platform/x86: serial-multi-instantiate: Add IRQ_RESOURCE_OPT for IRQ missing projects

The tas2781-hda supports multi-projects. In some projects, GpioInt() was
dropped due to no IRQ connection. See the example code below:

Device (SPKR)
{
    Name (_ADR, One)
    Name (_HID, "TXNW2781")
    Method (_CRS, 0, NotSerialized)
    {
        Name (RBUF, ResourceTemplate ()
        {
            I2cSerialBusV2 (0x0038, ...)
            I2cSerialBusV2 (0x0039, ...)
            // GpioInt (Edge, ...) { 0x0000 }
            //"GpioInt (...) {}" was commented out due to no IRQ connection.
        })
        Return (RBUF)
    }
}

But in smi_i2c_probe(), smi_spi_probe() (serial-multi-instantiate.c), if
looking for IRQ by smi_get_irq() fails, it will return an error, will not add
new device, and cause smi_probe() to fail:

[    2.356546] Serial bus multi instantiate pseudo device driver TXNW2781:00:
error -ENXIO: IRQ index 0 not found
[    2.356561] Serial bus multi instantiate pseudo device driver TXNW2781:00:
error -ENXIO: Error requesting irq at index 0

So, we need to add an exception case for these situations. BTW, this patch
will take effect on both I2C and SPI devices.

Signed-off-by: Baojun Xu <baojun.xu@ti.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20251126141434.11110-1-baojun.xu@ti.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
index db030b0f176a24b8c7c43f740a5d037da12b2cef..1a369334f9cb602407174c5c78da736e5bc79958 100644 (file)
--- a/drivers/platform/x86/serial-multi-instantiate.c
+++ b/drivers/platform/x86/serial-multi-instantiate.c
@@ -22,6 +22,7 @@
 #define IRQ_RESOURCE_GPIO      1
 #define IRQ_RESOURCE_APIC      2
 #define IRQ_RESOURCE_AUTO   3
+#define IRQ_RESOURCE_OPT       BIT(2)
 
 enum smi_bus_type {
        SMI_I2C,
@@ -64,6 +65,10 @@ static int smi_get_irq(struct platform_device *pdev, struct acpi_device *adev,
                        dev_dbg(&pdev->dev, "Using platform irq\n");
                        break;
                }
+               if (inst->flags & IRQ_RESOURCE_OPT) {
+                       dev_dbg(&pdev->dev, "No irq\n");
+                       return 0;
+               }
                break;
        case IRQ_RESOURCE_GPIO:
                ret = acpi_dev_gpio_irq_get(adev, inst->irq_idx);
@@ -386,10 +391,10 @@ static const struct smi_node cs35l57_hda = {
 
 static const struct smi_node tas2781_hda = {
        .instances = {
-               { "tas2781-hda", IRQ_RESOURCE_AUTO, 0 },
-               { "tas2781-hda", IRQ_RESOURCE_AUTO, 0 },
-               { "tas2781-hda", IRQ_RESOURCE_AUTO, 0 },
-               { "tas2781-hda", IRQ_RESOURCE_AUTO, 0 },
+               { "tas2781-hda", IRQ_RESOURCE_AUTO | IRQ_RESOURCE_OPT, 0 },
+               { "tas2781-hda", IRQ_RESOURCE_AUTO | IRQ_RESOURCE_OPT, 0 },
+               { "tas2781-hda", IRQ_RESOURCE_AUTO | IRQ_RESOURCE_OPT, 0 },
+               { "tas2781-hda", IRQ_RESOURCE_AUTO | IRQ_RESOURCE_OPT, 0 },
                {}
        },
        .bus_type = SMI_AUTO_DETECT,