diff mbox series

eeprom: at24: add ST M24C32-D Additional Write lockable page support

Message ID 20231016000445.478557-1-marex@denx.de
State Accepted
Commit 3c11643b1915ff0e57443ffd78374477e4579e9a
Delegated to: Stefano Babic
Headers show
Series eeprom: at24: add ST M24C32-D Additional Write lockable page support | expand

Commit Message

Marek Vasut Oct. 16, 2023, 12:04 a.m. UTC 
The ST M24C32-D behaves as a regular M24C32, except for the -D variant
which uses up another I2C address for Additional Write lockable page.
This page is 32 Bytes long and can contain additional data. Add entry
for it, so users can describe that page in DT. Note that users still
have to describe the main M24C32 area separately as that is on separate
I2C address from this page.

From Linux kernel commit:
4791146e9055 ("eeprom: at24: add ST M24C32-D Additional Write lockable page support")

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: "NXP i.MX U-Boot Team" <uboot-imx@nxp.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: u-boot@dh-electronics.com
---
 drivers/misc/i2c_eeprom.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c
index bdd7e018cc6..e1d0b8f918a 100644
--- a/drivers/misc/i2c_eeprom.c
+++ b/drivers/misc/i2c_eeprom.c
@@ -227,6 +227,13 @@  static const struct i2c_eeprom_drv_data atmel24c32_data = {
 	.offset_len = 2,
 };
 
+static const struct i2c_eeprom_drv_data atmel24c32d_wlp_data = {
+	.size = 32,
+	.pagesize = 32,
+	.addr_offset_mask = 0,
+	.offset_len = 2,
+};
+
 static const struct i2c_eeprom_drv_data atmel24c64_data = {
 	.size = 8192,
 	.pagesize = 32,
@@ -266,6 +273,7 @@  static const struct udevice_id i2c_eeprom_std_ids[] = {
 	{ .compatible = "atmel,24c16a", (ulong)&atmel24c16a_data },
 	{ .compatible = "atmel,24mac402", (ulong)&atmel24mac402_data },
 	{ .compatible = "atmel,24c32", (ulong)&atmel24c32_data },
+	{ .compatible = "atmel,24c32d-wl", (ulong)&atmel24c32d_wlp_data },
 	{ .compatible = "atmel,24c64", (ulong)&atmel24c64_data },
 	{ .compatible = "atmel,24c128", (ulong)&atmel24c128_data },
 	{ .compatible = "atmel,24c256", (ulong)&atmel24c256_data },