Messages in this thread Patch in this message | | | From | Fabien Parent <> | Subject | [PATCH 3/4] soc: mediatek: add support of MTK_SCPD_STRICT_BUSP cap | Date | Mon, 30 May 2022 22:42:13 +0200 |
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From: Alexandre Bailon <abailon@baylibre.com>
This adds support of MTK_SCPD_STRICT_BUSP cap. This is required by the mt8365, for the MM power domain.
Signed-off-by: Alexandre Bailon <abailon@baylibre.com> Signed-off-by: Fabien Parent <fparent@baylibre.com> --- drivers/soc/mediatek/mtk-pm-domains.c | 37 ++++++++++++++++++++------- drivers/soc/mediatek/mtk-pm-domains.h | 1 + 2 files changed, 29 insertions(+), 9 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c index 90b91b3b19a8..beaa5785fda2 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.c +++ b/drivers/soc/mediatek/mtk-pm-domains.c @@ -263,17 +263,36 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_ISO_BIT); regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_RST_B_BIT); - ret = clk_bulk_prepare_enable(pd->num_subsys_clks, pd->subsys_clks); - if (ret) - goto err_pwr_ack; + if (MTK_SCPD_CAPS(pd, MTK_SCPD_STRICT_BUSP)) { + /* + * In few Mediatek platforms(e.g. MT6779), the bus protect + * policy is stricter, which leads to bus protect release must + * be prior to bus access. + */ + ret = scpsys_sram_enable(pd); + if (ret < 0) + goto err_pwr_ack; - ret = scpsys_sram_enable(pd); - if (ret < 0) - goto err_disable_subsys_clks; + ret = scpsys_bus_protect_disable(pd); + if (ret < 0) + goto err_pwr_ack; - ret = scpsys_bus_protect_disable(pd); - if (ret < 0) - goto err_disable_sram; + ret = clk_bulk_prepare_enable(pd->num_subsys_clks, pd->subsys_clks); + if (ret < 0) + goto err_pwr_ack; + } else { + ret = clk_bulk_prepare_enable(pd->num_subsys_clks, pd->subsys_clks); + if (ret) + goto err_pwr_ack; + + ret = scpsys_sram_enable(pd); + if (ret < 0) + goto err_disable_subsys_clks; + + ret = scpsys_bus_protect_disable(pd); + if (ret < 0) + goto err_disable_sram; + } return 0; diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h index a3955d960233..5347471bc3c4 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.h +++ b/drivers/soc/mediatek/mtk-pm-domains.h @@ -8,6 +8,7 @@ #define MTK_SCPD_SRAM_ISO BIT(2) #define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3) #define MTK_SCPD_DOMAIN_SUPPLY BIT(4) +#define MTK_SCPD_STRICT_BUSP BIT(5) #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) #define SPM_VDE_PWR_CON 0x0210 -- 2.36.1
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