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[2003:ec:2bc6:e300:40b8:ff52:e7c5:d1b8]) by smtp.gmail.com with ESMTPSA id 16-v6sm12878387wmi.36.2018.06.28.13.02.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 28 Jun 2018 13:02:08 -0700 (PDT) From: Mathias Kresin To: linus.walleij@linaro.org, john@phrozen.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: martin.blumenstingl@googlemail.com Subject: [PATCH] gpio: stp-xway: Implement get callback Date: Thu, 28 Jun 2018 21:57:40 +0200 Message-Id: <1530215860-25549-1-git-send-email-dev@kresin.me> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add an implementation to get the current GPIO state. The callback is used by the leds-gpio driver for example, in case the current LED/GPIO state should be kept during driver load. Signed-off-by: Mathias Kresin --- drivers/gpio/gpio-stp-xway.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c index c07385b..63c708c 100644 --- a/drivers/gpio/gpio-stp-xway.c +++ b/drivers/gpio/gpio-stp-xway.c @@ -91,6 +91,20 @@ struct xway_stp { }; /** + * xway_stp_get() - gpio_chip->get - get gpios. + * @gc: Pointer to gpio_chip device structure. + * @gpio: GPIO signal number. + * + * Gets the shadow value. + */ +static int xway_stp_get(struct gpio_chip *gc, unsigned int gpio) +{ + struct xway_stp *chip = gpiochip_get_data(gc); + + return (xway_stp_r32(chip->virt, XWAY_STP_CPU0) & BIT(gpio)); +} + +/** * xway_stp_set() - gpio_chip->set - set gpios. * @gc: Pointer to gpio_chip device structure. * @gpio: GPIO signal number. @@ -215,6 +229,7 @@ static int xway_stp_probe(struct platform_device *pdev) chip->gc.parent = &pdev->dev; chip->gc.label = "stp-xway"; chip->gc.direction_output = xway_stp_dir_out; + chip->gc.get = xway_stp_get; chip->gc.set = xway_stp_set; chip->gc.request = xway_stp_request; chip->gc.base = -1; -- 2.7.4