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From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Leo Li <leoyang.li@nxp.com>, Qiang Zhao <qiang.zhao@nxp.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jslaby@suse.com>, Timur Tabi <timur@kernel.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>
Subject: Re: [PATCH 0/7] towards QE support on ARM
Date: Fri, 18 Oct 2019 22:52:03 +0200	[thread overview]
Message-ID: <e02fa027-9c78-3272-d2d7-7ad2b0ed3ab0@rasmusvillemoes.dk> (raw)
In-Reply-To: <VE1PR04MB6687DA0268FAF03D3E77A23B8F6C0@VE1PR04MB6687.eurprd04.prod.outlook.com>

On 18/10/2019 22.16, Leo Li wrote:
> 
>>
>> 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. 

Hm, you're not the Leo Li that participated in this thread
<https://lore.kernel.org/lkml/AM3PR04MB11857AE8D2B0BE56121B97D391C90@AM3PR04MB1185.eurprd04.prod.outlook.com/T/#u>?


 Can you give an example on how is it used on ARM system?

LS1021A, for example, which is the one I'm aiming for getting fully
supported in mainline.
<https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/layerscape-communication-process/qoriq-layerscape-1021a-dual-core-communications-processor-with-lcd-controller:LS1021A>

The forks at https://github.com/qoriq-open-source/linux.git have various
degrees of support (grep for commits saying stuff like "remove PPCisms"
- some versions can be found on
<https://lore.kernel.org/lkml/?q=remove+ppcisms>). Our current kernel is
based on commits from the now-vanished 4.1 branch, and unfortunately at
least the 4.14 branch (LSDK-18.06-V4.14) trivially doesn't build on ARM,
despite the PPC32 dependency having been removed from CONFIG_QUICC_ENGINE.

>>
>> Tested on an MPC8309-derived board.
> 
> MPC8309 is also PPC based.

True, of course. This is just some first few steps, and I'm not claiming
that this is sufficient to make the QE drivers build on ARM yet. But I
have a customer with both mpc8309-based and ls1021a-based platforms, and
they want to run the same, as-close-to-mainline-as-possible, kernel on
both. So I will take a piecemeal approach, and try to make sure I don't
break the ppc boards in the process (just building and booting one board
is of course not sufficient, but better than nothing). Once I get to
actually build some of the QE drivers for ARM, I'll of course also test
them.

Rasmus

  reply	other threads:[~2019-10-18 20:52 UTC|newest]

Thread overview: 120+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-18 12:52 [PATCH 0/7] towards QE support on ARM Rasmus Villemoes
2019-10-18 12:52 ` [PATCH 1/7] soc: fsl: qe: remove space-before-tab Rasmus Villemoes
2019-10-18 12:57   ` Christophe Leroy
2019-10-18 12:52 ` [PATCH 2/7] soc: fsl: qe: drop volatile qualifier of struct qe_ic::regs Rasmus Villemoes
2019-10-18 13:01   ` Christophe Leroy
2019-10-18 12:52 ` [PATCH 3/7] soc: fsl: qe: avoid ppc-specific io accessors Rasmus Villemoes
2019-10-22 15:01   ` Christophe Leroy
2019-10-23  7:08     ` Rasmus Villemoes
2019-10-18 12:52 ` [PATCH 4/7] soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic Rasmus Villemoes
2019-10-18 16:08   ` Christoph Hellwig
2019-10-24  8:32     ` Rasmus Villemoes
2019-10-30  0:36       ` Michael Ellerman
2019-10-18 12:52 ` [PATCH 5/7] serial: make SERIAL_QE depend on PPC32 Rasmus Villemoes
2019-10-18 12:52 ` [PATCH 6/7] serial: ucc_uart.c: explicitly include asm/cpm.h Rasmus Villemoes
2019-10-18 12:52 ` [PATCH 7/7] soc/fsl/qe/qe.h: remove include of asm/cpm.h Rasmus Villemoes
2019-10-18 20:16 ` [PATCH 0/7] towards QE support on ARM Leo Li
2019-10-18 20:52   ` Rasmus Villemoes [this message]
2019-10-18 21:52     ` Li Yang
2019-10-21  8:44       ` Rasmus Villemoes
2019-10-21 22:11         ` Li Yang
2019-10-22  2:24           ` Qiang Zhao
2019-10-22 10:17             ` Rasmus Villemoes
2019-10-23  2:52               ` Qiang Zhao
2019-10-24 20:02                 ` Li Yang
2019-10-22 10:12           ` Rasmus Villemoes
2019-10-22 15:06 ` Christophe Leroy
2019-10-25 12:40 ` [PATCH v2 00/23] QUICC Engine " Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 01/23] soc: fsl: qe: remove space-before-tab Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 02/23] soc: fsl: qe: drop volatile qualifier of struct qe_ic::regs Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 03/23] soc: fsl: qe: avoid ppc-specific io accessors Rasmus Villemoes
2019-10-29  7:43     ` Christophe Leroy
2019-10-29  8:43       ` ppc: inlining iowrite32be and friends (was: Re: [PATCH v2 03/23] soc: fsl: qe: avoid ppc-specific io accessors) Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 04/23] soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 05/23] soc: fsl: qe: qe.c: guard use of pvr_version_is() with CONFIG_PPC32 Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 06/23] soc: fsl: qe: avoid tail comments in qe_ic.h Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 07/23] soc: fsl: qe: merge qe_ic.h into qe_ic.c Rasmus Villemoes
2019-10-30 10:24     ` Christophe Leroy
2019-10-25 12:40   ` [PATCH v2 08/23] soc: fsl: qe: drop unneeded #includes Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 09/23] soc: fsl: qe: move qe_ic_cascade_* functions to qe_ic.c Rasmus Villemoes
2019-10-30 10:45     ` Christophe Leroy
2019-10-25 12:40   ` [PATCH v2 10/23] soc: fsl: qe: use qe_ic_cascade_{low,high}_mpic also on 83xx Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 11/23] soc: fsl: qe: rename qe_ic_cascade_low_mpic -> qe_ic_cascade_low Rasmus Villemoes
2019-10-30 10:47     ` Christophe Leroy
2019-10-25 12:40   ` [PATCH v2 12/23] soc: fsl: qe: drop assign-only high_active in qe_ic_init Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 13/23] soc: fsl: qe: remove pointless sysfs registration in qe_ic.c Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 14/23] soc: fsl: qe: move calls of qe_ic_init out of arch/powerpc/ Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 15/23] powerpc/83xx: remove mpc83xx_ipic_and_qe_init_IRQ Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 16/23] powerpc/85xx: remove mostly pointless mpc85xx_qe_init() Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 17/23] soc: fsl: qe: make qe_ic_cascade_* static Rasmus Villemoes
2019-10-30 10:50     ` Christophe Leroy
2019-10-30 12:52       ` Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 18/23] soc: fsl: qe: remove unused qe_ic_set_* functions Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 19/23] net: ethernet: freescale: make UCC_GETH explicitly depend on PPC32 Rasmus Villemoes
2019-10-30 10:55     ` Christophe Leroy
2019-10-25 12:40   ` [PATCH v2 20/23] serial: make SERIAL_QE " Rasmus Villemoes
2019-10-29 22:44     ` Leo Li
2019-10-29 22:50       ` Rasmus Villemoes
2019-10-30 10:56     ` Christophe Leroy
2019-10-25 12:40   ` [PATCH v2 21/23] serial: ucc_uart.c: explicitly include asm/cpm.h Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 22/23] soc/fsl/qe/qe.h: remove include of asm/cpm.h Rasmus Villemoes
2019-10-25 12:40   ` [PATCH v2 23/23] soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE Rasmus Villemoes
2019-10-28 14:17     ` kbuild test robot
2019-10-28 14:49     ` kbuild test robot
2019-10-29  0:50     ` kbuild test robot
2019-11-01 12:41 ` [PATCH v3 00/36] QUICC Engine support on ARM Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 01/36] soc: fsl: qe: remove space-before-tab Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 02/36] soc: fsl: qe: drop volatile qualifier of struct qe_ic::regs Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 03/36] soc: fsl: qe: rename qe_(clr/set/clrset)bit* helpers Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 04/36] soc: fsl: qe: introduce qe_io{read,write}* wrappers Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 05/36] soc: fsl: qe: avoid ppc-specific io accessors Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 06/36] soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 07/36] soc: fsl: qe: qe.c: guard use of pvr_version_is() with CONFIG_PPC32 Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 08/36] soc: fsl: qe: drop unneeded #includes Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 09/36] soc: fsl: qe: drop assign-only high_active in qe_ic_init Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 10/36] soc: fsl: qe: remove pointless sysfs registration in qe_ic.c Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 11/36] soc: fsl: qe: use qe_ic_cascade_{low,high}_mpic also on 83xx Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 12/36] soc: fsl: qe: move calls of qe_ic_init out of arch/powerpc/ Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 13/36] powerpc/83xx: remove mpc83xx_ipic_and_qe_init_IRQ Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 14/36] powerpc/85xx: remove mostly pointless mpc85xx_qe_init() Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 15/36] soc: fsl: qe: move qe_ic_cascade_* functions to qe_ic.c Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 16/36] soc: fsl: qe: rename qe_ic_cascade_low_mpic -> qe_ic_cascade_low Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 17/36] soc: fsl: qe: remove unused qe_ic_set_* functions Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 18/36] soc: fsl: qe: don't use NO_IRQ in qe_ic.c Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 19/36] soc: fsl: qe: make qe_ic_get_{low,high}_irq static Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 20/36] soc: fsl: qe: simplify qe_ic_init() Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 21/36] soc: fsl: qe: merge qe_ic.h headers into qe_ic.c Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 22/36] soc: fsl: qe: qe.c: use of_property_read_* helpers Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 23/36] soc: fsl: qe: qe_io.c: don't open-code of_parse_phandle() Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 24/36] soc: fsl: qe: qe_io.c: access device tree property using be32_to_cpu Rasmus Villemoes
2019-11-01 12:41   ` [PATCH v3 25/36] soc: fsl: qe: qe_io.c: use of_property_read_u32() in par_io_init() Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 26/36] soc: fsl: move cpm.h from powerpc/include/asm to include/soc/fsl Rasmus Villemoes
2019-11-01 16:18     ` Christophe Leroy
2019-11-01 16:59       ` Scott Wood
2019-11-01 12:42   ` [PATCH v3 27/36] soc/fsl/qe/qe.h: update include path for cpm.h Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 28/36] serial: ucc_uart: explicitly include soc/fsl/cpm.h Rasmus Villemoes
2019-11-01 16:19     ` Christophe Leroy
2019-11-04  7:38       ` Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 29/36] serial: ucc_uart: replace ppc-specific IO accessors Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 30/36] serial: ucc_uart: factor out soft_uart initialization Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 31/36] serial: ucc_uart: stub out soft_uart_init for !CONFIG_PPC32 Rasmus Villemoes
2019-11-01 16:27     ` Christophe Leroy
2019-11-04  8:03       ` Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 32/36] serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe() Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 33/36] serial: ucc_uart: access __be32 field using be32_to_cpu Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 34/36] net: ethernet: freescale: make UCC_GETH explicitly depend on PPC32 Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 35/36] net/wan: make FSL_UCC_HDLC " Rasmus Villemoes
2019-11-01 16:29     ` Christophe Leroy
2019-11-01 22:31       ` Leo Li
2019-11-04  8:38         ` Rasmus Villemoes
2019-11-04 20:56           ` Li Yang
2019-11-05 22:46             ` Rasmus Villemoes
2019-11-05 23:46               ` Li Yang
2019-11-05  6:16           ` Qiang Zhao
2019-11-06  7:56             ` Rasmus Villemoes
2019-11-01 12:42   ` [PATCH v3 36/36] soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE Rasmus Villemoes
2019-11-02 17:39     ` kbuild test robot
2019-11-14 23:26     ` kbuild test robot
2019-11-14 23:26     ` [RFC PATCH] soc: fsl: qe: qe_uart_set_mctrl() can be static kbuild test robot
2019-11-15 13:31     ` [PATCH v3 36/36] soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE kbuild test robot
2019-11-15 13:42       ` Rasmus Villemoes

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