u-boot.git/drivers/serial, branch v2024.07

Revert "Merge patch series "arm: dts: am62-beagleplay: Fix Beagleplay Ethernet""

2024-05-19T14:16:36+00:00

When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay
Ethernet"' I failed to notice that b4 noticed it was based on next and
so took that as the base commit and merged that part of next to master.

This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing
changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35.

Reported-by: Jonas Karlman 
Signed-off-by: Tom Rini

Merge patch series "arm: Add Analog Devices SC5xx Machine Type"

2024-05-08T01:24:07+00:00

Greg Malysa  says:

This series adds support for the ADI SC5xx machine type and includes two
core drivers that are required for being able to boot any board--a UART
driver, the gptimer driver which is used as a clock reference (CNTVCNT
is not supported on the armv7 sc5xx SoCs) and the clock tree driver. Our
corresponding Linux support relies on u-boot configuring the clocks
correctly before booting, so it is not possible to boot any board
without the CGU/CDU configuration happening here. There are also no
board files, device trees, or defconfigs included here, but some common
definitions that will be used to build board files currently are. The
sc5xx SoCs themselves include many armv7 families (sc57x, sc58x, and
sc594) all using an ARM Cortex-A5, and one armv8 family (sc598) indended
to be a drop-in replacement for the SC594 in terms of peripherals, with
a Cortex-A55 instead.

Some of the configuration code in dmcinit and clkinit is quite scary and
causes a lot of checkpatch violations. It is modified from code
initially provided by ADI, but it has not been fully rewritten. There's
a question of how important it is to clean up this code--it has some
quality violations, but it has been in use (including in production) for
over two years and is known to work for performing the low level SoC
initialization, while a rewrite might introduce timing or sequence bugs
that could take a significant amount of time to detect in the future.

drivers: serial: Add in UART for ADI SC5XX-family processors

2024-05-08T01:24:00+00:00

Co-developed-by: Greg Malysa 
Signed-off-by: Greg Malysa 
Co-developed-by: Ian Roberts 
Signed-off-by: Ian Roberts 
Signed-off-by: Vasileios Bimpikas 
Signed-off-by: Utsav Agarwal 
Signed-off-by: Arturs Artamonovs 
Signed-off-by: Nathan Barrett-Morrison

serial: Remove and add needed includes

2024-05-07T14:00:56+00:00

Remove  from this driver directory and when needed
add missing include files directly.

Reviewed-by: Peter Robinson 
Signed-off-by: Tom Rini

serial_msm: Enable RS232 flow control

2024-04-23T11:29:23+00:00

SE HMIBSC board debug console requires RS232 flow control, so enable
corresponding support if RS232 gpios are present.

Reviewed-by: Caleb Connolly 
Signed-off-by: Sumit Garg 
Signed-off-by: Caleb Connolly

apq8016: Add support for UART1 clocks and pinmux

2024-04-23T11:29:22+00:00

SE HMIBSC board uses UART1 as the main debug console, so add
corresponding clocks and pinmux support. Along with that update
instructions to enable clocks for debug UART support.

Reviewed-by: Caleb Connolly 
Signed-off-by: Sumit Garg 
Signed-off-by: Caleb Connolly

serial: msm: calculate bit clock divider

2024-04-23T11:29:16+00:00

The driver currently requires the bit clock divider be hardcoded in
devicetree (or use the hardcoded default from apq8016).

The bit clock divider is used to derive the baud rate from the core
clock:

  baudrate = clk_rate / csr_div

clk_rate is the actual programmed core clock rate which is returned by
clk_set_rate(), and this UART driver only supports a baudrate of 115200.
We can therefore determine the appropriate value for UARTDM_CSR by
iterating over the possible values and finding the one where the
equation above holds true for a baudrate of 115200.

Implement this logic and drop the non-standard DT bindings for this
driver.

Tested on dragonboard410c.

Tested-by: Robert Marko 
Signed-off-by: Caleb Connolly

serial: msm_serial: remove .clk_rate from debug UART

2024-04-23T11:29:14+00:00

MSM serial in DEBUG UART mode is trying to set .clk_rate, but the
msm_serial_data structure does not have such property at all, so lets
remove it as otherwise it will fail compiling.

Fixes: 90023bdfe979 ("serial: msm: add debug UART")
Signed-off-by: Robert Marko 
Reviewed-by: Caleb Connolly 
Signed-off-by: Caleb Connolly

serial: allow selecting MSM debug UART with ARCH_IPQ40XX

2024-04-23T11:29:13+00:00

Currently, DEBUG_UART_MSM depends on ARCH_SNAPDRAGON only, but IPQ40XX
devices also use the same UART HW so they can also use the debug UART.

So, allow selecting DEBUG_UART_MSM when using ARCH_IPQ40XX as well.

Signed-off-by: Robert Marko 
Reviewed-by: Caleb Connolly 
Signed-off-by: Caleb Connolly

serial: lpuart: use ipg clk for i.MX7ULP

2024-04-15T11:09:31+00:00

To i.MX7ULP compatible lpuart, there is only ipg clk, no per clk.
So add a devtype check for i.MX7ULP.

Signed-off-by: Peng Fan