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drivers: console: uart_mux: Initial UART muxing support

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Create support for muxed UARTs which are attached to a real
UART and which use GSM 07.10 muxing protocol to create virtual
channels that can be run on top of the real UART.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2020-04-01 12:47:53 +03:00
commit 420b195b5e
7 changed files with 1049 additions and 0 deletions
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10
include/linker/common-ram.ld
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@ -165,6 +165,16 @@
__net_l2_data_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
#if defined(CONFIG_UART_MUX)
SECTION_DATA_PROLOGUE(uart_mux,,SUBALIGN(4))
{
__uart_mux_start = .;
*(".uart_mux.*")
KEEP(*(SORT_BY_NAME(".uart_mux.*")))
__uart_mux_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
#endif
#if defined(CONFIG_USB_DEVICE_STACK)
SECTION_DATA_PROLOGUE(usb_descriptor,,SUBALIGN(1))
{