diff options
| -rw-r--r-- | arch/arm/include/asm/arch-imx8/power-domain.h | 15 | ||||
| -rw-r--r-- | drivers/power/domain/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/power/domain/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/domain/imx8-power-domain.c | 315 |
4 files changed, 338 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-imx8/power-domain.h b/arch/arm/include/asm/arch-imx8/power-domain.h new file mode 100644 index 0000000..1396008 --- /dev/null +++ b/arch/arm/include/asm/arch-imx8/power-domain.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2017 NXP + */ + +#ifndef _ASM_ARCH_IMX8_POWER_DOMAIN_H +#define _ASM_ARCH_IMX8_POWER_DOMAIN_H + +#include <asm/arch/sci/types.h> + +struct imx8_power_domain_platdata { + sc_rsrc_t resource_id; +}; + +#endif diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig index 2c34488..a08b428 100644 --- a/drivers/power/domain/Kconfig +++ b/drivers/power/domain/Kconfig @@ -16,6 +16,13 @@ config BCM6328_POWER_DOMAIN Enable support for manipulating BCM6345 power domains via MMIO mapped registers. +config IMX8_POWER_DOMAIN + bool "Enable i.MX8 power domain driver" + depends on ARCH_IMX8 + help + Enable support for manipulating NXP i.MX8 on-SoC power domains via IPC + requests to the SCU. + config MESON_GX_VPU_POWER_DOMAIN bool "Enable Amlogic Meson GX VPU power domain driver" depends on ARCH_MESON @@ -44,5 +51,4 @@ config TI_SCI_POWER_DOMAIN help Generic power domain implementation for TI devices implementing the TI SCI protocol. - endmenu diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile index 6bdaa17..23fb1ec 100644 --- a/drivers/power/domain/Makefile +++ b/drivers/power/domain/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_$(SPL_)POWER_DOMAIN) += power-domain-uclass.o obj-$(CONFIG_BCM6328_POWER_DOMAIN) += bcm6328-power-domain.o +obj-$(CONFIG_IMX8_POWER_DOMAIN) += imx8-power-domain.o obj-$(CONFIG_MESON_GX_VPU_POWER_DOMAIN) += meson-gx-pwrc-vpu.o obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain.o obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain-test.o diff --git a/drivers/power/domain/imx8-power-domain.c b/drivers/power/domain/imx8-power-domain.c new file mode 100644 index 0000000..d51dbaa --- /dev/null +++ b/drivers/power/domain/imx8-power-domain.c @@ -0,0 +1,315 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2017 NXP + */ + +#include <common.h> +#include <dm.h> +#include <power-domain-uclass.h> +#include <asm/io.h> +#include <asm/arch/power-domain.h> +#include <dm/device-internal.h> +#include <dm/device.h> +#include <asm/arch/sci/sci.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct imx8_power_domain_priv { + bool state_on; +}; + +static int imx8_power_domain_request(struct power_domain *power_domain) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + return 0; +} + +static int imx8_power_domain_free(struct power_domain *power_domain) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + return 0; +} + +static int imx8_power_domain_on(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct imx8_power_domain_platdata *pdata; + struct imx8_power_domain_priv *ppriv; + sc_err_t ret; + int err; + + struct power_domain parent_domain; + struct udevice *parent = dev_get_parent(dev); + + /* Need to power on parent node first */ + if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) { + parent_domain.dev = parent; + err = imx8_power_domain_on(&parent_domain); + if (err) + return err; + } + + pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev); + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev); + + debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name, + pdata->resource_id); + + /* Already powered on */ + if (ppriv->state_on) + return 0; + + if (pdata->resource_id != SC_R_LAST) { + ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id, + SC_PM_PW_MODE_ON); + if (ret) { + printf("Error: %s Power up failed! (error = %d)\n", + dev->name, ret); + return -EIO; + } + } + + ppriv->state_on = true; + debug("%s is powered on\n", dev->name); + + return 0; +} + +static int imx8_power_domain_off_node(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct udevice *child; + struct imx8_power_domain_priv *ppriv; + struct imx8_power_domain_priv *child_ppriv; + struct imx8_power_domain_platdata *pdata; + sc_err_t ret; + + ppriv = dev_get_priv(dev); + pdata = dev_get_platdata(dev); + + debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on); + + /* Already powered off */ + if (!ppriv->state_on) + return 0; + + /* Check if all subnodes are off */ + for (device_find_first_child(dev, &child); + child; + device_find_next_child(&child)) { + if (device_active(child)) { + child_ppriv = + (struct imx8_power_domain_priv *)dev_get_priv(child); + if (child_ppriv->state_on) + return -EPERM; + } + } + + if (pdata->resource_id != SC_R_LAST) { + if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) { + printf("%s not owned by curr partition\n", dev->name); + return 0; + } + ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id, + SC_PM_PW_MODE_OFF); + if (ret) { + printf("Error: %s Power off failed! (error = %d)\n", + dev->name, ret); + return -EIO; + } + } + + ppriv->state_on = false; + debug("%s is powered off\n", dev->name); + + return 0; +} + +static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct udevice *parent = dev_get_parent(dev); + struct udevice *child; + struct imx8_power_domain_priv *ppriv; + struct imx8_power_domain_priv *child_ppriv; + struct imx8_power_domain_platdata *pdata; + sc_err_t ret; + struct power_domain parent_pd; + + if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) { + pdata = + (struct imx8_power_domain_platdata *)dev_get_platdata(parent); + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent); + + debug("%s, %s, state_on %d\n", __func__, parent->name, + ppriv->state_on); + + /* Already powered off */ + if (!ppriv->state_on) + return 0; + + /* + * Check if all sibling nodes are off. If yes, + * power off parent + */ + for (device_find_first_child(parent, &child); child; + device_find_next_child(&child)) { + if (device_active(child)) { + child_ppriv = (struct imx8_power_domain_priv *) + dev_get_priv(child); + /* Find a power on sibling */ + if (child_ppriv->state_on) { + debug("sibling %s, state_on %d\n", + child->name, + child_ppriv->state_on); + return 0; + } + } + } + + /* power off parent */ + if (pdata->resource_id != SC_R_LAST) { + ret = sc_pm_set_resource_power_mode(-1, + pdata->resource_id, + SC_PM_PW_MODE_OFF); + if (ret) { + printf("%s Power off failed! (error = %d)\n", + parent->name, ret); + return -EIO; + } + } + + ppriv->state_on = false; + debug("%s is powered off\n", parent->name); + + parent_pd.dev = parent; + imx8_power_domain_off_parentnodes(&parent_pd); + } + + return 0; +} + +static int imx8_power_domain_off(struct power_domain *power_domain) +{ + int ret; + + debug("%s(power_domain=%p)\n", __func__, power_domain); + + /* Turn off the node */ + ret = imx8_power_domain_off_node(power_domain); + if (ret) { + debug("Can't power off the node of dev %s, ret = %d\n", + power_domain->dev->name, ret); + return ret; + } + + /* Turn off parent nodes, if sibling nodes are all off */ + ret = imx8_power_domain_off_parentnodes(power_domain); + if (ret) { + printf("Failed to power off parent nodes of dev %s, ret = %d\n", + power_domain->dev->name, ret); + return ret; + } + + return 0; +} + +static int imx8_power_domain_of_xlate(struct power_domain *power_domain, + struct ofnode_phandle_args *args) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + /* Do nothing to the xlate, since we don't have args used */ + + return 0; +} + +static int imx8_power_domain_bind(struct udevice *dev) +{ + int offset; + const char *name; + int ret = 0; + + debug("%s(dev=%p)\n", __func__, dev); + + 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 imx8_power_domain_probe(struct udevice *dev) +{ + struct imx8_power_domain_priv *ppriv; + + debug("%s(dev=%s)\n", __func__, dev->name); + + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev); + + /* Set default to power off */ + if (ppriv) + ppriv->state_on = false; + + return 0; +} + +static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev) +{ + int reg; + struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev); + + reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1); + if (reg == -1) { + debug("%s: Invalid resource id %d\n", __func__, reg); + return -EINVAL; + } + pdata->resource_id = (sc_rsrc_t)reg; + + debug("%s resource_id %d\n", __func__, pdata->resource_id); + + return 0; +} + +static const struct udevice_id imx8_power_domain_ids[] = { + { .compatible = "nxp,imx8-pd" }, + { } +}; + +struct power_domain_ops imx8_power_domain_ops = { + .request = imx8_power_domain_request, + .free = imx8_power_domain_free, + .on = imx8_power_domain_on, + .off = imx8_power_domain_off, + .of_xlate = imx8_power_domain_of_xlate, +}; + +U_BOOT_DRIVER(imx8_power_domain) = { + .name = "imx8_power_domain", + .id = UCLASS_POWER_DOMAIN, + .of_match = imx8_power_domain_ids, + .bind = imx8_power_domain_bind, + .probe = imx8_power_domain_probe, + .ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata), + .priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv), + .ops = &imx8_power_domain_ops, +}; |