This commit introduces 2 new fields in the onewire_master_s struct:
uint64_t selected_rom,
uint64_t *available_roms.
The key point behind this is to allow onewire_search to capture all
devices on the bus into the kernel struct. While this commit is keeping
the old API (for the sake of not messing everything up), you don't have
to reimplement the search of all roms in very strange ways
(such as custom callbacks into the userspace).
Instead of that, a generic ioctl (only a function to be called from
the device driver) was implemented, that searches
the bus (for a particular 1wire family), saves it and then copies it
in a standard way to your application. The ioctl is called
ONEWIREIOC_GETFAMILYROMS.
Also as 1wire can interface multiple devices, a API telling the
driver which ROM to interface was missing, this commit fixes
this with the ONEWIREIOC_SETROM call.
The example usage is you first get all the devices on the bus
using ONEWIREIOC_GETFAMILYROMS. In your application, you choose
the correct device you want to talk to. Then you call
ONEWIREIOC_SETROM. And then writes, reads, ...
Signed-off-by: Stepan Pressl <pressl.stepan@gmail.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>
Gregory Nutt has submitted the SGA
Haltian Ltd has submitted the SGA
Hexagon AB has submitted the SGA
as a result we can migrate the licenses to Apache.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
The following changes where added.
- Removes dependency to slave structure. Selecting a device on the bus only
requires the unique romcode.
- Make search operation mutual exclusive on the bus. This is necessary to
prevent another driver instance from making a transition on the bus at
the same time.
- Skip also rom when only 1 slave is expected on the bus. Physical
connected devuce should be indicated by the maxslave paramter during
initializing, not the reigstered slaves.
- Fixes some compiler warnings in existing ds28e17 driver.
Signed-off-by: Marco Krahl <ocram.lhark@gmail.com>
drivers/1wire: add PM hooks and unlink support to sht21 sensor (allowing hot-swappable I2C bus from 1-wire converter)
* drivers/1wire: add PM hook to 1wire bus
* drivers/1wire/ds28e17.c: i2c instance must be zeroed
* drivers/sht21: add unlink support
Unlike most other unlink implementations in NuttX drivers, this one
does not allow any I2C operations after unlink, making it possible to
deallocate the I2C bus.
Approved-by: Gregory Nutt <gnutt@nuttx.org>
Squashed commit of the following:
Author: Gregory Nutt <gnutt@nuttx.org>
Some cosmetic changes from coding style review.
Author: Juha Niskanen <juha.niskanen@haltian.com>
drivers/1wire: add 1-wire subsystem and ds28e17 driver
