Re: [PATCH 2/4] soc: qcom: Restrict drivers per ARM/ARM64

Konrad Dybcio
2026-04-29T09:03:34Z

On 4/29/26 10:56 AM, Krzysztof Kozlowski wrote:
> There is no point to allow selecting core SoC drivers for Qualcomm ARMv7
> SoCs when building ARM64 kernel, and vice versa.
>
> This makes kernel configuration more difficult as many do not remember
> the Qualcomm SoCs model names/numbers and their properties like
> architecture. No features should be lost because:
> 1. There won't be a single image for ARMv7 and ARMv8/9 SoCs.
> 2. Newer ARMv8/9 SoCs won't be running in arm32 emulation mode.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
> ---

[...]

> drivers/soc/qcom/Kconfig | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
> index 62ce1c67d684..9a050ba1dbcb 100644
> --- a/drivers/soc/qcom/Kconfig
> +++ b/drivers/soc/qcom/Kconfig
> @@ -19,6 +19,7 @@ config QCOM_AOSS_QMP
> tristate "Qualcomm AOSS Driver"
> depends on MAILBOX
> depends on COMMON_CLK && PM
> + depends on ARM64 || COMPILE_TEST

SDX65

> select PM_GENERIC_DOMAINS
> help
> This driver provides the means of communicating with and controlling
> @@ -37,6 +38,7 @@ config QCOM_COMMAND_DB
>
> config QCOM_GENI_SE
> tristate "QCOM GENI Serial Engine Driver"
> + depends on ARM64 || COMPILE_TEST

OK

> help
> This driver is used to manage Generic Interface (GENI) firmware based
> Qualcomm Technologies, Inc. Universal Peripheral (QUP) Wrapper. This
> @@ -45,6 +47,7 @@ config QCOM_GENI_SE
>
> config QCOM_GSBI
> tristate "QCOM General Serial Bus Interface"
> + depends on ARM || COMPILE_TEST

OK

> select MFD_SYSCON
> help
> Say y here to enable GSBI support. The GSBI provides control
> @@ -53,6 +56,7 @@ config QCOM_GSBI
>
> config QCOM_LLCC
> tristate "Qualcomm Technologies, Inc. LLCC driver"
> + depends on ARM64 || COMPILE_TEST

SDX65

> select REGMAP_MMIO
> help
> Qualcomm Technologies, Inc. platform specific
> @@ -108,6 +112,7 @@ config QCOM_PMIC_GLINK
> depends on DRM
> depends on NET
> depends on OF
> + depends on ARM64 || COMPILE_TEST

Probably OK?

> select AUXILIARY_BUS
> select QCOM_PDR_HELPERS
> select DRM_AUX_HPD_BRIDGE
> @@ -242,6 +247,7 @@ config QCOM_APR
> tristate "Qualcomm APR/GPR Bus (Asynchronous/Generic Packet Router)"
> depends on RPMSG
> depends on NET
> + depends on ARM64 || COMPILE_TEST

This I think goes back to <2012 SoCs

> select QCOM_PDR_HELPERS
> help
> Enable APR IPC protocol support between
> @@ -251,6 +257,7 @@ config QCOM_APR
>
> config QCOM_ICC_BWMON
> tristate "QCOM Interconnect Bandwidth Monitor driver"
> + depends on ARM64 || COMPILE_TEST

This is OK currently, some arm32 targets have an older (unsupported today)
BWMON, I don't know if they would be using the same driver or not

> select PM_OPP
> select REGMAP_MMIO
> help
> @@ -265,6 +272,7 @@ config QCOM_ICC_BWMON
>
> config QCOM_PBS
> tristate "PBS trigger support for Qualcomm Technologies, Inc. PMICS"
> + depends on ARM64 || COMPILE_TEST

MSM8909+PM660 exists and makes use of that

Konrad