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MIPS: CPC: Map registers using DT in mips_cpc_default_phys_base()
Reading mips_cpc_base value from the DT allows each platform to define it according to its needs. This is especially convenient for MIPS_GENERIC kernel where this kind of information should be determined in runtime. Use mti,mips-cpc compatible string with just a reg property to specify the register location for your platform. Signed-off-by: Paul Burton <paul.burton@mips.com> Signed-off-by: Miodrag Dinic <miodrag.dinic@mips.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@mips.com> Cc: linux-mips@linux-mips.org Cc: Ralf Baechle <ralf@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/18513/ Signed-off-by: James Hogan <jhogan@kernel.org>
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@ -10,6 +10,8 @@
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#include <linux/errno.h>
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#include <linux/percpu.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/spinlock.h>
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#include <asm/mips-cps.h>
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@ -22,6 +24,17 @@ static DEFINE_PER_CPU_ALIGNED(unsigned long, cpc_core_lock_flags);
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phys_addr_t __weak mips_cpc_default_phys_base(void)
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{
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struct device_node *cpc_node;
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struct resource res;
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int err;
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cpc_node = of_find_compatible_node(of_root, NULL, "mti,mips-cpc");
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if (cpc_node) {
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err = of_address_to_resource(cpc_node, 0, &res);
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if (!err)
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return res.start;
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}
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return 0;
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}
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