1 files changed, 62 insertions, 0 deletions
diff --git a/kernel/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/kernel/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
new file mode 100644
index 000000000..0b283d4d0
--- /dev/null
+++ b/kernel/arch/x86/platform/intel-mid/device_libs/platform_wdt.c
@@ -0,0 +1,62 @@
+/*
+ * platform_wdt.c: Watchdog platform library file
+ *
+ * (C) Copyright 2014 Intel Corporation
+ * Author: David Cohen <david.a.cohen@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/intel-mid_wdt.h>
+#include <asm/intel-mid.h>
+#include <asm/io_apic.h>
+
+#define TANGIER_EXT_TIMER0_MSI 15
+
+static struct platform_device wdt_dev = {
+	.name = "intel_mid_wdt",
+	.id = -1,
+};
+
+static int tangier_probe(struct platform_device *pdev)
+{
+	int gsi;
+	struct intel_mid_wdt_pdata *pdata = pdev->dev.platform_data;
+
+	if (!pdata)
+		return -EINVAL;
+
+	/* IOAPIC builds identity mapping between GSI and IRQ on MID */
+	gsi = pdata->irq;
+	if (mp_set_gsi_attr(gsi, 1, 0, cpu_to_node(0)) ||
+	    mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC) <= 0) {
+		dev_warn(&pdev->dev, "cannot find interrupt %d in ioapic\n",
+			 gsi);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct intel_mid_wdt_pdata tangier_pdata = {
+	.irq = TANGIER_EXT_TIMER0_MSI,
+	.probe = tangier_probe,
+};
+
+static int __init register_mid_wdt(void)
+{
+	if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER) {
+		wdt_dev.dev.platform_data = &tangier_pdata;
+		return platform_device_register(&wdt_dev);
+	}
+
+	return -ENODEV;
+}
+
+rootfs_initcall(register_mid_wdt);