diff options
| author | Matthias Brugger <mbrugger@suse.com> | 2020-10-30 12:36:13 +0100 |
|---|---|---|
| committer | Matthias Brugger <matthias.bgg@gmail.com> | 2020-11-27 12:04:43 +0100 |
| commit | 58a17e310a1c638a71892506f14c1e09b326ed56 (patch) | |
| tree | 833ac3c90350481cf4c6e35bab77625658a95453 /drivers/soc/mediatek/mtk-pm-domains.c | |
| parent | f414854c884364b8a563760054be615555a62b3a (diff) | |
soc: mediatek: pm-domains: Add extra sram control
For some power domains like vpu_core on MT8183 whose sram need to do clock
and internal isolation while power on/off sram. We add a cap
"MTK_SCPD_SRAM_ISO" to judge if we need to do the extra sram isolation
control or not.
Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201030113622.201188-8-enric.balletbo@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Diffstat (limited to 'drivers/soc/mediatek/mtk-pm-domains.c')
| -rw-r--r-- | drivers/soc/mediatek/mtk-pm-domains.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c index 8a21847464c2..a6f25933dbf0 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.c +++ b/drivers/soc/mediatek/mtk-pm-domains.c @@ -24,6 +24,8 @@ #define PWR_ON_BIT BIT(2) #define PWR_ON_2ND_BIT BIT(3) #define PWR_CLK_DIS_BIT BIT(4) +#define PWR_SRAM_CLKISO_BIT BIT(5) +#define PWR_SRAM_ISOINT_B_BIT BIT(6) struct scpsys_domain { struct generic_pm_domain genpd; @@ -65,12 +67,23 @@ static int scpsys_sram_enable(struct scpsys_domain *pd) u32 pdn_ack = pd->data->sram_pdn_ack_bits; struct scpsys *scpsys = pd->scpsys; unsigned int tmp; + int ret; regmap_clear_bits(scpsys->base, pd->data->ctl_offs, pd->data->sram_pdn_bits); /* Either wait until SRAM_PDN_ACK all 1 or 0 */ - return regmap_read_poll_timeout(scpsys->base, pd->data->ctl_offs, tmp, - (tmp & pdn_ack) == 0, MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + ret = regmap_read_poll_timeout(scpsys->base, pd->data->ctl_offs, tmp, + (tmp & pdn_ack) == 0, MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + if (ret < 0) + return ret; + + if (MTK_SCPD_CAPS(pd, MTK_SCPD_SRAM_ISO)) { + regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_ISOINT_B_BIT); + udelay(1); + regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_CLKISO_BIT); + } + + return 0; } static int scpsys_sram_disable(struct scpsys_domain *pd) @@ -79,6 +92,12 @@ static int scpsys_sram_disable(struct scpsys_domain *pd) struct scpsys *scpsys = pd->scpsys; unsigned int tmp; + if (MTK_SCPD_CAPS(pd, MTK_SCPD_SRAM_ISO)) { + regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_CLKISO_BIT); + udelay(1); + regmap_clear_bits(scpsys->base, pd->data->ctl_offs, PWR_SRAM_ISOINT_B_BIT); + } + regmap_set_bits(scpsys->base, pd->data->ctl_offs, pd->data->sram_pdn_bits); /* Either wait until SRAM_PDN_ACK all 1 or 0 */ |