diff options
| author | Anup Patel | 2020-06-01 14:45:39 +0530 |
|---|---|---|
| committer | Palmer Dabbelt | 2020-06-09 19:11:20 -0700 |
| commit | d175d699df07041befda3779f29bf7126c298730 (patch) | |
| tree | 836e0da380d6b6e4ed2cc1cd50359c1ed75f2978 /arch/riscv/kernel | |
| parent | 5cf998ba8c7bbbfec3e0d6534c9a3f860ab9920e (diff) | |
RISC-V: Rename and move plic_find_hart_id() to arch directory
The plic_find_hart_id() can be useful to other interrupt controller
drivers (such as RISC-V local interrupt driver) so we rename this
function to riscv_of_parent_hartid() and place it in arch directory
along with riscv_of_processor_hartid().
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel')
| -rw-r--r-- | arch/riscv/kernel/cpu.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index 40a3c442ac5f..6d59e6906fdd 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -44,6 +44,22 @@ int riscv_of_processor_hartid(struct device_node *node) return hart; } +/* + * Find hart ID of the CPU DT node under which given DT node falls. + * + * To achieve this, we walk up the DT tree until we find an active + * RISC-V core (HART) node and extract the cpuid from it. + */ +int riscv_of_parent_hartid(struct device_node *node) +{ + for (; node; node = node->parent) { + if (of_device_is_compatible(node, "riscv")) + return riscv_of_processor_hartid(node); + } + + return -1; +} + #ifdef CONFIG_PROC_FS static void print_isa(struct seq_file *f, const char *isa) |