Commits
Robert Lee committed 8fa739fd1a1
ENGR00225700: ARM: mx6sl: Fix suspend/resume lockup Currently, the sequence and functionality we use to enter and exit suspend causes us to hang upon resuming. It appears that this is being caused by two things. The first is the powering off of the 2p5 rail which powers the IO pullups and pulldowns. The DQS pins were configured as pull downs. The second is switching the DQS pins from differential to CMOS mode (and back). This second problem only occurs on a few EVK boards. It is believed that these changes are causing glitches on the mmdc DQS pins which is putting garbage in the FIFO (or causing some other FIFO problem). This patch adds two mmdc0 FIFO resets after exiting the suspend. Two are thought to be needed per previous FIFO reset experience by Mike Kjar. Since the MMDC0 FIFO will be cleaned each time, we can now remove the code that configured the DQS lines as pull downs as we no longer care if they float. Signed-off-by: Robert Lee <robert.lee@freescale.com>