i2c_eeprom: add read and write functions

Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Simon Glass <sjg@chromium.org>

i2c_eeprom: add read and write functions
Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Simon Glass <sjg@chromium.org>
Jonas Karlman · Simon Glass
1 parent 26e2e404b7
Showing 2 changed files with 50 additions and 6 deletions Side-by-side Diff
drivers/misc/i2c_eeprom.c
include/i2c_eeprom.h
@@ -10,21 +10,41 @@
 #include <i2c.h>
 #include <i2c_eeprom.h>
  
-static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
-			   int size)
+int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
 {
+	const struct i2c_eeprom_ops *ops = device_get_ops(dev);
+
+	if (!ops->read)
+		return -ENOSYS;
+
+	return ops->read(dev, offset, buf, size);
+}
+
+int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
+{
+	const struct i2c_eeprom_ops *ops = device_get_ops(dev);
+
+	if (!ops->write)
+		return -ENOSYS;
+
+	return ops->write(dev, offset, buf, size);
+}
+
+static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
+			       int size)
+{
 	return dm_i2c_read(dev, offset, buf, size);
 }
  
-static int i2c_eeprom_write(struct udevice *dev, int offset,
-			    const uint8_t *buf, int size)
+static int i2c_eeprom_std_write(struct udevice *dev, int offset,
+				const uint8_t *buf, int size)
 {
 	return -ENODEV;
 }
  
 struct i2c_eeprom_ops i2c_eeprom_std_ops = {
-	.read	= i2c_eeprom_read,
-	.write	= i2c_eeprom_write,
+	.read	= i2c_eeprom_std_read,
+	.write	= i2c_eeprom_std_write,
 };
  
 static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
@@ -20,5 +20,29 @@
 	unsigned pagewidth;
 };
  
+/*
+ * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
+ *
+ * @dev:	Chip to read from
+ * @offset:	Offset within chip to start reading
+ * @buf:	Place to put data
+ * @size:	Number of bytes to read
+ *
+ * @return 0 on success, -ve on failure
+ */
+int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
+
+/*
+ * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
+ *
+ * @dev:	Chip to write to
+ * @offset:	Offset within chip to start writing
+ * @buf:	Buffer containing data to write
+ * @size:	Number of bytes to write
+ *
+ * @return 0 on success, -ve on failure
+ */
+int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size);
+
 #endif
...	...	@@ -10,21 +10,41 @@
10	10	#include <i2c.h>
11	11	#include <i2c_eeprom.h>
12	12
13		-static int i2c_eeprom_read(struct udevice dev, int offset, uint8_t buf,
14		- int size)
	13	+int i2c_eeprom_read(struct udevice dev, int offset, uint8_t buf, int size)
15	14	{
	15	+ const struct i2c_eeprom_ops *ops = device_get_ops(dev);
	16	+
	17	+ if (!ops->read)
	18	+ return -ENOSYS;
	19	+
	20	+ return ops->read(dev, offset, buf, size);
	21	+}
	22	+
	23	+int i2c_eeprom_write(struct udevice dev, int offset, uint8_t buf, int size)
	24	+{
	25	+ const struct i2c_eeprom_ops *ops = device_get_ops(dev);
	26	+
	27	+ if (!ops->write)
	28	+ return -ENOSYS;
	29	+
	30	+ return ops->write(dev, offset, buf, size);
	31	+}
	32	+
	33	+static int i2c_eeprom_std_read(struct udevice dev, int offset, uint8_t buf,
	34	+ int size)
	35	+{
16	36	return dm_i2c_read(dev, offset, buf, size);
17	37	}
18	38
19		-static int i2c_eeprom_write(struct udevice *dev, int offset,
20		- const uint8_t *buf, int size)
	39	+static int i2c_eeprom_std_write(struct udevice *dev, int offset,
	40	+ const uint8_t *buf, int size)
21	41	{
22	42	return -ENODEV;
23	43	}
24	44
25	45	struct i2c_eeprom_ops i2c_eeprom_std_ops = {
26		- .read = i2c_eeprom_read,
27		- .write = i2c_eeprom_write,
	46	+ .read = i2c_eeprom_std_read,
	47	+ .write = i2c_eeprom_std_write,
28	48	};
29	49
30	50	static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
...	...	@@ -20,5 +20,29 @@
20	20	unsigned pagewidth;
21	21	};
22	22
	23	+/*
	24	+ * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
	25	+ *
	26	+ * @dev: Chip to read from
	27	+ * @offset: Offset within chip to start reading
	28	+ * @buf: Place to put data
	29	+ * @size: Number of bytes to read
	30	+ *
	31	+ * @return 0 on success, -ve on failure
	32	+ */
	33	+int i2c_eeprom_read(struct udevice dev, int offset, uint8_t buf, int size);
	34	+
	35	+/*
	36	+ * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
	37	+ *
	38	+ * @dev: Chip to write to
	39	+ * @offset: Offset within chip to start writing
	40	+ * @buf: Buffer containing data to write
	41	+ * @size: Number of bytes to write
	42	+ *
	43	+ * @return 0 on success, -ve on failure
	44	+ */
	45	+int i2c_eeprom_write(struct udevice dev, int offset, uint8_t buf, int size);
	46	+
23	47	#endif