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drivers: i3c: add rstdaa direct helper

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In I3C v1.0, there was a RSTDAA direct CCC. It is deprecated in I3C v1.1
and later. This adds a CCC helper for it.

Signed-off-by: Ryan McClelland <ryanmcclelland@meta.com>
This commit is contained in:
Ryan McClelland 2025-03-20 22:22:18 -07:00 • committed by Benjamin Cabé
commit c0503597ba
2 changed files with 44 additions and 1 deletions
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20
drivers/i3c/i3c_ccc.c
View file

@ -137,6 +137,26 @@ int i3c_ccc_do_rstact(const struct i3c_device_desc *target,
return i3c_do_ccc(target->bus, &ccc_payload);
}
int i3c_ccc_do_rstdaa(struct i3c_device_desc *target)
{
struct i3c_ccc_payload ccc_payload;
struct i3c_ccc_target_payload ccc_tgt_payload;
__ASSERT_NO_MSG(target != NULL);
__ASSERT_NO_MSG(target->bus != NULL);
ccc_tgt_payload.addr = target->dynamic_addr;
ccc_tgt_payload.rnw = 1;
ccc_tgt_payload.data_len = 0;
memset(&ccc_payload, 0, sizeof(ccc_payload));
ccc_payload.ccc.id = I3C_CCC_RSTDAA_DC;
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_rstdaa_all(const struct device *controller)
{
struct i3c_ccc_payload ccc_payload;

25
include/zephyr/drivers/i3c/ccc.h
View file

@ -179,6 +179,14 @@ extern "C" {
*/
#define I3C_CCC_VENDOR(broadcast, id) ((id) + ((broadcast) ? 0x61U : 0xE0U))
/**
* Reset Dynamic Address (Direct)
*
* @note This should not be used by devices that support I3C v1.0 and this
* shall not be used for devices that support I3C v1.1 or later.
*/
#define I3C_CCC_RSTDAA_DC 0x86U
/** Set Dynamic Address from Static Address (Direct) */
#define I3C_CCC_SETDASA 0x87U
@ -1502,6 +1510,21 @@ static inline int i3c_ccc_do_rstact_fmt3(const struct i3c_device_desc *target,
return i3c_ccc_do_rstact(target, action, true, data);
}
/**
* @brief Reset dynamic addresses for a targets.
*
* Helper function to reset a dynamic addresses of a targets.
*
* @note This should not be used by devices that support I3C v1.0 and this
* shall not be used for devices that support I3C v1.1 or later.
*
* @param[in] target Pointer to the target device descriptor where
* the device is configured with a dynamic address.
*
* @return @see i3c_do_ccc
*/
int i3c_ccc_do_rstdaa(struct i3c_device_desc *target);
/**
* @brief Broadcast RSTDAA to reset dynamic addresses for all targets.
*
@ -1538,7 +1561,7 @@ int i3c_ccc_do_setdasa(const struct i3c_device_desc *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.
* the device is configured with a dynamic address.
* @param[in] new_da Struct of the Dynamic address
*
* @return @see i3c_do_ccc