Re: [PATCH v12 0/5] riscv: sophgo: add clock support for sg2042

From: Chen Wang
Date: Fri Mar 29 2024 - 00:01:23 EST

I just found there is a defect in driver code, I will send a new version later soon. Please ignore this v12.

Thanks,

Chen

On 2024/3/27 16:29, Chen Wang wrote:
From: Chen Wang <unicorn_wang@xxxxxxxxxxx>

This series adds clock controller support for sophgo sg2042.

Thanks,
Chen

---

Changes in v12:

The patch series is based on v6.9-rc1.

Improved the dirvier code as per review comments from Stephen Boyd.
- Remove default y for CLK_SOPHGO_SG2042.
- Optimize sg2042_pll_get_postdiv_1_2, move postdiv1_2 to the function.
scope and add more explaniation.
- Optimize sg2042_get_pll_ctl_setting.
- Switch to platform driver.
- Use clk_hw for initialization of struct clks.
- Don't use ignore_unused when using critical.
- Other code cleanup as per input form the reviewers.

Changes in v11:

The patch series is based on v6.8-rc5. You can simply review or test the
patches at the link [12].

Quick fixed some dt_binding_check errors reported by Rob.

Changes in v10:

The patch series is based on v6.8-rc4. You can simply review or test the
patches at the link [11].

Add input clocks for rpgate & clkgen.

Changes in v9:
The patch series is based on v6.8-rc2. You can simply review or test the
patches at the link [10].

From this version, drop the system-controller node due to there is no actual
device corresponding to it in IC design. SYS_CTRL is just a registers segment
defined on TRM for misc functions. Now three clock-controllers are defined for
SG2042, the control registers of the three clock-controllers are scattered in
different memory address spaces:
- the first one is for pll clocks;
- the second one is for gate clocks for RP subsystem;
- the third one is for div/mux, and gate clocks working for other subsystem
than RP subsystem.

Changes in v8:
The patch series is based on v6.7. You can simply review or test the
patches at the link [9].
In this version, the main change is to split one clock provider into two.
Strictly follow the hardware instructions, in the memoymap, the control
registers of some clocks are defined in the SYS_CTRL segment, and the
control registers of other clocks are defined in the CLOCK segment.
Therefore, the new design defines two clock controllers, one as a child
node of the system control and the other as an independent clock controller
node.

This modification involves a major modification to the binding files, so
the reviewed-by tags has been deleted.

Changes in v7:
The patch series is based on v6.7. You can simply review or test the
patches at the link [8].
- fixed initval issue.
- fixed pll clk crash issue.
- fixed warning reported by <lkp@xxxxxxxxx>
- code optimization as per review comments.
- code cleanup and style improvements as per review comments and checkpatch
with "--strict"

Changes in v6:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [7].
- fixed some warnings/errors reported by kernel test robot <lkp@xxxxxxxxx>.

Changes in v5:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [6].
- dt-bindings: improved yaml, such as:
- add vendor prefix for system-ctrl property for clock generator.
- Add explanation for system-ctrl property.
- move sophgo,sg2042-clkgen.yaml to directly under clock folder.
- fixed bugs for driver Makefile/Kconfig
- continue cleaning-up debug print for driver code.

Changes in v4:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [5].
- dt-bindings: fixed a dt_binding_check error.

Changes in v3:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [3].
- DTS: don't use syscon but define sg2042 specific system control node. More
background info can read [4].
- Updating minor issues in dt-bindings as per input from reviews.

Changes in v2:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [2].
- Squashed the patch adding clock definitions with the patch adding the
binding for the clock controller.
- Updating dt-binding for syscon, remove oneOf for property compatible;
define clock controller as child of syscon.
- DTS changes: merge sg2042-clock.dtsi into sg2042.dtsi; move clock-frequency
property of osc to board devicethree due to the oscillator is outside the
SoC.
- Fixed some bugs in driver code during testing, including removing warnings
for rv32_defconfig.
- Updated MAINTAINERS info.

Changes in v1:
The patch series is based on v6.7-rc1. You can simply review or test the
patches at the link [1].

Link: https://lore.kernel.org/linux-riscv/cover.1699879741.git.unicorn_wang@xxxxxxxxxxx/ [1]
Link: https://lore.kernel.org/linux-riscv/cover.1701044106.git.unicorn_wang@xxxxxxxxxxx/ [2]
Link: https://lore.kernel.org/linux-riscv/cover.1701691923.git.unicorn_wang@xxxxxxxxxxx/ [3]
Link: https://lore.kernel.org/linux-riscv/MA0P287MB03329AE180378E1A2E034374FE82A@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ [4]
Link: https://lore.kernel.org/linux-riscv/cover.1701734442.git.unicorn_wang@xxxxxxxxxxx/ [5]
Link: https://lore.kernel.org/linux-riscv/cover.1701938395.git.unicorn_wang@xxxxxxxxxxx/ [6]
Link: https://lore.kernel.org/linux-riscv/cover.1701997033.git.unicorn_wang@xxxxxxxxxxx/ [7]
Link: https://lore.kernel.org/linux-riscv/cover.1704694903.git.unicorn_wang@xxxxxxxxxxx/ [8]
Link: https://lore.kernel.org/linux-riscv/cover.1705388518.git.unicorn_wang@xxxxxxxxxxx/ [9]
Link: https://lore.kernel.org/linux-riscv/cover.1706854074.git.unicorn_wang@xxxxxxxxxxx/ [10]
Link: https://lore.kernel.org/linux-riscv/cover.1708223519.git.unicorn_wang@xxxxxxxxxxx/ [11]
Link: https://lore.kernel.org/linux-riscv/cover.1708397315.git.unicorn_wang@xxxxxxxxxxx/ [12]

---

Chen Wang (5):
dt-bindings: clock: sophgo: add pll clocks for SG2042
dt-bindings: clock: sophgo: add RP gate clocks for SG2042
dt-bindings: clock: sophgo: add clkgen for SG2042
clk: sophgo: Add SG2042 clock driver
riscv: dts: add clock generator for Sophgo SG2042 SoC

.../bindings/clock/sophgo,sg2042-clkgen.yaml | 49 +
.../bindings/clock/sophgo,sg2042-pll.yaml | 45 +
.../bindings/clock/sophgo,sg2042-rpgate.yaml | 43 +
.../boot/dts/sophgo/sg2042-milkv-pioneer.dts | 12 +
arch/riscv/boot/dts/sophgo/sg2042.dtsi | 49 +-
drivers/clk/Kconfig | 1 +
drivers/clk/Makefile | 1 +
drivers/clk/sophgo/Kconfig | 7 +
drivers/clk/sophgo/Makefile | 2 +
drivers/clk/sophgo/clk-sophgo-sg2042.c | 1410 +++++++++++++++++
drivers/clk/sophgo/clk-sophgo-sg2042.h | 216 +++
.../dt-bindings/clock/sophgo,sg2042-clkgen.h | 111 ++
include/dt-bindings/clock/sophgo,sg2042-pll.h | 14 +
.../dt-bindings/clock/sophgo,sg2042-rpgate.h | 58 +
14 files changed, 2017 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/clock/sophgo,sg2042-clkgen.yaml
create mode 100644 Documentation/devicetree/bindings/clock/sophgo,sg2042-pll.yaml
create mode 100644 Documentation/devicetree/bindings/clock/sophgo,sg2042-rpgate.yaml
create mode 100644 drivers/clk/sophgo/Kconfig
create mode 100644 drivers/clk/sophgo/Makefile
create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.c
create mode 100644 drivers/clk/sophgo/clk-sophgo-sg2042.h
create mode 100644 include/dt-bindings/clock/sophgo,sg2042-clkgen.h
create mode 100644 include/dt-bindings/clock/sophgo,sg2042-pll.h
create mode 100644 include/dt-bindings/clock/sophgo,sg2042-rpgate.h


base-commit: 4cece764965020c22cff7665b18a012006359095