The psy core and drivers currently use dev_get_drvdata() to go from a
'struct device' to its 'struct power_supply'.
This is not typesafe and or documented.
Introduce a new helper to make this pattern explicit.
Instead of using dev_get_drvdata(), use container_of_const() which
also preserves the constness.
Furthermore 'dev' does need to be dereferenced anymore and at some point
the drvdata could be reused for something else.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241210-power-supply-dev_to_psy-v2-7-9d8c9d24cfe4@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
All existing callers of power_supply_for_each_device() want to iterate
over 'struct power_supply', not 'struct device'.
The power_supply_for_each_device() forces each caller to duplicate the
logic to go from one to the other.
Introduce power_supply_for_each_psy() to simplify the callers.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241210-power-supply-dev_to_psy-v2-2-9d8c9d24cfe4@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
It is to be handled with the rest of the IP51xx/52xx family.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-7-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
On parts where there is no status register, check the Charge End
bit to set charging/not charging status. Fullness, trickle charge
status, discharging etc. cannot be determined from just this bit.
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-6-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Some parts may not have certain control bits. These bits
however may be non-essential to the system's operation,
as the default behaviour is the one we would set anyways,
or the bits are not applicable for said part (e. g. enabling
NTC on a part without an NTC pin, or one where it cannot
be disabled via registers anyways).
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-5-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
IP53xx series supports 4.4V batteries. Add support for it
to compatible parts (that have `vbat_max` set to >= 4.4 V).
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-4-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Other parts such as IP5306 may support other battery voltages and
have different constants for input voltage regulation. Allow these
to be passed from `struct ip5xxx_regfield_config`.
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-3-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
If ADC read returns an error, the return value was silently ignored,
execution continued and an uninitialized value and a return code of 0
was passed back to userspace. The only exception was
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, which bailed out correctly.
Fix returns for the other cases as well.
Fixes: 75853406fa ("power: supply: Add a driver for Injoinic power bank ICs")
Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-2-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Instead of looping through all properties known to be supported by the
psy, loop over all known properties and decide based on the return value
of power_supply_get_property() whether the property existed.
This makes the code shorter now and even more so when power supply
extensions are added.
It also simplifies the locking, as it can all happen inside
power_supply_get_property().
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-6-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The upcoming extension API will add properties which are not part of the
the power_supply_desc.
Use power_supply_has_property() so the properties from extensions are
also checked.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-5-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The upcoming extension API will add properties which are not part of the
the power_supply_desc.
Use power_supply_has_property() so the properties from extensions are
also checked.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-4-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Introduce a helper to check if a power supply implements a certain
property. It will be used by the sysfs and hwmon code to remove similar
open-coded checks.
It also paves the way for the extension API to hook into.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-3-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The function only takes a desc as parameter, align the naming.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-2-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Currently an uevent contains the same string representation of a
property as sysfs. However for POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR this
is specially formatted to indicate all possible values.
This doesn't make sense for uevents and complicates parsing.
Instead only include the currently active value in uevents.
As currently no in-tree driver uses POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR
this change is not a problem.
Soon the property will actually be used so fix the formatting before
that happens.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-1-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Charge full holds the calculated full capacity of the cell based on all
inputs from the ModelGauge m5 algorithm including empty compensation. A
new full-capacity value is calculated continuously as application
conditions change.
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
Link: https://lore.kernel.org/r/20241203-max1720x-charge-full-prop-v1-1-b02776b43f17@liebherr.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Use the device lifecycle managed work init function. This helps prevent
mistakes like canceling out of order in cleanup functions and
forgetting to canceling on error paths.
Note we move this to after the registering the power supply so that
the cancel is called before unregistering.
This was the last thing the .remove() function did, so remove that too.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241202211519.199635-5-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Use the device lifecycle managed register function. This helps prevent
mistakes like unregistering out of order in cleanup functions and
forgetting to unregister on error paths.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241202211519.199635-4-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Use device lifecycle managed memory alloc helpers. This helps
prevent mistakes like freeing out of order in cleanup functions and
forgetting to free on all error paths.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241202211519.199635-3-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This helps prevent mistakes like freeing out of order in cleanup functions
and forgetting to free on error paths.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241202211519.199635-2-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
We don't need to specify any ranges when allocating IDs so we can switch
to ida_alloc() and ida_free() instead of idr_*.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20241202211519.199635-1-afd@ti.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241202-sysfs-const-bin_attr-psy-v1-4-f846430b8b66@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241202-sysfs-const-bin_attr-psy-v1-3-f846430b8b66@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241202-sysfs-const-bin_attr-psy-v1-2-f846430b8b66@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241202-sysfs-const-bin_attr-psy-v1-1-f846430b8b66@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
core: add of based component probing
Some devices are designed and manufactured with some components having
multiple drop-in replacement options. These components are often
connected to the mainboard via ribbon cables, having the same signals
and pin assignments across all options. These may include the display
panel and touchscreen on laptops and tablets, and the trackpad on
laptops. Sometimes which component option is used in a particular device
can be detected by some firmware provided identifier, other times that
information is not available, and the kernel has to try to probe each
device.
Instead of a delicate dance between drivers and device tree quirks, this
change introduces a simple I2C component probe function. For a given
class of devices on the same I2C bus, it will go through all of them,
doing a simple I2C read transfer and see which one of them responds. It
will then enable the device that responds.
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Merge tag 'i2c-for-6.13-rc1-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c component probing support from Wolfram Sang:
"Add OF component probing.
Some devices are designed and manufactured with some components having
multiple drop-in replacement options. These components are often
connected to the mainboard via ribbon cables, having the same signals
and pin assignments across all options. These may include the display
panel and touchscreen on laptops and tablets, and the trackpad on
laptops. Sometimes which component option is used in a particular
device can be detected by some firmware provided identifier, other
times that information is not available, and the kernel has to try to
probe each device.
Instead of a delicate dance between drivers and device tree quirks,
this change introduces a simple I2C component probe function. For a
given class of devices on the same I2C bus, it will go through all of
them, doing a simple I2C read transfer and see which one of them
responds. It will then enable the device that responds"
* tag 'i2c-for-6.13-rc1-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
MAINTAINERS: fix typo in I2C OF COMPONENT PROBER
of: base: Document prefix argument for of_get_next_child_with_prefix()
i2c: Fix whitespace style issue
arm64: dts: mediatek: mt8173-elm-hana: Mark touchscreens and trackpads as fail
platform/chrome: Introduce device tree hardware prober
i2c: of-prober: Add GPIO support to simple helpers
i2c: of-prober: Add simple helpers for regulator support
i2c: Introduce OF component probe function
of: base: Add for_each_child_of_node_with_prefix()
of: dynamic: Add of_changeset_update_prop_string
- Remove unused bprintf() function
bprintf() was added with the rest of the "bin-printf" functions.
These are functions that are used by trace_printk() that allows to
quickly save the format and arguments into the ring buffer without
the expensive processing of converting numbers to ASCII. Then on
output, at a much later time, the ring buffer is read and the string
processing occurs then. The bprintf() was added for consistency but
was never used. It can be safely removed.
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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bprintf() removal from Steven Rostedt:
- Remove unused bprintf() function, that was added with the rest of the
"bin-printf" functions.
These are functions that are used by trace_printk() that allows to
quickly save the format and arguments into the ring buffer without
the expensive processing of converting numbers to ASCII. Then on
output, at a much later time, the ring buffer is read and the string
processing occurs then. The bprintf() was added for consistency but
was never used. It can be safely removed.
* tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
printf: Remove unused 'bprintf'
signals if some of the group's threads are exiting
- Fix a hang caused by ndelay() calling the wrong delay function __udelay()
- Fix a wrong offset calculation in adjtimex(2) when using ADJ_MICRO
(microsecond resolution) and a negative offset
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Merge tag 'timers_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Borislav Petkov:
- Fix a case where posix timers with a thread-group-wide target would
miss signals if some of the group's threads are exiting
- Fix a hang caused by ndelay() calling the wrong delay function
__udelay()
- Fix a wrong offset calculation in adjtimex(2) when using ADJ_MICRO
(microsecond resolution) and a negative offset
* tag 'timers_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-timers: Target group sigqueue to current task only if not exiting
delay: Fix ndelay() spuriously treated as udelay()
ntp: Remove invalid cast in time offset math
fix some Marvell Armada platforms
- Add a workaround for Hisilicon ITS erratum 162100801 which can cause some
virtual interrupts to get lost
- More platform_driver::remove() conversion
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Merge tag 'irq_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Borislav Petkov:
- Move the ->select callback to the correct ops structure in
irq-mvebu-sei to fix some Marvell Armada platforms
- Add a workaround for Hisilicon ITS erratum 162100801 which can cause
some virtual interrupts to get lost
- More platform_driver::remove() conversion
* tag 'irq_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: Switch back to struct platform_driver::remove()
irqchip/gicv3-its: Add workaround for hip09 ITS erratum 162100801
irqchip/irq-mvebu-sei: Move misplaced select() callback to SEI CP domain
by erratum 1386 so that the matching loop actually terminates instead of
going off into the weeds
- Update the boot protocol documentation to mention the fact that the
preferred address to load the kernel to is considered in the relocatable
kernel case too
- Flush the memory buffer containing the microcode patch after applying
microcode on AMD Zen1 and Zen2, to avoid unnecessary slowdowns
- Make sure the PPIN CPU feature flag is cleared on all CPUs if PPIN has been
disabled
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Merge tag 'x86_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Add a terminating zero end-element to the array describing AMD CPUs
affected by erratum 1386 so that the matching loop actually
terminates instead of going off into the weeds
- Update the boot protocol documentation to mention the fact that the
preferred address to load the kernel to is considered in the
relocatable kernel case too
- Flush the memory buffer containing the microcode patch after applying
microcode on AMD Zen1 and Zen2, to avoid unnecessary slowdowns
- Make sure the PPIN CPU feature flag is cleared on all CPUs if PPIN
has been disabled
* tag 'x86_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/CPU/AMD: Terminate the erratum_1386_microcode array
x86/Documentation: Update algo in init_size description of boot protocol
x86/microcode/AMD: Flush patch buffer mapping after application
x86/mm: Carve out INVLPG inline asm for use by others
x86/cpu: Fix PPIN initialization
The point behind strscpy() was to once and for all avoid all the
problems with 'strncpy()' and later broken "fixed" versions like
strlcpy() that just made things worse.
So strscpy not only guarantees NUL-termination (unlike strncpy), it also
doesn't do unnecessary padding at the destination. But at the same time
also avoids byte-at-a-time reads and writes by _allowing_ some extra NUL
writes - within the size, of course - so that the whole copy can be done
with word operations.
It is also stable in the face of a mutable source string: it explicitly
does not read the source buffer multiple times (so an implementation
using "strnlen()+memcpy()" would be wrong), and does not read the source
buffer past the size (like the mis-design that is strlcpy does).
Finally, the return value is designed to be simple and unambiguous: if
the string cannot be copied fully, it returns an actual negative error,
making error handling clearer and simpler (and the caller already knows
the size of the buffer). Otherwise it returns the string length of the
result.
However, there was one final stability issue that can be important to
callers: the stability of the destination buffer.
In particular, the same way we shouldn't read the source buffer more
than once, we should avoid doing multiple writes to the destination
buffer: first writing a potentially non-terminated string, and then
terminating it with NUL at the end does not result in a stable result
buffer.
Yes, it gives the right result in the end, but if the rule for the
destination buffer was that it is _always_ NUL-terminated even when
accessed concurrently with updates, the final byte of the buffer needs
to always _stay_ as a NUL byte.
[ Note that "final byte is NUL" here is literally about the final byte
in the destination array, not the terminating NUL at the end of the
string itself. There is no attempt to try to make concurrent reads and
writes give any kind of consistent string length or contents, but we
do want to guarantee that there is always at least that final
terminating NUL character at the end of the destination array if it
existed before ]
This is relevant in the kernel for the tsk->comm[] array, for example.
Even without locking (for either readers or writers), we want to know
that while the buffer contents may be garbled, it is always a valid C
string and always has a NUL character at 'comm[TASK_COMM_LEN-1]' (and
never has any "out of thin air" data).
So avoid any "copy possibly non-terminated string, and terminate later"
behavior, and write the destination buffer only once.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
bprintf() is unused. Remove it. It was added in the commit 4370aa4aa7
("vsprintf: add binary printf") but as far as I can see was never used,
unlike the other two functions in that patch.
Link: https://lore.kernel.org/20241002173147.210107-1-linux@treblig.org
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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Merge tag 'pci-v6.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI fix from Bjorn Helgaas:
- When removing a PCI device, only look up and remove a platform device
if there is an associated device node for which there could be a
platform device, to fix a merge window regression (Brian Norris)
* tag 'pci-v6.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI/pwrctrl: Unregister platform device only if one actually exists
