linux-gpio.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Thierry Reding <thierry.reding@gmail.com>
To: Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Jon Hunter <jonathanh@nvidia.com>,
	Vidya Sagar <vidyas@nvidia.com>,
	linux-gpio@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: [PATCH 1/9] gpio: Support GPIO controllers without pin-ranges
Date: Thu, 19 Mar 2020 13:27:29 +0100	[thread overview]
Message-ID: <20200319122737.3063291-2-thierry.reding@gmail.com> (raw)
In-Reply-To: <20200319122737.3063291-1-thierry.reding@gmail.com>

From: Thierry Reding <treding@nvidia.com>

Wake gpiochip_generic_request() call into the pinctrl helpers only if a
GPIO controller had any pin-ranges assigned to it. This allows a driver
to unconditionally use this helper if it supports multiple devices of
which only a subset have pin-ranges assigned to them.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpio/gpiolib.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index f31b1d46599e..12f3c339da78 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2792,7 +2792,10 @@ static inline void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gpiochip)
  */
 int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset)
 {
-	return pinctrl_gpio_request(chip->gpiodev->base + offset);
+	if (!list_empty(&chip->gpiodev->pin_ranges))
+		return pinctrl_gpio_request(chip->gpiodev->base + offset);
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(gpiochip_generic_request);
 
-- 
2.24.1


  reply	other threads:[~2020-03-19 12:27 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19 12:27 [PATCH 0/9] pinctrl: tegra: Support SFIO/GPIO programming Thierry Reding
2020-03-19 12:27 ` Thierry Reding [this message]
2020-03-19 17:05   ` [PATCH 1/9] gpio: Support GPIO controllers without pin-ranges Vidya Sagar
2020-03-27 10:37   ` Linus Walleij
2020-03-27 12:13     ` Thierry Reding
2020-03-19 12:27 ` [PATCH 2/9] gpio: tegra186: Add support for pin ranges Thierry Reding
2020-03-19 17:05   ` Vidya Sagar
2020-03-27 10:39   ` Linus Walleij
2020-03-31 20:53     ` Thierry Reding
2020-03-19 12:27 ` [PATCH 3/9] gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1 Thierry Reding
2020-03-19 17:06   ` Vidya Sagar
2020-03-27 10:39   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 4/9] pinctrl: tegra: Fix whitespace issues for improved readability Thierry Reding
2020-03-19 17:06   ` Vidya Sagar
2020-03-27 10:40   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 5/9] pinctrl: tegra: Fix "Scmitt" -> "Schmitt" typo Thierry Reding
2020-03-19 17:07   ` Vidya Sagar
2020-03-27 10:42   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 6/9] pinctrl: tegra: Pass struct tegra_pmx for pin range check Thierry Reding
2020-03-19 17:07   ` Vidya Sagar
2020-03-27 10:43   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 7/9] pinctrl: tegra: Do not add default pin range on Tegra194 Thierry Reding
2020-03-19 17:08   ` Vidya Sagar
2020-03-27 10:44   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 8/9] pinctrl: tegra: Renumber the GG.0 and GG.1 pins Thierry Reding
2020-03-19 17:08   ` Vidya Sagar
2020-03-27 10:45   ` Linus Walleij
2020-03-19 12:27 ` [PATCH 9/9] pinctrl: tegra: Add SFIO/GPIO programming on Tegra194 Thierry Reding
2020-03-19 17:08   ` Vidya Sagar
2020-03-27 10:46   ` Linus Walleij
2020-03-19 17:04 ` [PATCH 0/9] pinctrl: tegra: Support SFIO/GPIO programming Vidya Sagar
2020-03-20 19:37 ` Linus Walleij
2020-03-23 13:16   ` Thierry Reding

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200319122737.3063291-2-thierry.reding@gmail.com \
    --to=thierry.reding@gmail.com \
    --cc=bgolaszewski@baylibre.com \
    --cc=jonathanh@nvidia.com \
    --cc=linus.walleij@linaro.org \
    --cc=linux-gpio@vger.kernel.org \
    --cc=linux-tegra@vger.kernel.org \
    --cc=vidyas@nvidia.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).