Hello Simon,
Am 13.10.2014 07:39, schrieb Simon Glass:
The uclass implements the same operations as the current I2C framework but
makes some changes to make it fit driver model better:
- Remove the chip address from API calls
- Remove the address length from API calls
- Remove concept of 'current' I2C bus
- Drop all existing init functions
Signed-off-by: Simon Glass <s...@chromium.org>
---
drivers/i2c/Makefile | 1 +
drivers/i2c/i2c-uclass.c | 177 +++++++++++++++++++++++++++++++
include/config_fallbacks.h | 6 ++
include/dm/uclass-id.h | 1 +
include/i2c.h | 252 +++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 437 insertions(+)
create mode 100644 drivers/i2c/i2c-uclass.c
only nitpick ...
[...]
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
new file mode 100644
index 0000000..6bdce8c
--- /dev/null
+++ b/drivers/i2c/i2c-uclass.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <i2c.h>
+#include <dm/device-internal.h>
+#include <dm/root.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int i2c_read(struct udevice *dev, uint addr, uint8_t *buffer, int len)
+{
+ struct dm_i2c_chip *chip = dev_get_parentdata(dev);
+ struct udevice *bus = dev_get_parent(dev);
+ struct dm_i2c_ops *ops = i2c_get_ops(bus);
+
+ if (!ops->read)
+ return -ENOSYS;
+
+ return ops->read(bus, chip->chip_addr, addr, chip->addr_len, buffer,
+ len);
+}
+
+int i2c_write(struct udevice *dev, uint addr, const uint8_t *buffer, int len)
+{
+ struct dm_i2c_chip *chip = dev_get_parentdata(dev);
+ struct udevice *bus = dev_get_parent(dev);
+ struct dm_i2c_ops *ops = i2c_get_ops(bus);
+
+ if (!ops->write)
+ return -ENOSYS;
+
+ return ops->write(bus, chip->chip_addr, addr, chip->addr_len, buffer,
+ len);
+}
+
+int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp)
+{
+ struct udevice *dev;
+
+ for (device_find_first_child(bus, &dev); dev;
+ device_find_next_child(&dev)) {
+ struct dm_i2c_chip store;
+ struct dm_i2c_chip *chip = dev_get_parentdata(dev);
+ int ret;
+
+ if (!chip) {
+ chip = &store;
+ i2c_chip_ofdata_to_platdata(gd->fdt_blob,
+ dev->of_offset, chip);
+ }
+ if (chip->chip_addr == chip_addr) {
+ ret = device_probe(dev);
+ if (ret)
+ return ret;
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int i2c_probe(struct udevice *bus, uint chip)
+{
+ struct dm_i2c_ops *ops = i2c_get_ops(bus);
+ struct udevice *dev;
+ int ret;
+
+ if (!ops->probe)
+ return -ENODEV;
+
+ /* First probe that chip */
+ ret = ops->probe(bus, chip);
+ if (ret)
+ return ret;
+
+ /* The cihp was found, see if we have a driver, and probe it */
s/cihp/chip
[...]
bye,
Heiko
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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