1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/omap_hsi/hsi_driver_gpio.c b/drivers/omap_hsi/hsi_driver_gpio.c
new file mode 100644
index 0000000..4c8810b
--- /dev/null
+++ b/drivers/omap_hsi/hsi_driver_gpio.c
@@ -0,0 +1,75 @@
+/*
+ * hsi_driver_gpio.c
+ *
+ * Implements HSI GPIO related functionality. (i.e: wake lines management)
+ *
+ * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved.
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author: Carlos Chinea <carlos.chinea@nokia.com>
+ * Author: Sebastien JAN <s-jan@ti.com>
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <linux/gpio.h>
+#include "hsi_driver.h"
+
+static void do_hsi_cawake_tasklet(unsigned long hsi_p)
+{
+	struct hsi_port *port = (struct hsi_port *)hsi_p;
+	struct hsi_dev *hsi_ctrl = port->hsi_controller;
+
+	spin_lock(&hsi_ctrl->lock);
+	hsi_clocks_enable(hsi_ctrl->dev, __func__);
+	port->in_cawake_tasklet = true;
+
+	port->cawake_status = hsi_get_cawake(port);
+	hsi_do_cawake_process(port);
+
+	port->in_cawake_tasklet = false;
+	hsi_clocks_disable(hsi_ctrl->dev, __func__);
+	spin_unlock(&hsi_ctrl->lock);
+}
+
+static irqreturn_t hsi_cawake_isr(int irq, void *hsi_p)
+{
+	struct hsi_port *port = hsi_p;
+
+	tasklet_hi_schedule(&port->cawake_tasklet);
+
+	return IRQ_HANDLED;
+}
+
+int __init hsi_cawake_init(struct hsi_port *port, const char *irq_name)
+{
+	tasklet_init(&port->cawake_tasklet, do_hsi_cawake_tasklet,
+		     (unsigned long)port);
+
+	if (request_irq(port->cawake_gpio_irq, hsi_cawake_isr,
+			IRQF_DISABLED | IRQF_TRIGGER_RISING |
+			IRQF_TRIGGER_FALLING, irq_name, port) < 0) {
+		dev_err(port->hsi_controller->dev,
+			"FAILED to request %s GPIO IRQ %d on port %d\n",
+			irq_name, port->cawake_gpio_irq, port->port_number);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+void hsi_cawake_exit(struct hsi_port *port)
+{
+	if (port->cawake_gpio < 0)
+		return;	/* Nothing to do (case SSI with GPIO or */
+			/* HSI with IO ring wakeup */
+
+	tasklet_kill(&port->cawake_tasklet);
+	free_irq(port->cawake_gpio_irq, port);
+}