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sifive_u: Add clock DT node for GEM ethernet

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The GEM ethernet on SiFive unleashed has fixed input clock
of 125MHz as-per SiFive FU540 manual. This patch updates FDT
generation for QEMU sifive_u machine to provide fixed-rate
clock for GEM ethernet.

Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Anup Patel 2018-12-13 18:34:52 +00:00 • committed by Palmer Dabbelt
parent a9a0c2d123
commit fe93582cf5
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GPG key ID: EF4CA1502CCBAB41
2 changed files with 19 additions and 2 deletions
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3
include/hw/riscv/sifive_u.h
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@ -63,7 +63,8 @@ enum {
};
enum {
SIFIVE_U_CLOCK_FREQ = 1000000000
SIFIVE_U_CLOCK_FREQ = 1000000000,
SIFIVE_U_GEM_CLOCK_FREQ = 125000000
};
#define SIFIVE_U_PLIC_HART_CONFIG "MS"