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sdhci: Specific quirk vor VIA SDHCI controller in VX855ES

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The SDHCI controller found in the VX855ES requires 10ms
delay between applying power and applying clock.

This issue has been discovered and documented by the OLPC XO1.5 team.

Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
This commit is contained in:
Harald Welte
2009-06-18 16:53:38 +02:00
committed by Pierre Ossman
parent fe9db6cbf1
commit 557b06971b
3 changed files with 29 additions and 0 deletions
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20
drivers/mmc/host/sdhci-pci.c
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@ -284,6 +284,18 @@ static const struct sdhci_pci_fixes sdhci_jmicron = {
.resume = jmicron_resume,
};
static int via_probe(struct sdhci_pci_chip *chip)
{
if (chip->pdev->revision == 0x10)
chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
return 0;
}
static const struct sdhci_pci_fixes sdhci_via = {
.probe = via_probe,
};
static const struct pci_device_id pci_ids[] __devinitdata = {
{
.vendor = PCI_VENDOR_ID_RICOH,
@ -349,6 +361,14 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
.driver_data = (kernel_ulong_t)&sdhci_jmicron,
},
{
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x95d0,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_via,
},
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},