mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-02 17:41:08 +00:00
24cdf1a9be
In Tegra186, SoC power domains are manipulated using IPC requests to the BPMP (Boot and Power Management Processor). This change implements a driver that does that. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2016, NVIDIA CORPORATION.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <misc.h>
|
|
#include <power-domain-uclass.h>
|
|
#include <asm/arch-tegra/bpmp_abi.h>
|
|
|
|
#define UPDATE BIT(0)
|
|
#define ON BIT(1)
|
|
|
|
static int tegra186_power_domain_request(struct power_domain *power_domain)
|
|
{
|
|
debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
|
|
power_domain, power_domain->dev, power_domain->id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra186_power_domain_free(struct power_domain *power_domain)
|
|
{
|
|
debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
|
|
power_domain, power_domain->dev, power_domain->id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra186_power_domain_common(struct power_domain *power_domain,
|
|
bool on)
|
|
{
|
|
struct mrq_pg_update_state_request req;
|
|
int on_state = on ? ON : 0;
|
|
int ret;
|
|
|
|
req.partition_id = power_domain->id;
|
|
req.logic_state = UPDATE | on_state;
|
|
req.sram_state = UPDATE | on_state;
|
|
/*
|
|
* Drivers manage their own clocks so they don't get out of sync, and
|
|
* since some power domains have many clocks, only a subset of which
|
|
* are actually needed depending on use-case.
|
|
*/
|
|
req.clock_state = UPDATE;
|
|
|
|
ret = misc_call(power_domain->dev->parent, MRQ_PG_UPDATE_STATE, &req,
|
|
sizeof(req), NULL, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra186_power_domain_on(struct power_domain *power_domain)
|
|
{
|
|
debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
|
|
power_domain, power_domain->dev, power_domain->id);
|
|
|
|
return tegra186_power_domain_common(power_domain, true);
|
|
}
|
|
|
|
static int tegra186_power_domain_off(struct power_domain *power_domain)
|
|
{
|
|
debug("%s(power_domain=%p) (dev=%p, id=%lu)\n", __func__,
|
|
power_domain, power_domain->dev, power_domain->id);
|
|
|
|
return tegra186_power_domain_common(power_domain, false);
|
|
}
|
|
|
|
struct power_domain_ops tegra186_power_domain_ops = {
|
|
.request = tegra186_power_domain_request,
|
|
.free = tegra186_power_domain_free,
|
|
.on = tegra186_power_domain_on,
|
|
.off = tegra186_power_domain_off,
|
|
};
|
|
|
|
static int tegra186_power_domain_probe(struct udevice *dev)
|
|
{
|
|
debug("%s(dev=%p)\n", __func__, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_DRIVER(tegra186_power_domain) = {
|
|
.name = "tegra186_power_domain",
|
|
.id = UCLASS_POWER_DOMAIN,
|
|
.probe = tegra186_power_domain_probe,
|
|
.ops = &tegra186_power_domain_ops,
|
|
};
|