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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-21 GuEe-GUI first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "regulator.scmi"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
struct scmi_regulator
{
struct rt_regulator_node parent;
struct rt_regulator_param param;
struct rt_device dev;
struct rt_scmi_device *sdev;
rt_uint32_t domain_id;
};
#define raw_to_scmi_regulator(raw) rt_container_of(raw, struct scmi_regulator, parent)
static rt_err_t scmi_regulator_set_enable(struct scmi_regulator *sreg, rt_bool_t enable)
{
struct scmi_voltage_config_set_in in =
{
.domain_id = rt_cpu_to_le32(sreg->domain_id),
.config = rt_cpu_to_le32(enable ? SCMI_VOLTAGE_CONFIG_ON : SCMI_VOLTAGE_CONFIG_OFF),
};
struct scmi_voltage_config_set_out out;
struct rt_scmi_msg msg = RT_SCMI_MSG_IN_OUT(SCMI_VOLTAGE_DOMAIN_CONFIG_SET, &in, &out);
return rt_scmi_process_msg(sreg->sdev, &msg) ? : (out.status ? -RT_ERROR : RT_EOK);
}
static rt_err_t scmi_regulator_enable(struct rt_regulator_node *reg_np)
{
struct scmi_regulator *sreg = raw_to_scmi_regulator(reg_np);
return scmi_regulator_set_enable(sreg, RT_TRUE);
}
static rt_err_t scmi_regulator_disable(struct rt_regulator_node *reg_np)
{
struct scmi_regulator *sreg = raw_to_scmi_regulator(reg_np);
return scmi_regulator_set_enable(sreg, RT_FALSE);
}
static rt_bool_t scmi_regulator_is_enabled(struct rt_regulator_node *reg_np)
{
struct scmi_regulator *sreg = raw_to_scmi_regulator(reg_np);
struct scmi_voltage_config_get_in in =
{
.domain_id = rt_cpu_to_le32(sreg->domain_id),
};
struct scmi_voltage_config_get_out out;
struct rt_scmi_msg msg = RT_SCMI_MSG_IN_OUT(SCMI_VOLTAGE_DOMAIN_CONFIG_GET, &in, &out);
return rt_scmi_process_msg(sreg->sdev, &msg) ? RT_FALSE : (out.config == SCMI_VOLTAGE_CONFIG_ON);
}
static rt_err_t scmi_regulator_set_voltage(struct rt_regulator_node *reg_np,
int min_uvolt, int max_uvolt)
{
struct scmi_regulator *sreg = raw_to_scmi_regulator(reg_np);
struct scmi_voltage_level_set_in in =
{
.domain_id = rt_cpu_to_le32(sreg->domain_id),
.voltage_level = rt_cpu_to_le32((max_uvolt + min_uvolt) >> 1),
};
struct scmi_voltage_level_set_out out;
struct rt_scmi_msg msg = RT_SCMI_MSG_IN_OUT(SCMI_VOLTAGE_DOMAIN_LEVEL_SET, &in, &out);
return rt_scmi_process_msg(sreg->sdev, &msg);
}
static int scmi_regulator_get_voltage(struct rt_regulator_node *reg_np)
{
struct scmi_regulator *sreg = raw_to_scmi_regulator(reg_np);
struct scmi_voltage_level_get_in in =
{
.domain_id = rt_cpu_to_le32(sreg->domain_id),
};
struct scmi_voltage_level_get_out out;
struct rt_scmi_msg msg = RT_SCMI_MSG_IN_OUT(SCMI_VOLTAGE_DOMAIN_LEVEL_GET, &in, &out);
return rt_scmi_process_msg(sreg->sdev, &msg) ? : out.voltage_level;
}
static const struct rt_regulator_ops scmi_regulator_voltage_ops =
{
.enable = scmi_regulator_enable,
.disable = scmi_regulator_disable,
.is_enabled = scmi_regulator_is_enabled,
.set_voltage = scmi_regulator_set_voltage,
.get_voltage = scmi_regulator_get_voltage,
};
static rt_err_t scmi_regulator_probe(struct rt_scmi_device *sdev)
{
rt_err_t err;
rt_uint32_t dom_nr;
struct rt_regulator_node *rnp;
struct rt_ofw_node *np, *child_np;
struct scmi_regulator *sregs = RT_NULL, *sreg;
np = rt_ofw_get_child_by_tag(sdev->parent.ofw_node, "regulators");
if (!np)
{
err = -RT_EINVAL;
goto _fail;
}
dom_nr = rt_ofw_get_child_count(np);
if (!dom_nr)
{
err = -RT_EEMPTY;
goto _fail;
}
sregs = rt_calloc(dom_nr, sizeof(*sregs));
if (!sregs)
{
err = -RT_ENOMEM;
goto _fail;
}
sreg = &sregs[0];
rt_ofw_foreach_child_node(np, child_np)
{
if ((err = rt_ofw_prop_read_u32(child_np, "reg", &sreg->domain_id)))
{
goto _fail;
}
sreg->sdev = sdev;
rnp = &sreg->parent;
sreg->dev.ofw_node = child_np;
rt_ofw_prop_read_string(child_np, "regulator-name", &rnp->supply_name);
rnp->ops = &scmi_regulator_voltage_ops;
rnp->param = &sreg->param;
rnp->dev = &sreg->dev;
++sreg;
}
rt_ofw_node_put(np);
sreg = &sregs[0];
for (int i = 0; i < dom_nr; ++i, ++sreg)
{
if ((err = rt_regulator_register(&sreg->parent)))
{
while (i --> 0)
{
--sreg;
rt_regulator_unregister(&sreg->parent);
}
goto _fail;
}
}
return RT_EOK;
_fail:
rt_ofw_node_put(np);
if (sregs)
{
rt_free(sregs);
}
return err;
}
static const struct rt_scmi_device_id scmi_regulator_ids[] =
{
{ SCMI_PROTOCOL_ID_VOLTAGE, "regulator" },
{ /* sentinel */ },
};
static struct rt_scmi_driver scmi_regulator_driver =
{
.name = "scmi-regulator",
.ids = scmi_regulator_ids,
.probe = scmi_regulator_probe,
};
RT_SCMI_DRIVER_EXPORT(scmi_regulator_driver);
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