Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpio / gpio-clps711x.c

diff --git a/kernel/drivers/gpio/gpio-clps711x.c b/kernel/drivers/gpio/gpio-clps711x.c
new file mode 100644 (file)
index 0000000..b6908f1
--- /dev/null
+++ b/kernel/drivers/gpio/gpio-clps711x.c
@@ -0,0 +1,100 @@
+/*
+ *  CLPS711X GPIO driver
+ *
+ *  Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/platform_device.h>
+
+static int clps711x_gpio_probe(struct platform_device *pdev)
+{
+       struct device_node *np = pdev->dev.of_node;
+       void __iomem *dat, *dir;
+       struct bgpio_chip *bgc;
+       struct resource *res;
+       int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
+
+       if ((id < 0) || (id > 4))
+               return -ENODEV;
+
+       bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
+       if (!bgc)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       dat = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(dat))
+               return PTR_ERR(dat);
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+       dir = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(dir))
+               return PTR_ERR(dir);
+
+       switch (id) {
+       case 3:
+               /* PORTD is inverted logic for direction register */
+               err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
+                                NULL, dir, 0);
+               break;
+       default:
+               err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
+                                dir, NULL, 0);
+               break;
+       }
+
+       if (err)
+               return err;
+
+       switch (id) {
+       case 4:
+               /* PORTE is 3 lines only */
+               bgc->gc.ngpio = 3;
+               break;
+       default:
+               break;
+       }
+
+       bgc->gc.base = id * 8;
+       bgc->gc.owner = THIS_MODULE;
+       platform_set_drvdata(pdev, bgc);
+
+       return gpiochip_add(&bgc->gc);
+}
+
+static int clps711x_gpio_remove(struct platform_device *pdev)
+{
+       struct bgpio_chip *bgc = platform_get_drvdata(pdev);
+
+       return bgpio_remove(bgc);
+}
+
+static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
+       { .compatible = "cirrus,clps711x-gpio" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
+
+static struct platform_driver clps711x_gpio_driver = {
+       .driver = {
+               .name           = "clps711x-gpio",
+               .of_match_table = of_match_ptr(clps711x_gpio_ids),
+       },
+       .probe  = clps711x_gpio_probe,
+       .remove = clps711x_gpio_remove,
+};
+module_platform_driver(clps711x_gpio_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
+MODULE_DESCRIPTION("CLPS711X GPIO driver");
+MODULE_ALIAS("platform:clps711x-gpio");