On Tue 06 Jul 23:53 CDT 2021, John Stultz wrote:
> Allow the qcom_scm driver to be loadable as a permenent module.
>
> This still uses the "depends on QCOM_SCM || !QCOM_SCM" bit to
> ensure that drivers that call into the qcom_scm driver are
> also built as modules. While not ideal in some cases its the
> only safe way I can find to avoid build errors without having
> those drivers select QCOM_SCM and have to force it on (as
> QCOM_SCM=n can be valid for those drivers).
>
> Reviving this now that Saravana's fw_devlink defaults to on,
> which should avoid loading troubles seen before.
>
Are you (in this last paragraph) saying that all those who have been
burnt by fw_devlink during the last months and therefor run with it
disabled will have a less fun experience once this is merged?
(I'm picking this up, but I don't fancy the idea that some people are
turning the boot process into a lottery)
Regards,
Bjorn
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Andy Gross <agross@xxxxxxxxxx>
> Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> Cc: Joerg Roedel <joro@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Cc: Vinod Koul <vkoul@xxxxxxxxxx>
> Cc: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
> Cc: Maulik Shah <mkshah@xxxxxxxxxxxxxx>
> Cc: Saravana Kannan <saravanak@xxxxxxxxxx>
> Cc: Todd Kjos <tkjos@xxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-arm-msm@xxxxxxxxxxxxxxx
> Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Cc: linux-gpio@xxxxxxxxxxxxxxx
> Acked-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Acked-by: Will Deacon <will@xxxxxxxxxx>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---
> v3:
> * Fix __arm_smccc_smc build issue reported by
> kernel test robot <lkp@xxxxxxxxx>
> v4:
> * Add "depends on QCOM_SCM || !QCOM_SCM" bit to ath10k
> config that requires it.
> v5:
> * Fix QCOM_QCM typo in Kconfig, it should be QCOM_SCM
> ---
> drivers/firmware/Kconfig | 2 +-
> drivers/firmware/Makefile | 3 ++-
> drivers/firmware/qcom_scm.c | 4 ++++
> drivers/iommu/Kconfig | 2 ++
> drivers/net/wireless/ath/ath10k/Kconfig | 1 +
> 5 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
> index db0ea2d2d75a..af53778edc7e 100644
> --- a/drivers/firmware/Kconfig
> +++ b/drivers/firmware/Kconfig
> @@ -235,7 +235,7 @@ config INTEL_STRATIX10_RSU
> Say Y here if you want Intel RSU support.
>
> config QCOM_SCM
> - bool
> + tristate "Qcom SCM driver"
> depends on ARM || ARM64
> depends on HAVE_ARM_SMCCC
> select RESET_CONTROLLER
> diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
> index 5e013b6a3692..523173cbff33 100644
> --- a/drivers/firmware/Makefile
> +++ b/drivers/firmware/Makefile
> @@ -17,7 +17,8 @@ obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o
> obj-$(CONFIG_FIRMWARE_MEMMAP) += memmap.o
> obj-$(CONFIG_RASPBERRYPI_FIRMWARE) += raspberrypi.o
> obj-$(CONFIG_FW_CFG_SYSFS) += qemu_fw_cfg.o
> -obj-$(CONFIG_QCOM_SCM) += qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o
> +obj-$(CONFIG_QCOM_SCM) += qcom-scm.o
> +qcom-scm-objs += qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o
> obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o
> obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
> obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index ee9cb545e73b..bb9ce3f92931 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -1296,6 +1296,7 @@ static const struct of_device_id qcom_scm_dt_match[] = {
> { .compatible = "qcom,scm" },
> {}
> };
> +MODULE_DEVICE_TABLE(of, qcom_scm_dt_match);
>
> static struct platform_driver qcom_scm_driver = {
> .driver = {
> @@ -1312,3 +1313,6 @@ static int __init qcom_scm_init(void)
> return platform_driver_register(&qcom_scm_driver);
> }
> subsys_initcall(qcom_scm_init);
> +
> +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. SCM driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index 07b7c25cbed8..f61516c17589 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -253,6 +253,7 @@ config SPAPR_TCE_IOMMU
> config ARM_SMMU
> tristate "ARM Ltd. System MMU (SMMU) Support"
> depends on ARM64 || ARM || (COMPILE_TEST && !GENERIC_ATOMIC64)
> + depends on QCOM_SCM || !QCOM_SCM #if QCOM_SCM=m this can't be =y
> select IOMMU_API
> select IOMMU_IO_PGTABLE_LPAE
> select ARM_DMA_USE_IOMMU if ARM
> @@ -382,6 +383,7 @@ config QCOM_IOMMU
> # Note: iommu drivers cannot (yet?) be built as modules
> bool "Qualcomm IOMMU Support"
> depends on ARCH_QCOM || (COMPILE_TEST && !GENERIC_ATOMIC64)
> + depends on QCOM_SCM=y
> select IOMMU_API
> select IOMMU_IO_PGTABLE_LPAE
> select ARM_DMA_USE_IOMMU
> diff --git a/drivers/net/wireless/ath/ath10k/Kconfig b/drivers/net/wireless/ath/ath10k/Kconfig
> index 40f91bc8514d..741289e385d5 100644
> --- a/drivers/net/wireless/ath/ath10k/Kconfig
> +++ b/drivers/net/wireless/ath/ath10k/Kconfig
> @@ -44,6 +44,7 @@ config ATH10K_SNOC
> tristate "Qualcomm ath10k SNOC support"
> depends on ATH10K
> depends on ARCH_QCOM || COMPILE_TEST
> + depends on QCOM_SCM || !QCOM_SCM #if QCOM_SCM=m this can't be =y
> select QCOM_QMI_HELPERS
> help
> This module adds support for integrated WCN3990 chip connected
> --
> 2.25.1
>
