linux-kernel - [LINUX PATCH V3 6/9] gpio: gpio-xilinx: Add remove function

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Date:   Thu, 12 Nov 2020 22:42:25 +0530
From:   Srinivas Neeli <srinivas.neeli@...inx.com>
To:     <linus.walleij@...aro.org>, <bgolaszewski@...libre.com>,
        <michal.simek@...inx.com>, <shubhrajyoti.datta@...inx.com>,
        <sgoud@...inx.com>, <hancock@...systems.ca>
CC:     <linux-gpio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <git@...inx.com>,
        Srinivas Neeli <srinivas.neeli@...inx.com>
Subject: [LINUX PATCH V3 6/9] gpio: gpio-xilinx: Add remove function

Added remove function support.

Signed-off-by: Srinivas Neeli <srinivas.neeli@...inx.com>
---
Changes in V3:
-Created new patch for remove function.
---
 drivers/gpio/gpio-xilinx.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 855550a06ded..9abef56eca32 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -453,6 +453,24 @@ static void xgpio_irqhandler(struct irq_desc *desc)
 }
 
 /**
+ * xgpio_remove - Remove method for the GPIO device.
+ * @pdev: pointer to the platform device
+ *
+ * This function remove gpiochips and frees all the allocated resources.
+ *
+ * Return: 0 always
+ */
+static int xgpio_remove(struct platform_device *pdev)
+{
+	struct xgpio_instance *gpio = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(gpio->clk);
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+/**
  * xgpio_of_probe - Probe method for the GPIO device.
  * @pdev: pointer to the platform device
  *
@@ -601,6 +619,7 @@ MODULE_DEVICE_TABLE(of, xgpio_of_match);
 
 static struct platform_driver xgpio_plat_driver = {
 	.probe		= xgpio_probe,
+	.remove		= xgpio_remove,
 	.driver		= {
 			.name = "gpio-xilinx",
 			.of_match_table	= xgpio_of_match,
-- 
2.7.4