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Simon Glass 2f964aa7b1 serial: Support an early UART for debugging 
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: Simon Glass <sjg@chromium.org>
2015-02-19 06:20:25 -07:00
..
altera_jtag_uart.c nios2: divide nios2-io.h into each specific drivers and remove it 2014-08-30 17:48:43 +08:00
altera_uart.c nios2: divide nios2-io.h into each specific drivers and remove it 2014-08-30 17:48:43 +08:00
arm_dcc.c serial: arm_dcc: Convert to use default_serial_puts 2013-08-19 09:44:28 -04:00
atmel_usart.c dm: at91: Add driver model support for the serial driver 2014-11-21 08:09:58 +01:00
atmel_usart.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
Kconfig serial: Support an early UART for debugging 2015-02-19 06:20:25 -07:00
lpc32xx_hsuart.c serial: lpc32xx: send CR before LF 2013-12-13 09:14:34 -05:00
Makefile powerpc: Add serial driver for driver model 2015-02-12 10:35:31 -07:00
mcfuart.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
mxs_auart.c serial: mxs_auart: Staticize local functions 2013-11-08 15:25:13 -05:00
ns16550.c serial: ns16550: Support ns16550 compatible pci uart devices 2015-01-13 07:24:57 -08:00
opencores_yanu.c serial: move nios2-yanu.h into opencores_yanu driver 2014-08-30 17:48:43 +08:00
sandbox.c sandbox: serial: Support a coloured console 2014-09-10 13:00:00 -06:00
serial-uclass.c dm: Add support for all targets which requires MANUAL_RELOC 2015-02-12 15:17:29 -07:00
serial.c serial: add prototypes for init functions 2014-11-04 15:01:11 -05:00
serial_arc.c serial: arc: Convert to use default_serial_puts 2014-02-21 09:50:12 -05:00
serial_bfin.c blackfin: Move blackfin serial driver out of blackfin arch folder. 2013-05-13 16:30:26 +08:00
serial_dw.c dm: sunxi: Add support for serial using driver model 2014-11-05 13:09:58 +01:00
serial_imx.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
serial_ks8695.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
serial_lpuart.c Merge branch 'master' of git://git.denx.de/u-boot-arm 2014-09-17 18:01:04 -04:00
serial_max3100.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
serial_mxc.c dm: move platform data headers to include/dm/platform_data 2014-10-23 21:43:07 -06:00
serial_ns16550.c serial: add static directive to local functions 2014-10-23 21:43:08 -06:00
serial_omap.c dm: omap: serial: Add driver model support 2014-10-23 19:29:07 -06:00
serial_pl01x.c dm: serial_pl01x: Add missing private data size 2014-12-11 13:18:41 -07:00
serial_pl01x_internal.h dm: serial: Tidy up the pl01x driver 2014-10-22 10:36:57 -06:00
serial_ppc.c powerpc: Add serial driver for driver model 2015-02-12 10:35:31 -07:00
serial_pxa.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
serial_s3c24x0.c serial: add static directive to local functions 2014-10-23 21:43:08 -06:00
serial_s5p.c dm: exynos: Move serial to driver model 2014-10-22 10:36:45 -06:00
serial_sa1100.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
serial_sh.c dm: sh: serial: Add support driver model 2015-02-12 15:17:17 -07:00
serial_sh.h dm: sh: serial: Add support driver model 2015-02-12 15:17:17 -07:00
serial_tegra.c dm: tegra: Add platform data for the SPL uart 2014-11-21 08:14:02 +01:00
serial_uniphier.c serial: UniPhier: support OF configuration 2014-11-28 02:21:01 +09:00
serial_x86.c x86: Use ePAPR defined properties for x86-uart 2015-01-13 07:24:57 -08:00
serial_xuartlite.c serial: uartlite: Reset RX/TX in init 2014-02-04 16:48:57 +01:00
serial_zynq.c serial: Extend structure comments with register offset 2015-01-26 08:55:59 +01:00
usbtty.c linux/kernel.h: sync min, max, min3, max3 macros with Linux 2014-11-23 06:48:30 -05:00
usbtty.h omap: clean-up dead configs 2014-08-09 11:17:04 -04:00