1 files changed, 70 insertions, 0 deletions
diff --git a/arch/mips/lantiq/xway/vmmc.c b/arch/mips/lantiq/xway/vmmc.c
new file mode 100644
index 000000000..2796e87df
--- /dev/null
+++ b/arch/mips/lantiq/xway/vmmc.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ *  Copyright (C) 2012 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+
+#include <lantiq_soc.h>
+
+static unsigned int *cp1_base;
+
+unsigned int *ltq_get_cp1_base(void)
+{
+	if (!cp1_base)
+		panic("no cp1 base was set\n");
+
+	return cp1_base;
+}
+EXPORT_SYMBOL(ltq_get_cp1_base);
+
+static int vmmc_probe(struct platform_device *pdev)
+{
+#define CP1_SIZE       (1 << 20)
+	struct gpio_desc *gpio;
+	int gpio_count;
+	dma_addr_t dma;
+	int error;
+
+	cp1_base =
+		(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
+						    &dma, GFP_KERNEL));
+
+	gpio_count = gpiod_count(&pdev->dev, NULL);
+	while (gpio_count > 0) {
+		gpio = devm_gpiod_get_index(&pdev->dev,
+					    NULL, --gpio_count, GPIOD_OUT_HIGH);
+		error = PTR_ERR_OR_ZERO(gpio);
+		if (error) {
+			dev_err(&pdev->dev,
+				"failed to request GPIO idx %d: %d\n",
+				gpio_count, error);
+			continue;
+		}
+
+		gpiod_set_consumer_name(gpio, "vmmc-relay");
+	}
+
+	dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
+
+	return 0;
+}
+
+static const struct of_device_id vmmc_match[] = {
+	{ .compatible = "lantiq,vmmc-xway" },
+	{},
+};
+
+static struct platform_driver vmmc_driver = {
+	.probe = vmmc_probe,
+	.driver = {
+		.name = "lantiq,vmmc",
+		.of_match_table = vmmc_match,
+	},
+};
+builtin_platform_driver(vmmc_driver);