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authorSteffen Trumtrar <s.trumtrar@pengutronix.de>2017-03-27 17:17:38 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2017-03-30 08:23:22 +0200
commit0d252e961eb2db3821c60160f0842a9f50623aa6 (patch)
tree85d6dbec1ea4d36fda43f7533fc866d9009b594e /include
parent441e9f5a72b245b671118f3e771eb129834a7a34 (diff)
downloadbarebox-0d252e961eb2db3821c60160f0842a9f50623aa6.tar.gz
barebox-0d252e961eb2db3821c60160f0842a9f50623aa6.tar.xz
drivers: add nvmem framework from kernel
Add the nvmem framework from Linux. Based on the v4.4-rc3 version. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/nvmem-consumer.h94
-rw-r--r--include/linux/nvmem-provider.h49
2 files changed, 143 insertions, 0 deletions
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
new file mode 100644
index 0000000000..606cadb498
--- /dev/null
+++ b/include/linux/nvmem-consumer.h
@@ -0,0 +1,94 @@
+/*
+ * nvmem framework consumer.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * 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
+
+struct device_d;
+struct device_node;
+/* consumer cookie */
+struct nvmem_cell;
+struct nvmem_device;
+
+struct nvmem_cell_info {
+ const char *name;
+ unsigned int offset;
+ unsigned int bytes;
+ unsigned int bit_offset;
+ unsigned int nbits;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+/* Cell based interface */
+struct nvmem_cell *nvmem_cell_get(struct device_d *dev, const char *name);
+void nvmem_cell_put(struct nvmem_cell *cell);
+void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
+
+/* direct nvmem device read/write interface */
+struct nvmem_device *nvmem_device_get(struct device_d *dev, const char *name);
+void nvmem_device_put(struct nvmem_device *nvmem);
+
+#else
+
+static inline struct nvmem_cell *nvmem_cell_get(struct device_d *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline void nvmem_cell_put(struct nvmem_cell *cell)
+{
+}
+
+static inline char *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline int nvmem_cell_write(struct nvmem_cell *cell,
+ const char *buf, size_t len)
+{
+ return -ENOSYS;
+}
+
+static inline struct nvmem_device *nvmem_device_get(struct device_d *dev,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline void nvmem_device_put(struct nvmem_device *nvmem)
+{
+}
+#endif /* CONFIG_NVMEM */
+
+#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OFTREE)
+struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+ const char *name);
+struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+ const char *name);
+#else
+static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif /* CONFIG_NVMEM && CONFIG_OF */
+
+#endif /* ifndef _LINUX_NVMEM_CONSUMER_H */
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
new file mode 100644
index 0000000000..6ef5ea6854
--- /dev/null
+++ b/include/linux/nvmem-provider.h
@@ -0,0 +1,49 @@
+/*
+ * nvmem framework provider.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * 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_PROVIDER_H
+#define _LINUX_NVMEM_PROVIDER_H
+
+#include <common.h>
+#include <linux/types.h>
+
+struct nvmem_device;
+
+struct nvmem_bus {
+ int (*write)(struct device_d *dev, const int reg, const void *val,
+ int val_size);
+ int (*read)(struct device_d *dev, const int reg, void *val,
+ int val_size);
+};
+
+struct nvmem_config {
+ struct device_d *dev;
+ const char *name;
+ bool read_only;
+ int stride;
+ int word_size;
+ int size;
+ const struct nvmem_bus *bus;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
+
+#else
+
+static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+#endif /* CONFIG_NVMEM */
+#endif /* ifndef _LINUX_NVMEM_PROVIDER_H */