[PATCH v4 00/19] Basic clock, reset & device tree support for StarFive JH7110 RISC-V SoC

Hal Feng
2023-02-21T02:46:58Z

This patch series adds basic clock, reset & DT support for StarFive
JH7110 SoC. Patch 17 depends on series [1] which provides pinctrl
dt-bindings. Patch 19 depends on series [2] which provides dt-bindings
of VisionFive 2 board and JH7110 SoC.

You can simply review or test the patches at the link [3].

[1]: https://lore.kernel.org/all/20230209143702.44408-1-hal.feng@starfivetech.com/
[2]: https://lore.kernel.org/all/20230216131511.3327943-1-conor.dooley@microchip.com/
[3]: https://github.com/hal-feng/linux/commits/visionfive2-minimal

Changes since v3:
- Suggested by Conor, Merged clock & reset series and DT series together
so that they could go via the same tree as the dt-binding headers are
required by both driver & devicetree.
- Rebased on tag v6.2.

[Clock & reset]
Patch 2:
- Split patch 2 into two. One for renaming file and one for renaming
variables. (by Conor)
Patch 4:
- Split patch 4 into two. One for code movement and one for
extraction. (by Conor)
Patch 5 & 9 & 10 & 11:
- Fixed the issues reported by kernel test robot.
Patch 9:
- Set (&priv->base) as driver data instead of (priv->base).
- Set the frequency of clock PLL0 as 1000MHz for Synchronizing with the
lastest u-boot setting from StarFive. (by Emil)
- Used devm_kzalloc() instead of kzalloc() when registering aux device.
Patch 10:
- Set (&priv->base) as driver data instead of (priv->base).
Patch 11:
- Used (*base) to get the register base address instead of (base).

[Device tree]
- Dropped patch 1, 4, 5 because they were accepted.
- Added a new patch to add SiFive S7 compatible. (by Conor)
- Added a new patch to add JH7110 pin function definitions.
Patch 6:
- Changed the label "S76_0" to "S7_0" and used compatible "sifive,s7"
for core 0.
- Updated ISA of each cores. (by Conor)
- Made the node names generic. (by Krzysztof)
- Added clock-output-names for all external clocks.
- Added i2c0~6 nodes.
- Changed the node name "gpio" to "pinctrl". Changed the label "gpio"
and "gpioa" to "sysgpio" and "aongpio". (by Conor)
Patch 7:
- Separated the long lines into more lines in Makefile. (by Conor)
- Renamed jh7110-starfive-visionfive-2-va.dts and
jh7110-starfive-visionfive-2-vb.dts to
jh7110-starfive-visionfive-2-v1.2a.dts and
jh7110-starfive-visionfive-2-v1.3b.dts.
Changed the model and compatible to match v1.2A and v1.3B which
are printed on the silkscreen of VisionFive 2 board. (by Emil)
- Configured pins for i2c0/2/5/6 and enabled them.

clock & reset v3: https://lore.kernel.org/all/20221220005054.34518-1-hal.feng@starfivetech.com/
DT v3: https://lore.kernel.org/all/20221220011247.35560-1-hal.feng@starfivetech.com/

Changes since v2:
[Clock & reset]
- Rebased on tag v6.1.
- Added "JH71X0" to the StarFive driver headers in MAINTAINERS.
- Removed Co-developed-by tag of Hal in patch 1 and patch 4.
- Changed the commit author from Hal to Emil in patch 2 and patch 5.
Removed Co-developed-by tag of Emil in patch 2 and patch 5. (by Emil)
- Improved the coding style of patch 11, 12 and 13.
- Dropped patch 14. (by Emil)
Patch 4:
- Passed the "owner" member of reset_controller_dev structure
directly in reset_starfive_jh7100_register(). (by Emil)
- Added MAINTAINERS changes.
Patch 7:
- Split patch 7 into sys part and aon part. Merged them into patch 9 and
patch 10 respectively. (by Krzysztof)
- Renamed include/dt-bindings/clock/starfive-jh7110.h to
include/dt-bindings/clock/starfive,jh7110-crg.h. (by Krzysztof)
- Synchronized the definitions with the latest changes from Emil.
Patch 8:
- Split patch 8 into sys part and aon part. Merged them into patch 9 and
patch 10 respectively. (by Krzysztof)
- Renamed include/dt-bindings/reset/starfive-jh7110.h to
include/dt-bindings/reset/starfive,jh7110-crg.h. (by Krzysztof)
- Fixed the date of Copyright. (by Emil)
- Dropped weird indentations. (by Krzysztof)
- Synchronized the definitions with the latest changes from Emil.
Patch 9:
- Improved the description of clocks. (by Emil and Krzysztof)
- Added MAINTAINERS changes.
Patch 10:
- Improved the description of clocks. (by Emil and Krzysztof)
- Changed the clock-name "clk_rtc" to "rtc_osc" and "apb_bus_func" to
"apb_bus".
Patch 11:
- Removed the flags of trace/debug clocks and set the flags of core clocks
as CLK_IS_CRITICAL. (by Emil)
- Deleted the extra 1-1 clocks and synchronized the clock tree with the
latest changes from Emil. (by Emil)
- Selected RESET_STARFIVE_JH7110 in Kconfig option CLK_STARFIVE_JH7110_SYS.
Patch 12:
- Changed the macro JH7110_AONCLK_RTC to JH7110_AONCLK_RTC_OSC and
JH7110_AONCLK_APB_BUS_FUNC to JH7110_AONCLK_APB_BUS.
- Synchronized the clock tree with the latest changes from Emil.
- Set the MODULE_LICENSE as "GPL" according to commit bf7fbeeae6db.
Patch 13:
- Removed the "asserted" member in reset_info structure and always pass
NULL when calling reset_starfive_jh71x0_register(). (by Emil)

[Device tree]
- Rebased on tag v6.1.
- Dropped patch 8 because it was merged.
Patch 1:
- Made the links into "Link:" tags. (by Conor)
- Corrected the board name to "VisionFive 2" instead of
"VisionFive V2" and added compatibles for version A and
version B of VisionFive 2. (by Emil)
Patch 4:
- Used "sifive,ccache0" compatible string to match. (by Conor)
Patch 5:
- Dropped "select SIFIVE_CCACHE" in config SOC_STARFIVE. (by Conor)
- Dropped "starfive,jh7110-ccache" compatible in
drivers/soc/sifive/sifive_ccache.c.
Patch 6:
- Removed all "clock-frequency = <0>". (by Conor)
- Sorted the nodes after their addresses. (by Emil)
- Renamed "clk_rtc" to "rtc_osc".
- Added "sifive,ccache0" compatible in the cache-controller node.
- Renamed "JH7110_SYSCLK_APB_BUS_FUNC" to "JH7110_SYSCLK_APB_BUS" and
renamed "apb_bus_func" to "apb_bus".
Renamed "JH7110_SYSCLK_IOMUX" to "JH7110_SYSCLK_IOMUX_APB".
Renamed "JH7110_SYSRST_IOMUX" to "JH7110_SYSRST_IOMUX_APB".
Renamed "JH7110_AONRST_AON_IOMUX" to "JH7110_AONRST_IOMUX".
- Removed "reg-names" in gpio nodes.
Patch 7:
- Corrected the board name to "VisionFive 2" instead of "VisionFive V2".
- Renamed jh7110-starfive-visionfive-v2.dts to
jh7110-starfive-visionfive-2.dtsi.
- Added dts for VisionFive 2 version A and version B boards.
- In the chosen node, deleted "linux,initrd-start" and "linux,initrd-end"
and changed the value of "stdout-path" to "serial0:115200n8".
- Changed the bias of uart0 "rx-pins" to
"bias-disable; /* external pull-up */".
- Renamed "clk_rtc" to "rtc_osc".
- Moved the gpio node behind the uart0 node.

clock & reset v2: https://lore.kernel.org/all/20221118010627.70576-1-hal.feng@starfivetech.com/
DT v2: https://lore.kernel.org/all/20221118011714.70877-1-hal.feng@starfivetech.com/

Changes since v1:
[Clock & reset]
- Rebased on tag v6.1-rc5.
- Rewrote the clock and reset drivers using auxiliary bus framework, so
patch 8, 9, 15 were dropped and all patches changed a lot. (by Stephen)
- Split Patch 14 into two patches. One is for factoring out the common
JH71X0 code, the another one is for renaming. (by Stephen)
- Created a subdirectory for StarFive reset drivers.
- Factored out common JH71X0 reset code.
- Renamed the common clock and reset code from "*starfive*" or
"*STARFIVE*" to "*jh71x0*" or "*JH71X0*".
- Combined JH7110 system and always-on clock DT binding headers in one
file named "include/dt-bindings/clock/starfive-jh7110.h".
- Renamed clock definitions "JH7110_SYSCLK_PCLK2_MUX_FUNC_PCLK" and
"JH7110_SYSCLK_U2_PCLK_MUX_PCLK" to "JH7110_SYSCLK_PCLK2_MUX_FUNC" and
"JH7110_SYSCLK_PCLK2_MUX".
- Rewrote the DT bindings of clock and reset for using auxiliary bus.
- Registered an auxiliary device for reset controller in clock drivers.
- Changed clock names "CODAJ*" and "WAVE*" to "codaj*" and "wave*".
Changed clock names "u2_pclk_mux_func_pclk" and "u2_pclk_mux_pclk" to
"pclk2_mux_func" and "pclk2_mux".
- Changed the flags of clock apb0 and noc_bus_isp_axi to CLK_IS_CRITICAL
as suggested by StarFive SDK group.
- Registered clock gmac0_gtxc as a gate clock instead of a div clock
as suggested by StarFive SDK group.
- Changed the frequency of clock pll2_out to 1188MHz as suggested by
StarFive SDK group.
- Fixed the bug that the clock JH7110_AONCLK_GMAC0_GTXCLK was not handled
in JH7110 always-on clock driver.
- Registered the reset driver as an auxiliary driver.
- Reworded the commit messages.

[Device tree]
- Rebased on tag v6.1-rc5.
- Added blank line in patch 1. (by Krzysztof)
- Rebased patch 4 and 6 on the newest code. (by Conor)
- Dropped patch 5. (by Conor)
- Removed the quirk of JH7100 in patch 6, considering this patch series
should only add support for JH7110.
- For patch 27, added Co-developed-by tag for Jianlong and me. Renamed
cpu labels to "S76_0", "U74_*" instead of "cpu*" following the style
of jh7100.dtsi. Moved all "clock-frequency" properties to the board dts.
Rewrote clock-controller nodes and deleted reset-controller nodes for
using auxiliary bus. Rewrote gpio nodes following generic pinctrl
bindings. Removed the redundant second reset entry of uart nodes.
- For patch 28, added Co-developed-by tag for Jianlong and me. Added a
chosen node. Removed reserved-memory node. Added fixed frequency clock
nodes for overriding the "clock-frequency" properties. Rewrote the gpio
nodes following generic pinctrl bindings.
- Dropped patch 30. (by Conor)
- Reworded the commit messages.

v1: https://lore.kernel.org/all/20220929143225.17907-1-hal.feng@linux.starfivetech.com/

Emil Renner Berthing (16):
clk: starfive: Factor out common JH7100 and JH7110 code
clk: starfive: Rename clk-starfive-jh7100.h to clk-starfive-jh71x0.h
clk: starfive: Rename "jh7100" to "jh71x0" for the common code
reset: Create subdirectory for StarFive drivers
reset: starfive: Factor out common JH71X0 reset code
reset: starfive: Extract the common JH71X0 reset code
reset: starfive: Rename "jh7100" to "jh71x0" for the common code
reset: starfive: jh71x0: Use 32bit I/O on 32bit registers
dt-bindings: clock: Add StarFive JH7110 system clock and reset
generator
dt-bindings: clock: Add StarFive JH7110 always-on clock and reset
generator
clk: starfive: Add StarFive JH7110 system clock driver
clk: starfive: Add StarFive JH7110 always-on clock driver
dt-bindings: timer: Add StarFive JH7110 clint
dt-bindings: interrupt-controller: Add StarFive JH7110 plic
riscv: dts: starfive: Add initial StarFive JH7110 device tree
riscv: dts: starfive: Add StarFive JH7110 VisionFive 2 board device
tree

Hal Feng (2):
reset: starfive: Add StarFive JH7110 reset driver
dt-bindings: riscv: Add SiFive S7 compatible

Jianlong Huang (1):
riscv: dts: starfive: Add StarFive JH7110 pin function definitions

.../clock/starfive,jh7110-aoncrg.yaml | 76 ++
.../clock/starfive,jh7110-syscrg.yaml | 80 ++
.../sifive,plic-1.0.0.yaml | 1 +
.../devicetree/bindings/riscv/cpus.yaml | 1 +
.../bindings/timer/sifive,clint.yaml | 1 +
MAINTAINERS | 16 +-
arch/riscv/boot/dts/starfive/Makefile | 6 +-
arch/riscv/boot/dts/starfive/jh7110-pinfunc.h | 308 ++++++++
.../jh7110-starfive-visionfive-2-v1.2a.dts | 13 +
.../jh7110-starfive-visionfive-2-v1.3b.dts | 13 +
.../jh7110-starfive-visionfive-2.dtsi | 215 ++++++
arch/riscv/boot/dts/starfive/jh7110.dtsi | 507 +++++++++++++
drivers/clk/starfive/Kconfig | 27 +
drivers/clk/starfive/Makefile | 6 +-
.../clk/starfive/clk-starfive-jh7100-audio.c | 74 +-
drivers/clk/starfive/clk-starfive-jh7100.c | 713 +++++-------------
drivers/clk/starfive/clk-starfive-jh7100.h | 112 ---
.../clk/starfive/clk-starfive-jh7110-aon.c | 156 ++++
.../clk/starfive/clk-starfive-jh7110-sys.c | 448 +++++++++++
drivers/clk/starfive/clk-starfive-jh71x0.c | 383 ++++++++++
drivers/clk/starfive/clk-starfive-jh71x0.h | 122 +++
drivers/reset/Kconfig | 8 +-
drivers/reset/Makefile | 2 +-
drivers/reset/reset-starfive-jh7100.c | 173 -----
drivers/reset/starfive/Kconfig | 20 +
drivers/reset/starfive/Makefile | 5 +
.../reset/starfive/reset-starfive-jh7100.c | 74 ++
.../reset/starfive/reset-starfive-jh7110.c | 64 ++
.../reset/starfive/reset-starfive-jh71x0.c | 131 ++++
.../reset/starfive/reset-starfive-jh71x0.h | 20 +
.../dt-bindings/clock/starfive,jh7110-crg.h | 225 ++++++
.../dt-bindings/reset/starfive,jh7110-crg.h | 154 ++++
32 files changed, 3296 insertions(+), 858 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/starfive,jh7110-aoncrg.yaml
create mode 100644 Documentation/devicetree/bindings/clock/starfive,jh7110-syscrg.yaml
create mode 100644 arch/riscv/boot/dts/starfive/jh7110-pinfunc.h
create mode 100644 arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2-v1.2a.dts
create mode 100644 arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2-v1.3b.dts
create mode 100644 arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
create mode 100644 arch/riscv/boot/dts/starfive/jh7110.dtsi
delete mode 100644 drivers/clk/starfive/clk-starfive-jh7100.h
create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-aon.c
create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-sys.c
create mode 100644 drivers/clk/starfive/clk-starfive-jh71x0.c
create mode 100644 drivers/clk/starfive/clk-starfive-jh71x0.h
delete mode 100644 drivers/reset/reset-starfive-jh7100.c
create mode 100644 drivers/reset/starfive/Kconfig
create mode 100644 drivers/reset/starfive/Makefile
create mode 100644 drivers/reset/starfive/reset-starfive-jh7100.c
create mode 100644 drivers/reset/starfive/reset-starfive-jh7110.c
create mode 100644 drivers/reset/starfive/reset-starfive-jh71x0.c
create mode 100644 drivers/reset/starfive/reset-starfive-jh71x0.h
create mode 100644 include/dt-bindings/clock/starfive,jh7110-crg.h
create mode 100644 include/dt-bindings/reset/starfive,jh7110-crg.h

base-commit: c9c3395d5e3dcc6daee66c6908354d47bf98cb0c
--
2.38.1