phy: ti-pipe3: Program the DPLL even if it was already locked

If bootloader has set a wrong DPLL then we must trash those values
and re-program it anyways. This fixes USB3 devices not being enumerated
on beagle-x15 if usb was started in u-boot.

We don't re-program SATA DPLL if it is locked as it was causing
SATA failures if device was hotpluged after boot.

Reported-by: Robert Nelson <robertcnelson@gmail.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index 0a477d24cf76..bf46844dc387 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -293,11 +293,18 @@ static int ti_pipe3_init(struct phy *x)
                 ret = ti_pipe3_dpll_wait_lock(phy);
         }
 
-        /* Program the DPLL only if not locked */
+        /* SATA has issues if re-programmed when locked */
         val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
-        if (!(val & PLL_LOCK))
-                if (ti_pipe3_dpll_program(phy))
-                        return -EINVAL;
+        if ((val & PLL_LOCK) && of_device_is_compatible(phy->dev->of_node,
+                                                        "ti,phy-pipe3-sata"))
+                return ret;
+
+        /* Program the DPLL */
+        ret = ti_pipe3_dpll_program(phy);
+        if (ret) {
+                ti_pipe3_disable_clocks(phy);
+                return -EINVAL;
+        }
 
         return ret;
 }