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| author | Nikolai Burov <nikolai.burov@jolla.com> | 2026-07-20 23:46:47 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulfh@kernel.org> | 2026-07-24 16:44:03 +0200 |
| commit | 86cb2f65aab3792e0233ae9eeed0005e92ddfe4f (patch) | |
| tree | eb7605372deed880ac90523431f102a41626f922 /include/linux/soc | |
| parent | 8eceaa548806950e3ea4cf5cf128402bb1fb4803 (diff) | |
| download | linux-next-86cb2f65aab3792e0233ae9eeed0005e92ddfe4f.tar.gz linux-next-86cb2f65aab3792e0233ae9eeed0005e92ddfe4f.zip | |
pmdomain: mediatek: Add support for secure modem power domain control
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@jolla.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
Diffstat (limited to 'include/linux/soc')
| -rw-r--r-- | include/linux/soc/mediatek/mtk_sip_svc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/soc/mediatek/mtk_sip_svc.h b/include/linux/soc/mediatek/mtk_sip_svc.h index abe24a73ee19..6c95a29b79fa 100644 --- a/include/linux/soc/mediatek/mtk_sip_svc.h +++ b/include/linux/soc/mediatek/mtk_sip_svc.h @@ -22,6 +22,9 @@ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, MTK_SIP_SMC_CONVENTION, \ ARM_SMCCC_OWNER_SIP, fn_id) +/* Modem related SMC call */ +#define MTK_SIP_KERNEL_CCCI_CONTROL MTK_SIP_SMC_CMD(0x505) + /* DVFSRC SMC calls */ #define MTK_SIP_DVFSRC_VCOREFS_CONTROL MTK_SIP_SMC_CMD(0x506) |