Move the pinctrl dtsi (mimx8ml8dvnlz-pinctrl.dtsi) from board dts to
_uart overlay since, now, for nxp_adsp_imx8m, this is used only with
uart support for certain samples.
This also fixes a build error on SOF, where we don't take the nxp_hal
and the dtsi cannot be found.
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Enable UART on the DSP from the i.MX8MP target:
- add corresponding nodes in dtsi and dts;
- create a dts overlay for uart;
- add a config fragment for uart and console configuration.
So, in order to compile an application and enable UART
a user must run west build using DTC_OVERLAY_FILE and CONF_FILE.
Here's an example for hello_world:
west build -p always -b nxp_adsp_imx8m samples/hello_world/
-DDTC_OVERLAY_FILE="boards/xtensa/nxp_adsp_imx8m/
nxp_adsp_imx8m_uart.overlay" -DCONF_FILE="boards/xtensa/nxp_adsp_imx8m/
nxp_adsp_imx8m_uart.conf"
For other applications, like SOF, where we don't need UART, we simply run:
west build -p always -b nxp_adsp_imx8m ../modules/audio/sof/ --
-DTOOLCHAIN=/opt/zephyr-sdk-0.15.2/xtensa-nxp_imx8m_adsp_zephyr-elf/
bin/xtensa-nxp_imx8m_adsp_zephyr-elf -DINIT_CONFIG=imx8m_defconfig
The nxp_adsp_imx8m is using the nxp_imx_iuart driver.
For now, is used in poll mode.
Next step is to enable the interrupt controller in
DSP and use the interrupt driver UART.
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
