From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: linux-pwm@vger.kernel.org, "Jonathan Corbet" <corbet@lwn.net>,
"Jonathan Cameron" <Jonathan.Cameron@huawei.com>,
"James Clark" <james.clark@arm.com>,
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"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
Cc: kernel@pengutronix.de, linux-doc@vger.kernel.org,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
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"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-hardening@vger.kernel.org
Subject: [PATCH v6 000/164] pwm: Improve lifetime tracking for pwm_chips
Date: Wed, 14 Feb 2024 10:30:47 +0100 [thread overview]
Message-ID: <cover.1707900770.git.u.kleine-koenig@pengutronix.de> (raw)
Hello,
this is v6 of the series introducing better lifetime tracking for
pwmchips that addresses (for now theoretic) lifetime issues of pwm
chips. Addressing these is a necessary precondition to introduce chardev
support for PWMs.
Locking got more complicated due to non-sleeping chips, so I dropped
the character device patch because it got still more incomplete now.
Also I'm not yet entirely sure about patches #162 and #163 and I expect
them to change before they can go in. My plan for the next merge window
is to get the patches in up to #160. After that the addition of chardev
support (including correct locking) can continue without having to touch
the lowlevel driver. So the idea of this series is to get the driver
adaptions out of the way as this requires some cross-tree coordination.
The patches that touch files outside of drivers/pwm include:
- gpio: mvebu: Make use of devm_pwmchip_alloc() function
It already has an Ack by Linus Walleij.
- drm/bridge: ti-sn65dsi86: Make use of pwmchip_parent() accessor
- drm/bridge: ti-sn65dsi86: Make use of devm_pwmchip_alloc() function
The 2nd already has an Ack by Douglas Anderson which I tend to assume
good enough to merge this via my pwm tree, too. An Ack for the first
patch would be nice.
- leds: qcom-lpg: Make use of devm_pwmchip_alloc() function
Already has an Ack by Lee Jones.
- staging: greybus: pwm: Change prototype of helpers to prepare further changes
- staging: greybus: pwm: Make use of pwmchip_parent() accessor
- staging: greybus: pwm: Rely on pwm framework to pass a valid hwpwm
- staging: greybus: pwm: Drop unused gb_connection_set_data()
- staging: greybus: pwm: Rework how the number of PWM lines is determined
- staging: greybus: pwm: Make use of devm_pwmchip_alloc() function
The greybus patches already got an Ack by Greg Kroah-Hartman in an
earlier series, but I dropped it as the patches changed considerably.
For the patches that already have an Ack by the respective maintainers
I'll assume this is good enough to merge the patches via the pwm tree.
Please object if you don't agree. For the others an Ack with that
semantic would be nice. If you want to merge via your tree, that would
need some coordination. The adaptions depend on patches #1 - #3, so this
would involve an immutable branch or waiting until these patches reached
your tree via the mainline tree. The series rebases fine on today's
next, so at least for now there are no conflicts that git cannot resolve
automatically.
The biggest changes compared to v5 are:
- Make pwmchip_parent's parameter const
- Use pwmchip_parent also in drivers/pwm/sysfs.c and drivers/pwm/core.c
- Several bug fixes in the conversions I found during the rework
- Provide a non-devm pwmchip_alloc() function earlier (for the greybus
pwm driver)
- Increase alignment of driver private data to ARCH_DMA_MINALIGN bytes
- Split several patches to make the easier reviewable
The series is available via git at
https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git pwm-lifetime-tracking
if you want to give it a test. I'll keep this branch updated for the
feedback I get here.
Best regards
Uwe
Uwe Kleine-König (164):
pwm: Provide an inline function to get the parent device of a given
chip
pwm: Provide wrappers for storing and getting driver private data
pwm: Provide pwmchip_alloc() function and a devm variant of it
pwm: ab8500: Make use of pwmchip_parent() accessor
pwm: ab8500: Introduce a local pwm_chip variable in .probe()
pwm: ab8500: Make use of devm_pwmchip_alloc() function
pwm: apple: Make use of devm_pwmchip_alloc() function
pwm: atmel: Change prototype of a helper to prepare further changes
pwm: atmel: Make use of pwmchip_parent() accessor
pwm: atmel: Make use of devm_pwmchip_alloc() function
pwm: atmel-hlcdc: Prepare removing pwm_chip from driver data
pwm: atmel-hlcdc: Make use of devm_pwmchip_alloc() function
pwm: atmel-tcb: Make use of pwmchip_parent() accessor
pwm: atmel-tcb: Prepare removing pwm_chip from driver data
pwm: atmel-tcb: Make use of devm_pwmchip_alloc() function
pwm: bcm2835: Make use of devm_pwmchip_alloc() function
pwm: bcm-iproc: Make use of devm_pwmchip_alloc() function
pwm: bcm-kona: Make use of pwmchip_parent() accessor
pwm: bcm-kona: Make use of devm_pwmchip_alloc() function
pwm: berlin: Prepare removing pwm_chip from driver data
pwm: berlin: Make use of devm_pwmchip_alloc() function
pwm: brcmstb: Make use of devm_pwmchip_alloc() function
pwm: clk: Prepare removing pwm_chip from driver data
pwm: clk: Make use of devm_pwmchip_alloc() function
pwm: clps711x: Make use of devm_pwmchip_alloc() function
pwm: crc: Simplify code to determine the pwmchip's parent device
pwm: crc: Make use of pwmchip_parent() accessor
pwm: crc: Make use of devm_pwmchip_alloc() function
pwm: cros-ec: Change prototype of helpers to prepare further changes
pwm: cros-ec: Make use of pwmchip_parent() accessor
pwm: cros-ec: Make use of devm_pwmchip_alloc() function
pwm: dwc: Prepare removing pwm_chip from driver data
pwm: dwc: Make use of devm_pwmchip_alloc() function
pwm: dwc-core: Make use of pwmchip_parent() accessor
pwm: ep93xx: Make use of pwmchip_parent() accessor
pwm: ep93xx: Make use of devm_pwmchip_alloc() function
pwm: fsl-ftm: Change prototype of a helper to prepare further changes
pwm: fsl-ftm: Make use of pwmchip_parent() accessor
pwm: fsl-ftm: Prepare removing pwm_chip from driver data
pwm: fsl-ftm: Make use of devm_pwmchip_alloc() function
pwm: hibvt: Consistently name driver data hi_pwm_chip
pwm: hibvt: Make use of devm_pwmchip_alloc() function
pwm: img: Drop write-only variable from driver private data
pwm: img: Make use of pwmchip_parent() accessor
pwm: img: Prepare removing pwm_chip from driver data
pwm: img: Make use of devm_pwmchip_alloc() function
pwm: imx1: Make use of devm_pwmchip_alloc() function
pwm: imx27: Make use of pwmchip_parent() accessor
pwm: imx27: Make use of devm_pwmchip_alloc() function
pwm: imx-tpm: Make use of devm_pwmchip_alloc() function
pwm: intel-lgm: Make use of devm_pwmchip_alloc() function
pwm: iqs620a: Create a wrapper for converting a pwm_chip to driver
data
pwm: iqs620a: Prepare removing pwm_chip from driver data
pwm: iqs620a: Make use of devm_pwmchip_alloc() function
pwm: jz4740: Change prototype of a helper to prepare further changes
pwm: jz4740: Make use of pwmchip_parent() accessor
pwm: jz4740: Make use of devm_pwmchip_alloc() function
pwm: keembay: Make use of devm_pwmchip_alloc() function
pwm: lp3943: Make use of devm_pwmchip_alloc() function
pwm: lpc18xx-sct: Drop hardly used member from driver private data
pwm: lpc18xx-sct: Make use of pwmchip_parent() accessor
pwm: lpc18xx-sct: Prepare removing pwm_chip from driver data
pwm: lpc18xx-sct: Make use of devm_pwmchip_alloc() function
pwm: lpc32xx: Make use of devm_pwmchip_alloc() function
pwm: lpss: Make use of pwmchip_parent() accessor
pwm: lpss: Don't set driver data
pwm: lpss-*: Make use of devm_pwmchip_alloc() function
pwm: mediatek: Make use of pwmchip_parent() accessor
pwm: mediatek: Make use of devm_pwmchip_alloc() function
pwm: meson: Change prototype of a few helpers to prepare further
changes
pwm: meson: Make use of pwmchip_parent() accessor
pwm: meson: Make use of devm_pwmchip_alloc() function
pwm: microchip-core: Make use of devm_pwmchip_alloc() function
pwm: mtk-disp: Make use of pwmchip_parent() accessor
pwm: mtk-disp: Make use of devm_pwmchip_alloc() function
pwm: mxs: Make use of devm_pwmchip_alloc() function
pwm: ntxec: Make use of devm_pwmchip_alloc() function
pwm: omap-dmtimer: Make use of pwmchip_parent() accessor
pwm: omap-dmtimer: Prepare removing pwm_chip from driver data
pwm: omap-dmtimer: Make use of devm_pwmchip_alloc() function
pwm: pca9685: Prepare removing pwm_chip from driver data
pwm: pca9685: Make use of pwmchip_parent() accessor
pwm: pca9685: Make use of devm_pwmchip_alloc() function
pwm: pxa: Make use of devm_pwmchip_alloc() function
pwm: raspberrypi-poe: Make use of pwmchip_parent() accessor
pwm: raspberrypi-poe: Make use of devm_pwmchip_alloc() function
pwm: rcar: Make use of pwmchip_parent() accessor
pwm: rcar: Prepare removing pwm_chip from driver data
pwm: rcar: Make use of devm_pwmchip_alloc() function
pwm: renesas-tpu: Make use of devm_pwmchip_alloc() function
pwm: rochchip: Prepare removing pwm_chip from driver data
pwm: rockchip: Make use of devm_pwmchip_alloc() function
pwm: rz-mtu3: Make use of pwmchip_parent() accessor
pwm: rz-mtu3: Prepare removing pwm_chip from driver data
pwm: rz-mtu3: Make use of devm_pwmchip_alloc() function
pwm: samsung: Simplify code to determine the pwmchip's parent device
pwm: samsung: Change prototype of helpers to prepare further changes
pwm: samsung: Make use of pwmchip_parent() accessor
pwm: samsung: Simplify by using devm functions in probe
pwm: samsung: Simplify using dev_err_probe()
pwm: samsung: Make use of devm_pwmchip_alloc() function
pwm: sifive: Simplify code to determine the pwmchip's parent device
pwm: sifive: Prepare removing pwm_chip from driver data
pwm: sifive: Make use of pwmchip_parent() accessor
pwm: sifive: Make use of devm_pwmchip_alloc() function
pwm: sl28cpld: Make use of devm_pwmchip_alloc() function
pwm: spear: Make use of devm_pwmchip_alloc() function
pwm: sprd: Rework how the available channels are counted
pwm: sprd: Drop duplicated tracking of the parent device
pwm: sprd: Make use of devm_pwmchip_alloc() function
pwm: sti: Prepare removing pwm_chip from driver data
pwm: sti: Make use of devm_pwmchip_alloc() function
pwm: stm32: Simplify code to determine the pwmchip's parent device
pwm: stm32: Change prototype of a helper to prepare further changes
pwm: stm32: Prepare removing pwm_chip from driver data
pwm: stm32: Change prototype of helper that detects npwm to prepare
further changes
pwm: stm32: Make use of devm_pwmchip_alloc() function
pwm: stm32-lp: Simplify code to determine the pwmchip's parent device
pwm: stm32-lp: Prepare removing pwm_chip from driver data
pwm: stm32-lp: Make use of pwmchip_parent() accessor
pwm: stm32-lp: Make use of devm_pwmchip_alloc() function
pwm: stmpe: Make use of pwmchip_parent() accessor
pwm: stmpe: Make use of devm_pwmchip_alloc() function
pwm: sun4i: Make use of pwmchip_parent() accessor
pwm: sun4i: Prepare removing pwm_chip from driver data
pwm: sun4i: Consistently name driver data sun4ichip
pwm: sun4i: Make use of devm_pwmchip_alloc() function
pwm: sunplus: Make use of devm_pwmchip_alloc() function
pwm: tegra: Drop duplicated tracking of the parent device
pwm: tegra: Prepare removing pwm_chip from driver data
pwm: tegra: Make use of devm_pwmchip_alloc() function
pwm: tiecap: Simplify code to determine the pwmchip's parent device
pwm: tiecap: Change prototype of helpers to prepare further changes
pwm: tiecap: Make use of pwmchip_parent() accessor
pwm: tiecap: Make use of devm_pwmchip_alloc() function
pwm: tiehrpwm: Simplify code to determine the pwmchip's parent device
pwm: tiehrpwm: Change prototype of helpers to prepare further changes
pwm: tiehrpwm: Make use of pwmchip_parent() accessor
pwm: tiehrpwm: Make use of devm_pwmchip_alloc() function
pwm: twl: Make use of pwmchip_parent() accessor
pwm: twl: Make use of devm_pwmchip_alloc() function
pwm: twl-led: Make use of pwmchip_parent() accessor
pwm: twl-led: Make use of devm_pwmchip_alloc() function
pwm: visconti: Make use of devm_pwmchip_alloc() function
pwm: vt8500: Change prototype of a helper to prepare further changes
pwm: vt8500: Introduce a local pwm_chip variable in .probe()
pwm: vt8500: Make use of pwmchip_parent() accessor
pwm: vt8500: Make use of devm_pwmchip_alloc() function
pwm: xilinx: Prepare removing pwm_chip from driver data
pwm: xilinx: Make use of devm_pwmchip_alloc() function
gpio: mvebu: Make use of devm_pwmchip_alloc() function
drm/bridge: ti-sn65dsi86: Make use of pwmchip_parent() accessor
drm/bridge: ti-sn65dsi86: Make use of devm_pwmchip_alloc() function
leds: qcom-lpg: Make use of devm_pwmchip_alloc() function
staging: greybus: pwm: Change prototype of helpers to prepare further
changes
staging: greybus: pwm: Make use of pwmchip_parent() accessor
staging: greybus: pwm: Rely on pwm framework to pass a valid hwpwm
staging: greybus: pwm: Drop unused gb_connection_set_data()
staging: greybus: pwm: Rework how the number of PWM lines is
determined
staging: greybus: pwm: Make use of devm_pwmchip_alloc() function
pwm: Ensure that pwm_chips are allocated using pwmchip_alloc()
pwm: Ensure a struct pwm has the same lifetime as its pwm_chip
pwm: Ensure the memory backing a PWM chip isn't freed while used
pwm: Make pwmchip_[sg]et_drvdata() a wrapper around dev_set_drvdata()
.../driver-api/driver-model/devres.rst | 1 +
Documentation/driver-api/pwm.rst | 11 +-
drivers/gpio/gpio-mvebu.c | 18 +-
drivers/gpu/drm/bridge/ti-sn65dsi86.c | 31 +--
drivers/leds/rgb/leds-qcom-lpg.c | 16 +-
drivers/pinctrl/intel/pinctrl-intel.c | 6 +-
drivers/pwm/Kconfig | 4 -
drivers/pwm/Makefile | 3 +-
drivers/pwm/core.c | 184 +++++++++++++-----
drivers/pwm/pwm-ab8500.c | 36 ++--
drivers/pwm/pwm-apple.c | 18 +-
drivers/pwm/pwm-atmel-hlcdc.c | 37 ++--
drivers/pwm/pwm-atmel-tcb.c | 32 +--
drivers/pwm/pwm-atmel.c | 34 ++--
drivers/pwm/pwm-bcm-iproc.c | 19 +-
drivers/pwm/pwm-bcm-kona.c | 23 ++-
drivers/pwm/pwm-bcm2835.c | 19 +-
drivers/pwm/pwm-berlin.c | 29 +--
drivers/pwm/pwm-brcmstb.c | 17 +-
drivers/pwm/pwm-clk.c | 27 +--
drivers/pwm/pwm-clps711x.c | 17 +-
drivers/pwm/pwm-crc.c | 22 +--
drivers/pwm/pwm-cros-ec.c | 58 +++---
drivers/pwm/pwm-dwc-core.c | 26 +--
drivers/pwm/pwm-dwc.c | 17 +-
drivers/pwm/pwm-dwc.h | 9 +-
drivers/pwm/pwm-ep93xx.c | 21 +-
drivers/pwm/pwm-fsl-ftm.c | 49 ++---
drivers/pwm/pwm-hibvt.c | 70 ++++---
drivers/pwm/pwm-img.c | 60 +++---
drivers/pwm/pwm-imx-tpm.c | 34 ++--
drivers/pwm/pwm-imx1.c | 20 +-
drivers/pwm/pwm-imx27.c | 26 +--
drivers/pwm/pwm-intel-lgm.c | 17 +-
drivers/pwm/pwm-iqs620a.c | 30 +--
drivers/pwm/pwm-jz4740.c | 36 ++--
drivers/pwm/pwm-keembay.c | 17 +-
drivers/pwm/pwm-lp3943.c | 17 +-
drivers/pwm/pwm-lpc18xx-sct.c | 34 ++--
drivers/pwm/pwm-lpc32xx.c | 21 +-
drivers/pwm/pwm-lpss-pci.c | 10 +-
drivers/pwm/pwm-lpss-platform.c | 10 +-
drivers/pwm/pwm-lpss.c | 34 ++--
drivers/pwm/pwm-lpss.h | 1 -
drivers/pwm/pwm-mediatek.c | 29 +--
drivers/pwm/pwm-meson.c | 57 +++---
drivers/pwm/pwm-microchip-core.c | 17 +-
drivers/pwm/pwm-mtk-disp.c | 25 ++-
drivers/pwm/pwm-mxs.c | 32 +--
drivers/pwm/pwm-ntxec.c | 14 +-
drivers/pwm/pwm-omap-dmtimer.c | 47 +++--
drivers/pwm/pwm-pca9685.c | 161 +++++++--------
drivers/pwm/pwm-pxa.c | 21 +-
drivers/pwm/pwm-raspberrypi-poe.c | 20 +-
drivers/pwm/pwm-rcar.c | 27 ++-
drivers/pwm/pwm-renesas-tpu.c | 20 +-
drivers/pwm/pwm-rockchip.c | 24 +--
drivers/pwm/pwm-rz-mtu3.c | 60 +++---
drivers/pwm/pwm-samsung.c | 94 ++++-----
drivers/pwm/pwm-sifive.c | 30 +--
drivers/pwm/pwm-sl28cpld.c | 13 +-
drivers/pwm/pwm-spear.c | 18 +-
drivers/pwm/pwm-sprd.c | 58 +++---
drivers/pwm/pwm-sti.c | 61 +++---
drivers/pwm/pwm-stm32-lp.c | 31 ++-
drivers/pwm/pwm-stm32.c | 56 +++---
drivers/pwm/pwm-stmpe.c | 58 +++---
drivers/pwm/pwm-sun4i.c | 100 +++++-----
drivers/pwm/pwm-sunplus.c | 17 +-
drivers/pwm/pwm-tegra.c | 50 ++---
drivers/pwm/pwm-tiecap.c | 55 +++---
drivers/pwm/pwm-tiehrpwm.c | 72 +++----
drivers/pwm/pwm-twl-led.c | 55 +++---
drivers/pwm/pwm-twl.c | 50 +++--
drivers/pwm/pwm-visconti.c | 17 +-
drivers/pwm/pwm-vt8500.c | 43 ++--
drivers/pwm/pwm-xilinx.c | 34 ++--
drivers/pwm/sysfs.c | 45 +----
drivers/staging/greybus/pwm.c | 133 ++++++-------
include/linux/platform_data/x86/pwm-lpss.h | 4 +-
include/linux/pwm.h | 56 ++++--
81 files changed, 1502 insertions(+), 1423 deletions(-)
base-commit: ab105bfee27776dd946f8003d1e895fbf7674a3f
--
2.43.0
next reply other threads:[~2024-02-14 9:34 UTC|newest]
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2024-02-14 9:30 Uwe Kleine-König [this message]
2024-02-14 9:33 ` [PATCH v6 162/164] pwm: Ensure a struct pwm has the same lifetime as its pwm_chip Uwe Kleine-König
2024-02-15 11:46 ` [PATCH v6 000/164] pwm: Improve lifetime tracking for pwm_chips Uwe Kleine-König
2024-03-25 1:54 ` patchwork-bot+chrome-platform
2024-03-25 2:13 ` patchwork-bot+chrome-platform
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