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authorUwe Kleine-König <Uwe.Kleine-Koenig@digi.com>2008-02-15 08:41:06 +0100
committerUwe Kleine-König <Uwe.Kleine-Koenig@digi.com>2008-03-31 08:17:01 +0200
commit724ce5ee15ff4c4f3035110b683b990a3b33c832 (patch)
tree7b07d25bf64d2e6dad4495c847d1b24d9d5dca43 /arch/arm/mach-ns9xxx/processor-ns9360.c
parent3a581349b961f225893103a0fbbd065a831c5184 (diff)
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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>
Diffstat (limited to 'arch/arm/mach-ns9xxx/processor-ns9360.c')
-rw-r--r--arch/arm/mach-ns9xxx/processor-ns9360.c54
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 0000000..2bee0b7
--- /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));
+}