Allows specifying the page size when the eeproms are in the device
tree. Same as the Linux kernel device-tree bindings for at24.
Signed-off-by: Trent Piepho <tpiepho@xxxxxxxxxxxxxx>
---
drivers/eeprom/at24.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/eeprom/at24.c b/drivers/eeprom/at24.c
index 76f30e7..d025db8 100644
--- a/drivers/eeprom/at24.c
+++ b/drivers/eeprom/at24.c
@@ -381,6 +381,7 @@ static int at24_probe(struct device_d *dev)
chip = *(struct at24_platform_data *)dev->platform_data;
} else {
unsigned long magic;
+ u32 page_size;
err = dev_get_drvdata(dev, (const void **)&magic);
if (err)
@@ -389,12 +390,17 @@ static int at24_probe(struct device_d *dev)
chip.byte_len = BIT(magic & AT24_BITMASK(AT24_SIZE_BYTELEN));
magic >>= AT24_SIZE_BYTELEN;
chip.flags = magic & AT24_BITMASK(AT24_SIZE_FLAGS);
- /*
- * This is slow, but we can't know all eeproms, so we better
- * play safe. Specifying custom eeprom-types via platform_data
- * is recommended anyhow.
- */
- chip.page_size = 1;
+ if (dev->device_node &&
+ !of_property_read_u32(dev->device_node, "pagesize", &page_size))
+ chip.page_size = page_size;
+ else {
+ /*
+ * This is slow, but we can't know all eeproms, so we better
+ * play safe. Specifying custom eeprom-types via platform_data
+ * is recommended anyhow.
+ */
+ chip.page_size = 1;
+ }
}
if (!is_power_of_2(chip.byte_len))
--
1.8.3.1
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