When building with AARCH64 defconfig, we got warnings, fix them
by using registers base address defined as void __iomem * instead of
fdt_addr_t.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

In case there is still chars from previous bootstage to transmit, wait
for TC (Transmission Complete) bit to be set which ensure that the last
data written in the USART_TDR has been transmitted out of the shift
register.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add management of Bit 1 of USART_ISR = FE: Framing error
This bit is set by hardware when a de-synchronization, excessive noise
or a break character is detected. It is cleared by software, writing 1
to the FECF bit in the USART_ICR register (for stm32 after f4).

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

Since commit 7b3b74d32127 ("serial: serial_stm32: Enable overrun")
on STM32F7xx based boards, the first lines of serial output are
missing during boot (we no more see the U-Boot release version,
board model and DRAM size).

By enabling the uart FIFO on STM32F7, the complete U-boot log
can be sent correctly.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

Add possibility to update the serial parity used.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

Rename USART_ISR_FLAG_xxx bits to USART_ISR_xxx bits and
USART_ICR_OREF to USART_ICR_ORECF in order to match datasheets.
Sort defines by descendant order.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>

Uart status register is named USART_ISR on STM32F7, STM32H7
and STM32MP1 SoCs family, but USART_SR only on STM32F4 SoCs.

Use USART_ISR_ prefix instead of USART_SR_ .

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>