diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_common.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_common.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c index 0e4434e3c290..9619bdb9e49a 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.c +++ b/drivers/net/ethernet/intel/ice/ice_common.c @@ -4798,6 +4798,59 @@ ice_sched_query_elem(struct ice_hw *hw, u32 node_teid, } /** + * ice_aq_read_i2c + * @hw: pointer to the hw struct + * @topo_addr: topology address for a device to communicate with + * @bus_addr: 7-bit I2C bus address + * @addr: I2C memory address (I2C offset) with up to 16 bits + * @params: I2C parameters: bit [7] - Repeated start, + * bits [6:5] data offset size, + * bit [4] - I2C address type, + * bits [3:0] - data size to read (0-16 bytes) + * @data: pointer to data (0 to 16 bytes) to be read from the I2C device + * @cd: pointer to command details structure or NULL + * + * Read I2C (0x06E2) + */ +int +ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr, + u16 bus_addr, __le16 addr, u8 params, u8 *data, + struct ice_sq_cd *cd) +{ + struct ice_aq_desc desc = { 0 }; + struct ice_aqc_i2c *cmd; + u8 data_size; + int status; + + ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_read_i2c); + cmd = &desc.params.read_i2c; + + if (!data) + return -EINVAL; + + data_size = FIELD_GET(ICE_AQC_I2C_DATA_SIZE_M, params); + + cmd->i2c_bus_addr = cpu_to_le16(bus_addr); + cmd->topo_addr = topo_addr; + cmd->i2c_params = params; + cmd->i2c_addr = addr; + + status = ice_aq_send_cmd(hw, &desc, NULL, 0, cd); + if (!status) { + struct ice_aqc_read_i2c_resp *resp; + u8 i; + + resp = &desc.params.read_i2c_resp; + for (i = 0; i < data_size; i++) { + *data = resp->i2c_data[i]; + data++; + } + } + + return status; +} + +/** * ice_aq_set_driver_param - Set driver parameter to share via firmware * @hw: pointer to the HW struct * @idx: parameter index to set |