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@@ -20,6 +20,7 @@
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#include <linux/log2.h>
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#include <linux/bitops.h>
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#include <linux/jiffies.h>
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+#include <linux/of.h>
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#include <linux/i2c.h>
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#include <linux/i2c/at24.h>
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@@ -457,6 +458,27 @@ static ssize_t at24_macc_write(struct memory_accessor *macc, const char *buf,
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/*-------------------------------------------------------------------------*/
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+#ifdef CONFIG_OF
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+static void at24_get_ofdata(struct i2c_client *client,
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+ struct at24_platform_data *chip)
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+{
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+ const __be32 *val;
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+ struct device_node *node = client->dev.of_node;
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+
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+ if (node) {
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+ if (of_get_property(node, "read-only", NULL))
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+ chip->flags |= AT24_FLAG_READONLY;
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+ val = of_get_property(node, "pagesize", NULL);
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+ if (val)
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+ chip->page_size = be32_to_cpup(val);
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+ }
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+}
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+#else
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+static void at24_get_ofdata(struct i2c_client *client,
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+ struct at24_platform_data *chip)
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+{ }
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+#endif /* CONFIG_OF */
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+
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static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
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{
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struct at24_platform_data chip;
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@@ -485,6 +507,9 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
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*/
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chip.page_size = 1;
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+ /* update chipdata if OF is present */
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+ at24_get_ofdata(client, &chip);
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+
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chip.setup = NULL;
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chip.context = NULL;
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}
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@@ -597,19 +622,15 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
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i2c_set_clientdata(client, at24);
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- dev_info(&client->dev, "%zu byte %s EEPROM %s\n",
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+ dev_info(&client->dev, "%zu byte %s EEPROM, %s, %u bytes/write\n",
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at24->bin.size, client->name,
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- writable ? "(writable)" : "(read-only)");
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+ writable ? "writable" : "read-only", at24->write_max);
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if (use_smbus == I2C_SMBUS_WORD_DATA ||
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use_smbus == I2C_SMBUS_BYTE_DATA) {
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dev_notice(&client->dev, "Falling back to %s reads, "
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"performance will suffer\n", use_smbus ==
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I2C_SMBUS_WORD_DATA ? "word" : "byte");
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}
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- dev_dbg(&client->dev,
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- "page_size %d, num_addresses %d, write_max %d, use_smbus %d\n",
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- chip.page_size, num_addresses,
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- at24->write_max, use_smbus);
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/* export data to kernel code */
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if (chip.setup)
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