pmdomain: Rename the genpd subsystem to pmdomain

It has been pointed out that naming a subsystem "genpd" isn't very
self-explanatory and the acronym itself that means Generic PM Domain, is
known only by a limited group of people.

In a way to improve the situation, let's rename the subsystem to pmdomain,
which ideally should indicate that this is about so called Power Domains or
"PM domains" as we often also use within the Linux Kernel terminology.

Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230912221127.487327-1-ulf.hansson@linaro.org

5 files changed, 1701 insertions, 0 deletions

diff --git a/drivers/pmdomain/bcm/Makefile b/drivers/pmdomain/bcm/Makefile
new file mode 100644
index 000000000000..6bfbe4e4db13
--- /dev/null
+++ b/drivers/pmdomain/bcm/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_BCM_PMB)			+= bcm-pmb.o
+obj-$(CONFIG_BCM2835_POWER)		+= bcm2835-power.o
+obj-$(CONFIG_BCM63XX_POWER)		+= bcm63xx-power.o
+obj-$(CONFIG_RASPBERRYPI_POWER)		+= raspberrypi-power.o
diff --git a/drivers/pmdomain/bcm/bcm-pmb.c b/drivers/pmdomain/bcm/bcm-pmb.c
new file mode 100644
index 000000000000..a72ba26ecf9d
--- /dev/null
+++ b/drivers/pmdomain/bcm/bcm-pmb.c
@@ -0,0 +1,363 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2013 Broadcom
+ * Copyright (C) 2020 Rafał Miłecki <rafal@milecki.pl>
+ */
+
+#include <dt-bindings/soc/bcm-pmb.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/reset/bcm63xx_pmb.h>
+
+#define BPCM_ID_REG					0x00
+#define BPCM_CAPABILITIES				0x04
+#define  BPCM_CAP_NUM_ZONES				0x000000ff
+#define  BPCM_CAP_SR_REG_BITS				0x0000ff00
+#define  BPCM_CAP_PLLTYPE				0x00030000
+#define  BPCM_CAP_UBUS					0x00080000
+#define BPCM_CONTROL					0x08
+#define BPCM_STATUS					0x0c
+#define BPCM_ROSC_CONTROL				0x10
+#define BPCM_ROSC_THRESH_H				0x14
+#define BPCM_ROSC_THRESHOLD_BCM6838			0x14
+#define BPCM_ROSC_THRESH_S				0x18
+#define BPCM_ROSC_COUNT_BCM6838				0x18
+#define BPCM_ROSC_COUNT					0x1c
+#define BPCM_PWD_CONTROL_BCM6838			0x1c
+#define BPCM_PWD_CONTROL				0x20
+#define BPCM_SR_CONTROL_BCM6838				0x20
+#define BPCM_PWD_ACCUM_CONTROL				0x24
+#define BPCM_SR_CONTROL					0x28
+#define BPCM_GLOBAL_CONTROL				0x2c
+#define BPCM_MISC_CONTROL				0x30
+#define BPCM_MISC_CONTROL2				0x34
+#define BPCM_SGPHY_CNTL					0x38
+#define BPCM_SGPHY_STATUS				0x3c
+#define BPCM_ZONE0					0x40
+#define  BPCM_ZONE_CONTROL				0x00
+#define   BPCM_ZONE_CONTROL_MANUAL_CLK_EN		0x00000001
+#define   BPCM_ZONE_CONTROL_MANUAL_RESET_CTL		0x00000002
+#define   BPCM_ZONE_CONTROL_FREQ_SCALE_USED		0x00000004	/* R/O */
+#define   BPCM_ZONE_CONTROL_DPG_CAPABLE			0x00000008	/* R/O */
+#define   BPCM_ZONE_CONTROL_MANUAL_MEM_PWR		0x00000030
+#define   BPCM_ZONE_CONTROL_MANUAL_ISO_CTL		0x00000040
+#define   BPCM_ZONE_CONTROL_MANUAL_CTL			0x00000080
+#define   BPCM_ZONE_CONTROL_DPG_CTL_EN			0x00000100
+#define   BPCM_ZONE_CONTROL_PWR_DN_REQ			0x00000200
+#define   BPCM_ZONE_CONTROL_PWR_UP_REQ			0x00000400
+#define   BPCM_ZONE_CONTROL_MEM_PWR_CTL_EN		0x00000800
+#define   BPCM_ZONE_CONTROL_BLK_RESET_ASSERT		0x00001000
+#define   BPCM_ZONE_CONTROL_MEM_STBY			0x00002000
+#define   BPCM_ZONE_CONTROL_RESERVED			0x0007c000
+#define   BPCM_ZONE_CONTROL_PWR_CNTL_STATE		0x00f80000
+#define   BPCM_ZONE_CONTROL_FREQ_SCALAR_DYN_SEL		0x01000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_PWR_OFF_STATE		0x02000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_PWR_ON_STATE		0x04000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_PWR_GOOD			0x08000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_DPG_PWR_STATE		0x10000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_MEM_PWR_STATE		0x20000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_ISO_STATE			0x40000000	/* R/O */
+#define   BPCM_ZONE_CONTROL_RESET_STATE			0x80000000	/* R/O */
+#define  BPCM_ZONE_CONFIG1				0x04
+#define  BPCM_ZONE_CONFIG2				0x08
+#define  BPCM_ZONE_FREQ_SCALAR_CONTROL			0x0c
+#define  BPCM_ZONE_SIZE					0x10
+
+struct bcm_pmb {
+	struct device *dev;
+	void __iomem *base;
+	spinlock_t lock;
+	bool little_endian;
+	struct genpd_onecell_data genpd_onecell_data;
+};
+
+struct bcm_pmb_pd_data {
+	const char * const name;
+	int id;
+	u8 bus;
+	u8 device;
+};
+
+struct bcm_pmb_pm_domain {
+	struct bcm_pmb *pmb;
+	const struct bcm_pmb_pd_data *data;
+	struct generic_pm_domain genpd;
+};
+
+static int bcm_pmb_bpcm_read(struct bcm_pmb *pmb, int bus, u8 device,
+			     int offset, u32 *val)
+{
+	void __iomem *base = pmb->base + bus * 0x20;
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&pmb->lock, flags);
+	err = bpcm_rd(base, device, offset, val);
+	spin_unlock_irqrestore(&pmb->lock, flags);
+
+	if (!err)
+		*val = pmb->little_endian ? le32_to_cpu(*val) : be32_to_cpu(*val);
+
+	return err;
+}
+
+static int bcm_pmb_bpcm_write(struct bcm_pmb *pmb, int bus, u8 device,
+			      int offset, u32 val)
+{
+	void __iomem *base = pmb->base + bus * 0x20;
+	unsigned long flags;
+	int err;
+
+	val = pmb->little_endian ? cpu_to_le32(val) : cpu_to_be32(val);
+
+	spin_lock_irqsave(&pmb->lock, flags);
+	err = bpcm_wr(base, device, offset, val);
+	spin_unlock_irqrestore(&pmb->lock, flags);
+
+	return err;
+}
+
+static int bcm_pmb_power_off_zone(struct bcm_pmb *pmb, int bus, u8 device,
+				  int zone)
+{
+	int offset;
+	u32 val;
+	int err;
+
+	offset = BPCM_ZONE0 + zone * BPCM_ZONE_SIZE + BPCM_ZONE_CONTROL;
+
+	err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
+	if (err)
+		return err;
+
+	val |= BPCM_ZONE_CONTROL_PWR_DN_REQ;
+	val &= ~BPCM_ZONE_CONTROL_PWR_UP_REQ;
+
+	err = bcm_pmb_bpcm_write(pmb, bus, device, offset, val);
+
+	return err;
+}
+
+static int bcm_pmb_power_on_zone(struct bcm_pmb *pmb, int bus, u8 device,
+				 int zone)
+{
+	int offset;
+	u32 val;
+	int err;
+
+	offset = BPCM_ZONE0 + zone * BPCM_ZONE_SIZE + BPCM_ZONE_CONTROL;
+
+	err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
+	if (err)
+		return err;
+
+	if (!(val & BPCM_ZONE_CONTROL_PWR_ON_STATE)) {
+		val &= ~BPCM_ZONE_CONTROL_PWR_DN_REQ;
+		val |= BPCM_ZONE_CONTROL_DPG_CTL_EN;
+		val |= BPCM_ZONE_CONTROL_PWR_UP_REQ;
+		val |= BPCM_ZONE_CONTROL_MEM_PWR_CTL_EN;
+		val |= BPCM_ZONE_CONTROL_BLK_RESET_ASSERT;
+
+		err = bcm_pmb_bpcm_write(pmb, bus, device, offset, val);
+	}
+
+	return err;
+}
+
+static int bcm_pmb_power_off_device(struct bcm_pmb *pmb, int bus, u8 device)
+{
+	int offset;
+	u32 val;
+	int err;
+
+	/* Entire device can be powered off by powering off the 0th zone */
+	offset = BPCM_ZONE0 + BPCM_ZONE_CONTROL;
+
+	err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
+	if (err)
+		return err;
+
+	if (!(val & BPCM_ZONE_CONTROL_PWR_OFF_STATE)) {
+		val = BPCM_ZONE_CONTROL_PWR_DN_REQ;
+
+		err = bcm_pmb_bpcm_write(pmb, bus, device, offset, val);
+	}
+
+	return err;
+}
+
+static int bcm_pmb_power_on_device(struct bcm_pmb *pmb, int bus, u8 device)
+{
+	u32 val;
+	int err;
+	int i;
+
+	err = bcm_pmb_bpcm_read(pmb, bus, device, BPCM_CAPABILITIES, &val);
+	if (err)
+		return err;
+
+	for (i = 0; i < (val & BPCM_CAP_NUM_ZONES); i++) {
+		err = bcm_pmb_power_on_zone(pmb, bus, device, i);
+		if (err)
+			return err;
+	}
+
+	return err;
+}
+
+static int bcm_pmb_power_on_sata(struct bcm_pmb *pmb, int bus, u8 device)
+{
+	int err;
+
+	err = bcm_pmb_power_on_zone(pmb, bus, device, 0);
+	if (err)
+		return err;
+
+	/* Does not apply to the BCM963158 */
+	err = bcm_pmb_bpcm_write(pmb, bus, device, BPCM_MISC_CONTROL, 0);
+	if (err)
+		return err;
+
+	err = bcm_pmb_bpcm_write(pmb, bus, device, BPCM_SR_CONTROL, 0xffffffff);
+	if (err)
+		return err;
+
+	err = bcm_pmb_bpcm_write(pmb, bus, device, BPCM_SR_CONTROL, 0);
+
+	return err;
+}
+
+static int bcm_pmb_power_on(struct generic_pm_domain *genpd)
+{
+	struct bcm_pmb_pm_domain *pd = container_of(genpd, struct bcm_pmb_pm_domain, genpd);
+	const struct bcm_pmb_pd_data *data = pd->data;
+	struct bcm_pmb *pmb = pd->pmb;
+
+	switch (data->id) {
+	case BCM_PMB_PCIE0:
+	case BCM_PMB_PCIE1:
+	case BCM_PMB_PCIE2:
+		return bcm_pmb_power_on_zone(pmb, data->bus, data->device, 0);
+	case BCM_PMB_HOST_USB:
+		return bcm_pmb_power_on_device(pmb, data->bus, data->device);
+	case BCM_PMB_SATA:
+		return bcm_pmb_power_on_sata(pmb, data->bus, data->device);
+	default:
+		dev_err(pmb->dev, "unsupported device id: %d\n", data->id);
+		return -EINVAL;
+	}
+}
+
+static int bcm_pmb_power_off(struct generic_pm_domain *genpd)
+{
+	struct bcm_pmb_pm_domain *pd = container_of(genpd, struct bcm_pmb_pm_domain, genpd);
+	const struct bcm_pmb_pd_data *data = pd->data;
+	struct bcm_pmb *pmb = pd->pmb;
+
+	switch (data->id) {
+	case BCM_PMB_PCIE0:
+	case BCM_PMB_PCIE1:
+	case BCM_PMB_PCIE2:
+		return bcm_pmb_power_off_zone(pmb, data->bus, data->device, 0);
+	case BCM_PMB_HOST_USB:
+		return bcm_pmb_power_off_device(pmb, data->bus, data->device);
+	default:
+		dev_err(pmb->dev, "unsupported device id: %d\n", data->id);
+		return -EINVAL;
+	}
+}
+
+static int bcm_pmb_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct bcm_pmb_pd_data *table;
+	const struct bcm_pmb_pd_data *e;
+	struct bcm_pmb *pmb;
+	int max_id;
+	int err;
+
+	pmb = devm_kzalloc(dev, sizeof(*pmb), GFP_KERNEL);
+	if (!pmb)
+		return -ENOMEM;
+
+	pmb->dev = dev;
+
+	pmb->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pmb->base))
+		return PTR_ERR(pmb->base);
+
+	spin_lock_init(&pmb->lock);
+
+	pmb->little_endian = !of_device_is_big_endian(dev->of_node);
+
+	table = of_device_get_match_data(dev);
+	if (!table)
+		return -EINVAL;
+
+	max_id = 0;
+	for (e = table; e->name; e++)
+		max_id = max(max_id, e->id);
+
+	pmb->genpd_onecell_data.num_domains = max_id + 1;
+	pmb->genpd_onecell_data.domains =
+		devm_kcalloc(dev, pmb->genpd_onecell_data.num_domains,
+			     sizeof(struct generic_pm_domain *), GFP_KERNEL);
+	if (!pmb->genpd_onecell_data.domains)
+		return -ENOMEM;
+
+	for (e = table; e->name; e++) {
+		struct bcm_pmb_pm_domain *pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+
+		if (!pd)
+			return -ENOMEM;
+
+		pd->pmb = pmb;
+		pd->data = e;
+		pd->genpd.name = e->name;
+		pd->genpd.power_on = bcm_pmb_power_on;
+		pd->genpd.power_off = bcm_pmb_power_off;
+
+		pm_genpd_init(&pd->genpd, NULL, true);
+		pmb->genpd_onecell_data.domains[e->id] = &pd->genpd;
+	}
+
+	err = of_genpd_add_provider_onecell(dev->of_node, &pmb->genpd_onecell_data);
+	if (err) {
+		dev_err(dev, "failed to add genpd provider: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct bcm_pmb_pd_data bcm_pmb_bcm4908_data[] = {
+	{ .name = "pcie2", .id = BCM_PMB_PCIE2, .bus = 0, .device = 2, },
+	{ .name = "pcie0", .id = BCM_PMB_PCIE0, .bus = 1, .device = 14, },
+	{ .name = "pcie1", .id = BCM_PMB_PCIE1, .bus = 1, .device = 15, },
+	{ .name = "usb", .id = BCM_PMB_HOST_USB, .bus = 1, .device = 17, },
+	{ },
+};
+
+static const struct bcm_pmb_pd_data bcm_pmb_bcm63138_data[] = {
+	{ .name = "sata", .id = BCM_PMB_SATA, .bus = 0, .device = 3, },
+	{ },
+};
+
+static const struct of_device_id bcm_pmb_of_match[] = {
+	{ .compatible = "brcm,bcm4908-pmb", .data = &bcm_pmb_bcm4908_data, },
+	{ .compatible = "brcm,bcm63138-pmb", .data = &bcm_pmb_bcm63138_data, },
+	{ },
+};
+
+static struct platform_driver bcm_pmb_driver = {
+	.driver = {
+		.name = "bcm-pmb",
+		.of_match_table = bcm_pmb_of_match,
+	},
+	.probe  = bcm_pmb_probe,
+};
+
+builtin_platform_driver(bcm_pmb_driver);
diff --git a/drivers/pmdomain/bcm/bcm2835-power.c b/drivers/pmdomain/bcm/bcm2835-power.c
new file mode 100644
index 000000000000..1a179d4e011c
--- /dev/null
+++ b/drivers/pmdomain/bcm/bcm2835-power.c
@@ -0,0 +1,713 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Power domain driver for Broadcom BCM2835
+ *
+ * Copyright (C) 2018 Broadcom
+ */
+
+#include <dt-bindings/soc/bcm2835-pm.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/mfd/bcm2835-pm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/reset-controller.h>
+#include <linux/types.h>
+
+#define PM_GNRIC                        0x00
+#define PM_AUDIO                        0x04
+#define PM_STATUS                       0x18
+#define PM_RSTC				0x1c
+#define PM_RSTS				0x20
+#define PM_WDOG				0x24
+#define PM_PADS0			0x28
+#define PM_PADS2			0x2c
+#define PM_PADS3			0x30
+#define PM_PADS4			0x34
+#define PM_PADS5			0x38
+#define PM_PADS6			0x3c
+#define PM_CAM0				0x44
+#define PM_CAM0_LDOHPEN			BIT(2)
+#define PM_CAM0_LDOLPEN			BIT(1)
+#define PM_CAM0_CTRLEN			BIT(0)
+
+#define PM_CAM1				0x48
+#define PM_CAM1_LDOHPEN			BIT(2)
+#define PM_CAM1_LDOLPEN			BIT(1)
+#define PM_CAM1_CTRLEN			BIT(0)
+
+#define PM_CCP2TX			0x4c
+#define PM_CCP2TX_LDOEN			BIT(1)
+#define PM_CCP2TX_CTRLEN		BIT(0)
+
+#define PM_DSI0				0x50
+#define PM_DSI0_LDOHPEN			BIT(2)
+#define PM_DSI0_LDOLPEN			BIT(1)
+#define PM_DSI0_CTRLEN			BIT(0)
+
+#define PM_DSI1				0x54
+#define PM_DSI1_LDOHPEN			BIT(2)
+#define PM_DSI1_LDOLPEN			BIT(1)
+#define PM_DSI1_CTRLEN			BIT(0)
+
+#define PM_HDMI				0x58
+#define PM_HDMI_RSTDR			BIT(19)
+#define PM_HDMI_LDOPD			BIT(1)
+#define PM_HDMI_CTRLEN			BIT(0)
+
+#define PM_USB				0x5c
+/* The power gates must be enabled with this bit before enabling the LDO in the
+ * USB block.
+ */
+#define PM_USB_CTRLEN			BIT(0)
+
+#define PM_PXLDO			0x60
+#define PM_PXBG				0x64
+#define PM_DFT				0x68
+#define PM_SMPS				0x6c
+#define PM_XOSC				0x70
+#define PM_SPAREW			0x74
+#define PM_SPARER			0x78
+#define PM_AVS_RSTDR			0x7c
+#define PM_AVS_STAT			0x80
+#define PM_AVS_EVENT			0x84
+#define PM_AVS_INTEN			0x88
+#define PM_DUMMY			0xfc
+
+#define PM_IMAGE			0x108
+#define PM_GRAFX			0x10c
+#define PM_PROC				0x110
+#define PM_ENAB				BIT(12)
+#define PM_ISPRSTN			BIT(8)
+#define PM_H264RSTN			BIT(7)
+#define PM_PERIRSTN			BIT(6)
+#define PM_V3DRSTN			BIT(6)
+#define PM_ISFUNC			BIT(5)
+#define PM_MRDONE			BIT(4)
+#define PM_MEMREP			BIT(3)
+#define PM_ISPOW			BIT(2)
+#define PM_POWOK			BIT(1)
+#define PM_POWUP			BIT(0)
+#define PM_INRUSH_SHIFT			13
+#define PM_INRUSH_3_5_MA		0
+#define PM_INRUSH_5_MA			1
+#define PM_INRUSH_10_MA			2
+#define PM_INRUSH_20_MA			3
+#define PM_INRUSH_MASK			(3 << PM_INRUSH_SHIFT)
+
+#define PM_PASSWORD			0x5a000000
+
+#define PM_WDOG_TIME_SET		0x000fffff
+#define PM_RSTC_WRCFG_CLR		0xffffffcf
+#define PM_RSTS_HADWRH_SET		0x00000040
+#define PM_RSTC_WRCFG_SET		0x00000030
+#define PM_RSTC_WRCFG_FULL_RESET	0x00000020
+#define PM_RSTC_RESET			0x00000102
+
+#define PM_READ(reg) readl(power->base + (reg))
+#define PM_WRITE(reg, val) writel(PM_PASSWORD | (val), power->base + (reg))
+
+#define ASB_BRDG_VERSION                0x00
+#define ASB_CPR_CTRL                    0x04
+
+#define ASB_V3D_S_CTRL			0x08
+#define ASB_V3D_M_CTRL			0x0c
+#define ASB_ISP_S_CTRL			0x10
+#define ASB_ISP_M_CTRL			0x14
+#define ASB_H264_S_CTRL			0x18
+#define ASB_H264_M_CTRL			0x1c
+
+#define ASB_REQ_STOP                    BIT(0)
+#define ASB_ACK                         BIT(1)
+#define ASB_EMPTY                       BIT(2)
+#define ASB_FULL                        BIT(3)
+
+#define ASB_AXI_BRDG_ID			0x20
+
+#define BCM2835_BRDG_ID			0x62726467
+
+struct bcm2835_power_domain {
+	struct generic_pm_domain base;
+	struct bcm2835_power *power;
+	u32 domain;
+	struct clk *clk;
+};
+
+struct bcm2835_power {
+	struct device		*dev;
+	/* PM registers. */
+	void __iomem		*base;
+	/* AXI Async bridge registers. */
+	void __iomem		*asb;
+	/* RPiVid bridge registers. */
+	void __iomem		*rpivid_asb;
+
+	struct genpd_onecell_data pd_xlate;
+	struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT];
+	struct reset_controller_dev reset;
+};
+
+static int bcm2835_asb_control(struct bcm2835_power *power, u32 reg, bool enable)
+{
+	void __iomem *base = power->asb;
+	u64 start;
+	u32 val;
+
+	switch (reg) {
+	case 0:
+		return 0;
+	case ASB_V3D_S_CTRL:
+	case ASB_V3D_M_CTRL:
+		if (power->rpivid_asb)
+			base = power->rpivid_asb;
+		break;
+	}
+
+	start = ktime_get_ns();
+
+	/* Enable the module's async AXI bridges. */
+	if (enable) {
+		val = readl(base + reg) & ~ASB_REQ_STOP;
+	} else {
+		val = readl(base + reg) | ASB_REQ_STOP;
+	}
+	writel(PM_PASSWORD | val, base + reg);
+
+	while (readl(base + reg) & ASB_ACK) {
+		cpu_relax();
+		if (ktime_get_ns() - start >= 1000)
+			return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
+{
+	return bcm2835_asb_control(power, reg, true);
+}
+
+static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
+{
+	return bcm2835_asb_control(power, reg, false);
+}
+
+static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg)
+{
+	struct bcm2835_power *power = pd->power;
+
+	/* We don't run this on BCM2711 */
+	if (power->rpivid_asb)
+		return 0;
+
+	/* Enable functional isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC);
+
+	/* Enable electrical isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW);
+
+	/* Open the power switches. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_POWUP);
+
+	return 0;
+}
+
+static int bcm2835_power_power_on(struct bcm2835_power_domain *pd, u32 pm_reg)
+{
+	struct bcm2835_power *power = pd->power;
+	struct device *dev = power->dev;
+	u64 start;
+	int ret;
+	int inrush;
+	bool powok;
+
+	/* We don't run this on BCM2711 */
+	if (power->rpivid_asb)
+		return 0;
+
+	/* If it was already powered on by the fw, leave it that way. */
+	if (PM_READ(pm_reg) & PM_POWUP)
+		return 0;
+
+	/* Enable power.  Allowing too much current at once may result
+	 * in POWOK never getting set, so start low and ramp it up as
+	 * necessary to succeed.
+	 */
+	powok = false;
+	for (inrush = PM_INRUSH_3_5_MA; inrush <= PM_INRUSH_20_MA; inrush++) {
+		PM_WRITE(pm_reg,
+			 (PM_READ(pm_reg) & ~PM_INRUSH_MASK) |
+			 (inrush << PM_INRUSH_SHIFT) |
+			 PM_POWUP);
+
+		start = ktime_get_ns();
+		while (!(powok = !!(PM_READ(pm_reg) & PM_POWOK))) {
+			cpu_relax();
+			if (ktime_get_ns() - start >= 3000)
+				break;
+		}
+	}
+	if (!powok) {
+		dev_err(dev, "Timeout waiting for %s power OK\n",
+			pd->base.name);
+		ret = -ETIMEDOUT;
+		goto err_disable_powup;
+	}
+
+	/* Disable electrical isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISPOW);
+
+	/* Repair memory */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_MEMREP);
+	start = ktime_get_ns();
+	while (!(PM_READ(pm_reg) & PM_MRDONE)) {
+		cpu_relax();
+		if (ktime_get_ns() - start >= 1000) {
+			dev_err(dev, "Timeout waiting for %s memory repair\n",
+				pd->base.name);
+			ret = -ETIMEDOUT;
+			goto err_disable_ispow;
+		}
+	}
+
+	/* Disable functional isolation */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | PM_ISFUNC);
+
+	return 0;
+
+err_disable_ispow:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISPOW);
+err_disable_powup:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~(PM_POWUP | PM_INRUSH_MASK));
+	return ret;
+}
+
+static int bcm2835_asb_power_on(struct bcm2835_power_domain *pd,
+				u32 pm_reg,
+				u32 asb_m_reg,
+				u32 asb_s_reg,
+				u32 reset_flags)
+{
+	struct bcm2835_power *power = pd->power;
+	int ret;
+
+	ret = clk_prepare_enable(pd->clk);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable clock for %s\n",
+			pd->base.name);
+		return ret;
+	}
+
+	/* Wait 32 clocks for reset to propagate, 1 us will be enough */
+	udelay(1);
+
+	clk_disable_unprepare(pd->clk);
+
+	/* Deassert the resets. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) | reset_flags);
+
+	ret = clk_prepare_enable(pd->clk);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable clock for %s\n",
+			pd->base.name);
+		goto err_enable_resets;
+	}
+
+	ret = bcm2835_asb_enable(power, asb_m_reg);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable ASB master for %s\n",
+			pd->base.name);
+		goto err_disable_clk;
+	}
+	ret = bcm2835_asb_enable(power, asb_s_reg);
+	if (ret) {
+		dev_err(power->dev, "Failed to enable ASB slave for %s\n",
+			pd->base.name);
+		goto err_disable_asb_master;
+	}
+
+	return 0;
+
+err_disable_asb_master:
+	bcm2835_asb_disable(power, asb_m_reg);
+err_disable_clk:
+	clk_disable_unprepare(pd->clk);
+err_enable_resets:
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags);
+	return ret;
+}
+
+static int bcm2835_asb_power_off(struct bcm2835_power_domain *pd,
+				 u32 pm_reg,
+				 u32 asb_m_reg,
+				 u32 asb_s_reg,
+				 u32 reset_flags)
+{
+	struct bcm2835_power *power = pd->power;
+	int ret;
+
+	ret = bcm2835_asb_disable(power, asb_s_reg);
+	if (ret) {
+		dev_warn(power->dev, "Failed to disable ASB slave for %s\n",
+			 pd->base.name);
+		return ret;
+	}
+	ret = bcm2835_asb_disable(power, asb_m_reg);
+	if (ret) {
+		dev_warn(power->dev, "Failed to disable ASB master for %s\n",
+			 pd->base.name);
+		bcm2835_asb_enable(power, asb_s_reg);
+		return ret;
+	}
+
+	clk_disable_unprepare(pd->clk);
+
+	/* Assert the resets. */
+	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~reset_flags);
+
+	return 0;
+}
+
+static int bcm2835_power_pd_power_on(struct generic_pm_domain *domain)
+{
+	struct bcm2835_power_domain *pd =
+		container_of(domain, struct bcm2835_power_domain, base);
+	struct bcm2835_power *power = pd->power;
+
+	switch (pd->domain) {
+	case BCM2835_POWER_DOMAIN_GRAFX:
+		return bcm2835_power_power_on(pd, PM_GRAFX);
+
+	case BCM2835_POWER_DOMAIN_GRAFX_V3D:
+		return bcm2835_asb_power_on(pd, PM_GRAFX,
+					    ASB_V3D_M_CTRL, ASB_V3D_S_CTRL,
+					    PM_V3DRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE:
+		return bcm2835_power_power_on(pd, PM_IMAGE);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_PERI:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    0, 0,
+					    PM_PERIRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_ISP:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    ASB_ISP_M_CTRL, ASB_ISP_S_CTRL,
+					    PM_ISPRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_H264:
+		return bcm2835_asb_power_on(pd, PM_IMAGE,
+					    ASB_H264_M_CTRL, ASB_H264_S_CTRL,
+					    PM_H264RSTN);
+
+	case BCM2835_POWER_DOMAIN_USB:
+		PM_WRITE(PM_USB, PM_USB_CTRLEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI0:
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN);
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN | PM_DSI0_LDOHPEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI1:
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN);
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN | PM_DSI1_LDOHPEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_CCP2TX:
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN);
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN | PM_CCP2TX_LDOEN);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_HDMI:
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_RSTDR);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_CTRLEN);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_LDOPD);
+		usleep_range(100, 200);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_RSTDR);
+		return 0;
+
+	default:
+		dev_err(power->dev, "Invalid domain %d\n", pd->domain);
+		return -EINVAL;
+	}
+}
+
+static int bcm2835_power_pd_power_off(struct generic_pm_domain *domain)
+{
+	struct bcm2835_power_domain *pd =
+		container_of(domain, struct bcm2835_power_domain, base);
+	struct bcm2835_power *power = pd->power;
+
+	switch (pd->domain) {
+	case BCM2835_POWER_DOMAIN_GRAFX:
+		return bcm2835_power_power_off(pd, PM_GRAFX);
+
+	case BCM2835_POWER_DOMAIN_GRAFX_V3D:
+		return bcm2835_asb_power_off(pd, PM_GRAFX,
+					     ASB_V3D_M_CTRL, ASB_V3D_S_CTRL,
+					     PM_V3DRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE:
+		return bcm2835_power_power_off(pd, PM_IMAGE);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_PERI:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     0, 0,
+					     PM_PERIRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_ISP:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     ASB_ISP_M_CTRL, ASB_ISP_S_CTRL,
+					     PM_ISPRSTN);
+
+	case BCM2835_POWER_DOMAIN_IMAGE_H264:
+		return bcm2835_asb_power_off(pd, PM_IMAGE,
+					     ASB_H264_M_CTRL, ASB_H264_S_CTRL,
+					     PM_H264RSTN);
+
+	case BCM2835_POWER_DOMAIN_USB:
+		PM_WRITE(PM_USB, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI0:
+		PM_WRITE(PM_DSI0, PM_DSI0_CTRLEN);
+		PM_WRITE(PM_DSI0, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_DSI1:
+		PM_WRITE(PM_DSI1, PM_DSI1_CTRLEN);
+		PM_WRITE(PM_DSI1, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_CCP2TX:
+		PM_WRITE(PM_CCP2TX, PM_CCP2TX_CTRLEN);
+		PM_WRITE(PM_CCP2TX, 0);
+		return 0;
+
+	case BCM2835_POWER_DOMAIN_HDMI:
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) | PM_HDMI_LDOPD);
+		PM_WRITE(PM_HDMI, PM_READ(PM_HDMI) & ~PM_HDMI_CTRLEN);
+		return 0;
+
+	default:
+		dev_err(power->dev, "Invalid domain %d\n", pd->domain);
+		return -EINVAL;
+	}
+}
+
+static int
+bcm2835_init_power_domain(struct bcm2835_power *power,
+			  int pd_xlate_index, const char *name)
+{
+	struct device *dev = power->dev;
+	struct bcm2835_power_domain *dom = &power->domains[pd_xlate_index];
+
+	dom->clk = devm_clk_get(dev->parent, name);
+	if (IS_ERR(dom->clk)) {
+		int ret = PTR_ERR(dom->clk);
+
+		if (ret == -EPROBE_DEFER)
+			return ret;
+
+		/* Some domains don't have a clk, so make sure that we
+		 * don't deref an error pointer later.
+		 */
+		dom->clk = NULL;
+	}
+
+	dom->base.name = name;
+	dom->base.power_on = bcm2835_power_pd_power_on;
+	dom->base.power_off = bcm2835_power_pd_power_off;
+
+	dom->domain = pd_xlate_index;
+	dom->power = power;
+
+	/* XXX: on/off at boot? */
+	pm_genpd_init(&dom->base, NULL, true);
+
+	power->pd_xlate.domains[pd_xlate_index] = &dom->base;
+
+	return 0;
+}
+
+/** bcm2835_reset_reset - Resets a block that has a reset line in the
+ * PM block.
+ *
+ * The consumer of the reset controller must have the power domain up
+ * -- there's no reset ability with the power domain down.  To reset
+ * the sub-block, we just disable its access to memory through the
+ * ASB, reset, and re-enable.
+ */
+static int bcm2835_reset_reset(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power,
+						   reset);
+	struct bcm2835_power_domain *pd;
+	int ret;
+
+	switch (id) {
+	case BCM2835_RESET_V3D:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_GRAFX_V3D];
+		break;
+	case BCM2835_RESET_H264:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_H264];
+		break;
+	case BCM2835_RESET_ISP:
+		pd = &power->domains[BCM2835_POWER_DOMAIN_IMAGE_ISP];
+		break;
+	default:
+		dev_err(power->dev, "Bad reset id %ld\n", id);
+		return -EINVAL;
+	}
+
+	ret = bcm2835_power_pd_power_off(&pd->base);
+	if (ret)
+		return ret;
+
+	return bcm2835_power_pd_power_on(&pd->base);
+}
+
+static int bcm2835_reset_status(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct bcm2835_power *power = container_of(rcdev, struct bcm2835_power,
+						   reset);
+
+	switch (id) {
+	case BCM2835_RESET_V3D:
+		return !PM_READ(PM_GRAFX & PM_V3DRSTN);
+	case BCM2835_RESET_H264:
+		return !PM_READ(PM_IMAGE & PM_H264RSTN);
+	case BCM2835_RESET_ISP:
+		return !PM_READ(PM_IMAGE & PM_ISPRSTN);
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct reset_control_ops bcm2835_reset_ops = {
+	.reset = bcm2835_reset_reset,
+	.status = bcm2835_reset_status,
+};
+
+static const char *const power_domain_names[] = {
+	[BCM2835_POWER_DOMAIN_GRAFX] = "grafx",
+	[BCM2835_POWER_DOMAIN_GRAFX_V3D] = "v3d",
+
+	[BCM2835_POWER_DOMAIN_IMAGE] = "image",
+	[BCM2835_POWER_DOMAIN_IMAGE_PERI] = "peri_image",
+	[BCM2835_POWER_DOMAIN_IMAGE_H264] = "h264",
+	[BCM2835_POWER_DOMAIN_IMAGE_ISP] = "isp",
+
+	[BCM2835_POWER_DOMAIN_USB] = "usb",
+	[BCM2835_POWER_DOMAIN_DSI0] = "dsi0",
+	[BCM2835_POWER_DOMAIN_DSI1] = "dsi1",
+	[BCM2835_POWER_DOMAIN_CAM0] = "cam0",
+	[BCM2835_POWER_DOMAIN_CAM1] = "cam1",
+	[BCM2835_POWER_DOMAIN_CCP2TX] = "ccp2tx",
+	[BCM2835_POWER_DOMAIN_HDMI] = "hdmi",
+};
+
+static int bcm2835_power_probe(struct platform_device *pdev)
+{
+	struct bcm2835_pm *pm = dev_get_drvdata(pdev->dev.parent);
+	struct device *dev = &pdev->dev;
+	struct bcm2835_power *power;
+	static const struct {
+		int parent, child;
+	} domain_deps[] = {
+		{ BCM2835_POWER_DOMAIN_GRAFX, BCM2835_POWER_DOMAIN_GRAFX_V3D },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_PERI },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_H264 },
+		{ BCM2835_POWER_DOMAIN_IMAGE, BCM2835_POWER_DOMAIN_IMAGE_ISP },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_USB },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM0 },
+		{ BCM2835_POWER_DOMAIN_IMAGE_PERI, BCM2835_POWER_DOMAIN_CAM1 },
+	};
+	int ret = 0, i;
+	u32 id;
+
+	power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
+	if (!power)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, power);
+
+	power->dev = dev;
+	power->base = pm->base;
+	power->asb = pm->asb;
+	power->rpivid_asb = pm->rpivid_asb;
+
+	id = readl(power->asb + ASB_AXI_BRDG_ID);
+	if (id != BCM2835_BRDG_ID /* "BRDG" */) {
+		dev_err(dev, "ASB register ID returned 0x%08x\n", id);
+		return -ENODEV;
+	}
+
+	if (power->rpivid_asb) {
+		id = readl(power->rpivid_asb + ASB_AXI_BRDG_ID);
+		if (id != BCM2835_BRDG_ID /* "BRDG" */) {
+			dev_err(dev, "RPiVid ASB register ID returned 0x%08x\n",
+				     id);
+			return -ENODEV;
+		}
+	}
+
+	power->pd_xlate.domains = devm_kcalloc(dev,
+					       ARRAY_SIZE(power_domain_names),
+					       sizeof(*power->pd_xlate.domains),
+					       GFP_KERNEL);
+	if (!power->pd_xlate.domains)
+		return -ENOMEM;
+
+	power->pd_xlate.num_domains = ARRAY_SIZE(power_domain_names);
+
+	for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
+		ret = bcm2835_init_power_domain(power, i, power_domain_names[i]);
+		if (ret)
+			goto fail;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(domain_deps); i++) {
+		pm_genpd_add_subdomain(&power->domains[domain_deps[i].parent].base,
+				       &power->domains[domain_deps[i].child].base);
+	}
+
+	power->reset.owner = THIS_MODULE;
+	power->reset.nr_resets = BCM2835_RESET_COUNT;
+	power->reset.ops = &bcm2835_reset_ops;
+	power->reset.of_node = dev->parent->of_node;
+
+	ret = devm_reset_controller_register(dev, &power->reset);
+	if (ret)
+		goto fail;
+
+	of_genpd_add_provider_onecell(dev->parent->of_node, &power->pd_xlate);
+
+	dev_info(dev, "Broadcom BCM2835 power domains driver");
+	return 0;
+
+fail:
+	for (i = 0; i < ARRAY_SIZE(power_domain_names); i++) {
+		struct generic_pm_domain *dom = &power->domains[i].base;
+
+		if (dom->name)
+			pm_genpd_remove(dom);
+	}
+	return ret;
+}
+
+static struct platform_driver bcm2835_power_driver = {
+	.probe		= bcm2835_power_probe,
+	.driver = {
+		.name =	"bcm2835-power",
+	},
+};
+module_platform_driver(bcm2835_power_driver);
+
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_DESCRIPTION("Driver for Broadcom BCM2835 PM power domains and reset");
diff --git a/drivers/pmdomain/bcm/bcm63xx-power.c b/drivers/pmdomain/bcm/bcm63xx-power.c
new file mode 100644
index 000000000000..98b0c2430dbc
--- /dev/null
+++ b/drivers/pmdomain/bcm/bcm63xx-power.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * BCM63xx Power Domain Controller Driver
+ *
+ * Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com>
+ */
+
+#include <dt-bindings/soc/bcm6318-pm.h>
+#include <dt-bindings/soc/bcm6328-pm.h>
+#include <dt-bindings/soc/bcm6362-pm.h>
+#include <dt-bindings/soc/bcm63268-pm.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/of.h>
+
+struct bcm63xx_power_dev {
+	struct generic_pm_domain genpd;
+	struct bcm63xx_power *power;
+	uint32_t mask;
+};
+
+struct bcm63xx_power {
+	void __iomem *base;
+	spinlock_t lock;
+	struct bcm63xx_power_dev *dev;
+	struct genpd_onecell_data genpd_data;
+	struct generic_pm_domain **genpd;
+};
+
+struct bcm63xx_power_data {
+	const char * const name;
+	uint8_t bit;
+	unsigned int flags;
+};
+
+static int bcm63xx_power_get_state(struct bcm63xx_power_dev *pmd, bool *is_on)
+{
+	struct bcm63xx_power *power = pmd->power;
+
+	if (!pmd->mask) {
+		*is_on = false;
+		return -EINVAL;
+	}
+
+	*is_on = !(__raw_readl(power->base) & pmd->mask);
+
+	return 0;
+}
+
+static int bcm63xx_power_set_state(struct bcm63xx_power_dev *pmd, bool on)
+{
+	struct bcm63xx_power *power = pmd->power;
+	unsigned long flags;
+	uint32_t val;
+
+	if (!pmd->mask)
+		return -EINVAL;
+
+	spin_lock_irqsave(&power->lock, flags);
+	val = __raw_readl(power->base);
+	if (on)
+		val &= ~pmd->mask;
+	else
+		val |= pmd->mask;
+	__raw_writel(val, power->base);
+	spin_unlock_irqrestore(&power->lock, flags);
+
+	return 0;
+}
+
+static int bcm63xx_power_on(struct generic_pm_domain *genpd)
+{
+	struct bcm63xx_power_dev *pmd = container_of(genpd,
+		struct bcm63xx_power_dev, genpd);
+
+	return bcm63xx_power_set_state(pmd, true);
+}
+
+static int bcm63xx_power_off(struct generic_pm_domain *genpd)
+{
+	struct bcm63xx_power_dev *pmd = container_of(genpd,
+		struct bcm63xx_power_dev, genpd);
+
+	return bcm63xx_power_set_state(pmd, false);
+}
+
+static int bcm63xx_power_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	const struct bcm63xx_power_data *entry, *table;
+	struct bcm63xx_power *power;
+	unsigned int ndom;
+	uint8_t max_bit = 0;
+	int ret;
+
+	power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
+	if (!power)
+		return -ENOMEM;
+
+	power->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(power->base))
+		return PTR_ERR(power->base);
+
+	table = of_device_get_match_data(dev);
+	if (!table)
+		return -EINVAL;
+
+	power->genpd_data.num_domains = 0;
+	ndom = 0;
+	for (entry = table; entry->name; entry++) {
+		max_bit = max(max_bit, entry->bit);
+		ndom++;
+	}
+
+	if (!ndom)
+		return -ENODEV;
+
+	power->genpd_data.num_domains = max_bit + 1;
+
+	power->dev = devm_kcalloc(dev, power->genpd_data.num_domains,
+				  sizeof(struct bcm63xx_power_dev),
+				  GFP_KERNEL);
+	if (!power->dev)
+		return -ENOMEM;
+
+	power->genpd = devm_kcalloc(dev, power->genpd_data.num_domains,
+				    sizeof(struct generic_pm_domain *),
+				    GFP_KERNEL);
+	if (!power->genpd)
+		return -ENOMEM;
+
+	power->genpd_data.domains = power->genpd;
+
+	ndom = 0;
+	for (entry = table; entry->name; entry++) {
+		struct bcm63xx_power_dev *pmd = &power->dev[ndom];
+		bool is_on;
+
+		pmd->power = power;
+		pmd->mask = BIT(entry->bit);
+		pmd->genpd.name = entry->name;
+		pmd->genpd.flags = entry->flags;
+
+		ret = bcm63xx_power_get_state(pmd, &is_on);
+		if (ret)
+			dev_warn(dev, "unable to get current state for %s\n",
+				 pmd->genpd.name);
+
+		pmd->genpd.power_on = bcm63xx_power_on;
+		pmd->genpd.power_off = bcm63xx_power_off;
+
+		pm_genpd_init(&pmd->genpd, NULL, !is_on);
+		power->genpd[entry->bit] = &pmd->genpd;
+
+		ndom++;
+	}
+
+	spin_lock_init(&power->lock);
+
+	ret = of_genpd_add_provider_onecell(np, &power->genpd_data);
+	if (ret) {
+		dev_err(dev, "failed to register genpd driver: %d\n", ret);
+		return ret;
+	}
+
+	dev_info(dev, "registered %u power domains\n", ndom);
+
+	return 0;
+}
+
+static const struct bcm63xx_power_data bcm6318_power_domains[] = {
+	{
+		.name = "pcie",
+		.bit = BCM6318_POWER_DOMAIN_PCIE,
+	}, {
+		.name = "usb",
+		.bit = BCM6318_POWER_DOMAIN_USB,
+	}, {
+		.name = "ephy0",
+		.bit = BCM6318_POWER_DOMAIN_EPHY0,
+	}, {
+		.name = "ephy1",
+		.bit = BCM6318_POWER_DOMAIN_EPHY1,
+	}, {
+		.name = "ephy2",
+		.bit = BCM6318_POWER_DOMAIN_EPHY2,
+	}, {
+		.name = "ephy3",
+		.bit = BCM6318_POWER_DOMAIN_EPHY3,
+	}, {
+		.name = "ldo2p5",
+		.bit = BCM6318_POWER_DOMAIN_LDO2P5,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "ldo2p9",
+		.bit = BCM6318_POWER_DOMAIN_LDO2P9,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "sw1p0",
+		.bit = BCM6318_POWER_DOMAIN_SW1P0,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "pad",
+		.bit = BCM6318_POWER_DOMAIN_PAD,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		/* sentinel */
+	},
+};
+
+static const struct bcm63xx_power_data bcm6328_power_domains[] = {
+	{
+		.name = "adsl2-mips",
+		.bit = BCM6328_POWER_DOMAIN_ADSL2_MIPS,
+	}, {
+		.name = "adsl2-phy",
+		.bit = BCM6328_POWER_DOMAIN_ADSL2_PHY,
+	}, {
+		.name = "adsl2-afe",
+		.bit = BCM6328_POWER_DOMAIN_ADSL2_AFE,
+	}, {
+		.name = "sar",
+		.bit = BCM6328_POWER_DOMAIN_SAR,
+	}, {
+		.name = "pcm",
+		.bit = BCM6328_POWER_DOMAIN_PCM,
+	}, {
+		.name = "usbd",
+		.bit = BCM6328_POWER_DOMAIN_USBD,
+	}, {
+		.name = "usbh",
+		.bit = BCM6328_POWER_DOMAIN_USBH,
+	}, {
+		.name = "pcie",
+		.bit = BCM6328_POWER_DOMAIN_PCIE,
+	}, {
+		.name = "robosw",
+		.bit = BCM6328_POWER_DOMAIN_ROBOSW,
+	}, {
+		.name = "ephy",
+		.bit = BCM6328_POWER_DOMAIN_EPHY,
+	}, {
+		/* sentinel */
+	},
+};
+
+static const struct bcm63xx_power_data bcm6362_power_domains[] = {
+	{
+		.name = "sar",
+		.bit = BCM6362_POWER_DOMAIN_SAR,
+	}, {
+		.name = "ipsec",
+		.bit = BCM6362_POWER_DOMAIN_IPSEC,
+	}, {
+		.name = "mips",
+		.bit = BCM6362_POWER_DOMAIN_MIPS,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "dect",
+		.bit = BCM6362_POWER_DOMAIN_DECT,
+	}, {
+		.name = "usbh",
+		.bit = BCM6362_POWER_DOMAIN_USBH,
+	}, {
+		.name = "usbd",
+		.bit = BCM6362_POWER_DOMAIN_USBD,
+	}, {
+		.name = "robosw",
+		.bit = BCM6362_POWER_DOMAIN_ROBOSW,
+	}, {
+		.name = "pcm",
+		.bit = BCM6362_POWER_DOMAIN_PCM,
+	}, {
+		.name = "periph",
+		.bit = BCM6362_POWER_DOMAIN_PERIPH,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "adsl-phy",
+		.bit = BCM6362_POWER_DOMAIN_ADSL_PHY,
+	}, {
+		.name = "gmii-pads",
+		.bit = BCM6362_POWER_DOMAIN_GMII_PADS,
+	}, {
+		.name = "fap",
+		.bit = BCM6362_POWER_DOMAIN_FAP,
+	}, {
+		.name = "pcie",
+		.bit = BCM6362_POWER_DOMAIN_PCIE,
+	}, {
+		.name = "wlan-pads",
+		.bit = BCM6362_POWER_DOMAIN_WLAN_PADS,
+	}, {
+		/* sentinel */
+	},
+};
+
+static const struct bcm63xx_power_data bcm63268_power_domains[] = {
+	{
+		.name = "sar",
+		.bit = BCM63268_POWER_DOMAIN_SAR,
+	}, {
+		.name = "ipsec",
+		.bit = BCM63268_POWER_DOMAIN_IPSEC,
+	}, {
+		.name = "mips",
+		.bit = BCM63268_POWER_DOMAIN_MIPS,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "dect",
+		.bit = BCM63268_POWER_DOMAIN_DECT,
+	}, {
+		.name = "usbh",
+		.bit = BCM63268_POWER_DOMAIN_USBH,
+	}, {
+		.name = "usbd",
+		.bit = BCM63268_POWER_DOMAIN_USBD,
+	}, {
+		.name = "robosw",
+		.bit = BCM63268_POWER_DOMAIN_ROBOSW,
+	}, {
+		.name = "pcm",
+		.bit = BCM63268_POWER_DOMAIN_PCM,
+	}, {
+		.name = "periph",
+		.bit = BCM63268_POWER_DOMAIN_PERIPH,
+		.flags = GENPD_FLAG_ALWAYS_ON,
+	}, {
+		.name = "vdsl-phy",
+		.bit = BCM63268_POWER_DOMAIN_VDSL_PHY,
+	}, {
+		.name = "vdsl-mips",
+		.bit = BCM63268_POWER_DOMAIN_VDSL_MIPS,
+	}, {
+		.name = "fap",
+		.bit = BCM63268_POWER_DOMAIN_FAP,
+	}, {
+		.name = "pcie",
+		.bit = BCM63268_POWER_DOMAIN_PCIE,
+	}, {
+		.name = "wlan-pads",
+		.bit = BCM63268_POWER_DOMAIN_WLAN_PADS,
+	}, {
+		/* sentinel */
+	},
+};
+
+static const struct of_device_id bcm63xx_power_of_match[] = {
+	{
+		.compatible = "brcm,bcm6318-power-controller",
+		.data = &bcm6318_power_domains,
+	}, {
+		.compatible = "brcm,bcm6328-power-controller",
+		.data = &bcm6328_power_domains,
+	}, {
+		.compatible = "brcm,bcm6362-power-controller",
+		.data = &bcm6362_power_domains,
+	}, {
+		.compatible = "brcm,bcm63268-power-controller",
+		.data = &bcm63268_power_domains,
+	}, {
+		/* sentinel */
+	}
+};
+
+static struct platform_driver bcm63xx_power_driver = {
+	.driver = {
+		.name = "bcm63xx-power-controller",
+		.of_match_table = bcm63xx_power_of_match,
+	},
+	.probe  = bcm63xx_power_probe,
+};
+builtin_platform_driver(bcm63xx_power_driver);
diff --git a/drivers/pmdomain/bcm/raspberrypi-power.c b/drivers/pmdomain/bcm/raspberrypi-power.c
new file mode 100644
index 000000000000..06196ebfe03b
--- /dev/null
+++ b/drivers/pmdomain/bcm/raspberrypi-power.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0
+/* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
+ *
+ * Authors:
+ * Alexander Aring <aar@pengutronix.de>
+ * Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <dt-bindings/power/raspberrypi-power.h>
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
+/*
+ * Firmware indices for the old power domains interface.  Only a few
+ * of them were actually implemented.
+ */
+#define RPI_OLD_POWER_DOMAIN_USB		3
+#define RPI_OLD_POWER_DOMAIN_V3D		10
+
+struct rpi_power_domain {
+	u32 domain;
+	bool enabled;
+	bool old_interface;
+	struct generic_pm_domain base;
+	struct rpi_firmware *fw;
+};
+
+struct rpi_power_domains {
+	bool has_new_interface;
+	struct genpd_onecell_data xlate;
+	struct rpi_firmware *fw;
+	struct rpi_power_domain domains[RPI_POWER_DOMAIN_COUNT];
+};
+
+/*
+ * Packet definition used by RPI_FIRMWARE_SET_POWER_STATE and
+ * RPI_FIRMWARE_SET_DOMAIN_STATE
+ */
+struct rpi_power_domain_packet {
+	u32 domain;
+	u32 on;
+};
+
+/*
+ * Asks the firmware to enable or disable power on a specific power
+ * domain.
+ */
+static int rpi_firmware_set_power(struct rpi_power_domain *rpi_domain, bool on)
+{
+	struct rpi_power_domain_packet packet;
+
+	packet.domain = rpi_domain->domain;
+	packet.on = on;
+	return rpi_firmware_property(rpi_domain->fw,
+				     rpi_domain->old_interface ?
+				     RPI_FIRMWARE_SET_POWER_STATE :
+				     RPI_FIRMWARE_SET_DOMAIN_STATE,
+				     &packet, sizeof(packet));
+}
+
+static int rpi_domain_off(struct generic_pm_domain *domain)
+{
+	struct rpi_power_domain *rpi_domain =
+		container_of(domain, struct rpi_power_domain, base);
+
+	return rpi_firmware_set_power(rpi_domain, false);
+}
+
+static int rpi_domain_on(struct generic_pm_domain *domain)
+{
+	struct rpi_power_domain *rpi_domain =
+		container_of(domain, struct rpi_power_domain, base);
+
+	return rpi_firmware_set_power(rpi_domain, true);
+}
+
+static void rpi_common_init_power_domain(struct rpi_power_domains *rpi_domains,
+					 int xlate_index, const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	dom->fw = rpi_domains->fw;
+
+	dom->base.name = name;
+	dom->base.power_on = rpi_domain_on;
+	dom->base.power_off = rpi_domain_off;
+
+	/*
+	 * Treat all power domains as off at boot.
+	 *
+	 * The firmware itself may be keeping some domains on, but
+	 * from Linux's perspective all we control is the refcounts
+	 * that we give to the firmware, and we can't ask the firmware
+	 * to turn off something that we haven't ourselves turned on.
+	 */
+	pm_genpd_init(&dom->base, NULL, true);
+
+	rpi_domains->xlate.domains[xlate_index] = &dom->base;
+}
+
+static void rpi_init_power_domain(struct rpi_power_domains *rpi_domains,
+				  int xlate_index, const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	if (!rpi_domains->has_new_interface)
+		return;
+
+	/* The DT binding index is the firmware's domain index minus one. */
+	dom->domain = xlate_index + 1;
+
+	rpi_common_init_power_domain(rpi_domains, xlate_index, name);
+}
+
+static void rpi_init_old_power_domain(struct rpi_power_domains *rpi_domains,
+				      int xlate_index, int domain,
+				      const char *name)
+{
+	struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
+
+	dom->old_interface = true;
+	dom->domain = domain;
+
+	rpi_common_init_power_domain(rpi_domains, xlate_index, name);
+}
+
+/*
+ * Detects whether the firmware supports the new power domains interface.
+ *
+ * The firmware doesn't actually return an error on an unknown tag,
+ * and just skips over it, so we do the detection by putting an
+ * unexpected value in the return field and checking if it was
+ * unchanged.
+ */
+static bool
+rpi_has_new_domain_support(struct rpi_power_domains *rpi_domains)
+{
+	struct rpi_power_domain_packet packet;
+	int ret;
+
+	packet.domain = RPI_POWER_DOMAIN_ARM;
+	packet.on = ~0;
+
+	ret = rpi_firmware_property(rpi_domains->fw,
+				    RPI_FIRMWARE_GET_DOMAIN_STATE,
+				    &packet, sizeof(packet));
+
+	return ret == 0 && packet.on != ~0;
+}
+
+static int rpi_power_probe(struct platform_device *pdev)
+{
+	struct device_node *fw_np;
+	struct device *dev = &pdev->dev;
+	struct rpi_power_domains *rpi_domains;
+
+	rpi_domains = devm_kzalloc(dev, sizeof(*rpi_domains), GFP_KERNEL);
+	if (!rpi_domains)
+		return -ENOMEM;
+
+	rpi_domains->xlate.domains =
+		devm_kcalloc(dev,
+			     RPI_POWER_DOMAIN_COUNT,
+			     sizeof(*rpi_domains->xlate.domains),
+			     GFP_KERNEL);
+	if (!rpi_domains->xlate.domains)
+		return -ENOMEM;
+
+	rpi_domains->xlate.num_domains = RPI_POWER_DOMAIN_COUNT;
+
+	fw_np = of_parse_phandle(pdev->dev.of_node, "firmware", 0);
+	if (!fw_np) {
+		dev_err(&pdev->dev, "no firmware node\n");
+		return -ENODEV;
+	}
+
+	rpi_domains->fw = devm_rpi_firmware_get(&pdev->dev, fw_np);
+	of_node_put(fw_np);
+	if (!rpi_domains->fw)
+		return -EPROBE_DEFER;
+
+	rpi_domains->has_new_interface =
+		rpi_has_new_domain_support(rpi_domains);
+
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C0, "I2C0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C1, "I2C1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_I2C2, "I2C2");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VIDEO_SCALER,
+			      "VIDEO_SCALER");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VPU1, "VPU1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_HDMI, "HDMI");
+
+	/*
+	 * Use the old firmware interface for USB power, so that we
+	 * can turn it on even if the firmware hasn't been updated.
+	 */
+	rpi_init_old_power_domain(rpi_domains, RPI_POWER_DOMAIN_USB,
+				  RPI_OLD_POWER_DOMAIN_USB, "USB");
+
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_VEC, "VEC");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_JPEG, "JPEG");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_H264, "H264");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_V3D, "V3D");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ISP, "ISP");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM0, "UNICAM0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_UNICAM1, "UNICAM1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2RX, "CCP2RX");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CSI2, "CSI2");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CPI, "CPI");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI0, "DSI0");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_DSI1, "DSI1");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_TRANSPOSER,
+			      "TRANSPOSER");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CCP2TX, "CCP2TX");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_CDP, "CDP");
+	rpi_init_power_domain(rpi_domains, RPI_POWER_DOMAIN_ARM, "ARM");
+
+	of_genpd_add_provider_onecell(dev->of_node, &rpi_domains->xlate);
+
+	platform_set_drvdata(pdev, rpi_domains);
+
+	return 0;
+}
+
+static const struct of_device_id rpi_power_of_match[] = {
+	{ .compatible = "raspberrypi,bcm2835-power", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, rpi_power_of_match);
+
+static struct platform_driver rpi_power_driver = {
+	.driver = {
+		.name = "raspberrypi-power",
+		.of_match_table = rpi_power_of_match,
+	},
+	.probe		= rpi_power_probe,
+};
+builtin_platform_driver(rpi_power_driver);
+
+MODULE_AUTHOR("Alexander Aring <aar@pengutronix.de>");
+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+MODULE_DESCRIPTION("Raspberry Pi power domain driver");