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

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.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 7dfd7fd..616e63e 100644 (file)
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -191,6 +191,8 @@ AT24_CHIP_DATA(at24_data_24c16, 16384 / 8, 0);
 AT24_CHIP_DATA(at24_data_24cs16, 16,
        AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24c32, 32768 / 8, AT24_FLAG_ADDR16);
+/* M24C32-D Additional Write lockable page (M24C32-D order codes) */
+AT24_CHIP_DATA(at24_data_24c32d_wlp, 32, AT24_FLAG_ADDR16);
 AT24_CHIP_DATA(at24_data_24cs32, 16,
        AT24_FLAG_ADDR16 | AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24c64, 65536 / 8, AT24_FLAG_ADDR16);
@@ -222,6 +224,7 @@ static const struct i2c_device_id at24_ids[] = {
        { "24c16",      (kernel_ulong_t)&at24_data_24c16 },
        { "24cs16",     (kernel_ulong_t)&at24_data_24cs16 },
        { "24c32",      (kernel_ulong_t)&at24_data_24c32 },
+       { "24c32d-wl",  (kernel_ulong_t)&at24_data_24c32d_wlp },
        { "24cs32",     (kernel_ulong_t)&at24_data_24cs32 },
        { "24c64",      (kernel_ulong_t)&at24_data_24c64 },
        { "24cs64",     (kernel_ulong_t)&at24_data_24cs64 },
@@ -252,6 +255,7 @@ static const struct of_device_id at24_of_match[] = {
        { .compatible = "atmel,24c16",          .data = &at24_data_24c16 },
        { .compatible = "atmel,24cs16",         .data = &at24_data_24cs16 },
        { .compatible = "atmel,24c32",          .data = &at24_data_24c32 },
+       { .compatible = "atmel,24c32d-wl",      .data = &at24_data_24c32d_wlp },
        { .compatible = "atmel,24cs32",         .data = &at24_data_24cs32 },
        { .compatible = "atmel,24c64",          .data = &at24_data_24c64 },
        { .compatible = "atmel,24cs64",         .data = &at24_data_24cs64 },