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SubjectRE: [PATCH 0/6] tty: serial: lpuart: add imx7ulp support
From: Dong Aisheng <> Sent: Tuesday, May 09, 2017 3:51 PM
>;; Andy Duan
><>;; Mingkai Hu
><>; Y.B. Lu <>; A.S. Dong
>Subject: [PATCH 0/6] tty: serial: lpuart: add imx7ulp support
>This patch series mainly intends to add imx7ulp support which is also using FSL
>The lpuart in imx7ulp is basically the same as ls1021a. It's also
>32 bit width register, but unlike ls1021a, it's little endian.
>Besides that, imx7ulp lpuart has a minor different register layout from ls1021a
>that it has four extra registers (verid, param, global,
>pincfg) located at the beginning of register map, which are currently not used
>by the driver and less to be used later.
>Furthermore, this patch serial also add a new more accurate baud rate
>calculation method as MX7ULP can't divide a suitable baud rate with the
>default setting.
>Currently the new baud rate calculation is only enabled on MX7ULP.
>However, i guess the Layerscape may also be able to use it as there seems to
>be no difference in baud rate setting register after checking the Layerscape
>Reference Manual.
>As i don't have Layerscape boards, i can't test it, so i only enable it for MX7ULP
>by default to avoid a potential break.
>I copied LayerScape guys in this series and hope they can help test later.
>If it works on Layerscape as well, then they can switch to the new setting too
>and totally remove the old stuff.
>Dong Aisheng (6):
> tty: serial: lpuart: introduce lpuart_soc_data to represent SoC
> property
> tty: serial: lpuart: add little endian 32 bit register support
> dt-bindings: serial: fsl-lpuart: add i.MX7ULP support
> tty: serial: lpuart: add imx7ulp support
> tty: serial: lpuart: add earlycon support for imx7ulp
> tty: serial: lpuart: add a more accurate baud rate calculation method
> .../devicetree/bindings/serial/fsl-lpuart.txt | 2 +
> drivers/tty/serial/fsl_lpuart.c | 149 ++++++++++++++++++---
> 2 files changed, 136 insertions(+), 15 deletions(-)

The series looks fine.

Acked-by: Fugang Duan <>

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