use it to initialise such a regulator. However, in some cases it can be convenient to register multiple such regulators. This is also a prerequisite for the upcoming patch, that will add a voltage parameter to this function. The original function is provided as a wrapper macro. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/fixed.h>
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struct fixed_regulator_data {
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struct fixed_voltage_config cfg;
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struct regulator_init_data init_data;
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struct platform_device pdev;
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};
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static void regulator_fixed_release(struct device *dev)
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{
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struct fixed_regulator_data *data = container_of(dev,
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struct fixed_regulator_data, pdev.dev);
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kfree(data->cfg.supply_name);
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kfree(data);
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}
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/**
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* regulator_register_fixed_name - register a no-op fixed regulator
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* @id: platform device id
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* @name: name to be used for the regulator
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* @supplies: consumers for this regulator
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* @num_supplies: number of consumers
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*/
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struct platform_device *regulator_register_always_on(int id, const char *name,
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struct regulator_consumer_supply *supplies, int num_supplies)
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{
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struct fixed_regulator_data *data;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return NULL;
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data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
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if (!data->cfg.supply_name) {
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kfree(data);
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return NULL;
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}
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data->cfg.microvolts = 0;
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data->cfg.gpio = -EINVAL;
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data->cfg.enabled_at_boot = 1;
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data->cfg.init_data = &data->init_data;
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data->init_data.constraints.always_on = 1;
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data->init_data.consumer_supplies = supplies;
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data->init_data.num_consumer_supplies = num_supplies;
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data->pdev.name = "reg-fixed-voltage";
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data->pdev.id = id;
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data->pdev.dev.platform_data = &data->cfg;
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data->pdev.dev.release = regulator_fixed_release;
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platform_device_register(&data->pdev);
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return &data->pdev;
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}
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