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