1 files changed, 64 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..7a14da8d9
--- /dev/null
+++ b/arch/mips/lantiq/xway/vmmc.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ *  Copyright (C) 2012 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/export.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.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)
+        int gpio_count;
+        dma_addr_t dma;
+
+        cp1_base =
+                (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
+                                                    &dma, GFP_KERNEL));
+
+        gpio_count = of_gpio_count(pdev->dev.of_node);
+        while (gpio_count > 0) {
+                enum of_gpio_flags flags;
+                int gpio = of_get_gpio_flags(pdev->dev.of_node,
+                                             --gpio_count, &flags);
+                if (gpio_request(gpio, "vmmc-relay"))
+                        continue;
+                dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
+                gpio_direction_output(gpio,
+                                      (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
+        }
+
+        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);