Re: [PATCH v3 2/3] pmdomain: mediatek: Add support for secure modem power domain control
AngeloGioacchino Del Regno <[email protected]>
| Newsgroups | org.infradead.lists.linux-mediatek,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm |
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| Message-ID | <[email protected]> |
On 7/20/26 22:46, Nikolai Burov via B4 Relay wrote: > From: Nikolai Burov <[email protected]> > > 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 <[email protected]> Reviewed-by: AngeloGioacchino Del Regno <[email protected]>