[U-Boot] [PATCH v4 4/4] dm: cros_ec: Convert cros_ec_i2c over to driver model
Simon Glass
sjg at chromium.org
Tue Jan 27 04:29:40 CET 2015
Move this driver to use driver model and update the snow configuration to
match.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v4:
- Add patches to support offset length in device tree
- Rebase on top of exynos I2C series
drivers/misc/cros_ec_i2c.c | 82 ++++++++++++++++------------------------------
include/configs/snow.h | 1 +
2 files changed, 30 insertions(+), 53 deletions(-)
diff --git a/drivers/misc/cros_ec_i2c.c b/drivers/misc/cros_ec_i2c.c
index 513cdb1..f9bc975 100644
--- a/drivers/misc/cros_ec_i2c.c
+++ b/drivers/misc/cros_ec_i2c.c
@@ -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);
-
- return 0;
-}
+static struct dm_cros_ec_ops cros_ec_ops = {
+ .command = cros_ec_i2c_command,
+};
+
+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,
+};
diff --git a/include/configs/snow.h b/include/configs/snow.h
index 7eaa586..ce6676e 100644
--- a/include/configs/snow.h
+++ b/include/configs/snow.h
@@ -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
--
2.2.0.rc0.207.ga3a616c
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