linux-wandboard

MLK-16345 PCI: imx: final workaround of ERR010728 for pcie

Description:
	Initial VCO oscillation may fail under corner conditions such as
	cold temperature. It causes PCIe PLL fail to lock in
	initialization phase.

Project Impact:
	iMX7D PCIe PLL fails to lock and PCIe doesn.t work.

workarounds:
	To disable Duty-cycle Corrector(DCC) calibration after G_RST
	signal is de-asserted by following the sequences:
	1. De-assert the G_RST signal by clearing
	SRC_PCIEPHY_RCR[PCIEPHY_G_RST].
	2. de-assert DCC_FB_EN in Reg4 by writing data '0x29' to the register
	address 0x306d0014.
	3. assert RX_EQS, RX_EQ_SEL in Reg24 by writing data '0x48' to the
	register address 0x306d0090.
	4.assert ATT_MODE in Reg26 by writing data '0xbc' to the register
	address 0x306d0098.
	5.De-assert the CMN_RST signal by clearing register bit
	SRC_PCIEPHY_RCR[PCIEPHY_BTN].

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>