ns9xxx: prepare for adding support for Digi ns921x processors

The hardware team changed some things that were taken as being common to
all ns9xxx processors up to now.

This patch addresses:

- irqs: s/IRQ_/IRQ_NS9360_/

- system module registers: some registers are still general, their
  definition lives now in include/asm-arm/arch-ns9xxx/regs-sys-common.h.
  The ns9360 specific ones are in .../regs-sys-ns9360.h
  As a result ns9360_systemclock cannot be static inline any more as its
  definition needs regs-sys-ns9360.h.  This becomes a real problem when
  adding support for ns9215 as this will need regs-sys-ns9215.h and
  including both files will not work.  For the same reason
  ns9360_reset() is now non-inline and gpio functions live in their own
  file.

- register mapping: s/ns9xxx_map_io/ns9360_map_io/

- timer registers:  move time.c to time-ns9360.c;
  s/ns9xxx_timer/ns9360_timer/

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/arm/mach-ns9xxx/processor-ns9360.c b/arch/arm/mach-ns9xxx/processor-ns9360.c
new file mode 100644
index 000000000000..2bee0b7fccbb
--- /dev/null
+++ b/arch/arm/mach-ns9xxx/processor-ns9360.c
@@ -0,0 +1,54 @@
+/*
+ * arch/arm/mach-ns9xxx/processor-ns9360.c
+ *
+ * Copyright (C) 2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <asm/page.h>
+#include <asm/mach/map.h>
+#include <asm/arch-ns9xxx/processor-ns9360.h>
+#include <asm/arch-ns9xxx/regs-sys-ns9360.h>
+
+void ns9360_reset(char mode)
+{
+	u32 reg;
+
+	reg = __raw_readl(SYS_PLL) >> 16;
+	REGSET(reg, SYS_PLL, SWC, YES);
+	__raw_writel(reg, SYS_PLL);
+}
+
+#define CRYSTAL 29491200 /* Hz */
+unsigned long ns9360_systemclock(void)
+{
+	u32 pll = __raw_readl(SYS_PLL);
+	return CRYSTAL * (REGGETIM(pll, SYS_PLL, ND) + 1)
+		>> REGGETIM(pll, SYS_PLL, FS);
+}
+
+static struct map_desc ns9360_io_desc[] __initdata = {
+	{ /* BBus */
+		.virtual = io_p2v(0x90000000),
+		.pfn = __phys_to_pfn(0x90000000),
+		.length = 0x00700000,
+		.type = MT_DEVICE,
+	}, { /* AHB */
+		.virtual = io_p2v(0xa0100000),
+		.pfn = __phys_to_pfn(0xa0100000),
+		.length = 0x00900000,
+		.type = MT_DEVICE,
+	},
+};
+
+void __init ns9360_map_io(void)
+{
+	iotable_init(ns9360_io_desc, ARRAY_SIZE(ns9360_io_desc));
+}