On Wed, Apr 29, 2020 at 10:26:31AM +0200, Linus Walleij wrote:
> This converts the lms283gf05 backlight driver to use GPIO
> descriptors and switches the single PXA Palm Z2 device
> over to defining these.
>
> Since the platform data was only used to convey GPIO
> information we can delete the platform data header.
>
> Notice that we define the proper active low semantics in
> the board file GPIO descriptor table (active low) and
> assert the reset line by bringing it to "1" (asserted).
>
> Cc: Marek Vasut <marex@xxxxxxx>
> Cc: Daniel Mack <daniel@xxxxxxxxxx>
> Cc: Haojian Zhuang <haojian.zhuang@xxxxxxxxx>
> Cc: Robert Jarzmik <robert.jarzmik@xxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> Marek: I saw this was written by you, are you regularly
> testing the Z2 device?
> ---
> arch/arm/mach-pxa/z2.c | 12 ++++++---
> drivers/video/backlight/lms283gf05.c | 39 +++++++++++-----------------
> include/linux/spi/lms283gf05.h | 16 ------------
> 3 files changed, 23 insertions(+), 44 deletions(-)
> delete mode 100644 include/linux/spi/lms283gf05.h
>
> diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c
> index 0e45685bcc1c..71a26b8b7d3f 100644
> --- a/drivers/video/backlight/lms283gf05.c
> +++ b/drivers/video/backlight/lms283gf05.c
> @@ -150,18 +147,12 @@ static struct lcd_ops lms_ops = {
> static int lms283gf05_probe(struct spi_device *spi)
> {
> struct lms283gf05_state *st;
> - struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev);
> struct lcd_device *ld;
> int ret = 0;
>
> - if (pdata != NULL) {
> - ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio,
> - GPIOF_DIR_OUT | (!pdata->reset_inverted ?
> - GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
> - "LMS283GF05 RESET");
> - if (ret)
> - return ret;
> - }
> + st->reset = gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_HIGH);
Isn't this a change of behaviour w.r.t. to the initial state of the pin?
To be honest I suspect it is harmless because we launch into the reset
sequence shortly after anyway. More that that I think I prefer it this
way since it is better aligned with the behaviour of
lms283gf05_power_set().
However if it is an intentional change of behaviour then it would be
good to spell that out in the description for the benefit of future
archaeologists.
Daniel.
> + if (st->reset)
> + gpiod_set_consumer_name(st->reset, "LMS283GF05 RESET");
>
> st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state),
> GFP_KERNEL);
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
