From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/arm/mach-nspire/Kconfig  | 13 +++++++++++++
 arch/arm/mach-nspire/Makefile |  2 ++
 arch/arm/mach-nspire/mmio.h   | 16 ++++++++++++++++
 arch/arm/mach-nspire/nspire.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+)
 create mode 100644 arch/arm/mach-nspire/Kconfig
 create mode 100644 arch/arm/mach-nspire/Makefile
 create mode 100644 arch/arm/mach-nspire/mmio.h
 create mode 100644 arch/arm/mach-nspire/nspire.c

(limited to 'arch/arm/mach-nspire')

diff --git a/arch/arm/mach-nspire/Kconfig b/arch/arm/mach-nspire/Kconfig
new file mode 100644
index 000000000..b7a387187
--- /dev/null
+++ b/arch/arm/mach-nspire/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config ARCH_NSPIRE
+	bool "TI-NSPIRE based"
+	depends on ARCH_MULTI_V4T
+	depends on CPU_LITTLE_ENDIAN
+	select CPU_ARM926T
+	select GENERIC_IRQ_CHIP
+	select ARM_AMBA
+	select ARM_VIC
+	select ARM_TIMER_SP804
+	select NSPIRE_TIMER
+	help
+	  This enables support for systems using the TI-NSPIRE CPU
diff --git a/arch/arm/mach-nspire/Makefile b/arch/arm/mach-nspire/Makefile
new file mode 100644
index 000000000..4716b9b9a
--- /dev/null
+++ b/arch/arm/mach-nspire/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y				+= nspire.o
diff --git a/arch/arm/mach-nspire/mmio.h b/arch/arm/mach-nspire/mmio.h
new file mode 100644
index 000000000..48e32f13f
--- /dev/null
+++ b/arch/arm/mach-nspire/mmio.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *	linux/arch/arm/mach-nspire/mmio.h
+ *
+ *	Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ */
+
+#define NSPIRE_MISC_PHYS_BASE		0x900A0000
+#define NSPIRE_MISC_HWRESET		0x08
+
+#define NSPIRE_PWR_PHYS_BASE		0x900B0000
+#define NSPIRE_PWR_VIRT_BASE		0xFEEB0000
+#define NSPIRE_PWR_BUS_DISABLE1		0x18
+#define NSPIRE_PWR_BUS_DISABLE2		0x20
+
+#define NSPIRE_LCD_PHYS_BASE		0xC0000000
diff --git a/arch/arm/mach-nspire/nspire.c b/arch/arm/mach-nspire/nspire.c
new file mode 100644
index 000000000..2d4abb028
--- /dev/null
+++ b/arch/arm/mach-nspire/nspire.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *	linux/arch/arm/mach-nspire/nspire.c
+ *
+ *	Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ */
+#include <linux/init.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-vic.h>
+#include <linux/clkdev.h>
+#include <linux/amba/bus.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+
+#include "mmio.h"
+
+static const char *const nspire_dt_match[] __initconst = {
+	"ti,nspire",
+	"ti,nspire-cx",
+	"ti,nspire-tp",
+	"ti,nspire-clp",
+	NULL,
+};
+
+static void nspire_restart(enum reboot_mode mode, const char *cmd)
+{
+	void __iomem *base = ioremap(NSPIRE_MISC_PHYS_BASE, SZ_4K);
+	if (!base)
+		return;
+
+	writel(2, base + NSPIRE_MISC_HWRESET);
+}
+
+DT_MACHINE_START(NSPIRE, "TI-NSPIRE")
+	.dt_compat	= nspire_dt_match,
+	.restart	= nspire_restart,
+MACHINE_END
-- 
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