From: Tang Yuantian <yuantian.t...@freescale.com>
The PTC[RXWM] sets the watermark value for Rx FIFO. The default
value 0x20 might be insufficient for some hard drives. If the
watermark value is too small, a single-cycle overflow may occur
and is reported as a CRC or internal error in the PxSERR register.
Updated the value to 0x29 according to the validation test.
All LS platforms are affected.
Signed-off-by: Tang Yuantian <yuantian.t...@freescale.com>
---
drivers/ata/ahci_qoriq.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index 4d613f8..256d911 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -38,7 +38,7 @@
#define AHCI_PORT_PHY_3_CFG 0x0e081004
#define AHCI_PORT_PHY_4_CFG 0x00480811
#define AHCI_PORT_PHY_5_CFG 0x192c96a4
-#define AHCI_PORT_TRANS_CFG 0x08000025
+#define AHCI_PORT_TRANS_CFG 0x08000029
#define LS1043A_PORT_PHY2 0x28184d1f
#define LS1043A_PORT_PHY3 0x0e081509
@@ -169,6 +169,7 @@ static int ahci_qoriq_phy_init(struct ahci_host_priv *hpriv)
case AHCI_LS2080A:
writel(AHCI_PORT_PHY_1_CFG, reg_base + PORT_PHY1);
+ writel(AHCI_PORT_TRANS_CFG, reg_base + PORT_TRANS);
break;
}
--
2.1.0.27.g96db324
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
