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soc: mediatek: pm-domains: Add support always on flag

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There is a t-phy shared by PCIe and USB3 on mt8195, if the t-phy is
used by PCIe, when power off its mtcmos, need software reset it
(workaround way, usually hardware do it, but has an issue on mt8195),
but it has side effect to USB2 phy(works with USB3 phy to support
USB3.2 Gen1), so add support GENPD_FLAG_ALWAYS_ON flag, and make its
power always on.
Another reason is that USB3.2 Gen1/2 need keep power always on when
support runtime-pm due to hardware limitation until now.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220617095841.23031-1-chunfeng.yun@mediatek.com
[mb: smaller nit fixes on commit message]
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Chunfeng Yun 2022-06-17 17:58:41 +08:00 committed by Matthias Brugger
parent 38077cb39b
commit 72be1e7a44
3 changed files with 6 additions and 1 deletions
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2
drivers/soc/mediatek/mt8195-pm-domains.h
View File

@ -67,7 +67,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8195[] = {
.ctl_offs = 0x334,
.pwr_sta_offs = 0x174,
.pwr_sta2nd_offs = 0x178,
.caps = MTK_SCPD_ACTIVE_WAKEUP,
.caps = MTK_SCPD_ACTIVE_WAKEUP | MTK_SCPD_ALWAYS_ON,
},
[MT8195_POWER_DOMAIN_CSI_RX_TOP] = {
.name = "csi_rx_top",

3
drivers/soc/mediatek/mtk-pm-domains.c
View File

@ -428,6 +428,9 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret);
goto err_put_subsys_clocks;
}
if (MTK_SCPD_CAPS(pd, MTK_SCPD_ALWAYS_ON))
pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
}
if (scpsys->domains[id]) {

2
drivers/soc/mediatek/mtk-pm-domains.h
View File

@ -8,6 +8,8 @@
#define MTK_SCPD_SRAM_ISO BIT(2)
#define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3)
#define MTK_SCPD_DOMAIN_SUPPLY BIT(4)
/* can't set MTK_SCPD_KEEP_DEFAULT_OFF at the same time */
#define MTK_SCPD_ALWAYS_ON BIT(5)
#define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
#define SPM_VDE_PWR_CON 0x0210