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pmdomain: tegra: Add support for multi-socket platforms

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On multi-socket platforms each socket has its own BPMP that is
registered with the kernel. For such platforms prefix the NUMA ID for
each socket to the BPMP powergate name to ensure there is a unique name
for each power-domain. Note that we only add the NUMA ID for powergates
that return a valid name because an invalid name indicates that the
powergate ID is not supported.

Note the check for the NULL string is moved into the function
tegra_bpmp_powergate_get_name(), because in the multi-socket case we
must only add the prefix if we receive a valid name. A NULL string
indicates that there is no valid powergate associated with the ID that
is being queried.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Jon Hunter 2026-06-02 20:32:48 +01:00 committed by Ulf Hansson
parent 7528403281
commit 9956ad2afd
1 changed files with 8 additions and 1 deletions
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9
drivers/pmdomain/tegra/powergate-bpmp.c
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@ -137,6 +137,13 @@ static char *tegra_bpmp_powergate_get_name(struct tegra_bpmp *bpmp,
if (err < 0 || msg.rx.ret < 0)
return NULL;
if (response.get_name.name[0] == '\0')
return NULL;
if (dev_to_node(bpmp->dev) != NUMA_NO_NODE)
return kasprintf(GFP_KERNEL, "%d-%s", dev_to_node(bpmp->dev),
response.get_name.name);
return kstrdup(response.get_name.name, GFP_KERNEL);
}
@ -234,7 +241,7 @@ tegra_bpmp_probe_powergates(struct tegra_bpmp *bpmp,
struct tegra_powergate_info *info = &powergates[count];
info->name = tegra_bpmp_powergate_get_name(bpmp, id);
if (!info->name || info->name[0] == '\0') {
if (!info->name) {
num_holes++;
continue;
}