ata: ahci_mvebu: add support for Armada 3700 variant

The main difference in the new Armada 3700 is that no address
decoding needs to take place in the driver probe.

[gregory.clement@free-electrons.com: reformulate the commit log]

Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Nadav Haklai <nadavh@marvell.com>
Tested-by: Nadav Haklai <nadavh@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 9 insertions, 5 deletions

diff --git a/drivers/ata/ahci_mvebu.c b/drivers/ata/ahci_mvebu.c
index f7a7fa81740e..de7128d81e9c 100644
--- a/drivers/ata/ahci_mvebu.c
+++ b/drivers/ata/ahci_mvebu.c
@@ -112,12 +112,15 @@ static int ahci_mvebu_probe(struct platform_device *pdev)
         if (rc)
                 return rc;
 
-        dram = mv_mbus_dram_info();
-        if (!dram)
-                return -ENODEV;
+        if (of_device_is_compatible(pdev->dev.of_node,
+                                    "marvell,armada-380-ahci")) {
+                dram = mv_mbus_dram_info();
+                if (!dram)
+                        return -ENODEV;
 
-        ahci_mvebu_mbus_config(hpriv, dram);
-        ahci_mvebu_regret_option(hpriv);
+                ahci_mvebu_mbus_config(hpriv, dram);
+                ahci_mvebu_regret_option(hpriv);
+        }
 
         rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info,
                                      &ahci_platform_sht);
@@ -133,6 +136,7 @@ disable_resources:
 
 static const struct of_device_id ahci_mvebu_of_match[] = {
         { .compatible = "marvell,armada-380-ahci", },
+        { .compatible = "marvell,armada-3700-ahci", },
         { },
 };
 MODULE_DEVICE_TABLE(of, ahci_mvebu_of_match);