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serial: Add imx uart driver shim

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Adds a shim layer around the imx uart driver to adapt it to the Zephyr
serial interface.

Modem mode was introduce to control it as DCE and DTE and can be
configured in the device tree:
    modem-mode:
        type: int
        category: required
        description: Set the UART Port to modem mode 0 (dce) 1 (dte)
        generation: define

For now only the UART 2 was tested.

Signed-off-by: Diego Sueiro <diego.sueiro@gmail.com>
This commit is contained in:
Diego Sueiro 2018-03-14 18:36:53 +00:00 • committed by Maureen Helm
commit 346165b2e8
6 changed files with 660 additions and 0 deletions
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73
drivers/serial/Kconfig.imx Normal file
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# Kconfig - iMX7 M4 UART
#
# Copyright (c) 2018, NXP
#
# SPDX-License-Identifier: Apache-2.0
#
menuconfig UART_IMX
bool "NXP i.MX7 family processor UART driver"
default n
select SERIAL_HAS_DRIVER
select SERIAL_SUPPORT_INTERRUPT
depends on HAS_IMX_HAL
help
This option enables the UART driver for NXP i.MX7
family processors.
config UART_IMX_UART_1
bool "Enable NXP i.MX7 UART1 Port"
default n
depends on UART_IMX
help
Enable support for UART1 port in the driver. Say y here
if you want to use UART1 device.
config UART_IMX_UART_2
bool "Enable NXP i.MX7 UART2 Port"
default n
depends on UART_IMX
help
Enable support for UART2 port in the driver. Say y here
if you want to use UART2 device.
config UART_IMX_UART_3
bool "Enable NXP i.MX7 UART3 Port"
default n
depends on UART_IMX
help
Enable support for UART3 port in the driver. Say y here
if you want to use UART3 device.
config UART_IMX_UART_4
bool "Enable NXP i.MX7 UART4 Port"
default n
depends on UART_IMX
help
Enable support for UART4 port in the driver. Say y here
if you want to use UART4 device.
config UART_IMX_UART_5
bool "Enable NXP i.MX7 UART5 Port"
default n
depends on UART_IMX
help
Enable support for UART5 port in the driver. Say y here
if you want to use UART5 device.
config UART_IMX_UART_6
bool "Enable NXP i.MX7 UART6 Port"
default n
depends on UART_IMX
help
Enable support for UART6 port in the driver. Say y here
if you want to use UART6 device.
config UART_IMX_UART_7
bool "Enable NXP i.MX7 UART7 Port"
default n
depends on UART_IMX
help
Enable support for UART7 port in the driver. Say y here
if you want to use UART7 device.