Due to Errata i783, SATA breaks if its DPLL is idled. The recommeded
workaround to issue a softreset to the SATA controller doesn't seem to
work. Here we just prevent SATA DPLL from Idling and hence avoid
the issue altogether.
Signed-off-by: Roger Quadros <rog...@ti.com>
---
drivers/phy/phy-ti-pipe3.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index d3c085a..611f7c3 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -238,6 +238,10 @@ static int ti_pipe3_exit(struct phy *x)
u32 val;
unsigned long timeout;
+ /* SATA DPLL can't be powered down due to Errata i783 */
+ if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata"))
+ return 0;
+
/* Put DPLL in IDLE mode */
val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
val |= PLL_IDLE;
--
1.8.3.2
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