[PATCH v3 15/16] soc: mediatek: pm-domains: Add default power off flag
From: Enric Balletbo i Serra <hidden>
Date: 2020-10-26 17:55:59
Also in:
linux-mediatek, lkml
Subsystem:
arm/mediatek soc support, the rest · Maintainers:
Matthias Brugger, AngeloGioacchino Del Regno, Linus Torvalds
From: Weiyi Lu <redacted> For some power domain, like conn on MT8192, it should be default OFF. Because the power on/off control relies the function of connectivity chip and its firmware. And if project choose other chip vendor solution, those necessary connectivity functions will not provided. Signed-off-by: Weiyi Lu <redacted> Signed-off-by: Enric Balletbo i Serra <redacted> --- Changes in v3: None Changes in v2: None drivers/soc/mediatek/mtk-pm-domains.c | 23 +++++++++++++++++------ drivers/soc/mediatek/mtk-pm-domains.h | 1 + 2 files changed, 18 insertions(+), 6 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c
index 63993076a544..fe0e955076a0 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.c
+++ b/drivers/soc/mediatek/mtk-pm-domains.c@@ -378,10 +378,16 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no * software. The unused domains will be switched off during * late_init time. */ - ret = scpsys_power_on(&pd->genpd); - if (ret < 0) { - dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret); - goto err_unprepare_clocks; + if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF)) { + if (scpsys_domain_is_on(pd)) + dev_warn(scpsys->dev, + "%pOF: A default off power domain has been ON\n", node); + } else { + ret = scpsys_power_on(&pd->genpd); + if (ret < 0) { + dev_err(scpsys->dev, "%pOF: failed to power on domain: %d\n", node, ret); + goto err_unprepare_clocks; + } } if (scpsys->domains[id]) {
@@ -395,7 +401,11 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no pd->genpd.power_off = scpsys_power_off; pd->genpd.power_on = scpsys_power_on; - pm_genpd_init(&pd->genpd, NULL, false); + if (MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF)) + pm_genpd_init(&pd->genpd, NULL, true); + else + pm_genpd_init(&pd->genpd, NULL, false); + scpsys->domains[id] = &pd->genpd; return scpsys->pd_data.domains[id];
@@ -478,7 +488,8 @@ static void scpsys_remove_one_domain(struct scpsys_domain *pd) "failed to remove domain '%s' : %d - state may be inconsistent\n", pd->genpd.name, ret); - scpsys_power_off(&pd->genpd); + if (!MTK_SCPD_CAPS(pd, MTK_SCPD_KEEP_DEFAULT_OFF)) + scpsys_power_off(&pd->genpd); clk_bulk_unprepare(pd->num_clks, pd->clks); clk_bulk_put(pd->num_clks, pd->clks);
diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h
index 2ad213be84a5..0fa6a938b40c 100644
--- a/drivers/soc/mediatek/mtk-pm-domains.h
+++ b/drivers/soc/mediatek/mtk-pm-domains.h@@ -6,6 +6,7 @@ #define MTK_SCPD_ACTIVE_WAKEUP BIT(0) #define MTK_SCPD_FWAIT_SRAM BIT(1) #define MTK_SCPD_SRAM_ISO BIT(2) +#define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3) #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) #define SPM_VDE_PWR_CON 0x0210
--
2.28.0
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