4.14-stable review patch. If anyone has any objections, please let me know.
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From: Paul Burton paul.burton@mips.com
commit 791412dafbbfd860e78983d45cf71db603a82f67 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/mips/kernel/mips-cpc.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
--- a/arch/mips/kernel/mips-cpc.c +++ b/arch/mips/kernel/mips-cpc.c @@ -10,6 +10,8 @@
#include <linux/errno.h> #include <linux/percpu.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <linux/spinlock.h>
#include <asm/mips-cps.h> @@ -22,6 +24,17 @@ static DEFINE_PER_CPU_ALIGNED(unsigned l
phys_addr_t __weak mips_cpc_default_phys_base(void) { + struct device_node *cpc_node; + struct resource res; + int err; + + cpc_node = of_find_compatible_node(of_root, NULL, "mti,mips-cpc"); + if (cpc_node) { + err = of_address_to_resource(cpc_node, 0, &res); + if (!err) + return res.start; + } + return 0; }