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 <reniusche...@gmail.com>
---
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
