Merge remote-tracking branch 'regulator/topic/core' into regulator-next

[cascardo/linux.git] / drivers / scsi / ufs / ufshcd-pltfrm.c

diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index d2a7b12..718f12e 100644 (file)
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -40,6 +40,8 @@
 #include "ufshcd.h"
 #include "ufshcd-pltfrm.h"
 
+#define UFSHCD_DEFAULT_LANES_PER_DIRECTION             2
+
 static int ufshcd_parse_clock_info(struct ufs_hba *hba)
 {
        int ret = 0;
@@ -277,6 +279,21 @@ void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
 
+static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba)
+{
+       struct device *dev = hba->dev;
+       int ret;
+
+       ret = of_property_read_u32(dev->of_node, "lanes-per-direction",
+               &hba->lanes_per_direction);
+       if (ret) {
+               dev_dbg(hba->dev,
+                       "%s: failed to read lanes-per-direction, ret=%d\n",
+                       __func__, ret);
+               hba->lanes_per_direction = UFSHCD_DEFAULT_LANES_PER_DIRECTION;
+       }
+}
+
 /**
  * ufshcd_pltfrm_init - probe routine of the driver
  * @pdev: pointer to Platform device handle
@@ -331,6 +348,8 @@ int ufshcd_pltfrm_init(struct platform_device *pdev,
        pm_runtime_set_active(&pdev->dev);
        pm_runtime_enable(&pdev->dev);
 
+       ufshcd_init_lanes_per_dir(hba);
+
        err = ufshcd_init(hba, mmio_base, irq);
        if (err) {
                dev_err(dev, "Initialization failed\n");