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authorTang Yuantian <Yuantian.Tang@freescale.com>2015-12-16 05:43:50 (GMT)
committerTejun Heo <tj@kernel.org>2015-12-16 15:24:35 (GMT)
commite3a6dadc6dca64f464238f8a36876c610400eef9 (patch)
treef9eebe97b8aeda0692aba16c45302aeb31e8ce3f /drivers/ata
parentef0cc7fef4721aa19663da7475c8b862f0a35e0b (diff)
downloadlinux-e3a6dadc6dca64f464238f8a36876c610400eef9.tar.xz
ahci: qoriq: Update the default Rx watermark value
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.Tang@freescale.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci_qoriq.c3
1 files changed, 2 insertions, 1 deletions
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;
}