From: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Date: Thu, 18 Apr 2019 15:32:43 +0000 (+0200)
Subject: i2c: stm32f7: improve loopback in timing algorithm
X-Git-Tag: v2019.07-rc3~8^2~17
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=5237f37e5c35052533588fe0a53febad2f047d70;p=oweals%2Fu-boot.git

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 e7e0268ebe..50c4fd0de2 100644
--- 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;
 		}
 	}