1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-ts4800.c b/drivers/gpio/gpio-ts4800.c
new file mode 100644
index 000000000..0207c2b81
--- /dev/null
+++ b/drivers/gpio/gpio-ts4800.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * GPIO driver for the TS-4800 board
+ *
+ * Copyright (c) 2016 - Savoir-faire Linux
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+
+#define INPUT_REG_OFFSET        0x00
+#define OUTPUT_REG_OFFSET       0x02
+#define DIRECTION_REG_OFFSET    0x04
+
+static int ts4800_gpio_probe(struct platform_device *pdev)
+{
+	struct gpio_generic_chip_config config;
+	struct device *dev = &pdev->dev;
+	struct gpio_generic_chip *chip;
+	void __iomem *base_addr;
+	int retval;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	base_addr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base_addr))
+		return PTR_ERR(base_addr);
+
+	config = (struct gpio_generic_chip_config) {
+		.dev = dev,
+		.sz = 2,
+		.dat = base_addr + INPUT_REG_OFFSET,
+		.set = base_addr + OUTPUT_REG_OFFSET,
+		.dirout = base_addr + DIRECTION_REG_OFFSET,
+	};
+
+	retval = gpio_generic_chip_init(chip, &config);
+	if (retval)
+		return dev_err_probe(dev, retval,
+				     "failed to initialize the generic GPIO chip\n");
+
+	return devm_gpiochip_add_data(dev, &chip->gc, NULL);
+}
+
+static const struct of_device_id ts4800_gpio_of_match[] = {
+	{ .compatible = "technologic,ts4800-gpio", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ts4800_gpio_of_match);
+
+static struct platform_driver ts4800_gpio_driver = {
+	.driver = {
+		   .name = "ts4800-gpio",
+		   .of_match_table = ts4800_gpio_of_match,
+		   },
+	.probe = ts4800_gpio_probe,
+};
+
+module_platform_driver_probe(ts4800_gpio_driver, ts4800_gpio_probe);
+
+MODULE_AUTHOR("Julien Grossholtz <julien.grossholtz@savoirfairelinux.com>");
+MODULE_DESCRIPTION("TS4800 FPGA GPIO driver");
+MODULE_LICENSE("GPL v2");