| Message ID | 20201123053702.6083-1-benchuanggli@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: sdhci-pci-gli: Reduce power consumption for GL9755 | expand |
On Mon, 23 Nov 2020 at 06:38, Ben Chuang <benchuanggli@gmail.com> wrote: > > From: Ben Chuang <ben.chuang@genesyslogic.com.tw> > > For GL9755, reduce power consumption by lowering the LFCLK and disabling > the DMACLK on low-power. > > Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/sdhci-pci-gli.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c > index 9887485a4134..f10bdfbfce36 100644 > --- a/drivers/mmc/host/sdhci-pci-gli.c > +++ b/drivers/mmc/host/sdhci-pci-gli.c > @@ -97,6 +97,10 @@ > #define GLI_9755_WT_EN_ON 0x1 > #define GLI_9755_WT_EN_OFF 0x0 > > +#define PCI_GLI_9755_PECONF 0x44 > +#define PCI_GLI_9755_LFCLK GENMASK(14, 12) > +#define PCI_GLI_9755_DMACLK BIT(29) > + > #define PCI_GLI_9755_PLL 0x64 > #define PCI_GLI_9755_PLL_LDIV GENMASK(9, 0) > #define PCI_GLI_9755_PLL_PDIV GENMASK(14, 12) > @@ -519,6 +523,21 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock) > sdhci_enable_clk(host, clk); > } > > +static void gl9755_hw_setting(struct sdhci_pci_slot *slot) > +{ > + struct pci_dev *pdev = slot->chip->pdev; > + u32 value; > + > + gl9755_wt_on(pdev); > + > + pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value); > + value &= ~PCI_GLI_9755_LFCLK; > + value &= ~PCI_GLI_9755_DMACLK; > + pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value); > + > + gl9755_wt_off(pdev); > +} > + > static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot) > { > struct sdhci_host *host = slot->host; > @@ -534,6 +553,7 @@ static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot) > { > struct sdhci_host *host = slot->host; > > + gl9755_hw_setting(slot); > gli_pcie_enable_msi(slot); > slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO; > sdhci_enable_v4_mode(host); > -- > 2.29.2 >
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index 9887485a4134..f10bdfbfce36 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -97,6 +97,10 @@ #define GLI_9755_WT_EN_ON 0x1 #define GLI_9755_WT_EN_OFF 0x0 +#define PCI_GLI_9755_PECONF 0x44 +#define PCI_GLI_9755_LFCLK GENMASK(14, 12) +#define PCI_GLI_9755_DMACLK BIT(29) + #define PCI_GLI_9755_PLL 0x64 #define PCI_GLI_9755_PLL_LDIV GENMASK(9, 0) #define PCI_GLI_9755_PLL_PDIV GENMASK(14, 12) @@ -519,6 +523,21 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock) sdhci_enable_clk(host, clk); } +static void gl9755_hw_setting(struct sdhci_pci_slot *slot) +{ + struct pci_dev *pdev = slot->chip->pdev; + u32 value; + + gl9755_wt_on(pdev); + + pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value); + value &= ~PCI_GLI_9755_LFCLK; + value &= ~PCI_GLI_9755_DMACLK; + pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value); + + gl9755_wt_off(pdev); +} + static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot) { struct sdhci_host *host = slot->host; @@ -534,6 +553,7 @@ static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot) { struct sdhci_host *host = slot->host; + gl9755_hw_setting(slot); gli_pcie_enable_msi(slot); slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO; sdhci_enable_v4_mode(host);