| Message ID | 20210225111307.62975-1-reniuschengl@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: sdhci-pci-gli: Enable short circuit protection mechanism of GL9755 | expand |
On Thu, 25 Feb 2021 at 12:13, Renius Chen <reniuschengl@gmail.com> wrote: > > Short circuit protection mechanism of GL9755 is disabled by HW default > setting. Enable short circuit protection to prevent GL9755 from being > damaged by short circuit or over current. > > Signed-off-by: Renius Chen <reniuschengl@gmail.com> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/sdhci-pci-gli.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c > index 5606bdc08a96..7ba0fd601696 100644 > --- a/drivers/mmc/host/sdhci-pci-gli.c > +++ b/drivers/mmc/host/sdhci-pci-gli.c > @@ -123,6 +123,9 @@ > #define PCI_GLI_9755_PLLSSC 0x68 > #define PCI_GLI_9755_PLLSSC_PPM GENMASK(15, 0) > > +#define PCI_GLI_9755_SerDes 0x70 > +#define PCI_GLI_9755_SCP_DIS BIT(19) > + > #define GLI_MAX_TUNING_LOOP 40 > > /* Genesys Logic chipset */ > @@ -547,6 +550,11 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot) > value &= ~PCI_GLI_9755_DMACLK; > pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value); > > + /* enable short circuit protection */ > + pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &value); > + value &= ~PCI_GLI_9755_SCP_DIS; > + pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value); > + > gl9755_wt_off(pdev); > } > > -- > 2.27.0 >
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index 5606bdc08a96..7ba0fd601696 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -123,6 +123,9 @@ #define PCI_GLI_9755_PLLSSC 0x68 #define PCI_GLI_9755_PLLSSC_PPM GENMASK(15, 0) +#define PCI_GLI_9755_SerDes 0x70 +#define PCI_GLI_9755_SCP_DIS BIT(19) + #define GLI_MAX_TUNING_LOOP 40 /* Genesys Logic chipset */ @@ -547,6 +550,11 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot) value &= ~PCI_GLI_9755_DMACLK; pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value); + /* enable short circuit protection */ + pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &value); + value &= ~PCI_GLI_9755_SCP_DIS; + pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value); + gl9755_wt_off(pdev); }
Short circuit protection mechanism of GL9755 is disabled by HW default setting. Enable short circuit protection to prevent GL9755 from being damaged by short circuit or over current. Signed-off-by: Renius Chen <reniuschengl@gmail.com> --- drivers/mmc/host/sdhci-pci-gli.c | 8 ++++++++ 1 file changed, 8 insertions(+)