mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 03:03:05 +00:00
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Texas Instruments System Control Interface (TI SCI) power domain driver
|
|
*
|
|
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Andreas Dannenberg <dannenberg@ti.com>
|
|
*
|
|
* Loosely based on Linux kernel ti_sci_pm_domains.c...
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <power-domain-uclass.h>
|
|
#include <dm/device_compat.h>
|
|
#include <linux/err.h>
|
|
#include <linux/soc/ti/ti_sci_protocol.h>
|
|
#include <dt-bindings/soc/ti,sci_pm_domain.h>
|
|
|
|
/**
|
|
* struct ti_sci_power_domain_data - pm domain controller information structure
|
|
* @sci: TI SCI handle used for communication with system controller
|
|
*/
|
|
struct ti_sci_power_domain_data {
|
|
const struct ti_sci_handle *sci;
|
|
};
|
|
|
|
static int ti_sci_power_domain_probe(struct udevice *dev)
|
|
{
|
|
struct ti_sci_power_domain_data *data = dev_get_priv(dev);
|
|
|
|
debug("%s(dev=%p)\n", __func__, dev);
|
|
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
/* Store handle for communication with the system controller */
|
|
data->sci = ti_sci_get_handle(dev);
|
|
if (IS_ERR(data->sci))
|
|
return PTR_ERR(data->sci);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sci_power_domain_request(struct power_domain *pd)
|
|
{
|
|
debug("%s(pd=%p)\n", __func__, pd);
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sci_power_domain_free(struct power_domain *pd)
|
|
{
|
|
debug("%s(pd=%p)\n", __func__, pd);
|
|
return 0;
|
|
}
|
|
|
|
static int ti_sci_power_domain_on(struct power_domain *pd)
|
|
{
|
|
struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
|
|
const struct ti_sci_handle *sci = data->sci;
|
|
const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
|
|
u8 flags = (uintptr_t)pd->priv;
|
|
int ret;
|
|
|
|
debug("%s(pd=%p)\n", __func__, pd);
|
|
|
|
if (flags & TI_SCI_PD_EXCLUSIVE)
|
|
ret = dops->get_device_exclusive(sci, pd->id);
|
|
else
|
|
ret = dops->get_device(sci, pd->id);
|
|
|
|
if (ret)
|
|
dev_err(pd->dev, "%s: get_device(%lu) failed (%d)\n",
|
|
__func__, pd->id, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ti_sci_power_domain_off(struct power_domain *pd)
|
|
{
|
|
struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
|
|
const struct ti_sci_handle *sci = data->sci;
|
|
const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
|
|
int ret;
|
|
|
|
debug("%s(pd=%p)\n", __func__, pd);
|
|
|
|
ret = dops->put_device(sci, pd->id);
|
|
if (ret)
|
|
dev_err(pd->dev, "%s: put_device(%lu) failed (%d)\n",
|
|
__func__, pd->id, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ti_sci_power_domain_of_xlate(struct power_domain *pd,
|
|
struct ofnode_phandle_args *args)
|
|
{
|
|
u8 flags;
|
|
|
|
debug("%s(power_domain=%p)\n", __func__, pd);
|
|
|
|
if (args->args_count < 1) {
|
|
debug("Invalid args_count: %d\n", args->args_count);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pd->id = args->args[0];
|
|
/* By default request for device exclusive */
|
|
flags = TI_SCI_PD_EXCLUSIVE;
|
|
if (args->args_count == 2)
|
|
flags = args->args[1] & TI_SCI_PD_EXCLUSIVE;
|
|
pd->priv = (void *)(uintptr_t)flags;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id ti_sci_power_domain_of_match[] = {
|
|
{ .compatible = "ti,sci-pm-domain" },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static struct power_domain_ops ti_sci_power_domain_ops = {
|
|
.request = ti_sci_power_domain_request,
|
|
.rfree = ti_sci_power_domain_free,
|
|
.on = ti_sci_power_domain_on,
|
|
.off = ti_sci_power_domain_off,
|
|
.of_xlate = ti_sci_power_domain_of_xlate,
|
|
};
|
|
|
|
U_BOOT_DRIVER(ti_sci_pm_domains) = {
|
|
.name = "ti-sci-pm-domains",
|
|
.id = UCLASS_POWER_DOMAIN,
|
|
.of_match = ti_sci_power_domain_of_match,
|
|
.probe = ti_sci_power_domain_probe,
|
|
.priv_auto_alloc_size = sizeof(struct ti_sci_power_domain_data),
|
|
.ops = &ti_sci_power_domain_ops,
|
|
};
|