Re: [PATCH v3 0/6] Add support for software nodes to gpiolib

[Dmitry Torokhov]

On Fri, Nov 11, 2022 at 10:49:32PM +0100, Bartosz Golaszewski wrote:
> On Wed, Nov 9, 2022 at 8:30 PM Dmitry Torokhov
> <dmitry.torokhov@xxxxxxxxx> wrote:
> >
> > This series attempts to add support for software nodes to gpiolib, using
> > software node references. This allows us to convert more drivers to the
> > generic device properties and drop support for custom platform data.
> >
> > To describe a GPIO via software nodes we can create the following data
> > items:
> >
> > /* Node representing the GPIO controller/GPIO bank */
> > static const struct software_node gpio_bank_b_node = {
> >         .name = "B",
> > };
> >
> > /*
> >  * Properties that will be assigned to a software node assigned to
> >  * the device that used platform data.
> >  */
> > static const struct property_entry simone_key_enter_props[] = {
> >         PROPERTY_ENTRY_U32("linux,code", KEY_ENTER),
> >         PROPERTY_ENTRY_STRING("label", "enter"),
> >         PROPERTY_ENTRY_REF("gpios", &gpio_bank_b_node, 123, GPIO_ACTIVE_LOW),
> >         { }
> > };
> >
> > The code in gpiolib handling software nodes uses the name in the
> > software node representing GPIO controller to locate the actual instance
> > of GPIO controller.
> >
> > To: Linus Walleij <linus.walleij@xxxxxxxxxx>
> > To: Bartosz Golaszewski <brgl@xxxxxxxx>
> > To: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> > Cc: linux-gpio@xxxxxxxxxxxxxxx
> > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > Cc: linux-acpi@xxxxxxxxxxxxxxx
> >
> > ---
> > Changes in v3:
> > - Addressed more Andy's comments
> > - Link to v2: https://lore.kernel.org/r/20221031-gpiolib-swnode-v2-0-81f55af5fa0e@xxxxxxxxx
> >
> > Changes in v2:
> > - reworked the series to be independent of other in-flight patches.
> >   That meant keeping devm_gpiod_get_from_of_node() for now.
> > - removed handling of secondary nodes, it deserves a separate patch
> >   series
> > - fixed refcounting when handling swnodes (Andy)
> > - added include/linux/gpio/property.h with PROPERTY_ENTRY_GPIO (Andy)
> > - addressed most of the rest of Andy's comments
> > - collected reviewed-by and acked-by
> > - Link to v1: https://lore.kernel.org/r/20221031-gpiolib-swnode-v1-0-a0ab48d229c7@xxxxxxxxx
> >
> > ---
> > Dmitry Torokhov (6):
> >       gpiolib: of: change of_find_gpio() to accept device node
> >       gpiolib: acpi: change acpi_find_gpio() to accept firmware node
> >       gpiolib: acpi: teach acpi_find_gpio() to handle data-only nodes
> >       gpiolib: acpi: avoid leaking ACPI details into upper gpiolib layers
> >       gpiolib: consolidate GPIO lookups
> >       gpiolib: add support for software nodes
> >
> >  drivers/gpio/Makefile         |   1 +
> >  drivers/gpio/gpiolib-acpi.c   | 132 +++++++++++++++-----------
> >  drivers/gpio/gpiolib-acpi.h   |  54 +----------
> >  drivers/gpio/gpiolib-of.c     |   7 +-
> >  drivers/gpio/gpiolib-of.h     |   4 +-
> >  drivers/gpio/gpiolib-swnode.c | 123 +++++++++++++++++++++++++
> >  drivers/gpio/gpiolib-swnode.h |  14 +++
> >  drivers/gpio/gpiolib.c        | 209 ++++++++++++++++--------------------------
> >  include/linux/gpio/property.h |  11 +++
> >  9 files changed, 315 insertions(+), 240 deletions(-)
> > ---
> > base-commit: b6fc3fddade7a194bd141a49f2689e50f796ef46
> > change-id: 20221031-gpiolib-swnode-948203f49b23
> >
> > --
> > Dmitry
> >
> 
> Hi Dmitry,
> 
> What are the prerequisites of this series as it doesn't apply to my
> gpio/for-next branch?

Hi Bart,

No prereqs, must be just a small context changes now that you merged
leds changes and the patch removing devm_fwnode_get_[index_]gpiod_from_child().

Let me rebase it on top of latest next tree and resend.

-- 
Dmitry