diff options
Diffstat (limited to 'drivers/mmc/host/mmci.c')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 604e41db00db..d135c76c4855 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -62,6 +62,7 @@ static unsigned int fmax = 515633; * @signal_direction: input/out direction of bus signals can be indicated * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock * @busy_detect: true if busy detection on dat0 is supported + * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply */ struct variant_data { unsigned int clkreg; @@ -76,6 +77,7 @@ struct variant_data { bool signal_direction; bool pwrreg_clkgate; bool busy_detect; + bool pwrreg_nopower; }; static struct variant_data variant_arm = { @@ -109,6 +111,7 @@ static struct variant_data variant_u300 = { .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, .pwrreg_clkgate = true, + .pwrreg_nopower = true, }; static struct variant_data variant_nomadik = { @@ -121,6 +124,7 @@ static struct variant_data variant_nomadik = { .pwrreg_powerup = MCI_PWR_ON, .signal_direction = true, .pwrreg_clkgate = true, + .pwrreg_nopower = true, }; static struct variant_data variant_ux500 = { @@ -135,6 +139,7 @@ static struct variant_data variant_ux500 = { .signal_direction = true, .pwrreg_clkgate = true, .busy_detect = true, + .pwrreg_nopower = true, }; static struct variant_data variant_ux500v2 = { @@ -150,6 +155,7 @@ static struct variant_data variant_ux500v2 = { .signal_direction = true, .pwrreg_clkgate = true, .busy_detect = true, + .pwrreg_nopower = true, }; static int mmci_card_busy(struct mmc_host *mmc) @@ -1759,6 +1765,41 @@ static int mmci_resume(struct device *dev) #endif #ifdef CONFIG_PM_RUNTIME +static void mmci_save(struct mmci_host *host) +{ + unsigned long flags; + + if (host->variant->pwrreg_nopower) { + spin_lock_irqsave(&host->lock, flags); + + writel(0, host->base + MMCIMASK0); + writel(0, host->base + MMCIDATACTRL); + writel(0, host->base + MMCIPOWER); + writel(0, host->base + MMCICLOCK); + mmci_reg_delay(host); + + spin_unlock_irqrestore(&host->lock, flags); + } + +} + +static void mmci_restore(struct mmci_host *host) +{ + unsigned long flags; + + if (host->variant->pwrreg_nopower) { + spin_lock_irqsave(&host->lock, flags); + + writel(host->clk_reg, host->base + MMCICLOCK); + writel(host->datactrl_reg, host->base + MMCIDATACTRL); + writel(host->pwr_reg, host->base + MMCIPOWER); + writel(MCI_IRQENABLE, host->base + MMCIMASK0); + mmci_reg_delay(host); + + spin_unlock_irqrestore(&host->lock, flags); + } +} + static int mmci_runtime_suspend(struct device *dev) { struct amba_device *adev = to_amba_device(dev); @@ -1767,6 +1808,7 @@ static int mmci_runtime_suspend(struct device *dev) if (mmc) { struct mmci_host *host = mmc_priv(mmc); pinctrl_pm_select_sleep_state(dev); + mmci_save(host); clk_disable_unprepare(host->clk); } @@ -1781,6 +1823,7 @@ static int mmci_runtime_resume(struct device *dev) if (mmc) { struct mmci_host *host = mmc_priv(mmc); clk_prepare_enable(host->clk); + mmci_restore(host); pinctrl_pm_select_default_state(dev); } |