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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/mach-dove/irq.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-dove/irq.c')
-rw-r--r--arch/arm/mach-dove/irq.c81
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 0000000000..027a8f87bc
--- /dev/null
+++ b/arch/arm/mach-dove/irq.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * arch/arm/mach-dove/irq.c
+ *
+ * Dove IRQ handling.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <asm/exception.h>
+
+#include <plat/irq.h>
+#include <plat/orion-gpio.h>
+
+#include "pm.h"
+#include "bridge-regs.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(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
+ IRQ_DOVE_GPIO_START, gpio0_irqs);
+
+ orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
+ IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
+
+ orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
+ IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
+}