linux-kernel - RE: [PATCH 0/7] towards QE support on ARM

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Date:   Fri, 18 Oct 2019 20:16:42 +0000
From:   Leo Li <leoyang.li@....com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Qiang Zhao <qiang.zhao@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, Timur Tabi <timur@...nel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
Subject: RE: [PATCH 0/7] towards QE support on ARM



> -----Original Message-----
> From: Rasmus Villemoes <linux@...musvillemoes.dk>
> Sent: Friday, October 18, 2019 7:52 AM
> To: Qiang Zhao <qiang.zhao@....com>; Leo Li <leoyang.li@....com>; Greg
> Kroah-Hartman <gregkh@...uxfoundation.org>; Jiri Slaby
> <jslaby@...e.com>; Timur Tabi <timur@...nel.org>; linuxppc-
> dev@...ts.ozlabs.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org; linux-serial@...r.kernel.org
> Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
> Subject: [PATCH 0/7] towards QE support on ARM
> 
> There have been several attempts in the past few years to allow building the
> QUICC engine drivers for platforms other than PPC. This is (the beginning of)
> yet another attempt. I hope I can get someone to pick up these relatively
> trivial patches (I _think_ they shouldn't change functionality at all), and then
> I'll continue slowly working towards removing the PPC32 dependency for
> CONFIG_QUICC_ENGINE.

Hi Rasmus,

I don't fully understand the motivation of this work.  As far as I know the QUICC ENGINE is only used on PowerPC based SoCs.  Can you give an example on how is it used on ARM system?

> 
> Tested on an MPC8309-derived board.

MPC8309 is also PPC based.

> 
> Rasmus Villemoes (7):
>   soc: fsl: qe: remove space-before-tab
>   soc: fsl: qe: drop volatile qualifier of struct qe_ic::regs
>   soc: fsl: qe: avoid ppc-specific io accessors
>   soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic
>   serial: make SERIAL_QE depend on PPC32
>   serial: ucc_uart.c: explicitly include asm/cpm.h
>   soc/fsl/qe/qe.h: remove include of asm/cpm.h
> 
>  drivers/soc/fsl/qe/gpio.c     | 30 ++++++++--------
>  drivers/soc/fsl/qe/qe.c       | 44 +++++++++++------------
>  drivers/soc/fsl/qe/qe_ic.c    |  8 ++---
>  drivers/soc/fsl/qe/qe_ic.h    |  2 +-
>  drivers/soc/fsl/qe/qe_io.c    | 40 ++++++++++-----------
>  drivers/soc/fsl/qe/qe_tdm.c   |  8 ++---
>  drivers/soc/fsl/qe/ucc.c      | 12 +++----
>  drivers/soc/fsl/qe/ucc_fast.c | 66 ++++++++++++++++++-----------------
>  drivers/soc/fsl/qe/ucc_slow.c | 38 ++++++++++----------
>  drivers/soc/fsl/qe/usb.c      |  2 +-
>  drivers/tty/serial/Kconfig    |  1 +
>  drivers/tty/serial/ucc_uart.c |  1 +
>  include/soc/fsl/qe/qe.h       |  1 -
>  13 files changed, 126 insertions(+), 127 deletions(-)
> 
> --
> 2.20.1