Re: [PATCH 0/9] rockchip: Remove unneeded syscon driver for RK35xx

Hi Jonas,

On Tue, 4 Aug 2026 at 04:57, Jonas Karlman <[email protected]> wrote:
>
> This series takes the initial steps required to try and remove use of
> syscon_get_first_range() or syscon_get_regmap_by_driver_data() to get
> GRF base addresses at runtime for the Rockchip platform.
>
> The GRF base addresses are fixed and known at compile time, yet drivers
> keep trying to resolve them at runtime delaying some operations by
> several ms.

I suppose all addresses are known at compile-time, if you have a
single device tree. I have always hoped that we might end up with a
generic U-Boot for rockchip.

I wonder if there is another way to do this, perhaps reading the
address once and caching it?

>
> In this initial part the three current uses of ROCKCHIP_SYSCON_x lookup
> used on RK35xx SoCs is converted to use a constant value or using
> phandle lookup, followed by removing the SoC specific syscon driver and
> finally removing the RK35xx special ROCKCHIP_SYSCON_x enum values.
>
> The changes included in this series have no intended behavior change for
> the affected RK35xx SoCs.
>
> Future series will continue to convert uses of ROCKCHIP_SYSCON_x for
> remaining older RK SoCs if this initial part is accepted.
>
> Jonas Karlman (9):
>   ram: rockchip: rk3568: Simplify get_info() ops
>   ram: rockchip: rk3588: Simplify get_info() ops
>   video: rockchip: dw_mipi_dsi: Get GRF base address from phandle
>   rockchip: rk3568: Remove unneeded syscon driver
>   rockchip: rk3588: Remove unneeded syscon driver
>   rockchip: rk3576: Remove unneeded syscon driver
>   rockchip: rk3528: Remove unneeded syscon driver
>   rockchip: rk3506: Remove unneeded syscon driver
>   rockchip: include: Remove unused ROCKCHIP_SYSCON_x enum values
>
>  arch/arm/include/asm/arch-rockchip/clock.h    |  8 -----
>  arch/arm/mach-rockchip/rk3506/Makefile        |  1 -
>  arch/arm/mach-rockchip/rk3506/syscon_rk3506.c | 19 ------------
>  arch/arm/mach-rockchip/rk3528/Makefile        |  1 -
>  arch/arm/mach-rockchip/rk3528/syscon_rk3528.c | 19 ------------
>  arch/arm/mach-rockchip/rk3568/Makefile        |  1 -
>  arch/arm/mach-rockchip/rk3568/syscon_rk3568.c | 23 --------------
>  arch/arm/mach-rockchip/rk3576/Makefile        |  1 -
>  arch/arm/mach-rockchip/rk3576/syscon_rk3576.c | 22 -------------
>  arch/arm/mach-rockchip/rk3588/Makefile        |  1 -
>  arch/arm/mach-rockchip/rk3588/syscon_rk3588.c | 31 -------------------
>  drivers/ram/rockchip/sdram_rk3568.c           | 29 +++--------------
>  drivers/ram/rockchip/sdram_rk3588.c           | 31 ++++---------------
>  drivers/video/rockchip/dw_mipi_dsi_rockchip.c | 16 ++++++----
>  14 files changed, 21 insertions(+), 182 deletions(-)
>  delete mode 100644 arch/arm/mach-rockchip/rk3506/syscon_rk3506.c
>  delete mode 100644 arch/arm/mach-rockchip/rk3528/syscon_rk3528.c
>  delete mode 100644 arch/arm/mach-rockchip/rk3568/syscon_rk3568.c
>  delete mode 100644 arch/arm/mach-rockchip/rk3576/syscon_rk3576.c
>  delete mode 100644 arch/arm/mach-rockchip/rk3588/syscon_rk3588.c
>
> --
> 2.54.0
>

Regards,
Simon