Re: [PATCH v2 6/8] firmware: arm_scmi: Make OPTEE transport a standalone driver

[Cristian Marussi <cristian.marussi@arm.com>]

On Thu, Jul 11, 2024 at 12:57:46PM +0000, Peng Fan wrote:
> > Subject: [PATCH v2 6/8] firmware: arm_scmi: Make OPTEE transport a
> > standalone driver
> > 
> > Make SCMI OPTEE transport a standalone driver that can be optionally
> > loaded as a module.
> > 
> > CC: Etienne Carriere <etienne.carriere@foss.st.com>
> > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
> > ---
> > v1 --> v2
> > - handle platform_driver_register() failures
> > ---
> >  drivers/firmware/arm_scmi/Kconfig             |  6 +-
> >  drivers/firmware/arm_scmi/Makefile            |  2 +-
> >  drivers/firmware/arm_scmi/common.h            |  3 -
> >  drivers/firmware/arm_scmi/driver.c            |  3 -
> >  .../{optee.c => scmi_transport_optee.c}       | 91 ++++++++++---------
> >  5 files changed, 52 insertions(+), 53 deletions(-)  rename
> > drivers/firmware/arm_scmi/{optee.c => scmi_transport_optee.c} (90%)
> > 
> > diff --git a/drivers/firmware/arm_scmi/Kconfig
> > b/drivers/firmware/arm_scmi/Kconfig
> > index a4d44ef8bf45..def7e3f09356 100644
> > --- a/drivers/firmware/arm_scmi/Kconfig
> > +++ b/drivers/firmware/arm_scmi/Kconfig
> > @@ -89,8 +89,8 @@ config ARM_SCMI_TRANSPORT_MAILBOX
> >  	  will be called scmi_transport_mailbox.
> > 
> >  config ARM_SCMI_TRANSPORT_OPTEE
> > -	bool "SCMI transport based on OP-TEE service"
> > -	depends on OPTEE=y || OPTEE=ARM_SCMI_PROTOCOL
> > +	tristate "SCMI transport based on OP-TEE service"
> > +	depends on OPTEE
> >  	select ARM_SCMI_HAVE_TRANSPORT
> >  	select ARM_SCMI_HAVE_SHMEM
> >  	select ARM_SCMI_HAVE_MSG
> > @@ -100,6 +100,8 @@ config ARM_SCMI_TRANSPORT_OPTEE
> > 
> >  	  If you want the ARM SCMI PROTOCOL stack to include
> > support for a
> >  	  transport based on OP-TEE SCMI service, answer Y.
> > +	  This driver can also be built as a module.  If so, the module
> > +	  will be called scmi_transport_optee.
> > 
> >  config ARM_SCMI_TRANSPORT_SMC
> >  	tristate "SCMI transport based on SMC"
> > diff --git a/drivers/firmware/arm_scmi/Makefile
> > b/drivers/firmware/arm_scmi/Makefile
> > index 6868a47fa4ab..b04119ce972f 100644
> > --- a/drivers/firmware/arm_scmi/Makefile
> > +++ b/drivers/firmware/arm_scmi/Makefile
> > @@ -7,13 +7,13 @@ scmi-driver-
> > $(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT) += raw_mode.o
> >  scmi-transport-$(CONFIG_ARM_SCMI_HAVE_SHMEM) = shmem.o
> >  scmi-transport-$(CONFIG_ARM_SCMI_HAVE_MSG) += msg.o
> >  scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_VIRTIO) += virtio.o
> > -scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) += optee.o
> > scmi-protocols-y := base.o clock.o perf.o power.o reset.o sensors.o
> > system.o voltage.o powercap.o  scmi-protocols-y += pinctrl.o  scmi-
> > module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y)
> > 
> >  obj-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) +=
> > scmi_transport_smc.o
> >  obj-$(CONFIG_ARM_SCMI_TRANSPORT_MAILBOX) +=
> > scmi_transport_mailbox.o
> > +obj-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) +=
> > scmi_transport_optee.o
> > 
> >  obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o
> >  obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o diff --git
> > a/drivers/firmware/arm_scmi/common.h
> > b/drivers/firmware/arm_scmi/common.h
> > index edb786cde25c..0ce1d804b3fc 100644
> > --- a/drivers/firmware/arm_scmi/common.h
> > +++ b/drivers/firmware/arm_scmi/common.h
> > @@ -289,9 +289,6 @@ int
> > scmi_xfer_raw_wait_for_message_response(struct scmi_chan_info
> > *cinfo,  #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO  extern const
> > struct scmi_desc scmi_virtio_desc;  #endif -#ifdef
> > CONFIG_ARM_SCMI_TRANSPORT_OPTEE -extern const struct
> > scmi_desc scmi_optee_desc; -#endif
> > 
> >  void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr,
> > void *priv);
> > 
> > diff --git a/drivers/firmware/arm_scmi/driver.c
> > b/drivers/firmware/arm_scmi/driver.c
> > index b14c5326930a..67b416c7f2f5 100644
> > --- a/drivers/firmware/arm_scmi/driver.c
> > +++ b/drivers/firmware/arm_scmi/driver.c
> > @@ -3251,9 +3251,6 @@ ATTRIBUTE_GROUPS(versions);
> > 
> >  /* Each compatible listed below must have descriptor associated with
> > it */  static const struct of_device_id scmi_of_match[] = { -#ifdef
> > CONFIG_ARM_SCMI_TRANSPORT_OPTEE
> > -	{ .compatible = "linaro,scmi-optee", .data =
> > &scmi_optee_desc },
> > -#endif
> >  #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO
> >  	{ .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc},
> > #endif diff --git a/drivers/firmware/arm_scmi/optee.c
> > b/drivers/firmware/arm_scmi/scmi_transport_optee.c
> > similarity index 90%
> > rename from drivers/firmware/arm_scmi/optee.c rename to
> > drivers/firmware/arm_scmi/scmi_transport_optee.c
> > index 99f3b0bfb956..7a16c8d3e213 100644
> > --- a/drivers/firmware/arm_scmi/optee.c
> > +++ b/drivers/firmware/arm_scmi/scmi_transport_optee.c
> > @@ -1,6 +1,6 @@
> >  // SPDX-License-Identifier: GPL-2.0
> >  /*
> > - * Copyright (C) 2019-2021 Linaro Ltd.
> > + * Copyright (C) 2019-2024 Linaro Ltd.
> 
> This should be kept unchanged?

Not sure, like I said previously, how to go about years.
Thanks,
Cristian