1 files changed, 18 insertions, 0 deletions
diff --git a/hw/i2c/pmbus_device.c b/hw/i2c/pmbus_device.c
index 8cb9db0..62885fa 100644
--- a/hw/i2c/pmbus_device.c
+++ b/hw/i2c/pmbus_device.c
@@ -28,6 +28,24 @@ uint32_t pmbus_direct_mode2data(PMBusCoefficients c, uint16_t value)
     return x;
 }
 
+uint16_t pmbus_data2linear_mode(uint16_t value, int exp)
+{
+    /* L = D * 2^(-e) */
+    if (exp < 0) {
+        return value << (-exp);
+    }
+    return value >> exp;
+}
+
+uint16_t pmbus_linear_mode2data(uint16_t value, int exp)
+{
+    /* D = L * 2^e */
+    if (exp < 0) {
+        return value >> (-exp);
+    }
+    return value << exp;
+}
+
 void pmbus_send(PMBusDevice *pmdev, const uint8_t *data, uint16_t len)
 {
     if (pmdev->out_buf_len + len > SMBUS_DATA_MAX_LEN) {