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Diffstat (limited to 'arch/mips/lantiq/xway/vmmc.c')
-rw-r--r--arch/mips/lantiq/xway/vmmc.c70
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);