OF: MIPS: lantiq: implement OF support
Activate USE_OF, add a sample DTS file and convert the core soc code to OF.
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3803/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/lantiq/xway/reset.c b/arch/mips/lantiq/xway/reset.c
index 3327211..22c55f7 100644
--- a/arch/mips/lantiq/xway/reset.c
+++ b/arch/mips/lantiq/xway/reset.c
@@ -37,13 +37,6 @@
#define RCU_BOOT_SEL_SHIFT 26
#define RCU_BOOT_SEL_MASK 0x7
-static struct resource ltq_rcu_resource = {
- .name = "rcu",
- .start = LTQ_RCU_BASE_ADDR,
- .end = LTQ_RCU_BASE_ADDR + LTQ_RCU_SIZE - 1,
- .flags = IORESOURCE_MEM,
-};
-
/* remapped base addr of the reset control unit */
static void __iomem *ltq_rcu_membase;
@@ -91,17 +84,21 @@
static int __init mips_reboot_setup(void)
{
- /* insert and request the memory region */
- if (insert_resource(&iomem_resource, <q_rcu_resource) < 0)
- panic("Failed to insert rcu memory");
+ struct resource res;
+ struct device_node *np =
+ of_find_compatible_node(NULL, NULL, "lantiq,rcu-xway");
- if (request_mem_region(ltq_rcu_resource.start,
- resource_size(<q_rcu_resource), "rcu") < 0)
- panic("Failed to request rcu memory");
+ /* check if all the reset register range is available */
+ if (!np)
+ panic("Failed to load reset resources from devicetree");
- /* remap rcu register range */
- ltq_rcu_membase = ioremap_nocache(ltq_rcu_resource.start,
- resource_size(<q_rcu_resource));
+ if (of_address_to_resource(np, 0, &res))
+ panic("Failed to get rcu memory range");
+
+ if (request_mem_region(res.start, resource_size(&res), res.name) < 0)
+ pr_err("Failed to request rcu memory");
+
+ ltq_rcu_membase = ioremap_nocache(res.start, resource_size(&res));
if (!ltq_rcu_membase)
panic("Failed to remap core memory");