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drivers: i3c: add SETNEWDA ccc helper function

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This is a ccc helper function for setting a new dynamic addr for
a Target.

Signed-off-by: Ryan McClelland <ryanmcclelland@meta.com>
This commit is contained in:
Ryan McClelland 2023-03-16 15:26:45 -07:00 committed by Christopher Friedt
parent 71c5ccb1ef
commit 1f757bc67f
2 changed files with 48 additions and 0 deletions
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32
drivers/i3c/i3c_ccc.c
View file

@ -146,6 +146,38 @@ int i3c_ccc_do_setdasa(const struct i3c_device_desc *target)
return i3c_do_ccc(target->bus, &ccc_payload);
}
int i3c_ccc_do_setnewda(const struct i3c_device_desc *target, struct i3c_ccc_address new_da)
{
struct i3c_ccc_payload ccc_payload;
struct i3c_ccc_target_payload ccc_tgt_payload;
uint8_t new_dyn_addr;
__ASSERT_NO_MSG(target != NULL);
__ASSERT_NO_MSG(target->bus != NULL);
if (target->dynamic_addr == 0U) {
return -EINVAL;
}
/*
* Note that the 7-bit address needs to start at bit 1
* (aka left-justified). So shift left by 1;
*/
new_dyn_addr = new_da.addr << 1;
ccc_tgt_payload.addr = target->dynamic_addr;
ccc_tgt_payload.rnw = 0;
ccc_tgt_payload.data = &new_dyn_addr;
ccc_tgt_payload.data_len = 1;
memset(&ccc_payload, 0, sizeof(ccc_payload));
ccc_payload.ccc.id = I3C_CCC_SETNEWDA;
ccc_payload.targets.payloads = &ccc_tgt_payload;
ccc_payload.targets.num_targets = 1;
return i3c_do_ccc(target->bus, &ccc_payload);
}
int i3c_ccc_do_events_all_set(const struct device *controller,
bool enable, struct i3c_ccc_events *events)
{

16
include/zephyr/drivers/i3c/ccc.h
View file

@ -869,6 +869,22 @@ int i3c_ccc_do_rstdaa_all(const struct device *controller);
*/
int i3c_ccc_do_setdasa(const struct i3c_device_desc *target);
/**
* @brief Set New Dynamic Address for a target
*
* Helper function to do SETNEWDA(Set New Dynamic Address) for a particular target.
*
* Note this does not update @p target with the new dynamic address.
*
* @param[in] target Pointer to the target device descriptor where
* the device is configured with a static address.
* @param[in] new_da Pointer to the new_da struct.
*
* @return @see i3c_do_ccc
*/
int i3c_ccc_do_setnewda(const struct i3c_device_desc *target,
struct i3c_ccc_address new_da);
/**
* @brief Broadcast ENEC/DISEC to enable/disable target events.
*