ahci: st: Add ports-implemented property in support

Despite ST AHCI version = 1.3, reading HOST_PORTS_IMPL
returns 0. So force_port_map to 1 by using ports-implemented
DT property.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/ata/ahci_st.c b/drivers/ata/ahci_st.c
index 8ff428fe8e0f..bc345f249555 100644
--- a/drivers/ata/ahci_st.c
+++ b/drivers/ata/ahci_st.c
@@ -147,6 +147,7 @@ static struct scsi_host_template ahci_platform_sht = {
 
 static int st_ahci_probe(struct platform_device *pdev)
 {
+        struct device *dev = &pdev->dev;
         struct st_ahci_drv_data *drv_data;
         struct ahci_host_priv *hpriv;
         int err;
@@ -170,6 +171,9 @@ static int st_ahci_probe(struct platform_device *pdev)
 
         st_ahci_configure_oob(hpriv->mmio);
 
+        of_property_read_u32(dev->of_node,
+                             "ports-implemented", &hpriv->force_port_map);
+
         err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info,
                                       &ahci_platform_sht);
         if (err) {