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Mon, 22 Jul 2024 06:28:20 +0000 From: haibo.chen@nxp.com To: linus.walleij@linaro.org, brgl@bgdev.pl Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, haibo.chen@nxp.com, imx@lists.linux.dev, wahrenst@gmx.net Subject: [PATCH] gpio: vf610: add get_direction() support Date: Mon, 22 Jul 2024 14:28:09 +0800 Message-Id: <20240722062809.915867-1-haibo.chen@nxp.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: SG2PR01CA0170.apcprd01.prod.exchangelabs.com (2603:1096:4:28::26) To DU0PR04MB9496.eurprd04.prod.outlook.com (2603:10a6:10:32d::19) Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR04MB9496:EE_|DB9PR04MB8362:EE_ X-MS-Office365-Filtering-Correlation-Id: 554a874e-997d-450d-60ae-08dcaa177ace X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|376014|366016|1800799024|38350700014; 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So here add the GPIO get_direction() support only for the IP which has Port Data Direction Register (PDDR). Signed-off-by: Haibo Chen --- drivers/gpio/gpio-vf610.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c index 07e5e6323e86..08ca8377b19c 100644 --- a/drivers/gpio/gpio-vf610.c +++ b/drivers/gpio/gpio-vf610.c @@ -151,6 +151,19 @@ static int vf610_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, return pinctrl_gpio_direction_output(chip, gpio); } +static int vf610_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio) +{ + struct vf610_gpio_port *port = gpiochip_get_data(gc); + unsigned long mask = BIT(gpio); + + mask &= vf610_gpio_readl(port->gpio_base + GPIO_PDDR); + + if (mask) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + static void vf610_gpio_irq_handler(struct irq_desc *desc) { struct vf610_gpio_port *port = @@ -362,6 +375,12 @@ static int vf610_gpio_probe(struct platform_device *pdev) gc->get = vf610_gpio_get; gc->direction_output = vf610_gpio_direction_output; gc->set = vf610_gpio_set; + /* + * only IP has Port Data Direction Register(PDDR) can + * support get direction + */ + if (port->sdata->have_paddr) + gc->get_direction = vf610_gpio_get_direction; /* Mask all GPIO interrupts */ for (i = 0; i < gc->ngpio; i++)