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