Message ID | 20240301-mbly-clk-v9-0-cbf06eb88708@bootlin.com |
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Headers |
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charset="utf-8" Content-Transfer-Encoding: 8bit X-B4-Tracking: v=1; b=H4sIALUA4mUC/3XQyU7DMBQF0F+psiboDR5Z8R+IhUdq0TYoqSKqq v+OU4RqGlhk8SKf6+t37qY0ljR1T5tzN6a5TGU41ME+bLqwdYe31JdY546AGOvX7/3u1Ifde29 0SDKQwAymq8c/xpTL5zXq5bXO2zIdh/F0TZ5x+fsdggy3kBl76I3yGdHqiJye/TAcd+XwGIb9k voP8ZxARuWtT+5PQmjuiBC1r0AwGdQvspSd6VaQSDeUKnX1Lq84sIG8pvxDBWC7oJkrZUseELw hg2sqGsrYULG8MUQAiRCVgzWVN0pgGyorzWBFSjJZNG5NVUORGqoqDUJlh9myYbumuqHUFtbLW zHWHbNiCLympqXths1yq9TZR6eVEneFL5fLF90IzUOlAgAA To: Gregory CLEMENT <gregory.clement@bootlin.com>, Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, Linus Walleij <linus.walleij@linaro.org>, =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= <rafal@milecki.pl>, Philipp Zabel <p.zabel@pengutronix.de> Cc: Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>, linux-mips@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Tawfik Bayouk <tawfik.bayouk@mobileye.com>, linux-gpio@vger.kernel.org, =?utf-8?q?Th=C3=A9o_Lebrun?= <theo.lebrun@bootlin.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> X-Mailer: b4 0.13.0 X-GND-Sasl: theo.lebrun@bootlin.com X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792341670774186219 X-GMAIL-MSGID: 1792341670774186219 |
Series |
Add support for Mobileye EyeQ5 system controller
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Message
Théo Lebrun
March 1, 2024, 4:22 p.m. UTC
Hi,
Here again for a new revision of the system-controller on Mobileye
EyeQ5. It deals with clk, reset and pinctrl. Drivers are meant to be
merged in their respective trees. Each already have their dt-bindings
in -next.
MIPS is the one with dependencies to outside trees. The syscon
dt-bindings ("dt-bindings: soc: mobileye: add EyeQ5 OLB system
controller") depends on dt-bindings for the three drivers. Patches:
- dt-bindings: clock: mobileye,eyeq5-clk: add bindings
- dt-bindings: reset: mobileye,eyeq5-reset: add bindings
- dt-bindings: pinctrl: mobileye,eyeq5-pinctrl: add bindings
To build + test the series, you need:
- v6.8-rc6.
- Platform support [1] and [0] series (both in mips-next [2]).
- 4 patches from previous iteration, applied to clk-next [3].
- clk: fixed-factor: add optional accuracy support
- clk: fixed-factor: add fwname-based constructor functions
- dt-bindings: clock: mobileye,eyeq5-clk: add bindings
- dt-bindings: reset: mobileye,eyeq5-reset: add bindings
- Pinctrl dt-bindings patch in pinctrl-next [4].
- dt-bindings: pinctrl: mobileye,eyeq5-pinctrl: add bindings
Here is the patch list, split by subsystems.
- pinctrl:
[PATCH v9 4/9] pinctrl: eyeq5: add platform driver
- clk:
[PATCH v9 2/9] clk: eyeq5: add platform driver, and init routine at of_clk_init()
- reset:
[PATCH v9 3/9] reset: eyeq5: add platform driver
- MIPS:
[PATCH v9 1/9] dt-bindings: soc: mobileye: add EyeQ5 OLB system controller
[PATCH v9 5/9] MAINTAINERS: Map OLB files to Mobileye SoCs
[PATCH v9 6/9] MIPS: mobileye: eyeq5: add OLB syscon node
[PATCH v9 7/9] MIPS: mobileye: eyeq5: use OLB clocks controller node
[PATCH v9 8/9] MIPS: mobileye: eyeq5: add OLB reset controller node
[PATCH v9 9/9] MIPS: mobileye: eyeq5: add pinctrl node & pinmux function nodes
Thanks all for the previous feedback!
Have a nice day,
Théo Lebrun
[0]: https://lore.kernel.org/lkml/20240216174227.409400-1-gregory.clement@bootlin.com/
[1]: https://lore.kernel.org/linux-mips/20240209-regname-v1-0-2125efa016ef@flygoat.com/
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/log/
[3]: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/log/?h=clk-next
[4]: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git/log/?h=for-next
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
Changes in v9:
- dt-bindings: soc: mobileye: remove useless labels in example.
- dt-bindings: pinctrl: drop patch applied to pinctrl-next [4].
- clk:
- Kconfig: depend on "OF || COMPILE_TEST" rather than "OF".
- fix includes; add <linux/errno.h> and <linux/overflow.h>.
- eq5c_pll->index made unsigned.
- eq5c_pll->reg renamed to reg64; remove associated comment.
- probe(): remove "np" local variable.
- probe(): remove useless else in "else if".
- probe(): use dev_warn() rather than dev_err().
- probe() and init(): i made unsigned.
- probe() and init(): use readq() to read r0 and r1.
- init(): simplify error handling of of_property_match_string().
- init(): fail if parsing registers or clk registering errored out,
previously we kept going. Use pr_err() rather than pr_warn().
- init(): use %pe to print clk_hw_register_*() return value.
- reset:
- fix includes.
- replace "_withlock" prefix by "_locked".
- add units to poll constants, introduce delay constants to avoid
magic values.
- eq5r_busy_wait_locked(): use readl_poll_timeout() helper.
- introduce ID mask constants for domain+offset; exploit FIELD_GET()
and FIELD_PREP().
- add missing breaks in default case of switches.
- probe(): use hweight32() instead of __builtin_popcount().
- probe(): make i unsigned.
- probe(): use dev_err_probe().
- remove newline before builtin_platform_driver().
- pinctrl:
- Kconfig: remove useless OF dependency.
- fix includes.
- introduce drive-strength mask constant (EQ5P_DS_MASK) to avoid magic
numbers littering code.
- eq5p_pinconf_get(): do not forward-declare function.
- replace eq5p_function struct by generic pinfunction struct; allows
removing custom FUNCTION() macro.
- format gpio_groups[] strings, 8 by line and align columns.
- eq5p_pinctrl_pin_dbg_show(): remove useless arg assignment.
- eq5p_pinctrl_pin_dbg_show(): reverse if logic to avoid NOT.
- eq5p_pinmux_set_mux(): remove __func__ in dev_dbg().
- eq5p_pinmux_set_mux(): in value computation, use mask rather than
U32_MAX.
- eq5p_pinconf_set_drive_strength(): explicit max value is 0b11.
- add missing MODULE_DEVICE_TABLE(of, eq5p_match).
- remove newline before builtin_platform_driver().
- Link to v8: https://lore.kernel.org/r/20240227-mbly-clk-v8-0-c57fbda7664a@bootlin.com
Changes in v8:
- clk: drop two clk subsystem patches, clk dt-bindings and reset
dt-bindings (4 patches taken into clk-next [3]).
- clk: Kconfig: fix help block indent.
- clk: fix #includes and whitespace.
- clk: add comment to explicit error conditions at start of probe.
- clk: fix error checking of devm_platform_ioremap_resource_byname() and
do not shadow the error.
- clk: if parsing registers fail, put error in clk rather than keeping
the EPROBE_DEFER set at init.
- clk: use dev_err_probe() on clk_hw_register_*() failure in probe.
- Link to v7: https://lore.kernel.org/r/20240221-mbly-clk-v7-0-31d4ce3630c3@bootlin.com
Changes in v7:
- pinctrl: use dev_err_probe() and lower first letter of messages.
- Move all MAINTAINERS changes to a separate patch aimed at the MIPS
tree. This means clk/reset/pinctrl can take patches independently.
- Apply two Reviewed-by: Linus Walleij.
- Link to v6: https://lore.kernel.org/r/20240212-mbly-clk-v6-0-c46fa1f93839@bootlin.com
Changes in v6:
- bindings/clk: remove minItems in reg.
- bindings/reset: remove minItems in reg.
- bindings/syscon: unify quotes (use single quotes everywhere).
- bindings: apply three Reviewed-By tags from Krzysztof.
- Rebased onto v6.8-rc5. No related changes. Tested on EyeQ5 hardware.
- Link to v5: https://lore.kernel.org/r/20240209-mbly-clk-v5-0-f094ee5e918a@bootlin.com
Changes in v5:
- pinctrl: fix pin/offset distinction, add eq5p_pin_to_offset() helper,
rename eq5p_pin_offset_to_bank() to eq5p_pin_to_bank(), rename
eq5p_readl_bit() to eq5p_test_bit(), remove old <linux/mfd/syscon.h>
include, add defensive check in eq5p_test_bit().
- dt-bindings/MIPS: OLB example (dt-bindings) and devicetree: fix
ordering of nodes and properties, fix register casing.
- dt-bindings: add pin group node example to OLB dt-bindings.
- MIPS: squashed "MIPS: mobileye: eyeq5: add reset properties to UARTs"
into "MIPS: mobileye: eyeq5: add OLB reset controller node".
- MIPS: squashed "MIPS: mobileye: eyeq5: add pinctrl properties to UART
nodes" into "MIPS: mobileye: eyeq5: add pinctrl node & pinmux
function nodes".
- MIPS: rebased onto V7 of [0], meaning we now introduce the OLB syscon
node in DT in this series rather than modifying it.
- Apply Reviewed-by from Rob onto "dt-bindings: pinctrl:
mobileye,eyeq5-pinctrl: add bindings".
- dt-bindings: Drop "dt-bindings: pinctrl: allow pin controller device
without unit address".
- dt-bindings: I did NOT apply Krzysztof's Reviewed-By trailers from v3
as I am not sure he acked the changes made in V4.
- Link to v4: https://lore.kernel.org/r/20240131-mbly-clk-v4-0-bcd00510d6a0@bootlin.com
Changes in v4:
- Have the three drivers access MMIO directly rather than through the
syscon & regmap.
- pinctrl: Make the pin controller handle both banks using a single
instance.
- pinctrl/dt-bindings: Add if/else for each function, to strictly define
possible functions.
- clk: Changing to direct MMIO means we can use
clk_hw_register_divider_table_parent_hw() for the OSPI table-based
divider clock.
- Use builtin_platform_driver() for platform driver registering instead
of manual initcalls.
- reset: follow Philipp & Krzysztof's feedback:
- Use container_of() to get private struct.
- Use '_withlock' suffix instead of the underscore prefix.
- Use udelay() instead of the non-standard __udelay().
- Remove useless checks.
- Use mutex guards.
- Remove the ->reset() implementation.
- Use devres variants for kzalloc() and reset_controller_register().
- Other small changes following feedback from reviewers. dt-bindings
whitespace for pinctrl.yaml, fix pinctrl driver dt-bindings
description, improve clk driver commit header, etc.
- Link to v3: https://lore.kernel.org/r/20240123-mbly-clk-v3-0-392b010b8281@bootlin.com
Changes in v3:
- Unified the three series into one.
- clk: split driver into two for clocks registered at of_clk_init() and
clocks registered at platform device probe.
- reset/bindings: drop reset dt-bindings header & add comment in driver
to document known valid resets in each domain.
- pinctrl/bindings: fix pinctrl.yaml to allow non unit addresses for pin
controller devices.
- all/bindings: remove possibility to use `mobileye,olb` phandle to get
syscon. All three drivers use their parent node as syscon/regmap.
- MIPS/bindings: fix bindings for OLB. Have single example in parent,
removing all examples in child.
- all: drop the "probed" logs.
- Link to v2: https://lore.kernel.org/r/20231227-mbly-clk-v2-0-a05db63c380f@bootlin.com
Changes in v2:
- Drop [PATCH 1/5] that was taken by Stephen for clk-next.
- Add accuracy support to fixed-factor that is enabled with a flag.
Register prototypes were added to exploit this feature.
- Add fw_name support to fixed-factor. This allows pointing to parent
clocks using the value in `clock-names` in the DT. Register
prototypes were added for that.
- Bindings were modified to be less dumb: a binding was added for OLB
and the clock-controller is a child property of it. Removed the
possibility of pointing to OLB using a phandle. $nodename is the
generic `clock-controller` and not custom `clocks`. Fix dt-bindings
examples.
- Fix commit message for the driver patch. Add details, remove useless
fluff.
- Squash both driver commits together.
- Declare a platform_driver instead of using CLK_OF_DECLARE_DRIVER. This
also means using `dev_*` for logging, removing `pr_fmt`. We add a
pointer to device in the private structure.
- Use fixed-factor instead of fixed-rate for PLLs. We don't grab a
reference to the parent clk, instead using newly added fixed-factor
register prototypes and fwname.
- NULL is not an error when registering PLLs anymore.
- Now checking the return value of of_clk_add_hw_provider for errors.
- Fix includes.
- Remove defensive conditional at start of eq5c_pll_parse_registers.
- Rename clk_hw_to_ospi_priv to clk_to_priv to avoid confusion: it is
not part of the clk_hw_* family of symbols.
- Fix negative returns in eq5c_ospi_div_set_rate. It was a typo
highlighted by Stephen Boyd.
- Declare eq5c_ospi_div_ops as static.
- In devicetree, move the OLB node prior to the UARTs, as platform
device probe scheduling is dependent on devicetree ordering. This is
required to declare the driver as a platform driver, else it
CLK_OF_DECLARE_DRIVER is required.
- In device, create a core0-timer-clk fixed clock to feed to the GIC
timer. It requires a clock earlier than platform bus type init.
- Link to v1: https://lore.kernel.org/r/20231218-mbly-clk-v1-0-44ce54108f06@bootlin.com
---
Théo Lebrun (9):
dt-bindings: soc: mobileye: add EyeQ5 OLB system controller
clk: eyeq5: add platform driver, and init routine at of_clk_init()
reset: eyeq5: add platform driver
pinctrl: eyeq5: add platform driver
MAINTAINERS: Map OLB files to Mobileye SoCs
MIPS: mobileye: eyeq5: add OLB syscon node
MIPS: mobileye: eyeq5: use OLB clocks controller node
MIPS: mobileye: eyeq5: add OLB reset controller node
MIPS: mobileye: eyeq5: add pinctrl node & pinmux function nodes
.../bindings/soc/mobileye/mobileye,eyeq5-olb.yaml | 94 ++++
MAINTAINERS | 8 +
.../{eyeq5-fixed-clocks.dtsi => eyeq5-clocks.dtsi} | 54 +-
arch/mips/boot/dts/mobileye/eyeq5-pins.dtsi | 125 +++++
arch/mips/boot/dts/mobileye/eyeq5.dtsi | 42 +-
drivers/clk/Kconfig | 11 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-eyeq5.c | 311 +++++++++++
drivers/pinctrl/Kconfig | 14 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-eyeq5.c | 579 +++++++++++++++++++++
drivers/reset/Kconfig | 12 +
drivers/reset/Makefile | 1 +
drivers/reset/reset-eyeq5.c | 361 +++++++++++++
14 files changed, 1575 insertions(+), 39 deletions(-)
---
base-commit: e4153f4be7cc7928743145684385c305dae0d2f6
change-id: 20231023-mbly-clk-87ce5c241f08
Best regards,