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| author | Karol Kolacinski <karol.kolacinski@intel.com> | 2022-06-24 17:22:02 +0200 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2022-07-21 11:22:45 -0700 |
| commit | fcf9b695a554dd8b74863ea59b639515f95b10ee (patch) | |
| tree | 4069240dc37e1ebeaf5e097d357bcb6d19422d74 /drivers/net/ethernet/intel/ice/ice_common.c | |
| parent | 5588d628027092e66195097bdf6835ddf64418b3 (diff) | |
| download | lwn-fcf9b695a554dd8b74863ea59b639515f95b10ee.tar.gz lwn-fcf9b695a554dd8b74863ea59b639515f95b10ee.zip | |
ice: add i2c write command
Add the possibility to write to connected i2c devices using the AQ
command. FW may reject the write if the device is not on allowlist.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_common.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_common.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c index 9619bdb9e49a..27d0cbbd29da 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.c +++ b/drivers/net/ethernet/intel/ice/ice_common.c @@ -4823,7 +4823,7 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr, int status; ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_read_i2c); - cmd = &desc.params.read_i2c; + cmd = &desc.params.read_write_i2c; if (!data) return -EINVAL; @@ -4851,6 +4851,51 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr, } /** + * ice_aq_write_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 [4] - I2C address type, bits [3:0] - data size to write (0-7 bytes) + * @data: pointer to data (0 to 4 bytes) to be written to the I2C device + * @cd: pointer to command details structure or NULL + * + * Write I2C (0x06E3) + * + * * Return: + * * 0 - Successful write to the i2c device + * * -EINVAL - Data size greater than 4 bytes + * * -EIO - FW error + */ +int +ice_aq_write_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; + + ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_write_i2c); + cmd = &desc.params.read_write_i2c; + + data_size = FIELD_GET(ICE_AQC_I2C_DATA_SIZE_M, params); + + /* data_size limited to 4 */ + if (data_size > 4) + return -EINVAL; + + cmd->i2c_bus_addr = cpu_to_le16(bus_addr); + cmd->topo_addr = topo_addr; + cmd->i2c_params = params; + cmd->i2c_addr = addr; + + memcpy(cmd->i2c_data, data, data_size); + + return ice_aq_send_cmd(hw, &desc, NULL, 0, cd); +} + +/** * ice_aq_set_driver_param - Set driver parameter to share via firmware * @hw: pointer to the HW struct * @idx: parameter index to set |