[U-Boot] [PATCH] IMX: serial: dm: Set DM_FLAG_PRE_RELOC in the IMX uart driver

[sbabic at denx.de <sbabic@denx.de>]

> The DM_FLAG_PRE_RELOC shall be set unconditionally as this driver is going
> to be re-used in both early SPL and U-Boot proper's pre-reloc.
> For i.MX based devices it is crucial to have available the serial console
> before relocation (otherwise the board may hand).
> The device definition may be provided either via device tree description or
> with U_BOOT_DEVICE(mxc_serial) definition. In the latter case the device
> will not bind in U-Boot proper when DM_FLAG_PRE_RELOC is not set.
> The !CONFIG_IS_ENABLED(OF_CONTROL) #if check was set as a "workaround" for
> DM problem described in following commit 4687919684e0
> ("serial: Remove DM_FLAG_PRE_RELOC flag in various drivers").
> Let's look on this check more thoroughly - we add this flag if the board
> doesn't support OF_CONTROL. This is a bit strange as the serial_mxc.c can
> be used with CONFIG_DM_SERIAL but without corresponding device tree
> description (OF_CONTROL). In such case the aforementioned
> U_BOOT_DEVICE(mxc_serial) definition is used.
> Other boards/SoCs have this flag set unconditionally for serial driver.
> Signed-off-by: Lukasz Majewski <lukma@denx.de>

Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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