Initial import

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c
new file mode 100644
index 000000000..b6908f1ff
--- /dev/null
+++ b/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");