4 files changed, 589 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 461db0a8233f..055467fb2019 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15352,6 +15352,7 @@ F:	drivers/reset/reset-ti-sci.c
 F:      Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
 F:      Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
 F:      drivers/irqchip/irq-ti-sci-intr.c
+F:      drivers/irqchip/irq-ti-sci-inta.c
 
 Texas Instruments ASoC drivers
 M:      Peter Ujfalusi <peter.ujfalusi@ti.com>
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 88bce736d1de..2c8d5daad57c 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -429,6 +429,16 @@ config TI_SCI_INTR_IRQCHIP
           If you wish to use interrupt router irq resources managed by the
           TI System Controller, say Y here. Otherwise, say N.
 
+config TI_SCI_INTA_IRQCHIP
+        bool
+        depends on TI_SCI_PROTOCOL
+        select IRQ_DOMAIN_HIERARCHY
+        help
+          This enables the irqchip driver support for K3 Interrupt aggregator
+          over TI System Control Interface available on some new TI's SoCs.
+          If you wish to use interrupt aggregator irq resources managed by the
+          TI System Controller, say Y here. Otherwise, say N.
+
 endmenu
 
 config SIFIVE_PLIC
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index fa5c865788b5..8a33013da953 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -98,3 +98,4 @@ obj-$(CONFIG_IMX_IRQSTEER)		+= irq-imx-irqsteer.o
 obj-$(CONFIG_MADERA_IRQ)                += irq-madera.o
 obj-$(CONFIG_LS1X_IRQ)                  += irq-ls1x.o
 obj-$(CONFIG_TI_SCI_INTR_IRQCHIP)       += irq-ti-sci-intr.o
+obj-$(CONFIG_TI_SCI_INTA_IRQCHIP)       += irq-ti-sci-inta.o
diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
new file mode 100644
index 000000000000..87e0abe0041f
--- /dev/null
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -0,0 +1,577 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Texas Instruments' K3 Interrupt Aggregator irqchip driver
+ *
+ * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
+ *      Lokesh Vutla <lokeshvutla@ti.com>
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/interrupt.h>
+#include <linux/msi.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+#include <asm-generic/msi.h>
+
+#define TI_SCI_DEV_ID_MASK      0xffff
+#define TI_SCI_DEV_ID_SHIFT     16
+#define TI_SCI_IRQ_ID_MASK      0xffff
+#define TI_SCI_IRQ_ID_SHIFT     0
+#define HWIRQ_TO_DEVID(hwirq)   (((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
+                                 (TI_SCI_DEV_ID_MASK))
+#define HWIRQ_TO_IRQID(hwirq)   ((hwirq) & (TI_SCI_IRQ_ID_MASK))
+
+#define MAX_EVENTS_PER_VINT     64
+#define VINT_ENABLE_SET_OFFSET  0x0
+#define VINT_ENABLE_CLR_OFFSET  0x8
+#define VINT_STATUS_OFFSET      0x18
+
+/**
+ * struct ti_sci_inta_event_desc - Description of an event coming to
+ *                                 Interrupt Aggregator. This serves
+ *                                 as a mapping table for global event,
+ *                                 hwirq and vint bit.
+ * @global_event:       Global event number corresponding to this event
+ * @hwirq:              Hwirq of the incoming interrupt
+ * @vint_bit:           Corresponding vint bit to which this event is attached.
+ */
+struct ti_sci_inta_event_desc {
+        u16 global_event;
+        u32 hwirq;
+        u8 vint_bit;
+};
+
+/**
+ * struct ti_sci_inta_vint_desc - Description of a virtual interrupt coming out
+ *                                of Interrupt Aggregator.
+ * @domain:             Pointer to IRQ domain to which this vint belongs.
+ * @list:               List entry for the vint list
+ * @event_map:          Bitmap to manage the allocation of events to vint.
+ * @events:             Array of event descriptors assigned to this vint.
+ * @parent_virq:        Linux IRQ number that gets attached to parent
+ * @vint_id:            TISCI vint ID
+ */
+struct ti_sci_inta_vint_desc {
+        struct irq_domain *domain;
+        struct list_head list;
+        DECLARE_BITMAP(event_map, MAX_EVENTS_PER_VINT);
+        struct ti_sci_inta_event_desc events[MAX_EVENTS_PER_VINT];
+        unsigned int parent_virq;
+        u16 vint_id;
+};
+
+/**
+ * struct ti_sci_inta_irq_domain - Structure representing a TISCI based
+ *                                 Interrupt Aggregator IRQ domain.
+ * @sci:                Pointer to TISCI handle
+ * @vint:               TISCI resource pointer representing IA inerrupts.
+ * @global_event:       TISCI resource pointer representing global events.
+ * @vint_list:          List of the vints active in the system
+ * @vint_mutex:         Mutex to protect vint_list
+ * @base:               Base address of the memory mapped IO registers
+ * @pdev:               Pointer to platform device.
+ */
+struct ti_sci_inta_irq_domain {
+        const struct ti_sci_handle *sci;
+        struct ti_sci_resource *vint;
+        struct ti_sci_resource *global_event;
+        struct list_head vint_list;
+        /* Mutex to protect vint list */
+        struct mutex vint_mutex;
+        void __iomem *base;
+        struct platform_device *pdev;
+};
+
+#define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
+                                        events[i])
+
+/**
+ * ti_sci_inta_irq_handler() - Chained IRQ handler for the vint irqs
+ * @desc:       Pointer to irq_desc corresponding to the irq
+ */
+static void ti_sci_inta_irq_handler(struct irq_desc *desc)
+{
+        struct ti_sci_inta_vint_desc *vint_desc;
+        struct ti_sci_inta_irq_domain *inta;
+        struct irq_domain *domain;
+        unsigned int virq, bit;
+        unsigned long val;
+
+        vint_desc = irq_desc_get_handler_data(desc);
+        domain = vint_desc->domain;
+        inta = domain->host_data;
+
+        chained_irq_enter(irq_desc_get_chip(desc), desc);
+
+        val = readq_relaxed(inta->base + vint_desc->vint_id * 0x1000 +
+                            VINT_STATUS_OFFSET);
+
+        for_each_set_bit(bit, &val, MAX_EVENTS_PER_VINT) {
+                virq = irq_find_mapping(domain, vint_desc->events[bit].hwirq);
+                if (virq)
+                        generic_handle_irq(virq);
+        }
+
+        chained_irq_exit(irq_desc_get_chip(desc), desc);
+}
+
+/**
+ * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
+ * @domain:     IRQ domain corresponding to Interrupt Aggregator
+ *
+ * Return 0 if all went well else corresponding error value.
+ */
+static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_domain *domain)
+{
+        struct ti_sci_inta_irq_domain *inta = domain->host_data;
+        struct ti_sci_inta_vint_desc *vint_desc;
+        struct irq_fwspec parent_fwspec;
+        unsigned int parent_virq;
+        u16 vint_id;
+
+        vint_id = ti_sci_get_free_resource(inta->vint);
+        if (vint_id == TI_SCI_RESOURCE_NULL)
+                return ERR_PTR(-EINVAL);
+
+        vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
+        if (!vint_desc)
+                return ERR_PTR(-ENOMEM);
+
+        vint_desc->domain = domain;
+        vint_desc->vint_id = vint_id;
+        INIT_LIST_HEAD(&vint_desc->list);
+
+        parent_fwspec.fwnode = of_node_to_fwnode(of_irq_find_parent(dev_of_node(&inta->pdev->dev)));
+        parent_fwspec.param_count = 2;
+        parent_fwspec.param[0] = inta->pdev->id;
+        parent_fwspec.param[1] = vint_desc->vint_id;
+
+        parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
+        if (parent_virq <= 0) {
+                kfree(vint_desc);
+                return ERR_PTR(parent_virq);
+        }
+        vint_desc->parent_virq = parent_virq;
+
+        list_add_tail(&vint_desc->list, &inta->vint_list);
+        irq_set_chained_handler_and_data(vint_desc->parent_virq,
+                                         ti_sci_inta_irq_handler, vint_desc);
+
+        return vint_desc;
+}
+
+/**
+ * ti_sci_inta_alloc_event() - Attach an event to a IA vint.
+ * @vint_desc:  Pointer to vint_desc to which the event gets attached
+ * @free_bit:   Bit inside vint to which event gets attached
+ * @hwirq:      hwirq of the input event
+ *
+ * Return event_desc pointer if all went ok else appropriate error value.
+ */
+static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_event(struct ti_sci_inta_vint_desc *vint_desc,
+                                                              u16 free_bit,
+                                                              u32 hwirq)
+{
+        struct ti_sci_inta_irq_domain *inta = vint_desc->domain->host_data;
+        struct ti_sci_inta_event_desc *event_desc;
+        u16 dev_id, dev_index;
+        int err;
+
+        dev_id = HWIRQ_TO_DEVID(hwirq);
+        dev_index = HWIRQ_TO_IRQID(hwirq);
+
+        event_desc = &vint_desc->events[free_bit];
+        event_desc->hwirq = hwirq;
+        event_desc->vint_bit = free_bit;
+        event_desc->global_event = ti_sci_get_free_resource(inta->global_event);
+        if (event_desc->global_event == TI_SCI_RESOURCE_NULL)
+                return ERR_PTR(-EINVAL);
+
+        err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,
+                                                      dev_id, dev_index,
+                                                      inta->pdev->id,
+                                                      vint_desc->vint_id,
+                                                      event_desc->global_event,
+                                                      free_bit);
+        if (err)
+                goto free_global_event;
+
+        return event_desc;
+free_global_event:
+        ti_sci_release_resource(inta->global_event, event_desc->global_event);
+        return ERR_PTR(err);
+}
+
+/**
+ * ti_sci_inta_alloc_irq() -  Allocate an irq within INTA domain
+ * @domain:     irq_domain pointer corresponding to INTA
+ * @hwirq:      hwirq of the input event
+ *
+ * Note: Allocation happens in the following manner:
+ *      - Find a free bit available in any of the vints available in the list.
+ *      - If not found, allocate a vint from the vint pool
+ *      - Attach the free bit to input hwirq.
+ * Return event_desc if all went ok else appropriate error value.
+ */
+static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_irq(struct irq_domain *domain,
+                                                            u32 hwirq)
+{
+        struct ti_sci_inta_irq_domain *inta = domain->host_data;
+        struct ti_sci_inta_vint_desc *vint_desc = NULL;
+        struct ti_sci_inta_event_desc *event_desc;
+        u16 free_bit;
+
+        mutex_lock(&inta->vint_mutex);
+        list_for_each_entry(vint_desc, &inta->vint_list, list) {
+                free_bit = find_first_zero_bit(vint_desc->event_map,
+                                               MAX_EVENTS_PER_VINT);
+                if (free_bit != MAX_EVENTS_PER_VINT) {
+                        set_bit(free_bit, vint_desc->event_map);
+                        goto alloc_event;
+                }
+        }
+
+        /* No free bits available. Allocate a new vint */
+        vint_desc = ti_sci_inta_alloc_parent_irq(domain);
+        if (IS_ERR(vint_desc)) {
+                mutex_unlock(&inta->vint_mutex);
+                return ERR_PTR(PTR_ERR(vint_desc));
+        }
+
+        free_bit = find_first_zero_bit(vint_desc->event_map,
+                                       MAX_EVENTS_PER_VINT);
+        set_bit(free_bit, vint_desc->event_map);
+
+alloc_event:
+        event_desc = ti_sci_inta_alloc_event(vint_desc, free_bit, hwirq);
+        if (IS_ERR(event_desc))
+                clear_bit(free_bit, vint_desc->event_map);
+
+        mutex_unlock(&inta->vint_mutex);
+        return event_desc;
+}
+
+/**
+ * ti_sci_inta_free_parent_irq() - Free a parent irq to INTA
+ * @inta:       Pointer to inta domain.
+ * @vint_desc:  Pointer to vint_desc that needs to be freed.
+ */
+static void ti_sci_inta_free_parent_irq(struct ti_sci_inta_irq_domain *inta,
+                                        struct ti_sci_inta_vint_desc *vint_desc)
+{
+        if (find_first_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT) == MAX_EVENTS_PER_VINT) {
+                list_del(&vint_desc->list);
+                ti_sci_release_resource(inta->vint, vint_desc->vint_id);
+                irq_dispose_mapping(vint_desc->parent_virq);
+                kfree(vint_desc);
+        }
+}
+
+/**
+ * ti_sci_inta_free_irq() - Free an IRQ within INTA domain
+ * @event_desc: Pointer to event_desc that needs to be freed.
+ * @hwirq:      Hwirq number within INTA domain that needs to be freed
+ */
+static void ti_sci_inta_free_irq(struct ti_sci_inta_event_desc *event_desc,
+                                 u32 hwirq)
+{
+        struct ti_sci_inta_vint_desc *vint_desc;
+        struct ti_sci_inta_irq_domain *inta;
+
+        vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
+        inta = vint_desc->domain->host_data;
+        /* free event irq */
+        mutex_lock(&inta->vint_mutex);
+        inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
+                                                 HWIRQ_TO_DEVID(hwirq),
+                                                 HWIRQ_TO_IRQID(hwirq),
+                                                 inta->pdev->id,
+                                                 vint_desc->vint_id,
+                                                 event_desc->global_event,
+                                                 event_desc->vint_bit);
+
+        clear_bit(event_desc->vint_bit, vint_desc->event_map);
+        ti_sci_release_resource(inta->global_event, event_desc->global_event);
+        event_desc->global_event = TI_SCI_RESOURCE_NULL;
+        event_desc->hwirq = 0;
+
+        ti_sci_inta_free_parent_irq(inta, vint_desc);
+        mutex_unlock(&inta->vint_mutex);
+}
+
+/**
+ * ti_sci_inta_request_resources() - Allocate resources for input irq
+ * @data: Pointer to corresponding irq_data
+ *
+ * Note: This is the core api where the actual allocation happens for input
+ *       hwirq. This allocation involves creating a parent irq for vint.
+ *       If this is done in irq_domain_ops.alloc() then a deadlock is reached
+ *       for allocation. So this allocation is being done in request_resources()
+ *
+ * Return: 0 if all went well else corresponding error.
+ */
+static int ti_sci_inta_request_resources(struct irq_data *data)
+{
+        struct ti_sci_inta_event_desc *event_desc;
+
+        event_desc = ti_sci_inta_alloc_irq(data->domain, data->hwirq);
+        if (IS_ERR(event_desc))
+                return PTR_ERR(event_desc);
+
+        data->chip_data = event_desc;
+
+        return 0;
+}
+
+/**
+ * ti_sci_inta_release_resources - Release resources for input irq
+ * @data: Pointer to corresponding irq_data
+ *
+ * Note: Corresponding to request_resources(), all the unmapping and deletion
+ *       of parent vint irqs happens in this api.
+ */
+static void ti_sci_inta_release_resources(struct irq_data *data)
+{
+        struct ti_sci_inta_event_desc *event_desc;
+
+        event_desc = irq_data_get_irq_chip_data(data);
+        ti_sci_inta_free_irq(event_desc, data->hwirq);
+}
+
+/**
+ * ti_sci_inta_manage_event() - Control the event based on the offset
+ * @data:       Pointer to corresponding irq_data
+ * @offset:     register offset using which event is controlled.
+ */
+static void ti_sci_inta_manage_event(struct irq_data *data, u32 offset)
+{
+        struct ti_sci_inta_event_desc *event_desc;
+        struct ti_sci_inta_vint_desc *vint_desc;
+        struct ti_sci_inta_irq_domain *inta;
+
+        event_desc = irq_data_get_irq_chip_data(data);
+        vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
+        inta = data->domain->host_data;
+
+        writeq_relaxed(BIT(event_desc->vint_bit),
+                       inta->base + vint_desc->vint_id * 0x1000 + offset);
+}
+
+/**
+ * ti_sci_inta_mask_irq() - Mask an event
+ * @data:       Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_mask_irq(struct irq_data *data)
+{
+        ti_sci_inta_manage_event(data, VINT_ENABLE_CLR_OFFSET);
+}
+
+/**
+ * ti_sci_inta_unmask_irq() - Unmask an event
+ * @data:       Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_unmask_irq(struct irq_data *data)
+{
+        ti_sci_inta_manage_event(data, VINT_ENABLE_SET_OFFSET);
+}
+
+/**
+ * ti_sci_inta_ack_irq() - Ack an event
+ * @data:       Pointer to corresponding irq_data
+ */
+static void ti_sci_inta_ack_irq(struct irq_data *data)
+{
+        /*
+         * Do not clear the event if hardware is capable of sending
+         * a down event.
+         */
+        if (irqd_get_trigger_type(data) != IRQF_TRIGGER_HIGH)
+                ti_sci_inta_manage_event(data, VINT_STATUS_OFFSET);
+}
+
+static int ti_sci_inta_set_affinity(struct irq_data *d,
+                                    const struct cpumask *mask_val, bool force)
+{
+        return -EINVAL;
+}
+
+/**
+ * ti_sci_inta_set_type() - Update the trigger type of the irq.
+ * @data:       Pointer to corresponding irq_data
+ * @type:       Trigger type as specified by user
+ *
+ * Note: This updates the handle_irq callback for level msi.
+ *
+ * Return 0 if all went well else appropriate error.
+ */
+static int ti_sci_inta_set_type(struct irq_data *data, unsigned int type)
+{
+        /*
+         * .alloc default sets handle_edge_irq. But if the user specifies
+         * that IRQ is level MSI, then update the handle to handle_level_irq
+         */
+        switch (type & IRQ_TYPE_SENSE_MASK) {
+        case IRQF_TRIGGER_HIGH:
+                irq_set_handler_locked(data, handle_level_irq);
+                return 0;
+        case IRQF_TRIGGER_RISING:
+                return 0;
+        default:
+                return -EINVAL;
+        }
+
+        return -EINVAL;
+}
+
+static struct irq_chip ti_sci_inta_irq_chip = {
+        .name                   = "INTA",
+        .irq_ack                = ti_sci_inta_ack_irq,
+        .irq_mask               = ti_sci_inta_mask_irq,
+        .irq_set_type           = ti_sci_inta_set_type,
+        .irq_unmask             = ti_sci_inta_unmask_irq,
+        .irq_set_affinity       = ti_sci_inta_set_affinity,
+        .irq_request_resources  = ti_sci_inta_request_resources,
+        .irq_release_resources  = ti_sci_inta_release_resources,
+};
+
+/**
+ * ti_sci_inta_irq_domain_free() - Free an IRQ from the IRQ domain
+ * @domain:     Domain to which the irqs belong
+ * @virq:       base linux virtual IRQ to be freed.
+ * @nr_irqs:    Number of continuous irqs to be freed
+ */
+static void ti_sci_inta_irq_domain_free(struct irq_domain *domain,
+                                        unsigned int virq, unsigned int nr_irqs)
+{
+        struct irq_data *data = irq_domain_get_irq_data(domain, virq);
+
+        irq_domain_reset_irq_data(data);
+}
+
+/**
+ * ti_sci_inta_irq_domain_alloc() - Allocate Interrupt aggregator IRQs
+ * @domain:     Point to the interrupt aggregator IRQ domain
+ * @virq:       Corresponding Linux virtual IRQ number
+ * @nr_irqs:    Continuous irqs to be allocated
+ * @data:       Pointer to firmware specifier
+ *
+ * No actual allocation happens here.
+ *
+ * Return 0 if all went well else appropriate error value.
+ */
+static int ti_sci_inta_irq_domain_alloc(struct irq_domain *domain,
+                                        unsigned int virq, unsigned int nr_irqs,
+                                        void *data)
+{
+        msi_alloc_info_t *arg = data;
+
+        irq_domain_set_info(domain, virq, arg->hwirq, &ti_sci_inta_irq_chip,
+                            NULL, handle_edge_irq, NULL, NULL);
+
+        return 0;
+}
+
+static const struct irq_domain_ops ti_sci_inta_irq_domain_ops = {
+        .free           = ti_sci_inta_irq_domain_free,
+        .alloc          = ti_sci_inta_irq_domain_alloc,
+};
+
+static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
+{
+        struct irq_domain *parent_domain, *domain;
+        struct device_node *parent_node, *node;
+        struct ti_sci_inta_irq_domain *inta;
+        struct device *dev = &pdev->dev;
+        struct resource *res;
+        int ret;
+
+        node = dev_of_node(dev);
+        parent_node = of_irq_find_parent(node);
+        if (!parent_node) {
+                dev_err(dev, "Failed to get IRQ parent node\n");
+                return -ENODEV;
+        }
+
+        parent_domain = irq_find_host(parent_node);
+        if (!parent_domain)
+                return -EPROBE_DEFER;
+
+        inta = devm_kzalloc(dev, sizeof(*inta), GFP_KERNEL);
+        if (!inta)
+                return -ENOMEM;
+
+        inta->pdev = pdev;
+        inta->sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
+        if (IS_ERR(inta->sci)) {
+                ret = PTR_ERR(inta->sci);
+                if (ret != -EPROBE_DEFER)
+                        dev_err(dev, "ti,sci read fail %d\n", ret);
+                inta->sci = NULL;
+                return ret;
+        }
+
+        ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &pdev->id);
+        if (ret) {
+                dev_err(dev, "missing 'ti,sci-dev-id' property\n");
+                return -EINVAL;
+        }
+
+        inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
+                                                 "ti,sci-rm-range-vint");
+        if (IS_ERR(inta->vint)) {
+                dev_err(dev, "VINT resource allocation failed\n");
+                return PTR_ERR(inta->vint);
+        }
+
+        inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
+                                                "ti,sci-rm-range-global-event");
+        if (IS_ERR(inta->global_event)) {
+                dev_err(dev, "Global event resource allocation failed\n");
+                return PTR_ERR(inta->global_event);
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        inta->base = devm_ioremap_resource(dev, res);
+        if (IS_ERR(inta->base))
+                return -ENODEV;
+
+        domain = irq_domain_add_linear(dev_of_node(dev),
+                                       ti_sci_get_num_resources(inta->vint),
+                                       &ti_sci_inta_irq_domain_ops, inta);
+        if (!domain) {
+                dev_err(dev, "Failed to allocate IRQ domain\n");
+                return -ENOMEM;
+        }
+
+        INIT_LIST_HEAD(&inta->vint_list);
+        mutex_init(&inta->vint_mutex);
+
+        return 0;
+}
+
+static const struct of_device_id ti_sci_inta_irq_domain_of_match[] = {
+        { .compatible = "ti,sci-inta", },
+        { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ti_sci_inta_irq_domain_of_match);
+
+static struct platform_driver ti_sci_inta_irq_domain_driver = {
+        .probe = ti_sci_inta_irq_domain_probe,
+        .driver = {
+                .name = "ti-sci-inta",
+                .of_match_table = ti_sci_inta_irq_domain_of_match,
+        },
+};
+module_platform_driver(ti_sci_inta_irq_domain_driver);
+
+MODULE_AUTHOR("Lokesh Vutla <lokeshvutla@ticom>");
+MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI protocol");
+MODULE_LICENSE("GPL v2");