Signed-off-by: Stefan Tauner <[email protected]>
---
sb600spi.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/sb600spi.c b/sb600spi.c
index 42a0ece..95e5ad1 100644
--- a/sb600spi.c
+++ b/sb600spi.c
@@ -246,6 +246,16 @@ int sb600_probe_spi(struct pci_dev *dev)
msg_pdbg("PrefetchEnSPIFromHost=%i, SpiOpEnInLpcMode=%i\n",
tmp & 0x1, (tmp & 0x20) >> 5);
tmp = mmio_readl(sb600_spibar);
+ if (((tmp >> 18) & 0x3) != 0) {
+ msg_pdbg("Disabling fast reads and setting SPI clock to 16.5
MHz...");
+ tmp &= ~(0x3 << 18);
+ mmio_writel(tmp, sb600_spibar);
+ mmio_writeb(mmio_readb(sb600_spibar + 0xd) | (0x3 << 4),
sb600_spibar + 0xd);
+
+ tmp = mmio_readl(sb600_spibar);
+ msg_pdbg(" done\n");
+ }
+
/* FIXME: If SpiAccessMacRomEn or SpiHostAccessRomEn are zero on
* SB700 or later, reads and writes will be corrupted. Abort in this
* case. Make sure to avoid this check on SB600.
--
Kind regards, Stefan Tauner
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