sandbox: i2c: Support i2c emulation with of-platdata

At present the i2c emulators require access to the devicetree, which is
not possible (by design) with of-platdata.

Add a way for drivers to record the of-platdata index of their emulator,
so that we can still find the emulator.

This allows i2c emulation to work with of-platdata.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-03-15 17:25:30 +13:00
parent abaed70990
commit 728d04cc72
3 changed files with 43 additions and 2 deletions

View File

@@ -93,6 +93,8 @@ struct udevice;
* datasheet explains it's usage of this addressing
* mode.
* @emul: Emulator for this chip address (only used for emulation)
* @emul_idx: Emulator index, used for of-platdata and set by each i2c chip's
* bind() method. This allows i2c_emul_find() to work with of-platdata.
*/
struct dm_i2c_chip {
uint chip_addr;
@@ -102,6 +104,7 @@ struct dm_i2c_chip {
#ifdef CONFIG_SANDBOX
struct udevice *emul;
bool test_mode;
int emul_idx;
#endif
};
@@ -554,6 +557,18 @@ void i2c_dump_msgs(struct i2c_msg *msg, int nmsgs);
*/
int i2c_emul_find(struct udevice *dev, struct udevice **emulp);
/**
* i2c_emul_set_idx() - Set the emulator index for an i2c sandbox device
*
* With of-platdata we cannot find the emulator using the device tree, so rely
* on the bind() method of each i2c driver calling this function to tell us
* the of-platdata idx of the emulator
*
* @dev: i2c device to set the emulator for
* @emul_idx: of-platdata index for that emulator
*/
void i2c_emul_set_idx(struct udevice *dev, int emul_idx);
/**
* i2c_emul_get_device() - Find the device being emulated
*