Re: [PATCH] firmware-zynqmp: port from linux

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On Thu, Feb 14, 2019 at 02:35:00PM +0000, Thomas Hämmerle wrote:
> Hi Sascha,
> 
> On 12.02.19 09:31, Sascha Hauer wrote:
> > Hi Thomas,
> > 
> > On Mon, Feb 11, 2019 at 02:10:40PM +0000, Thomas Hämmerle wrote:
> >> From: Thomas Haemmerle <thomas.haemmerle@xxxxxxxxxxxxxx>
> >>
> >> Port Xilinx Zynq MPSoC Firmware layer driver from linux.
> >>
> >> Signed-off-by: Thomas Haemmerle <thomas.haemmerle@xxxxxxxxxxxxxx>
> >> ---
> >>   arch/arm/Kconfig                                   |   1 +
> >>   arch/arm/mach-zynqmp/Makefile                      |   2 +-
> >>   arch/arm/mach-zynqmp/firmware-zynqmp.c             | 601 +++++++++++++++++++++
> >>   .../arm/mach-zynqmp/include/mach/firmware-zynqmp.h |  66 +++
> >>   4 files changed, 669 insertions(+), 1 deletion(-)
> >>   create mode 100644 arch/arm/mach-zynqmp/firmware-zynqmp.c
> >>   create mode 100644 arch/arm/mach-zynqmp/include/mach/firmware-zynqmp.h
> >>
> >> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> >> index c1f385b..fdbe5b7 100644
> >> --- a/arch/arm/Kconfig
> >> +++ b/arch/arm/Kconfig
> >> @@ -250,6 +250,7 @@ config ARCH_ZYNQMP
> >>   	select CPU_V8
> >>   	select HAS_DEBUG_LL
> >>   	select HAVE_PBL_MULTI_IMAGES
> >> +	select ARM_SMCCC
> >>   	select COMMON_CLK
> >>   	select COMMON_CLK_OF_PROVIDER
> >>   	select CLKDEV_LOOKUP
> >> diff --git a/arch/arm/mach-zynqmp/Makefile b/arch/arm/mach-zynqmp/Makefile
> >> index c601374..021efc9 100644
> >> --- a/arch/arm/mach-zynqmp/Makefile
> >> +++ b/arch/arm/mach-zynqmp/Makefile
> >> @@ -1,2 +1,2 @@
> >>   # SPDX-License-Identifier: GPL-2.0-or-later
> >> -obj- := __dummy__.o
> >> +obj-y += firmware-zynqmp.o
> >> diff --git a/arch/arm/mach-zynqmp/firmware-zynqmp.c b/arch/arm/mach-zynqmp/firmware-zynqmp.c
> > 
> > 
> > Maybe drivers/firmware/ would be a more appropriate directory to put
> > this driver in.
> 
> I was not sure where to put the this driver in:
> 
> In linux drivers/firmware is the location for drivers which communicate
> with a firmware (like this one).
> 
> In barebox, this directory contains drivers to load firmware to devices
> (socfpga.c for example). Since I will also create a driver to load the
> PL (programmable logic) of ZynqMP which I will place in
> drivers/firmware, I decided to put this driver to arch/arm.

Ok, then leave it there for now. I don't have a better idea either.

Sascha

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