From patchwork Wed Feb 21 18:22:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Th=C3=A9o_Lebrun?= X-Patchwork-Id: 774689 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C6EE84FD8; Wed, 21 Feb 2024 18:22:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.197 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708539737; cv=none; b=kp1YPF/LslHebxwqexeNZCzLX8pQFZ/Qs6oEyWvkahdX0R3AV5WdrgN3+uCOS9aEufLNkzWzHR3N5NYnG3RIKLdoPSXMiAApnbuGhzEa4BgETtgWNWsQvLPrE2M2J2VegB7Y0EnUV/aUzn6ugz3llMTk0f3YQ2qSdr1rWOH8T80= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708539737; c=relaxed/simple; bh=633I1E2LHcb6ImHJ2+htpqw4h6Bkm0555N9hxRvvXVA=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=r03CetstfPHjp2CtqiGdSsCuovOxRh1x5TgBSeHK9OqLNAtFIfGMX3HNP8+M9iylMdX9J97QHxS8a6aPiz/6koGTr3++t6FxNwhjO5ueGjJ2bEK+8gdvXP25f1dSxH47qaCP+dITYeRHHaCLzsdQXuFdiIcjxc07Ro4R22/506I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=GXgPn8V2; arc=none smtp.client-ip=217.70.183.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="GXgPn8V2" Received: by mail.gandi.net (Postfix) with ESMTPSA id EE27F1C0008; Wed, 21 Feb 2024 18:22:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708539732; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=IpJVacaKh6VV2SUgh3k36CE+SCXTY9oO9NzwW+GWlw4=; b=GXgPn8V29n+V5DRd0NScpfGpzzyV+HzmMjfrDgeIGeud9ZSQbXP0bDWj2vEFfcjPrhrSsY CvS4b1qFLMMsjgobGY6J7fd8abiCTTvSJJN38x2uflDdTupvZ3pwDrgJ/IpjfhtcNIKhAG XYThlSBr5lTMBUSUuXvqL3INC+4gJG8MkocIJr8DYvXvsNsIzo6ajNebzuFe45mnT09sdW COreEE5VIrNhLxtr61zSRdwCtzUg9Vxt4ctWKpbhNgTegwMdaFeeW42AT7BL7QunEywXBq 3bCVO0QlLjd+0+iDDVHMq0TEMLZOCtRSCrCPcXTv0IhwmveP3rVjPiXD5XY16g== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Subject: [PATCH v7 00/14] Add support for Mobileye EyeQ5 system controller Date: Wed, 21 Feb 2024 19:22:08 +0100 Message-Id: <20240221-mbly-clk-v7-0-31d4ce3630c3@bootlin.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAFA/1mUC/3XQwU7EIBAG4FfZcBYzwwAFT76H8QAUXGK3Ne2mc bPpu0vXmLJWDxyG8P38cGVTHHOc2NPhysY45ykPfRmahwMLR9e/RZ7bMjMBgrAsfvLdhYfunZs mRBWExASGleMfY0z58xb18lrmY57Ow3i5Jc+47n6HIMEWMiMHbrRPiLZpkeKzH4Zzl/vHMJzW1 H+Ipwiq1d766P4kAs0vImXpKxFMAn1H1rKz2AoK0VRUFOrKXV5TIANpT+mHSsD6g2YqlKzwgOC NMLinsqKEFZXrG0MLoBBa7WBP1UYF2IqqQhNYGaOKFo3bU11RFBXVhQapk8NkyZC9p8uyfAGc6 bReLwIAAA== To: Gregory CLEMENT , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer , Linus Walleij , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= , Philipp Zabel Cc: Vladimir Kondratiev , linux-mips@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni , Tawfik Bayouk , linux-gpio@vger.kernel.org, =?utf-8?q?Th=C3=A9o_Lebrun?= , Krzysztof Kozlowski , Rob Herring X-Mailer: b4 0.13.0 X-GND-Sasl: theo.lebrun@bootlin.com Hi, The goal of this series is to add clk, reset and pinctrl support for the Mobileye EyeQ5 platform [0]. Control of those is grouped inside a system controller block called "OLB". About clocks, we replaced the 10 fixed clocks from the initial platform support series [0] by 10 read-only fixed-factor PLLs provided by our clock driver. We also provide one table-based divider clock for OSPI. Two PLLs (for GIC timer & UARTs) are required at of_clk_init() so those are registered first, the rest comes at platform device probe. Resets are split in three domains, all dealt with by the same device. They have some behavior differences: - We busy-wait on the first two for hardware LBIST reasons (logic built-in self-test). - Domains 0 & 2 work in a bit-per-reset fashion while domain 1 works in a register-per-reset fashion. Pin control is about controlling bias, drive strength and muxing. The latter allows two functions per pin; the first function is always GPIO while the second one is pin-dependent. There exists two banks, both handled by a single driver instance. Each pin maps to one pin group. That makes pin & group indexes the same, simplifying logic. The patch adding the system-controller dt-bindings ("dt-bindings: soc: mobileye: add EyeQ5 OLB system controller") is dependent on the three controllers dt-bindings: - dt-bindings: clock: mobileye,eyeq5-clk: add bindings - dt-bindings: reset: mobileye,eyeq5-reset: add bindings - dt-bindings: pinctrl: mobileye,eyeq5-pinctrl: add bindings The parent is v6.8-rc5 with both [1] and [0] series applied on top. Both series are in mips-next [2]. Here is the patch list, split by subsystems: - clk: [PATCH v7 01/14] clk: fixed-factor: add optional accuracy support [PATCH v7 02/14] clk: fixed-factor: add fwname-based constructor functions [PATCH v7 03/14] dt-bindings: clock: mobileye,eyeq5-clk: add bindings [PATCH v7 07/14] clk: eyeq5: add platform driver, and init routine at of_clk_init() - pinctrl: [PATCH v7 05/14] dt-bindings: pinctrl: mobileye,eyeq5-pinctrl: add bindings [PATCH v7 09/14] pinctrl: eyeq5: add platform driver - reset: [PATCH v7 04/14] dt-bindings: reset: mobileye,eyeq5-reset: add bindings [PATCH v7 08/14] reset: eyeq5: add platform driver - MIPS: (note: dependent on the [0] series) [PATCH v7 06/14] dt-bindings: soc: mobileye: add EyeQ5 OLB system controller [PATCH v7 10/14] MAINTAINERS: Map OLB files to Mobileye SoCs [PATCH v7 11/14] MIPS: mobileye: eyeq5: add OLB syscon node [PATCH v7 12/14] MIPS: mobileye: eyeq5: use OLB clocks controller node [PATCH v7 13/14] MIPS: mobileye: eyeq5: add OLB reset controller node [PATCH v7 14/14] 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/ Signed-off-by: Théo Lebrun --- 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 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 (14): 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 dt-bindings: pinctrl: mobileye,eyeq5-pinctrl: add bindings 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/clock/mobileye,eyeq5-clk.yaml | 51 ++ .../bindings/pinctrl/mobileye,eyeq5-pinctrl.yaml | 242 +++++++++ .../bindings/reset/mobileye,eyeq5-reset.yaml | 43 ++ .../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 | 289 +++++++++++ drivers/clk/clk-fixed-factor.c | 103 +++- drivers/pinctrl/Kconfig | 15 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-eyeq5.c | 577 +++++++++++++++++++++ drivers/reset/Kconfig | 12 + drivers/reset/Makefile | 1 + drivers/reset/reset-eyeq5.c | 342 ++++++++++++ include/dt-bindings/clock/mobileye,eyeq5-clk.h | 22 + include/linux/clk-provider.h | 26 +- 20 files changed, 2003 insertions(+), 56 deletions(-) --- base-commit: 96ba7d34f557251d2416ff93c205003eba3cf3db change-id: 20231023-mbly-clk-87ce5c241f08 Best regards,