On 16/06/15 23:29, Stephen Boyd wrote:
On 05/21/2015 09:43 AM, Srinivas Kandagatla wrote:
@@ -379,6 +380,351 @@ int nvmem_unregister(struct nvmem_device *nvmem)
[...]
+
+ return nvmem;
+}
+
+static int __nvmem_device_put(struct nvmem_device *nvmem)
Why does this return int? It's not used anywhere.
I can remove it.
+{
+ module_put(nvmem->owner);
+ mutex_lock(&nvmem_mutex);
+ nvmem->users--;
+ mutex_unlock(&nvmem_mutex);
+
+ return 0;
+}
+
+static struct nvmem_cell *nvmem_cell_get_from_list(const char *cell_id)
+{
+ struct nvmem_cell *cell = NULL;
+ struct nvmem_device *nvmem;
+
+ nvmem = __nvmem_device_get(NULL, &cell, cell_id);
+ if (IS_ERR(nvmem))
+ return (struct nvmem_cell *)nvmem;
ERR_CAST?
Will fix it.
+
+
+ return cell;
+
+}
+
+static struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+ const char *name)
+{
+ struct device_node *cell_np, *nvmem_np;
+ struct nvmem_cell *cell;
+ struct nvmem_device *nvmem;
+ const __be32 *addr;
+ int rval, len, index;
+
+ index = of_property_match_string(np, "nvmem-cell-names", name);
+
+ cell_np = of_parse_phandle(np, "nvmem-cell", index);
+ if (!cell_np)
+ return ERR_PTR(-EINVAL);
+
+ nvmem_np = of_get_next_parent(cell_np);
+ if (!nvmem_np)
+ return ERR_PTR(-EINVAL);
+
+ nvmem = __nvmem_device_get(nvmem_np, NULL, NULL);
+ if (IS_ERR(nvmem))
+ return (struct nvmem_cell *)nvmem;
ERR_CAST?
Will fix it.
+
+ addr = of_get_property(cell_np, "reg", &len);
+ if (!addr || (len < 2 * sizeof(int))) {
+ dev_err(&nvmem->dev, "of_i2c: invalid reg on %s\n",
huh? of_i2c?
:-)
Will fix it.
+
+ /* if it's not end on byte boundary */
+ if ((nbits + bit_offset) % BITS_PER_BYTE) {
+ /* setup the last byte with msb bits from nvmem */
+ rc = regmap_raw_read(nvmem->regmap,
+ cell->offset + cell->bytes - 1, &v, 1);
+ *p |= GENMASK(7, (nbits + bit_offset) % BITS_PER_BYTE) & v;
+
+ }
+
+ return buf;
+}
+
+/**
+ * nvmem_cell_write(): Write to a given nvmem cell
This isn't kernel doc notation. It should be like
nvmem_cell_write - Write to a given nvmem cell
Will fix as suggested by Sascha as
foobar() - short function description of foobar
Looks correct according to Documentation/kernel-doc-nano-HOWTO.txt
+ *
+ * @cell: nvmem cell to be written.
+ * @buf: Buffer to be written.
+ * @len: length of buffer to be written to nvmem cell.
+ *
+ * The return value will be an length of bytes written or non zero on failure.
+ */
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len)
[..]
+
static int nvmem_init(void)
{
return class_register(&nvmem_class);
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
new file mode 100644
index 0000000..c3fa8c7
--- /dev/null
+++ b/include/linux/nvmem-consumer.h
@@ -0,0 +1,49 @@
+/*
+ * nvmem framework consumer.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_NVMEM_CONSUMER_H
+#define _LINUX_NVMEM_CONSUMER_H
+
+/* consumer cookie */
+struct nvmem_cell;
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+/* Cell based interface */
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
We should probably forward declare struct device in this file too.
Yep I will do it.
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