mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright 2017 NXP
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <malloc.h>
|
|
#include <power-domain-uclass.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/power-domain.h>
|
|
#include <asm/mach-imx/sys_proto.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/device.h>
|
|
#include <imx_sip.h>
|
|
#include <linux/arm-smccc.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static int imx8m_power_domain_request(struct power_domain *power_domain)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_free(struct power_domain *power_domain)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_on(struct power_domain *power_domain)
|
|
{
|
|
struct udevice *dev = power_domain->dev;
|
|
struct imx8m_power_domain_platdata *pdata;
|
|
|
|
pdata = dev_get_platdata(dev);
|
|
|
|
if (pdata->resource_id < 0)
|
|
return -EINVAL;
|
|
|
|
if (pdata->has_pd)
|
|
power_domain_on(&pdata->pd);
|
|
|
|
arm_smccc_smc(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN,
|
|
pdata->resource_id, 1, 0, 0, 0, 0, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_off(struct power_domain *power_domain)
|
|
{
|
|
struct udevice *dev = power_domain->dev;
|
|
struct imx8m_power_domain_platdata *pdata;
|
|
pdata = dev_get_platdata(dev);
|
|
|
|
if (pdata->resource_id < 0)
|
|
return -EINVAL;
|
|
|
|
arm_smccc_smc(IMX_SIP_GPC, IMX_SIP_GPC_PM_DOMAIN,
|
|
pdata->resource_id, 0, 0, 0, 0, 0, NULL);
|
|
|
|
if (pdata->has_pd)
|
|
power_domain_off(&pdata->pd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_of_xlate(struct power_domain *power_domain,
|
|
struct ofnode_phandle_args *args)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_bind(struct udevice *dev)
|
|
{
|
|
int offset;
|
|
const char *name;
|
|
int ret = 0;
|
|
|
|
offset = dev_of_offset(dev);
|
|
for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
|
|
offset = fdt_next_subnode(gd->fdt_blob, offset)) {
|
|
/* Bind the subnode to this driver */
|
|
name = fdt_get_name(gd->fdt_blob, offset, NULL);
|
|
|
|
ret = device_bind_with_driver_data(dev, dev->driver, name,
|
|
dev->driver_data,
|
|
offset_to_ofnode(offset),
|
|
NULL);
|
|
|
|
if (ret == -ENODEV)
|
|
printf("Driver '%s' refuses to bind\n",
|
|
dev->driver->name);
|
|
|
|
if (ret)
|
|
printf("Error binding driver '%s': %d\n",
|
|
dev->driver->name, ret);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_probe(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int imx8m_power_domain_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct imx8m_power_domain_platdata *pdata = dev_get_platdata(dev);
|
|
|
|
pdata->resource_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"reg", -1);
|
|
|
|
if (!power_domain_get(dev, &pdata->pd))
|
|
pdata->has_pd = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id imx8m_power_domain_ids[] = {
|
|
{ .compatible = "fsl,imx8mq-gpc" },
|
|
{ }
|
|
};
|
|
|
|
struct power_domain_ops imx8m_power_domain_ops = {
|
|
.request = imx8m_power_domain_request,
|
|
.rfree = imx8m_power_domain_free,
|
|
.on = imx8m_power_domain_on,
|
|
.off = imx8m_power_domain_off,
|
|
.of_xlate = imx8m_power_domain_of_xlate,
|
|
};
|
|
|
|
U_BOOT_DRIVER(imx8m_power_domain) = {
|
|
.name = "imx8m_power_domain",
|
|
.id = UCLASS_POWER_DOMAIN,
|
|
.of_match = imx8m_power_domain_ids,
|
|
.bind = imx8m_power_domain_bind,
|
|
.probe = imx8m_power_domain_probe,
|
|
.ofdata_to_platdata = imx8m_power_domain_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct imx8m_power_domain_platdata),
|
|
.ops = &imx8m_power_domain_ops,
|
|
};
|