i2c: stm32f7: improve loopback in timing algorithm

This avoids useless loops inside the I2C timing algorithm.
Actually, we support only one possible solution per prescaler value.
So after finding a solution with a prescaler, the algorithm can
switch directly to the next prescaler value.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

diff --git a/drivers/i2c/stm32f7_i2c.c b/drivers/i2c/stm32f7_i2c.c
index e7e0268ebeb8ea94e594aa94b00e54f29a4cf7dd..50c4fd0de23ab7e8d54ab918a65336a2a56adc99 100644 (file)
--- a/drivers/i2c/stm32f7_i2c.c
+++ b/drivers/i2c/stm32f7_i2c.c
@@ -540,8 +540,12 @@ static int stm32_i2c_compute_solutions(struct stm32_i2c_setup *setup,
                                        p_prev = p;
 
                                        list_add_tail(&v->node, solutions);
+                                       break;
                                }
                        }
+
+                       if (p_prev == p)
+                               break;
                }
        }