[PATCH v3 2/3] pmdomain: mediatek: Add support for secure modem power domain control

[AngeloGioacchino Del Regno]

On 7/20/26 22:46, Nikolai Burov via B4 Relay wrote:
> From: Nikolai Burov <nikolai.burov at jolla.com>
> 
> On recent MediaTek SoCs such as MT6858, the kernel is required to use
> a secure monitor call (SMC) to enable or disable the modem power domain.
> The power domain control register can be read, but firmware prevents it
> from being modified directly. Some other parts of the power sequence,
> such as setting the ext_buck_iso register, still need to be performed on
> the kernel side.
> 
> In preparation for modem support, add a flag to enable this new power
> sequence for SoCs that need it. Power domains using this flag are not
> expected to configure any bus protection registers, since these are
> handled internally by the SMC call.
> 
> Signed-off-by: Nikolai Burov <nikolai.burov at jolla.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>