diff options
Diffstat (limited to 'drivers/soc')
-rw-r--r-- | drivers/soc/mediatek/mtk-scpsys.c | 80 |
1 files changed, 53 insertions, 27 deletions
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index 73e4a1aace2f..fafc0d311cf8 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -230,12 +230,57 @@ static int scpsys_clk_enable(struct clk *clk[], int max_num) return ret; } +static int scpsys_sram_enable(struct scp_domain *scpd, void __iomem *ctl_addr) +{ + u32 val; + u32 pdn_ack = scpd->data->sram_pdn_ack_bits; + int tmp; + + val = readl(ctl_addr); + val &= ~scpd->data->sram_pdn_bits; + writel(val, ctl_addr); + + /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */ + if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) { + /* + * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for + * MT7622_POWER_DOMAIN_WB and thus just a trivial setup + * is applied here. + */ + usleep_range(12000, 12100); + } else { + /* Either wait until SRAM_PDN_ACK all 1 or 0 */ + int ret = readl_poll_timeout(ctl_addr, tmp, + (tmp & pdn_ack) == 0, + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + if (ret < 0) + return ret; + } + + return 0; +} + +static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr) +{ + u32 val; + u32 pdn_ack = scpd->data->sram_pdn_ack_bits; + int tmp; + + val = readl(ctl_addr); + val |= scpd->data->sram_pdn_bits; + writel(val, ctl_addr); + + /* Either wait until SRAM_PDN_ACK all 1 or 0 */ + return readl_poll_timeout(ctl_addr, tmp, + (tmp & pdn_ack) == pdn_ack, + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); +} + static int scpsys_power_on(struct generic_pm_domain *genpd) { struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd); struct scp *scp = scpd->scp; void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs; - u32 pdn_ack = scpd->data->sram_pdn_ack_bits; u32 val; int ret, tmp; @@ -247,6 +292,7 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) if (ret) goto err_clk; + /* subsys power on */ val = readl(ctl_addr); val |= PWR_ON_BIT; writel(val, ctl_addr); @@ -268,24 +314,9 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) val |= PWR_RST_B_BIT; writel(val, ctl_addr); - val &= ~scpd->data->sram_pdn_bits; - writel(val, ctl_addr); - - /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */ - if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) { - /* - * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for - * MT7622_POWER_DOMAIN_WB and thus just a trivial setup is - * applied here. - */ - usleep_range(12000, 12100); - - } else { - ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == 0, - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); - if (ret < 0) - goto err_pwr_ack; - } + ret = scpsys_sram_enable(scpd, ctl_addr); + if (ret < 0) + goto err_pwr_ack; if (scpd->data->bus_prot_mask) { ret = mtk_infracfg_clear_bus_protection(scp->infracfg, @@ -312,7 +343,6 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd); struct scp *scp = scpd->scp; void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs; - u32 pdn_ack = scpd->data->sram_pdn_ack_bits; u32 val; int ret, tmp; @@ -324,16 +354,12 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) goto out; } - val = readl(ctl_addr); - val |= scpd->data->sram_pdn_bits; - writel(val, ctl_addr); - - /* wait until SRAM_PDN_ACK all 1 */ - ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == pdn_ack, - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + ret = scpsys_sram_disable(scpd, ctl_addr); if (ret < 0) goto out; + /* subsys power off */ + val = readl(ctl_addr); val |= PWR_ISO_BIT; writel(val, ctl_addr); |