Add a driver for the Maxim DS2431 1-Wire EEPROM
Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
---
drivers/eeprom/Kconfig | 6 ++++++
drivers/eeprom/Makefile | 1 +
drivers/eeprom/ds2431.c | 38 ++++++++++++++++++++++++++++++++++++++
3 files changed, 45 insertions(+), 0 deletions(-)
create mode 100644 drivers/eeprom/ds2431.c
diff --git a/drivers/eeprom/Kconfig b/drivers/eeprom/Kconfig
index 8dc597a8d894..98bbd67ba579 100644
--- a/drivers/eeprom/Kconfig
+++ b/drivers/eeprom/Kconfig
@@ -12,6 +12,12 @@ config EEPROM
if EEPROM
+config EEPROM_DS2431
+ bool "Enable Maxim DS2431 EEPROM support"
+ depends on W1
+ help
+ Maxim DS2431 1-Wire EEPROM support
+
endif
endmenu
diff --git a/drivers/eeprom/Makefile b/drivers/eeprom/Makefile
index 147dba5ec4b8..93dae0bf5d6d 100644
--- a/drivers/eeprom/Makefile
+++ b/drivers/eeprom/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_EEPROM) += eeprom-uclass.o
+obj-$(CONFIG_EEPROM_DS2431) += ds2431.o
diff --git a/drivers/eeprom/ds2431.c b/drivers/eeprom/ds2431.c
new file mode 100644
index 000000000000..84c1a126c339
--- /dev/null
+++ b/drivers/eeprom/ds2431.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2015 Free Electrons
+ * Copyright (c) 2015 NextThing Co
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <dm.h>
+#include <eeprom.h>
+#include <w1.h>
+
+#define W1_F2D_READ_EEPROM 0xf0
+
+static int ds2431_read_buf(struct udevice *dev, unsigned offset,
+ u8 *buf, unsigned count)
+{
+ w1_reset_select(dev);
+
+ w1_write_byte(dev, W1_F2D_READ_EEPROM);
+ w1_write_byte(dev, offset & 0xff);
+ w1_write_byte(dev, offset >> 8);
+
+ return w1_read_buf(dev, buf, count);
+}
+
+static const struct eeprom_ops ds2431_ops = {
+ .read_buf = ds2431_read_buf,
+};
+
+U_BOOT_DRIVER(ds2431) = {
+ .name = "ds2431",
+ .id = UCLASS_EEPROM,
+ .ops = &ds2431_ops,
+};
+
+U_BOOT_W1_DEVICE(ds2431, W1_FAMILY_DS2431);
--
git-series 0.8.11
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