The pins a board publishes are visible in /dev and each can be read
through its own node, but surveying a whole board that way means an open
and two ioctls per pin, and the signal and interrupt counters the upper
half keeps are not reachable through any of them.
Adds a list of registered pins and publishes it as /proc/gpio, behind
GPIO_PROCFS: a quality of life view of the same kind as /proc/pinctrl
and /proc/reset. Every common field comes from state the upper half
already holds: the pin type, the value through go_read(), how many times
the pin has been registered for signals, and how many interrupts it has
taken. Lines carry the same key:value tokens in the same order, so the
file is machine parseable.
Lower halves may supply an optional go_describe() adding what only they
can say, such as which pad carries the line or how its trigger is
configured. It writes text into a caller supplied buffer and the upper
half owns the line, so a lower half needs no procfs knowledge. A lower
half without it is listed with the common tokens alone.
The pin type index is bounded before use: it comes from the lower half
and the name table cannot cover a type the enumeration does not define.
A pin that cannot be read reports val:- rather than a zero that would
read as a real level.
procfs_register() appends without checking for duplicates, so the entry
is claimed once for the lifetime of the system rather than whenever the
list is empty; pins come and go at run time.
The name is held in a buffer as long as the one gpio_pin_register()
accepts, so a listing always names the same string as /dev.
The pin type name table is declared without an explicit size so that the
assertion beside it compares against the enumeration and can fail; sized
as [GPIO_NPINTYPES] it would have been tautological.
Documents the entry, its tokens, and how a lower half describes a pin.
Off by default: with GPIO_PROCFS unset the list, the lock and the procfs
entry are compiled out, and go_describe() is one more member at the end
of a structure existing lower halves do not reach.
Assisted-by: Claude:claude-opus-5
Signed-off-by: Justin Hammond <justin@dynam.ac>
Permissions (Part 2)
Description:
In kernel builds, any unprivileged process running on the NuttX
device can open /dev/efuse and attempt to read/write fuse content.
Reading the fuses may provide valuable information to an attacker
controlling the user process. The write operation, in extreme cases
where the fuse blocks are not locked, may brick the device.
DISCLAIMER: I tried to be strict with the settings, better to relax them
later if it's needed.
This is part of https://github.com/apache/nuttx/issues/19410
See https://github.com/apache/nuttx/issues/19410
Compiles ok.
Signed-off-by: Catalin Visinescu <catalin_visinescu@yahoo.com>
debug.h is a NuttX-specific, non-POSIX header. Placing it in the
top-level include/ directory creates naming conflicts with external
projects that define their own debug.h.
This commit moves the canonical header to include/nuttx/debug.h,
following the NuttX convention for non-POSIX/non-standard headers,
and updates all in-tree references.
A backward-compatibility shim is left at include/debug.h that
emits a deprecation #warning and re-includes <nuttx/debug.h>,
allowing out-of-tree code to continue building while migrating.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
Add handling for GPIOC_SETDEBOUNCE to set GPIO pin debounce duration.
Add handling for GPIOC_SETMASK to enable/disable GPIO interrupt mask.
Signed-off-by: chenzihan1 <chenzihan1@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
"ioexpander/gpio.c", line 529: warning #186-D: pointless comparison of
unsigned integer with zero
if (pintype < GPIO_INPUT_PIN || pintype >= GPIO_NPINTYPES)
^
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
CC: irq/irq_initialize.c "ioexpander/gpio.c", line 386: warning #188-D: enumerated type mixed with
another type
*ptr = dev->gp_pintype;
^
Signed-off-by: guoshichao <guoshichao@xiaomi.com>
NuttX kernel should not use the syscall functions, especially after
enabling CONFIG_SCHED_INSTRUMENTATION_SYSCALL, all system functions
will be traced to backend, which will impact system performance.
Signed-off-by: chao an <anchao@xiaomi.com>
Summary:
- This commit changes spinlock APIs (spin_lock_irqsave/spin_unlock_irqrestore)
- In the previous implementation, the global spinlock (i.e. g_irq_spin) was used.
- This commit allows to use caller specific spinlock but also supports to use
g_irq_spin for backword compatibility (In this case, NULL must be specified)
Impact:
- None
Testing:
- Tested with the following configurations
- spresnse:wifi, spresense:wifi_smp
- esp32-devkitc:smp (QEMU), sabre6-quad:smp (QEMU)
- maxi-bit:smp (QEMU), sim:smp
- stm32f4discovery:wifi
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
* Simplify EINTR/ECANCEL error handling
1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx
* Unify the void cast usage
1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
arch/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
sched/ audio/ crypto/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
Documentation/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
fs/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
graphics/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
net/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
drivers/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
include/, syscall/, wireless/: Removed all references to CONFIG_DISABLE_POLL. The standard POSIX poll() can not longer be disabled.
configs/: Remove all references to CONFIG_DISABLE_POLL. Standard POSIX poll can no longer be disabled.
driver/ioexpander: Add gpio_pin_unregister function to GPIO driver
driver/ioexpander: Add pinset struct to GPIO driver for interrupt pins larger than 64
driver/ioexpander: Initialize pintype/inttype when registering ioexpander device
driver/ioexpander: Add SETPINTYPE ioctl command to the GPIO driver
Replace all usage kill() in the OS proper with nxsig_kill().
sched/signal: Add nxsig_kill() which is functionally equivalent to kill() except that it does not modify the errno variable.
PCA9555 Driver: Replace the signalling logic with a simple callback using the new definitons of ioexpander.h. This repartitioning of functionality is necessary because (1) the I/O expander driver is the lower-lower part of any driver that uses GPIOs (include the GPIO driver itself) and should not be interacting directly with the much higher level application layer. And (2) in order to be compatible with the GPIO driver (and any arbitrary upper half driver), the PCA9555 should not directly signal, but should call back into the upper half. The upper half driver that interacts directly with the application is the appropriate place to be generating signal.
