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- // 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,
- };
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