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cpu: Bind timer driver for boot hart

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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>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Atish Patra 2019-02-25 08:15:14 +00:00 committed by Andes
parent ee0633ef8b
commit 007056f495
1 changed files with 4 additions and 3 deletions
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7
drivers/cpu/riscv_cpu.c
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@ -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");