mmc: sdhci-pci: Avoid 3.3V signaling on some NI 904x
On some NI 904x devices, using 3.3V signaling for extended periods of
time will physically damage the pads connected to the SDHC, eventually
causing complete failure of the controller. To work around this,
require that we avoid 3.3V signaling.
Signed-off-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: Jennifer Dahm <jennifer.dahm@ni.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 78c25ad..9dfbd7f 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -832,6 +832,10 @@ static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_SD)
slot->host->mmc_host_ops.get_cd = bxt_get_cd;
+ if (slot->chip->pdev->subsystem_vendor == PCI_VENDOR_ID_NI &&
+ slot->chip->pdev->subsystem_device == PCI_SUBDEVICE_ID_NI_78E3)
+ slot->host->mmc->caps2 |= MMC_CAP2_AVOID_3_3V;
+
return 0;
}
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index 5cbcdc4..db9cb54 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -54,6 +54,7 @@
#define PCI_DEVICE_ID_REALTEK_5250 0x5250
#define PCI_SUBDEVICE_ID_NI_7884 0x7884
+#define PCI_SUBDEVICE_ID_NI_78E3 0x78e3
#define PCI_VENDOR_ID_ARASAN 0x16e6
#define PCI_DEVICE_ID_ARASAN_PHY_EMMC 0x0670
