| // 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/global_data.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_on(struct power_domain *power_domain) |
| { |
| struct udevice *dev = power_domain->dev; |
| struct imx8m_power_domain_plat *pdata; |
| |
| pdata = dev_get_plat(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_plat *pdata; |
| pdata = dev_get_plat(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); |
| |
| /* Descend into 'pgc' subnode */ |
| if (!strstr(name, "power-domain")) { |
| offset = fdt_first_subnode(gd->fdt_blob, offset); |
| 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_of_to_plat(struct udevice *dev) |
| { |
| struct imx8m_power_domain_plat *pdata = dev_get_plat(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" }, |
| { .compatible = "fsl,imx8mm-gpc" }, |
| { .compatible = "fsl,imx8mn-gpc" }, |
| { } |
| }; |
| |
| struct power_domain_ops imx8m_power_domain_ops = { |
| .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, |
| .of_to_plat = imx8m_power_domain_of_to_plat, |
| .plat_auto = sizeof(struct imx8m_power_domain_plat), |
| .ops = &imx8m_power_domain_ops, |
| }; |