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OpenCloudOS-Kernel/drivers/irqchip/irq-ti-sci-inta.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Texas Instruments' K3 Interrupt Aggregator irqchip driver
*
* Copyright (C) 2018-2019 Texas Instruments Incorporated - https://www.ti.com/
* Lokesh Vutla <lokeshvutla@ti.com>
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.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_inta_msi.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 TO_HWIRQ(dev, index) ((((dev) & TI_SCI_DEV_ID_MASK) << \
TI_SCI_DEV_ID_SHIFT) | \
((index) & 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
#define VINT_STATUS_MASKED_OFFSET 0x20
/**
* 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.
* @ti_sci_id: TI-SCI device identifier
* @unmapped_cnt: Number of @unmapped_dev_ids entries
* @unmapped_dev_ids: Pointer to an array of TI-SCI device identifiers of
* unmapped event sources.
* Unmapped Events are not part of the Global Event Map and
* they are converted to Global event within INTA to be
* received by the same INTA to generate an interrupt.
* In case an interrupt request comes for a device which is
* generating Unmapped Event, we must use the INTA's TI-SCI
* device identifier in place of the source device
* identifier to let sysfw know where it has to program the
* Global Event number.
*/
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;
u32 ti_sci_id;
int unmapped_cnt;
u16 *unmapped_dev_ids;
};
#define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
events[i])
static u16 ti_sci_inta_get_dev_id(struct ti_sci_inta_irq_domain *inta, u32 hwirq)
{
u16 dev_id = HWIRQ_TO_DEVID(hwirq);
int i;
if (inta->unmapped_cnt == 0)
return dev_id;
/*
* For devices sending Unmapped Events we must use the INTA's TI-SCI
* device identifier number to be able to convert it to a Global Event
* and map it to an interrupt.
*/
for (i = 0; i < inta->unmapped_cnt; i++) {
if (dev_id == inta->unmapped_dev_ids[i]) {
dev_id = inta->ti_sci_id;
break;
}
}
return dev_id;
}
/**
* 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_MASKED_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_xlate_irq() - Translate hwirq to parent's hwirq.
* @inta: IRQ domain corresponding to Interrupt Aggregator
* @irq: Hardware irq corresponding to the above irq domain
*
* Return parent irq number if translation is available else -ENOENT.
*/
static int ti_sci_inta_xlate_irq(struct ti_sci_inta_irq_domain *inta,
u16 vint_id)
{
struct device_node *np = dev_of_node(&inta->pdev->dev);
u32 base, parent_base, size;
const __be32 *range;
int len;
range = of_get_property(np, "ti,interrupt-ranges", &len);
if (!range)
return vint_id;
for (len /= sizeof(*range); len >= 3; len -= 3) {
base = be32_to_cpu(*range++);
parent_base = be32_to_cpu(*range++);
size = be32_to_cpu(*range++);
if (base <= vint_id && vint_id < base + size)
return vint_id - base + parent_base;
}
return -ENOENT;
}
/**
* 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;
struct device_node *parent_node;
unsigned int parent_virq;
int p_hwirq, ret;
u16 vint_id;
vint_id = ti_sci_get_free_resource(inta->vint);
if (vint_id == TI_SCI_RESOURCE_NULL)
return ERR_PTR(-EINVAL);
p_hwirq = ti_sci_inta_xlate_irq(inta, vint_id);
if (p_hwirq < 0) {
ret = p_hwirq;
goto free_vint;
}
vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
if (!vint_desc) {
ret = -ENOMEM;
goto free_vint;
}
vint_desc->domain = domain;
vint_desc->vint_id = vint_id;
INIT_LIST_HEAD(&vint_desc->list);
parent_node = of_irq_find_parent(dev_of_node(&inta->pdev->dev));
parent_fwspec.fwnode = of_node_to_fwnode(parent_node);
if (of_device_is_compatible(parent_node, "arm,gic-v3")) {
/* Parent is GIC */
parent_fwspec.param_count = 3;
parent_fwspec.param[0] = 0;
parent_fwspec.param[1] = p_hwirq - 32;
parent_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH;
} else {
/* Parent is Interrupt Router */
parent_fwspec.param_count = 1;
parent_fwspec.param[0] = p_hwirq;
}
parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
if (parent_virq == 0) {
dev_err(&inta->pdev->dev, "Parent IRQ allocation failed\n");
ret = -EINVAL;
goto free_vint_desc;
}
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;
free_vint_desc:
kfree(vint_desc);
free_vint:
ti_sci_release_resource(inta->vint, vint_id);
return ERR_PTR(ret);
}
/**
* 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 = ti_sci_inta_get_dev_id(inta, 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->ti_sci_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)) {
event_desc = ERR_CAST(vint_desc);
goto unlock;
}
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);
unlock:
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;
u16 dev_id;
vint_desc = to_vint_desc(event_desc, event_desc->vint_bit);
inta = vint_desc->domain->host_data;
dev_id = ti_sci_inta_get_dev_id(inta, hwirq);
/* free event irq */
mutex_lock(&inta->vint_mutex);
inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
dev_id, HWIRQ_TO_IRQID(hwirq),
inta->ti_sci_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;
}
}
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 struct irq_chip ti_sci_inta_msi_irq_chip = {
.name = "MSI-INTA",
.flags = IRQCHIP_SUPPORTS_LEVEL_MSI,
};
static void ti_sci_inta_msi_set_desc(msi_alloc_info_t *arg,
struct msi_desc *desc)
{
struct platform_device *pdev = to_platform_device(desc->dev);
arg->desc = desc;
arg->hwirq = TO_HWIRQ(pdev->id, desc->inta.dev_index);
}
static struct msi_domain_ops ti_sci_inta_msi_ops = {
.set_desc = ti_sci_inta_msi_set_desc,
};
static struct msi_domain_info ti_sci_inta_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_LEVEL_CAPABLE),
.ops = &ti_sci_inta_msi_ops,
.chip = &ti_sci_inta_msi_irq_chip,
};
static int ti_sci_inta_get_unmapped_sources(struct ti_sci_inta_irq_domain *inta)
{
struct device *dev = &inta->pdev->dev;
struct device_node *node = dev_of_node(dev);
struct of_phandle_iterator it;
int count, err, ret, i;
count = of_count_phandle_with_args(node, "ti,unmapped-event-sources", NULL);
if (count <= 0)
return 0;
inta->unmapped_dev_ids = devm_kcalloc(dev, count,
sizeof(*inta->unmapped_dev_ids),
GFP_KERNEL);
if (!inta->unmapped_dev_ids)
return -ENOMEM;
i = 0;
of_for_each_phandle(&it, err, node, "ti,unmapped-event-sources", NULL, 0) {
u32 dev_id;
ret = of_property_read_u32(it.node, "ti,sci-dev-id", &dev_id);
if (ret) {
dev_err(dev, "ti,sci-dev-id read failure for %pOFf\n", it.node);
of_node_put(it.node);
return ret;
}
inta->unmapped_dev_ids[i++] = dev_id;
}
inta->unmapped_cnt = count;
return 0;
}
static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
{
struct irq_domain *parent_domain, *domain, *msi_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))
return dev_err_probe(dev, PTR_ERR(inta->sci),
"ti,sci read fail\n");
ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &inta->ti_sci_id);
if (ret) {
dev_err(dev, "missing 'ti,sci-dev-id' property\n");
return -EINVAL;
}
inta->vint = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,
TI_SCI_RESASG_SUBTYPE_IA_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_resource(inta->sci, dev, inta->ti_sci_id,
TI_SCI_RESASG_SUBTYPE_GLOBAL_EVENT_SEVT);
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 PTR_ERR(inta->base);
ret = ti_sci_inta_get_unmapped_sources(inta);
if (ret)
return ret;
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;
}
msi_domain = ti_sci_inta_msi_create_irq_domain(of_node_to_fwnode(node),
&ti_sci_inta_msi_domain_info,
domain);
if (!msi_domain) {
irq_domain_remove(domain);
dev_err(dev, "Failed to allocate msi domain\n");
return -ENOMEM;
}
INIT_LIST_HEAD(&inta->vint_list);
mutex_init(&inta->vint_mutex);
dev_info(dev, "Interrupt Aggregator domain %d created\n", inta->ti_sci_id);
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@ti.com>");
MODULE_DESCRIPTION("K3 Interrupt Aggregator driver over TI SCI protocol");
MODULE_LICENSE("GPL v2");
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