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dm: cros_ec: Convert cros_ec_i2c over to driver model 

Move this driver to use driver model and update the snow configuration to
match.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-01-26 20:29:40 -07:00
parent d744d56136
commit 85df958ce2
2 changed files with 29 additions and 52 deletions
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80
drivers/misc/cros_ec_i2c.c
View File

@ -14,6 +14,7 @@
*/
#include <common.h>
#include <dm.h>
#include <i2c.h>
#include <cros_ec.h>
@ -23,11 +24,11 @@
#define debug_trace(fmt, b...)
#endif
int cros_ec_i2c_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const uint8_t *dout, int dout_len,
uint8_t **dinp, int din_len)
static int cros_ec_i2c_command(struct udevice *udev, uint8_t cmd,
int cmd_version, const uint8_t *dout,
int dout_len, uint8_t **dinp, int din_len)
{
int old_bus = 0;
struct cros_ec_dev *dev = udev->uclass_priv;
/* version8, cmd8, arglen8, out8[dout_len], csum8 */
int out_bytes = dout_len + 4;
/* response8, arglen8, in8[din_len], checksum8 */
@ -37,8 +38,6 @@ int cros_ec_i2c_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
uint8_t *in_ptr;
int len, csum, ret;
old_bus = i2c_get_bus_num();
/*
* Sanity-check I/O sizes given transaction overhead in internal
* buffers.
@ -86,36 +85,24 @@ int cros_ec_i2c_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
*ptr++ = (uint8_t)
cros_ec_calc_checksum(dev->dout, dout_len + 3);
/* Set to the proper i2c bus */
if (i2c_set_bus_num(dev->bus_num)) {
debug("%s: Cannot change to I2C bus %d\n", __func__,
dev->bus_num);
return -1;
}
/* Send output data */
cros_ec_dump_data("out", -1, dev->dout, out_bytes);
ret = i2c_write(dev->addr, 0, 0, dev->dout, out_bytes);
ret = dm_i2c_write(udev, 0, dev->dout, out_bytes);
if (ret) {
debug("%s: Cannot complete I2C write to 0x%x\n",
__func__, dev->addr);
debug("%s: Cannot complete I2C write to %s\n", __func__,
udev->name);
ret = -1;
}
if (!ret) {
ret = i2c_read(dev->addr, 0, 0, in_ptr, in_bytes);
ret = dm_i2c_read(udev, 0, in_ptr, in_bytes);
if (ret) {
debug("%s: Cannot complete I2C read from 0x%x\n",
__func__, dev->addr);
debug("%s: Cannot complete I2C read from %s\n",
__func__, udev->name);
ret = -1;
}
}
/* Return to original bus number */
i2c_set_bus_num(old_bus);
if (ret)
return ret;
if (*in_ptr != EC_RES_SUCCESS) {
debug("%s: Received bad result code %d\n", __func__, *in_ptr);
return -(int)*in_ptr;
@ -142,35 +129,24 @@ int cros_ec_i2c_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
return din_len;
}
int cros_ec_i2c_decode_fdt(struct cros_ec_dev *dev, const void *blob)
static int cros_ec_probe(struct udevice *dev)
{
/* Decode interface-specific FDT params */
dev->max_frequency = fdtdec_get_int(blob, dev->node,
"i2c-max-frequency", 100000);
dev->bus_num = i2c_get_bus_num_fdt(dev->parent_node);
if (dev->bus_num == -1) {
debug("%s: Failed to read bus number\n", __func__);
return -1;
}
dev->addr = fdtdec_get_int(blob, dev->node, "reg", -1);
if (dev->addr == -1) {
debug("%s: Failed to read device address\n", __func__);
return -1;
}
return 0;
return cros_ec_register(dev);
}
/**
* Initialize I2C protocol.
*
* @param dev CROS_EC device
* @param blob Device tree blob
* @return 0 if ok, -1 on error
*/
int cros_ec_i2c_init(struct cros_ec_dev *dev, const void *blob)
{
i2c_init(dev->max_frequency, dev->addr);
static struct dm_cros_ec_ops cros_ec_ops = {
.command = cros_ec_i2c_command,
};
return 0;
}
static const struct udevice_id cros_ec_ids[] = {
{ .compatible = "google,cros-ec" },
{ }
};
U_BOOT_DRIVER(cros_ec_i2c) = {
.name = "cros_ec",
.id = UCLASS_CROS_EC,
.of_match = cros_ec_ids,
.probe = cros_ec_probe,
.ops = &cros_ec_ops,
};

1
include/configs/snow.h
View File

@ -22,6 +22,7 @@
#define CONFIG_CROS_EC_I2C /* Support CROS_EC over I2C */
#define CONFIG_POWER_TPS65090_I2C
#define CONFIG_DM_CROS_EC
#define CONFIG_BOARD_COMMON
#define CONFIG_ARCH_EARLY_INIT_R