linux-kernel - [PATCH v1 11/15] platform/x86: i2c-multi-instantiate: Introduce IOAPIC IRQ support

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Date:   Tue, 20 Nov 2018 17:59:20 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Darren Hart <dvhart@...radead.org>,
        platform-driver-x86@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        linux-acpi@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-i2c@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 11/15] platform/x86: i2c-multi-instantiate: Introduce IOAPIC IRQ support

If ACPI table provides an Interrupt() resource we may consider to use it
instead of GpioInt() one.

Here we leave an error condition, when getting IRQ resource, to the driver
to decide how to proceed, because some drivers may consider IRQ resource
optional.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/platform/x86/i2c-multi-instantiate.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c
index 336ef28e072d..3334fafb4d8c 100644
--- a/drivers/platform/x86/i2c-multi-instantiate.c
+++ b/drivers/platform/x86/i2c-multi-instantiate.c
@@ -18,6 +18,7 @@
 #define IRQ_RESOURCE_TYPE	GENMASK(1, 0)
 #define IRQ_RESOURCE_NONE	0
 #define IRQ_RESOURCE_GPIO	1
+#define IRQ_RESOURCE_APIC	2
 
 struct i2c_inst_data {
 	const char *type;
@@ -104,6 +105,14 @@ static int i2c_multi_inst_probe(struct platform_device *pdev)
 			}
 			board_info.irq = ret;
 			break;
+		case IRQ_RESOURCE_APIC:
+			ret = platform_get_irq(pdev, inst_data[i].irq_idx);
+			if (ret < 0) {
+				dev_dbg(dev, "Error requesting irq at index %d: %d\n",
+					inst_data[i].irq_idx, ret);
+			}
+			board_info.irq = ret;
+			break;
 		default:
 			board_info.irq = 0;
 			break;
-- 
2.19.1