On 01/18/2017 08:55 PM, Hanjun Guo wrote:
From: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
With the preparation of platform msi support and interrupt producer
in DSDT, we can add mbigen ACPI support now.
We are using Interrupt resource type in _CRS methd to indicate number
of irq pins instead of num_pins in DT to avoid _DSD usage in this case.
For mbigen,
Device(MBI0) {
Name(_HID, "HISI0152")
Name(_UID, Zero)
Name(_CRS, ResourceTemplate() {
Memory32Fixed(ReadWrite, 0xa0080000, 0x10000)
Interrupt(ResourceProducer,...) {12,14,....}
})
}
For devices,
Device(COM0) {
Name(_HID, "ACPIIDxx")
Name(_UID, Zero)
Name(_CRS, ResourceTemplate() {
Memory32Fixed(ReadWrite, 0xb0030000, 0x10000)
Interrupt(ResourceConsumer,..., "\_SB.MBI0") {12}
})
}
With the help of platform msi and interrupt producer, then devices
will get the virq from mbigen's irqdomain.
Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Ma Jun <majun258@xxxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
drivers/irqchip/irq-mbigen.c | 70 ++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 67 insertions(+), 3 deletions(-)
diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
index 4e11da5..64f8561 100644
--- a/drivers/irqchip/irq-mbigen.c
+++ b/drivers/irqchip/irq-mbigen.c
@@ -16,6 +16,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/irqchip.h>
#include <linux/module.h>
@@ -180,7 +181,7 @@ static int mbigen_domain_translate(struct irq_domain *d,
unsigned long *hwirq,
unsigned int *type)
{
- if (is_of_node(fwspec->fwnode)) {
+ if (is_of_node(fwspec->fwnode) || is_acpi_device_node(fwspec->fwnode)) {
if (fwspec->param_count != 2)
return -EINVAL;
@@ -271,6 +272,54 @@ static int mbigen_of_create_domain(struct platform_device *pdev,
return 0;
}
+#ifdef CONFIG_ACPI
+static acpi_status mbigen_acpi_process_resource(struct acpi_resource *ares,
+ void *context)
+{
+ struct acpi_resource_extended_irq *ext_irq;
+ u32 *num_irqs = context;
+
+ switch (ares->type) {
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ ext_irq = &ares->data.extended_irq;
+ *num_irqs += ext_irq->interrupt_count;
+ break;
+ default:
+ break;
+ }
+
+ return AE_OK;
+}
+
+static int mbigen_acpi_create_domain(struct platform_device *pdev,
+ struct mbigen_device *mgn_chip)
+{
+ struct irq_domain *domain;
+ u32 num_msis = 0;
+ acpi_status status;
+
+ status = acpi_walk_resources(ACPI_HANDLE(&pdev->dev), METHOD_NAME__CRS,
+ mbigen_acpi_process_resource, &num_msis);
+ if (ACPI_FAILURE(status) || num_msis == 0)
There are some trailing white spaces in this patch, I will send a
updated one if no more comments.
Thanks
Hanjun
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