This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a
board definition for ODROID-C2. This initial submission only supports
UART and Ethernet (through the existing Designware driver). DTS files
are the ones submitted to Linux arm-soc for 4.7 [1].

[1] https://patchwork.ozlabs.org/patch/603583/Signed-off-by: NBeniamino Galvani <b.galvani@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This patch add support for ar933x serial.
Signed-off-by: NWills Wang <wills.wang@live.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NDaniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This driver works in "new" Data Mover UART mode, so
will be compatible with modern Qualcomm chips only.
Signed-off-by: NMateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

For ARM32 architecture, CONFIG_DEBUG_LL is available for early
low-level debugging (and actually UniPhier 32bit SoCs use it), but
ARM64 architecture does not support it.  Instead, CONFIG_DEBUG_UART
is available as an architecture-independent debug facility.

This commit supports it on all the UniPhier SoCs (including the new
ARMv8 SoCs), which is very useful for new SoC bringups.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

Enabling this driver requires some DT changes.
Adding DCC to root or main bus:
dcc: dcc {
	compatible = "arm,dcc";
	u-boot,dm-pre-reloc;
};

Extend alias list to link DCC:
	serial0 = &uart0;
	serial1 = &uart1;
	serial2 = &dcc;

Change stdout-path to point to dcc port.
	stdout-path = "serial2:115200n8";

Also add support for debug uart to help with early debug.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This adds PIC32 UART controller support based on driver model.
Signed-off-by: NPaul Thacker <paul.thacker@microchip.com>
Signed-off-by: NPurna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: NDaniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

xilinx_uartlite has been ported to DM, this patch makes the
xilinx-ppc405-generic and the xilinx-ppc440-generic boards use the new
DM driver.
Signed-off-by: NRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: NStefan Roese <sr@denx.de>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NMichal Simek <michal.simek@xilinx.com>

- Move config option out of board file.
- Remove uartlite address from config file
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

Add support for debug console.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

LPUART is seen on Freescale VF610 and QorIQ Layerscape devices.
Create a Kconfig option and move it to defconfig for all boards
that have this serial driver.
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Acked-by: NStefan Agner <stefan.agner@toradex.com>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds Kconfig entries to facilitate usage of pl01x as
a debug UART.
Signed-off-by: NSergey Temerkhanov <s.temerkhanov@gmail.com>
Signed-off-by: NRadha Mohan Chintakuntla <rchintakuntla@cavium.com>
Acked-by: NSimon Glass <sjg@chromium.org>

In very very space-constrained devices even the full UART driver is too
large. In this case the debug UART can still be used in some cases.

Add options to enable the UART driver in SPL and U-Boot proper. Enable both
options by default.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

Remove this c&p error from s5p driver.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

Move CONFIG_SYS_NS16550 to Kconfig, and run moveconfig.py.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>

Zap CONFIG_NS16550_SERIAL, as the unification of ns16550 drivers
is completed.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Unify serial_rockchip, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Tested-by: NAriel D'Alessandro <ariel@vanguardiasur.com.ar>
Acked-by: NSimon Glass <sjg@chromium.org>

Unify serial_ppc, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
[trini: Add TODO comment]
Signed-off-by: NTom Rini <trini@konsulko.com>

Unify serial_x86, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Add generic binding to unify ns16550 drivers. There are
several drivers using almost the same code, such as serial_dw,
serial_keystone, serial_omap, serial_ppc, serial_rockchip,
serial_tegra.c, and serial_x86. But each is platform specific.

The key difference between these drivers is the way to get
input clock frequency. With this unified approach, fixed clock
frequency should be extracted from "clock-frequency" property of
device tree blob. If this property is not available, the macro
CONFIG_SYS_NS16550_CLK will be used. It can be a constant or a
function to get clock, eg, get_serial_clock().
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NHeiko Schocher <hs@denx.de>
Acked-by: NSimon Glass <sjg@chromium.org>

Since commit 220e8021 ("nios2: convert altera_jtag_uart to
driver model"), the default debug uart was changed. Most people
use ns16550 UART, so restore it as default.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reported-by: NEzequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reported-by: NAriel D'Alessandro <ariel@vanguardiasur.com.ar>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NHeiko Schocher <hs@denx.de>
Acked-by: NSimon Glass <sjg@chromium.org>

Signed-off-by: NFrancois Retief <fgretief@spaceteq.co.za>

Add support for the debug UART to assist with early debugging. Enable it
for Zybo as an example.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Convert altera_uart to driver model.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Acked-by: NMarek Vasut <marex@denx.de>

Convert altera_jtag_uart to driver model.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Acked-by: NMarek Vasut <marex@denx.de>
Reviewed-by: NSimon Glass <sjg@chromium.org>

It is useful to see a message from the debug UART early during boot so that
you know things are working. Add an option to enable this. The message will
be displayed as soon as debug_uart_init() is called.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

Some boards need to set things up before the debug UART can be used. On
these boards a call to debug_uart_init() is insufficient. When this option
is enabled, the function board_debug_uart_init() will be called when
debug_uart_init() is called. You can put any code here that is needed to
set up the UART ready for use, such as set pin multiplexing or enable
clocks.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

It looks like this line was copy-pasted, but not modified.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Add support for the Rockchip serial device using the ns16550 driver.
This uses driver model and device tree for both SPL and U-Boot proper.
Signed-off-by: NSimon Glass <sjg@chromium.org>

SANDBOX_SERIAL depends on SANDBOX, and SANDBOX selects DM.
So, "SANDBOX_SERIAL depends on DM" is redundant.

Likewise, UNIPHIER_SERIAL depends on ARCH_UNIPHIER, and
ARCH_UNIPHIER selects DM_SERIAL.
So, "UNIPHIER_SERIAL depends on DM_SERIAL" is redundant.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NSimon Glass <sjg@chromium.org>

The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu.  Use hierarchic menu for each category.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: NTom Rini <trini@konsulko.com>

Currently the serial code assumes that there is always at least one serial
port (and panics / crashes due to null pointer dereferences when there is
none).

This makes it impossible to use u-boot on boards where there is no (debug)
serial port, because e.g. all uart pins are muxed to another function.

This commit adds a CONFIG_REQUIRE_SERIAL_CONSOLE Kconfig option, which
defaults to y (preserving existing behavior), which can be set to n on
such boards to make them work.

This commit only implements this for CONFIG_DM_SERIAL=y configs, as allowing
running without a serial port for CONFIG_DM_SERIAL=n configs is non trivial,
and is not necessary at this moment.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Add a debug UART implementation for this serial driver. It does not set up
pinmux automatically - this must be done before calling debug_uart_init().
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add a serial driver which makes use of EFI's console in/out service.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Tested on Intel Crown Bay and QEMU
Tested-by: NBin Meng <bmeng.cn@gmail.com>

Move this config option to Kconfig and tidy up.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

Move this over to Kconfig and tidy up.
Signed-off-by: NSimon Glass <sjg@chromium.org>

The business for UniPhier Soc family has been transferred from
Panasonic Corporation to Socionext Inc.

Update the SoC select menu in Kconfig.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

This UART permits different register spacing. To support the debug UART on
devices which have a spacing other than 1 byte, allow the shift value to
be specified.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Add debug UART functions to permit ns16550 to provide an early debug UART.
Try to avoid using the stack so that this can be called from assembler before
a stack is set up (at least on ARM and PowerPC).
Signed-off-by: NSimon Glass <sjg@chromium.org>

This came up in a discussion on the mailing list here:

https://patchwork.ozlabs.org/patch/384613/

My concerns at the time were:
- it doesn't need to be written in assembler
- it doesn't need to be ARM-specific

This patch provides a possible alternative. It works by allowing any serial
driver to export one init function and provide a putc() function. These
can be used to output debug data before the real serial driver is available.

This implementation does not depend on driver model, and it is possible for
it to operate without a stack on some architectures (e.g. PowerPC, ARM). It
provides the same features as the ARM-specific debug.S but with more UART
and architecture support.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Expand the help messages for each driver. Add missing Kconfig for I2C,
SPI flash and thermal.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>