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timer: sandbox: work without device tree 

A default invocation of sandbox U-Boot apparently uses no device tree,
which means that no timer is registers, which in turn means that the
sleep shell command hangs.

Fix the sandbox timer code to register a device when there's no DT, just
like e.g. the sandbox reset driver does. When there's no DT, the DM uclass
can't initialize clock_rate from DT, so set a default value in the
timer code instead.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2016-01-06 10:33:04 -07:00 committed by Simon Glass
parent 0a7edce0ef
commit bb883f824c
1 changed files with 10 additions and 0 deletions
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10
drivers/timer/sandbox_timer.c
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@ -27,6 +27,11 @@ static int sandbox_timer_get_count(struct udevice *dev, u64 *count)
static int sandbox_timer_probe(struct udevice *dev)
{
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
if (!uc_priv->clock_rate)
uc_priv->clock_rate = 1000000;
return 0;
}
@ -47,3 +52,8 @@ U_BOOT_DRIVER(sandbox_timer) = {
.ops = &sandbox_timer_ops,
.flags = DM_FLAG_PRE_RELOC,
};
/* This is here in case we don't have a device tree */
U_BOOT_DEVICE(sandbox_timer_non_fdt) = {
.name = "sandbox_timer",
};