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path: root/drivers/ata/ahci_sunxi.c
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Diffstat (limited to 'drivers/ata/ahci_sunxi.c')
-rw-r--r--drivers/ata/ahci_sunxi.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
index e44d675a30ec..b5aedca5ea3c 100644
--- a/drivers/ata/ahci_sunxi.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -27,6 +27,12 @@
#include <linux/regulator/consumer.h>
#include "ahci.h"
+/* Insmod parameters */
+static bool enable_pmp;
+module_param(enable_pmp, bool, 0);
+MODULE_PARM_DESC(enable_pmp,
+ "Enable support for sata port multipliers, only use if you use a pmp!");
+
#define AHCI_BISTAFR 0x00a0
#define AHCI_BISTCR 0x00a4
#define AHCI_BISTFCTR 0x00a8
@@ -184,7 +190,15 @@ static int ahci_sunxi_probe(struct platform_device *pdev)
goto disable_resources;
hpriv->flags = AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_MSI |
- AHCI_HFLAG_NO_PMP | AHCI_HFLAG_YES_NCQ;
+ AHCI_HFLAG_YES_NCQ;
+
+ /*
+ * The sunxi sata controller seems to be unable to successfully do a
+ * soft reset if no pmp is attached, so disable pmp use unless
+ * requested, otherwise directly attached disks do not work.
+ */
+ if (!enable_pmp)
+ hpriv->flags |= AHCI_HFLAG_NO_PMP;
rc = ahci_platform_init_host(pdev, hpriv, &ahci_sunxi_port_info);
if (rc)