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

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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>
This commit is contained in:
Roger Quadros 2016-05-18 15:28:06 +03:00 committed by Kishon Vijay Abraham I
parent 06061dc63b
commit 31b2a32f70
1 changed files with 11 additions and 4 deletions
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15
drivers/phy/phy-ti-pipe3.c
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@ -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;
}