linux-kernel - Re: [PATCH v2] QE: move qe code from arch/powerpc to drivers/soc

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Date:	Thu, 4 Sep 2014 17:46:49 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Zhao Qiang <B45475@...escale.com>
CC:	<leoli@...escale.com>, <linuxppc-dev@...ts.ozlabs.org>,
	<B07421@...escale.com>, <R63061@...escale.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] QE: move qe code from arch/powerpc to drivers/soc

On Thu, 2014-09-04 at 13:06 +0800, Zhao Qiang wrote:
> LS1 is arm cpu and it has qe ip block.
> move qe code from platform directory to public directory.
> 
> QE is an IP block integrates several comunications peripheral
> controllers. It can implement a variety of applications, such
> as uart, usb and tdm and so on.
> 
> Signed-off-by: Zhao Qiang <B45475@...escale.com>
> ---
> Changes for v2:
> 	- mv code to drivers/soc

Who will be the maintainer of this code once it lives in drivers/soc,
especially once it is no longer used only by PPC?

>  44 files changed, 113 insertions(+), 113 deletions(-)
>  delete mode 100644 arch/powerpc/sysdev/qe_lib/Kconfig
>  create mode 100644 drivers/soc/qe/Kconfig
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/Makefile (100%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/gpio.c (99%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/qe.c (99%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/qe_ic.c (99%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/qe_ic.h (98%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/qe_io.c (99%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/ucc.c (98%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/ucc_fast.c (98%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/ucc_slow.c (98%)
>  rename {arch/powerpc/sysdev/qe_lib => drivers/soc/qe}/usb.c (96%)

drivers/soc/fsl-qe

> diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
> index 0f7c447..5da1a482 100644
> --- a/drivers/soc/Makefile
> +++ b/drivers/soc/Makefile
> @@ -3,3 +3,5 @@
>  #
>  
>  obj-$(CONFIG_ARCH_QCOM)		+= qcom/
> +
> +obj-$(CONFIG_QUICC_ENGINE)     += qe/

Please keep the file consistent regarding tabs versus spaces.

Plus, why do you need a newline between them?

> diff --git a/drivers/soc/qe/Kconfig b/drivers/soc/qe/Kconfig
> new file mode 100644
> index 0000000..8b03ca2
> --- /dev/null
> +++ b/drivers/soc/qe/Kconfig
> @@ -0,0 +1,45 @@
> +#
> +# QE Communication options
> +#
> +config QUICC_ENGINE
> +	bool "Freescale QUICC Engine (QE) Support"
> +	depends on FSL_SOC && PPC32
> +	select PPC_LIB_RHEAP
> +	select CRC32
> +	help
> +	  The QUICC Engine (QE) is a new generation of communications
> +	  coprocessors on Freescale embedded CPUs (akin to CPM in older chips).
> +	  Selecting this option means that you wish to build a kernel
> +	  for a machine with a QE coprocessor.
> +
> +config QE_GPIO
> +	bool "QE GPIO support"
> +	depends on QUICC_ENGINE
> +	select ARCH_REQUIRE_GPIOLIB
> +	help
> +	  Say Y here if you're going to use hardware that connects to the
> +	  QE GPIOs.
> +
> +config UCC_SLOW
> +	bool
> +	default y if SERIAL_QE
> +	help
> +	  This option provides qe_lib support to UCC slow
> +	  protocols: UART, BISYNC, QMC
> +
> +config UCC_FAST
> +	bool
> +	default y if UCC_GETH
> +	help
> +	  This option provides qe_lib support to UCC fast
> +	  protocols: HDLC, Ethernet, ATM, transparent
> +
> +config UCC
> +	bool
> +	default y if UCC_FAST || UCC_SLOW
> +
> +config QE_USB
> +	bool
> +	default y if USB_FSL_QE
> +	help
> +	  QE USB Controller support

First could we give these names better namespacing?

-Scott


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