kernel/include/soc/rockchip/rockchip_grf.h, branch linux-6.18.y

PM / devfreq: rockchip-dfi: add support for LPDDR5

2025-09-09T14:37:39Z

The Rockchip RK3588 SoC can also support LPDDR5 memory. This type of memory needs some special case handling in the rockchip-dfi driver. Add support for it in rockchip-dfi, as well as the needed GRF register definitions. This has been tested as returning both the right cycle count and bandwidth on a LPDDR5 board where the CKR bit is 1. I couldn't test whether the values are correct on a system where CKR is 0, as I'm not savvy enough with the Rockchip tooling to know whether this can be set in the DDR init blob. Downstream has some special case handling for a hardware version where not just the control bits differ, but also the register. Since I don't know whether that hardware version is in any production silicon, it's left unimplemented for now, with an error message urging users to report if they have such a system. There is a slight change of behaviour for non-LPDDR5 systems: instead of writing 0 as the control flags to the control register and pretending everything is alright if the memory type is unknown, we now explicitly return an error. Signed-off-by: Nicolas Frattaroli Reviewed-by: Sascha Hauer Acked-by: Heiko Stuebner Signed-off-by: Chanwoo Choi Link: https://patchwork.kernel.org/project/linux-pm/patch/20250530-rk3588-dfi-improvements-v1-2-6e077c243a95@collabora.com/

PM / devfreq: rockchip-dfi: Handle LPDDR4X

2023-10-19T11:48:28Z

In the DFI driver LPDDR4X can be handled in the same way as LPDDR4. Add the missing case. Link: https://lore.kernel.org/all/20231018061714.3553817-13-s.hauer@pengutronix.de/ Reviewed-by: Jonathan Cameron Reviewed-by: Sebastian Reichel Acked-by: Chanwoo Choi Acked-by: Heiko Stuebner Signed-off-by: Sascha Hauer Signed-off-by: Chanwoo Choi

PM / devfreq: rk3399_dmc,dfi: generalize DDRTYPE defines

2023-10-19T11:39:08Z

The DDRTYPE defines are named to be RK3399 specific, but they can be used for other Rockchip SoCs as well, so replace the RK3399_PMUGRF_ prefix with ROCKCHIP_. They are defined in a SoC specific header file, so when generalizing the prefix also move the new defines to a SoC agnostic header file. While at it use GENMASK to define the DDRTYPE bitfield and give it a name including the full register name. Link: https://lore.kernel.org/all/20231018061714.3553817-9-s.hauer@pengutronix.de/ Reviewed-by: Sebastian Reichel Acked-by: Chanwoo Choi Acked-by: Heiko Stuebner Signed-off-by: Sascha Hauer Signed-off-by: Chanwoo Choi