v4.19.13 snapshot.
diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
new file mode 100644
index 0000000..4b15fed
--- /dev/null
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -0,0 +1,167 @@
+/*
+ * arch/sh/drivers/dma/dma-sysfs.c
+ *
+ * sysfs interface for SH DMA API
+ *
+ * Copyright (C) 2004 - 2006 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <asm/dma.h>
+
+static struct bus_type dma_subsys = {
+ .name = "dma",
+ .dev_name = "dma",
+};
+
+static ssize_t dma_show_devices(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ struct dma_info *info = get_dma_info(i);
+ struct dma_channel *channel = get_dma_channel(i);
+
+ if (unlikely(!info) || !channel)
+ continue;
+
+ len += sprintf(buf + len, "%2d: %14s %s\n",
+ channel->chan, info->name,
+ channel->dev_id);
+ }
+
+ return len;
+}
+
+static DEVICE_ATTR(devices, S_IRUGO, dma_show_devices, NULL);
+
+static int __init dma_subsys_init(void)
+{
+ int ret;
+
+ ret = subsys_system_register(&dma_subsys, NULL);
+ if (unlikely(ret))
+ return ret;
+
+ return device_create_file(dma_subsys.dev_root, &dev_attr_devices);
+}
+postcore_initcall(dma_subsys_init);
+
+static ssize_t dma_show_dev_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dma_channel *channel = to_dma_channel(dev);
+ return sprintf(buf, "%s\n", channel->dev_id);
+}
+
+static ssize_t dma_store_dev_id(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dma_channel *channel = to_dma_channel(dev);
+ strcpy(channel->dev_id, buf);
+ return count;
+}
+
+static DEVICE_ATTR(dev_id, S_IRUGO | S_IWUSR, dma_show_dev_id, dma_store_dev_id);
+
+static ssize_t dma_store_config(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dma_channel *channel = to_dma_channel(dev);
+ unsigned long config;
+
+ config = simple_strtoul(buf, NULL, 0);
+ dma_configure_channel(channel->vchan, config);
+
+ return count;
+}
+
+static DEVICE_ATTR(config, S_IWUSR, NULL, dma_store_config);
+
+static ssize_t dma_show_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dma_channel *channel = to_dma_channel(dev);
+ return sprintf(buf, "0x%08x\n", channel->mode);
+}
+
+static ssize_t dma_store_mode(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct dma_channel *channel = to_dma_channel(dev);
+ channel->mode = simple_strtoul(buf, NULL, 0);
+ return count;
+}
+
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, dma_show_mode, dma_store_mode);
+
+#define dma_ro_attr(field, fmt) \
+static ssize_t dma_show_##field(struct device *dev, \
+ struct device_attribute *attr, char *buf)\
+{ \
+ struct dma_channel *channel = to_dma_channel(dev); \
+ return sprintf(buf, fmt, channel->field); \
+} \
+static DEVICE_ATTR(field, S_IRUGO, dma_show_##field, NULL);
+
+dma_ro_attr(count, "0x%08x\n");
+dma_ro_attr(flags, "0x%08lx\n");
+
+int dma_create_sysfs_files(struct dma_channel *chan, struct dma_info *info)
+{
+ struct device *dev = &chan->dev;
+ char name[16];
+ int ret;
+
+ dev->id = chan->vchan;
+ dev->bus = &dma_subsys;
+
+ ret = device_register(dev);
+ if (ret)
+ return ret;
+
+ ret |= device_create_file(dev, &dev_attr_dev_id);
+ ret |= device_create_file(dev, &dev_attr_count);
+ ret |= device_create_file(dev, &dev_attr_mode);
+ ret |= device_create_file(dev, &dev_attr_flags);
+ ret |= device_create_file(dev, &dev_attr_config);
+
+ if (unlikely(ret)) {
+ dev_err(&info->pdev->dev, "Failed creating attrs\n");
+ return ret;
+ }
+
+ snprintf(name, sizeof(name), "dma%d", chan->chan);
+ return sysfs_create_link(&info->pdev->dev.kobj, &dev->kobj, name);
+}
+
+void dma_remove_sysfs_files(struct dma_channel *chan, struct dma_info *info)
+{
+ struct device *dev = &chan->dev;
+ char name[16];
+
+ device_remove_file(dev, &dev_attr_dev_id);
+ device_remove_file(dev, &dev_attr_count);
+ device_remove_file(dev, &dev_attr_mode);
+ device_remove_file(dev, &dev_attr_flags);
+ device_remove_file(dev, &dev_attr_config);
+
+ snprintf(name, sizeof(name), "dma%d", chan->chan);
+ sysfs_remove_link(&info->pdev->dev.kobj, name);
+
+ device_unregister(dev);
+}