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-rw-r--r--arch/arm/mach-gemini/Kconfig20
-rw-r--r--arch/arm/mach-gemini/Makefile3
-rw-r--r--arch/arm/mach-gemini/board-dt.c63
3 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/mach-gemini/Kconfig b/arch/arm/mach-gemini/Kconfig
new file mode 100644
index 000000000..f436a2009
--- /dev/null
+++ b/arch/arm/mach-gemini/Kconfig
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig ARCH_GEMINI
+ bool "Cortina Systems Gemini"
+ depends on ARCH_MULTI_V4
+ depends on CPU_LITTLE_ENDIAN
+ select ARCH_HAS_RESET_CONTROLLER
+ select ARM_AMBA
+ select ARM_APPENDED_DTB # Old Redboot bootloaders deployed
+ select COMMON_CLK_GEMINI
+ select FARADAY_FTINTC010
+ select FTTMR010_TIMER
+ select GPIO_FTGPIO010
+ select GPIOLIB
+ select PINCTRL
+ select PINCTRL_GEMINI
+ select POWER_RESET
+ select POWER_RESET_GEMINI_POWEROFF
+ select POWER_RESET_SYSCON
+ help
+ Support for the Cortina Systems Gemini family SoCs
diff --git a/arch/arm/mach-gemini/Makefile b/arch/arm/mach-gemini/Makefile
new file mode 100644
index 000000000..997a0be84
--- /dev/null
+++ b/arch/arm/mach-gemini/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Makefile for Cortina systems Gemini
+obj-y := board-dt.o
diff --git a/arch/arm/mach-gemini/board-dt.c b/arch/arm/mach-gemini/board-dt.c
new file mode 100644
index 000000000..de0afcc8d
--- /dev/null
+++ b/arch/arm/mach-gemini/board-dt.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Gemini Device Tree boot support
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/system_misc.h>
+#include <asm/proc-fns.h>
+
+#ifdef CONFIG_DEBUG_GEMINI
+/* This is needed for LL-debug/earlyprintk/debug-macro.S */
+static struct map_desc gemini_io_desc[] __initdata = {
+ {
+ .virtual = CONFIG_DEBUG_UART_VIRT,
+ .pfn = __phys_to_pfn(CONFIG_DEBUG_UART_PHYS),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+};
+
+static void __init gemini_map_io(void)
+{
+ iotable_init(gemini_io_desc, ARRAY_SIZE(gemini_io_desc));
+}
+#else
+#define gemini_map_io NULL
+#endif
+
+static void gemini_idle(void)
+{
+ /*
+ * Because of broken hardware we have to enable interrupts or the CPU
+ * will never wakeup... Acctualy it is not very good to enable
+ * interrupts first since scheduler can miss a tick, but there is
+ * no other way around this. Platforms that needs it for power saving
+ * should enable it in init code, since by default it is
+ * disabled.
+ */
+
+ /* FIXME: Enabling interrupts here is racy! */
+ local_irq_enable();
+ cpu_do_idle();
+}
+
+static void __init gemini_init_machine(void)
+{
+ arm_pm_idle = gemini_idle;
+}
+
+static const char *gemini_board_compat[] = {
+ "cortina,gemini",
+ NULL,
+};
+
+DT_MACHINE_START(GEMINI_DT, "Gemini (Device Tree)")
+ .map_io = gemini_map_io,
+ .init_machine = gemini_init_machine,
+ .dt_compat = gemini_board_compat,
+MACHINE_END