Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/arm/mach-dove/irq.c b/arch/arm/mach-dove/irq.c
new file mode 100644
index 000000000..d6627c1f7
--- /dev/null
+++ b/arch/arm/mach-dove/irq.c
@@ -0,0 +1,81 @@
+/*
+ * arch/arm/mach-dove/irq.c
+ *
+ * Dove IRQ handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <asm/exception.h>
+#include <plat/irq.h>
+#include <mach/bridge-regs.h>
+#include <plat/orion-gpio.h>
+#include "common.h"
+
+static int __initdata gpio0_irqs[4] = {
+	IRQ_DOVE_GPIO_0_7,
+	IRQ_DOVE_GPIO_8_15,
+	IRQ_DOVE_GPIO_16_23,
+	IRQ_DOVE_GPIO_24_31,
+};
+
+static int __initdata gpio1_irqs[4] = {
+	IRQ_DOVE_HIGH_GPIO,
+	0,
+	0,
+	0,
+};
+
+static int __initdata gpio2_irqs[4] = {
+	0,
+	0,
+	0,
+	0,
+};
+
+static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
+
+static asmlinkage void
+__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
+{
+	u32 stat;
+
+	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
+	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
+	if (stat) {
+		unsigned int hwirq = 1 + __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
+	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
+	if (stat) {
+		unsigned int hwirq = 33 + __fls(stat);
+		handle_IRQ(hwirq, regs);
+		return;
+	}
+}
+
+void __init dove_init_irq(void)
+{
+	orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
+	orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
+
+	set_handle_irq(dove_legacy_handle_irq);
+
+	/*
+	 * Initialize gpiolib for GPIOs 0-71.
+	 */
+	orion_gpio_init(NULL, 0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
+			IRQ_DOVE_GPIO_START, gpio0_irqs);
+
+	orion_gpio_init(NULL, 32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
+			IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
+
+	orion_gpio_init(NULL, 64, 8, DOVE_GPIO2_VIRT_BASE, 0,
+			IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
+}