From: Atish Patra atish.patra@wdc.com
Currently, timer driver is bound only for hart0.
There is no mandatory requirement that hart0 should always come up. In fact, HiFive Unleashed SoC hart0 doesn't boot in S-mode because it only has M-mode.
The timer driver should be bound for boot hart.
Signed-off-by: Atish Patra atish.patra@wdc.com --- drivers/cpu/riscv_cpu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/cpu/riscv_cpu.c b/drivers/cpu/riscv_cpu.c index 5e15df590e..f77c126499 100644 --- a/drivers/cpu/riscv_cpu.c +++ b/drivers/cpu/riscv_cpu.c @@ -10,6 +10,8 @@ #include <dm/device-internal.h> #include <dm/lists.h>
+DECLARE_GLOBAL_DATA_PTR; + static int riscv_cpu_get_desc(struct udevice *dev, char *buf, int size) { const char *isa; @@ -62,7 +64,6 @@ static int riscv_cpu_bind(struct udevice *dev)
/* save the hart id */ plat->cpu_id = dev_read_addr(dev); - /* first examine the property in current cpu node */ ret = dev_read_u32(dev, "timebase-frequency", &plat->timebase_freq); /* if not found, then look at the parent /cpus node */ @@ -71,7 +72,7 @@ static int riscv_cpu_bind(struct udevice *dev) &plat->timebase_freq);
/* - * Bind riscv-timer driver on hart 0 + * Bind riscv-timer driver on boot hart. * * We only instantiate one timer device which is enough for U-Boot. * Pass the "timebase-frequency" value as the driver data for the @@ -80,7 +81,7 @@ static int riscv_cpu_bind(struct udevice *dev) * Return value is not checked since it's possible that the timer * driver is not included. */ - if (!plat->cpu_id && plat->timebase_freq) { + if (plat->cpu_id == gd->arch.boot_hart && plat->timebase_freq) { drv = lists_driver_lookup_name("riscv_timer"); if (!drv) { debug("Cannot find the timer driver, not included?\n");