Calculate I3C read timeout based on input size and SCL frequency

Default timeout used during reads falls short during read operations. Use input size and SCL frequency to calculate a proper timeout value. Signed-off-by: Tahsin Mutlugun <[email protected]>
analogdevicesinc · Dec 13, 2024 · 1c6d39e · 1c6d39e
1 parent eeb59b5
commit 1c6d39e
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/Libraries/PeriphDrivers/Source/I3C/i3c_reva.c b/Libraries/PeriphDrivers/Source/I3C/i3c_reva.c
@@ -582,6 +582,8 @@ int MXC_I3C_RevA_Controller_Transaction(mxc_i3c_reva_regs_t *i3c, const mxc_i3c_
     int ret;
     uint8_t readCount;
     uint16_t remaining;
+    uint32_t timeout;
+    uint32_t freq;
 
     if (MXC_I3C_RevA_Controller_GetState(i3c) != MXC_V_I3C_REVA_CONT_STATUS_STATE_IDLE &&
         MXC_I3C_RevA_Controller_GetState(i3c) != MXC_V_I3C_REVA_CONT_STATUS_STATE_SDR_NORM) {
@@ -633,8 +635,15 @@ int MXC_I3C_RevA_Controller_Transaction(mxc_i3c_reva_regs_t *i3c, const mxc_i3c_
                 goto err;
             }
 
+            if (req->is_i2c) {
+                freq = MXC_I3C_RevA_GetI2CFrequency(i3c);
+            } else {
+                freq = MXC_I3C_RevA_GetPPFrequency(i3c);
+            }
+            timeout = (uint32_t)(20 * 1000000 / freq) * readCount;
+
             ret = MXC_I3C_RevA_ReadRXFIFO(i3c, req->rx_buf + (req->rx_len - remaining), readCount,
-                                          1000);
+                                          timeout);
             if (ret == readCount) {
                 remaining -= readCount;
             } else {