v4.19.13 snapshot.
diff --git a/arch/arm/mach-ks8695/irq.c b/arch/arm/mach-ks8695/irq.c
new file mode 100644
index 0000000..31439f2
--- /dev/null
+++ b/arch/arm/mach-ks8695/irq.c
@@ -0,0 +1,177 @@
+/*
+ * arch/arm/mach-ks8695/irq.c
+ *
+ * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
+ * Copyright (C) 2006 Simtec Electronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+
+static void ks8695_irq_mask(struct irq_data *d)
+{
+ unsigned long inten;
+
+ inten = __raw_readl(KS8695_IRQ_VA + KS8695_INTEN);
+ inten &= ~(1 << d->irq);
+
+ __raw_writel(inten, KS8695_IRQ_VA + KS8695_INTEN);
+}
+
+static void ks8695_irq_unmask(struct irq_data *d)
+{
+ unsigned long inten;
+
+ inten = __raw_readl(KS8695_IRQ_VA + KS8695_INTEN);
+ inten |= (1 << d->irq);
+
+ __raw_writel(inten, KS8695_IRQ_VA + KS8695_INTEN);
+}
+
+static void ks8695_irq_ack(struct irq_data *d)
+{
+ __raw_writel((1 << d->irq), KS8695_IRQ_VA + KS8695_INTST);
+}
+
+
+static struct irq_chip ks8695_irq_level_chip;
+static struct irq_chip ks8695_irq_edge_chip;
+
+
+static int ks8695_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ unsigned long ctrl, mode;
+ unsigned short level_triggered = 0;
+
+ ctrl = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);
+
+ switch (type) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ mode = IOPC_TM_HIGH;
+ level_triggered = 1;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ mode = IOPC_TM_LOW;
+ level_triggered = 1;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ mode = IOPC_TM_RISING;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ mode = IOPC_TM_FALLING;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ mode = IOPC_TM_EDGE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (d->irq) {
+ case KS8695_IRQ_EXTERN0:
+ ctrl &= ~IOPC_IOEINT0TM;
+ ctrl |= IOPC_IOEINT0_MODE(mode);
+ break;
+ case KS8695_IRQ_EXTERN1:
+ ctrl &= ~IOPC_IOEINT1TM;
+ ctrl |= IOPC_IOEINT1_MODE(mode);
+ break;
+ case KS8695_IRQ_EXTERN2:
+ ctrl &= ~IOPC_IOEINT2TM;
+ ctrl |= IOPC_IOEINT2_MODE(mode);
+ break;
+ case KS8695_IRQ_EXTERN3:
+ ctrl &= ~IOPC_IOEINT3TM;
+ ctrl |= IOPC_IOEINT3_MODE(mode);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (level_triggered) {
+ irq_set_chip_and_handler(d->irq, &ks8695_irq_level_chip,
+ handle_level_irq);
+ }
+ else {
+ irq_set_chip_and_handler(d->irq, &ks8695_irq_edge_chip,
+ handle_edge_irq);
+ }
+
+ __raw_writel(ctrl, KS8695_GPIO_VA + KS8695_IOPC);
+ return 0;
+}
+
+static struct irq_chip ks8695_irq_level_chip = {
+ .irq_ack = ks8695_irq_mask,
+ .irq_mask = ks8695_irq_mask,
+ .irq_unmask = ks8695_irq_unmask,
+ .irq_set_type = ks8695_irq_set_type,
+};
+
+static struct irq_chip ks8695_irq_edge_chip = {
+ .irq_ack = ks8695_irq_ack,
+ .irq_mask = ks8695_irq_mask,
+ .irq_unmask = ks8695_irq_unmask,
+ .irq_set_type = ks8695_irq_set_type,
+};
+
+void __init ks8695_init_irq(void)
+{
+ unsigned int irq;
+
+ /* Disable all interrupts initially */
+ __raw_writel(0, KS8695_IRQ_VA + KS8695_INTMC);
+ __raw_writel(0, KS8695_IRQ_VA + KS8695_INTEN);
+
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ switch (irq) {
+ /* Level-triggered interrupts */
+ case KS8695_IRQ_BUS_ERROR:
+ case KS8695_IRQ_UART_MODEM_STATUS:
+ case KS8695_IRQ_UART_LINE_STATUS:
+ case KS8695_IRQ_UART_RX:
+ case KS8695_IRQ_COMM_TX:
+ case KS8695_IRQ_COMM_RX:
+ irq_set_chip_and_handler(irq,
+ &ks8695_irq_level_chip,
+ handle_level_irq);
+ break;
+
+ /* Edge-triggered interrupts */
+ default:
+ /* clear pending bit */
+ ks8695_irq_ack(irq_get_irq_data(irq));
+ irq_set_chip_and_handler(irq,
+ &ks8695_irq_edge_chip,
+ handle_edge_irq);
+ }
+
+ irq_clear_status_flags(irq, IRQ_NOREQUEST);
+ }
+}