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66 lines
2.2 KiB
66 lines
2.2 KiB
From 15753b6586710d788f36cfd5fbb98d0805b390ab Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Fri, 9 Nov 2012 13:31:51 +0100
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Subject: [PATCH 2/6] MIPS: lantiq: fix bootselect bits on XRX200 SoC
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The XRX200 SoC family has a different register layout for reading the boot
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selection bits.
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Signed-off-by: John Crispin <blogic@openwrt.org>
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Patchwork: http://patchwork.linux-mips.org/patch/4519
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---
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arch/mips/lantiq/xway/reset.c | 22 +++++++++++++++-------
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1 file changed, 15 insertions(+), 7 deletions(-)
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--- a/arch/mips/lantiq/xway/reset.c
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+++ b/arch/mips/lantiq/xway/reset.c
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@@ -34,11 +34,12 @@
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/* reset cause */
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#define RCU_STAT_SHIFT 26
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/* boot selection */
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-#define RCU_BOOT_SEL_SHIFT 26
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-#define RCU_BOOT_SEL_MASK 0x7
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+#define RCU_BOOT_SEL(x) ((x >> 18) & 0x7)
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+#define RCU_BOOT_SEL_XRX200(x) (((x >> 17) & 0xf) | ((x >> 8) & 0x10))
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/* remapped base addr of the reset control unit */
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static void __iomem *ltq_rcu_membase;
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+static struct device_node *ltq_rcu_np;
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/* This function is used by the watchdog driver */
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int ltq_reset_cause(void)
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@@ -52,7 +53,11 @@ EXPORT_SYMBOL_GPL(ltq_reset_cause);
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unsigned char ltq_boot_select(void)
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{
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u32 val = ltq_rcu_r32(RCU_RST_STAT);
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- return (val >> RCU_BOOT_SEL_SHIFT) & RCU_BOOT_SEL_MASK;
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+
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+ if (of_device_is_compatible(ltq_rcu_np, "lantiq,rcu-xrx200"))
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+ return RCU_BOOT_SEL_XRX200(val);
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+
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+ return RCU_BOOT_SEL(val);
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}
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/* reset a io domain for u micro seconds */
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@@ -85,14 +90,17 @@ static void ltq_machine_power_off(void)
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static int __init mips_reboot_setup(void)
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{
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struct resource res;
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- struct device_node *np =
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- of_find_compatible_node(NULL, NULL, "lantiq,rcu-xway");
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+
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+ ltq_rcu_np = of_find_compatible_node(NULL, NULL, "lantiq,rcu-xway");
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+ if (!ltq_rcu_np)
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+ ltq_rcu_np = of_find_compatible_node(NULL, NULL,
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+ "lantiq,rcu-xrx200");
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/* check if all the reset register range is available */
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- if (!np)
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+ if (!ltq_rcu_np)
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panic("Failed to load reset resources from devicetree");
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- if (of_address_to_resource(np, 0, &res))
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+ if (of_address_to_resource(ltq_rcu_np, 0, &res))
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panic("Failed to get rcu memory range");
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if (request_mem_region(res.start, resource_size(&res), res.name) < 0)
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