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Message-ID: <8febdf39-ea1a-4e03-afc8-bd6e0c3b8624@redhat.com> Date: Wed, 4 Sep 2024 11:26:40 +0200 From: Hans de Goede <hdegoede@...hat.com> To: Sebastian Reichel <sre@...nel.org> Cc: Thomas Weißschuh <linux@...ssschuh.net>, MyungJoo Ham <myungjoo.ham@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Heikki Krogerus <heikki.krogerus@...ux.intel.com>, Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>, Enric Balletbo Serra <enric.balletbo@...labora.com>, Andrey Smirnov <andrew.smirnov@...il.com>, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, linux-phy@...ts.infradead.org Subject: Re: [PATCH 0/6] power: supply: Change usb_types from an array into a bitmask Hi, On 9/4/24 12:04 AM, Sebastian Reichel wrote: > Hi, > > On Sat, Aug 31, 2024 at 04:20:33PM GMT, Hans de Goede wrote: >> When support for the "charge_behaviour" property was added the list of >> available values was made a bitmask in power_supply_desc. >> >> "usb_types" is very similar in that: >> 1. It is an enum >> 2. The list of available values is stored in power_supply_desc >> 3. When shown it shows all available values, with the active one surrounded >> by square brackets. >> >> But "usb_types" uses an array with valid enum values instead of a bitmask. >> This uses more memory then the bitmap approach and it makes it impossible >> to have a shared generic show() function for properties which show >> available values, with the active one surrounded by square brackets. >> >> This patch-set moves "usb_types" over to a bitmask in power_supply_desc >> to indicate the available values. >> >> Patches 1 - 3: >> >> It turns out that the ucs1002-power driver contained a surprise in that >> it supports writing to "usb_type" even though the ABI doc says it is >> read-only. Since we cannot break shipped userspace API, the ship has sailed >> on this one. The first patch documents that writing "usb_type" is allowed, >> but only for power-supply devices which provide USB power rather then >> consume it. >> >> Enum properties accept writing the FOO_TEXT[] string values, passing >> the enum value matching the FOO_TEXT entry to set_property(), the second >> patch adjusts ucs1002_set_usb_type() to directly accept enum values. >> >> The rt9467 driver was another driver which allowed writing to "usb_type" >> but there the use made no sense, so it is simply dropped. >> >> Patches 4 - 6: >> >> These patches implement the actual moving of usb_types to a bitmask. >> >> Patch 6 is a bit of a bigbang patch moving all drivers over in one go, >> touching a couple of drivers outside drivers/power/supply: 1 in >> drivers/extcon/ 1 in drivers/phy/ and 5 in drivers/usb/typec/ since >> the changes outside of drivers/power/supply are small I've chosen to >> make all the changes in one go rather then have some sort of >> intermediate state where both ways are supported. >> >> For merging this I believe it would be best for an immutable branch / tag >> to be created on the linux-power-supply tree and then send a pull-request >> to the extcon, phy and usb-typec maintainers to merge the tag. >> >> extcon, phy and typec maintainers can you please give your Acked-by for >> patch 6/6 for merging these changes through the linux-power-supply tree? >> >> This set is based on top of the latest linux-power-supply/for-next. > > As we are quite close before the merge window I just took it with > just the Ack from Greg. The changes in PHY and Extcon are quite > small. Great, thank you. Regards, Hans > I did prepare an immutable branch in case it is needed by > any of the other involved trees: > > The following changes since commit 8400291e289ee6b2bf9779ff1c83a291501f017b: > > Linux 6.11-rc1 (2024-07-28 14:19:55 -0700) > > are available in the Git repository at: > > https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git tags/ib-psy-usb-types-signed > > for you to fetch changes up to 364ea7ccaef917a3068236a19a4b31a0623b561a: > > power: supply: Change usb_types from an array into a bitmask (2024-09-03 23:20:28 +0200) > > ---------------------------------------------------------------- > Immutable branch for usb_types change for v6.12 > > Changing usb_types type from array to bitmap in the power_supply_desc > struct requires updating power-supply drivers living in different > subsystem, so it is handled via an immutable branch. > > ---------------------------------------------------------------- > Hans de Goede (6): > power: supply: "usb_type" property may be written to > power: supply: ucs1002: Adjust ucs1002_set_usb_type() to accept string values > power: supply: rt9467-charger: Remove "usb_type" property write support > power: supply: sysfs: Add power_supply_show_enum_with_available() helper > power: supply: sysfs: Move power_supply_show_enum_with_available() up > power: supply: Change usb_types from an array into a bitmask > > Documentation/ABI/testing/sysfs-class-power | 7 ++- > drivers/extcon/extcon-intel-cht-wc.c | 15 ++---- > drivers/phy/ti/phy-tusb1210.c | 11 ++--- > drivers/power/supply/axp20x_usb_power.c | 13 ++--- > drivers/power/supply/bq256xx_charger.c | 15 ++---- > drivers/power/supply/cros_usbpd-charger.c | 22 +++------ > drivers/power/supply/lenovo_yoga_c630_battery.c | 7 +-- > drivers/power/supply/mp2629_charger.c | 15 ++---- > drivers/power/supply/mt6360_charger.c | 13 ++--- > drivers/power/supply/mt6370-charger.c | 13 ++--- > drivers/power/supply/power_supply_core.c | 4 -- > drivers/power/supply/power_supply_sysfs.c | 66 ++++++++----------------- > drivers/power/supply/qcom_battmgr.c | 37 +++++++------- > drivers/power/supply/qcom_pmi8998_charger.c | 13 ++--- > drivers/power/supply/rk817_charger.c | 9 +--- > drivers/power/supply/rn5t618_power.c | 13 ++--- > drivers/power/supply/rt9467-charger.c | 16 ++---- > drivers/power/supply/rt9471.c | 15 ++---- > drivers/power/supply/ucs1002_power.c | 26 +++++----- > drivers/usb/typec/anx7411.c | 11 ++--- > drivers/usb/typec/rt1719.c | 11 ++--- > drivers/usb/typec/tcpm/tcpm.c | 11 ++--- > drivers/usb/typec/tipd/core.c | 9 +--- > drivers/usb/typec/ucsi/psy.c | 11 ++--- > include/linux/power_supply.h | 3 +- > 25 files changed, 132 insertions(+), 254 deletions(-) > > -- Sebastian
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