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authorSimon Glass <sjg@chromium.org>2014-12-10 08:55:54 -0700
committerSimon Glass <sjg@chromium.org>2014-12-11 13:18:43 -0700
commit20142019a96a72bf1516be93a86fc10d028fd136 (patch)
treea029c7e3490243ceb6d22fe929fa3a0aadf2d1aa
parent776f96f513869a784c3c0bd5a972f408c10e067a (diff)
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dm: Add a simple EEPROM driver
There seem to be a few EEPROM drivers around - perhaps we should have a single standard one? This simple driver is used for sandbox testing, but could be pressed into more active service. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
-rw-r--r--drivers/misc/Makefile1
-rw-r--r--drivers/misc/i2c_eeprom.c51
-rw-r--r--include/dm/uclass-id.h1
-rw-r--r--include/i2c_eeprom.h19
4 files changed, 72 insertions, 0 deletions
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index ff02184..6fa836f 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_CROS_EC_SANDBOX) += cros_ec_sandbox.o
obj-$(CONFIG_CROS_EC_SPI) += cros_ec_spi.o
obj-$(CONFIG_FSL_IIM) += fsl_iim.o
obj-$(CONFIG_GPIO_LED) += gpio_led.o
+obj-$(CONFIG_I2C_EEPROM) += i2c_eeprom.o
obj-$(CONFIG_FSL_MC9SDZ60) += mc9sdz60.o
obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o
obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o
diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c
new file mode 100644
index 0000000..d0548ec
--- /dev/null
+++ b/drivers/misc/i2c_eeprom.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+#include <i2c_eeprom.h>
+
+static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
+ int size)
+{
+ return -ENODEV;
+}
+
+static int i2c_eeprom_write(struct udevice *dev, int offset,
+ const uint8_t *buf, int size)
+{
+ return -ENODEV;
+}
+
+struct i2c_eeprom_ops i2c_eeprom_std_ops = {
+ .read = i2c_eeprom_read,
+ .write = i2c_eeprom_write,
+};
+
+int i2c_eeprom_std_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+static const struct udevice_id i2c_eeprom_std_ids[] = {
+ { .compatible = "i2c-eeprom" },
+ { }
+};
+
+U_BOOT_DRIVER(i2c_eeprom_std) = {
+ .name = "i2c_eeprom",
+ .id = UCLASS_I2C_EEPROM,
+ .of_match = i2c_eeprom_std_ids,
+ .probe = i2c_eeprom_std_probe,
+ .priv_auto_alloc_size = sizeof(struct i2c_eeprom),
+ .ops = &i2c_eeprom_std_ops,
+};
+
+UCLASS_DRIVER(i2c_eeprom) = {
+ .id = UCLASS_I2C_EEPROM,
+ .name = "i2c_eeprom",
+};
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 16e4224..f17c3c2 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -32,6 +32,7 @@ enum uclass_id {
UCLASS_THERMAL, /* Thermal sensor */
UCLASS_I2C, /* I2C bus */
UCLASS_I2C_GENERIC, /* Generic I2C device */
+ UCLASS_I2C_EEPROM, /* I2C EEPROM device */
UCLASS_COUNT,
UCLASS_INVALID = -1,
diff --git a/include/i2c_eeprom.h b/include/i2c_eeprom.h
new file mode 100644
index 0000000..ea6c962
--- /dev/null
+++ b/include/i2c_eeprom.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __I2C_EEPROM
+#define __I2C_EEPROM
+
+struct i2c_eeprom_ops {
+ int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
+ int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
+ int size);
+};
+
+struct i2c_eeprom {
+};
+
+#endif