openwrt/target/linux/bcm27xx/patches-6.6/950-1003-i2c-designware-Make-the-SDA-hold-time-half-LCNT.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

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Diff

From 7b340aa70dbea4096f949a9ddceb169079a0603b Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Thu, 4 Apr 2024 17:03:33 +0100
Subject: [PATCH 1003/1085] i2c: designware: Make the SDA hold time half LCNT
In the absence of a value in Device Tree, set the SDA hold time to half
the SCL low time.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
drivers/i2c/busses/i2c-designware-master.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -194,6 +194,9 @@ static int i2c_dw_set_timings_master(str
dev->hs_hcnt, dev->hs_lcnt);
}
+ if (!dev->sda_hold_time)
+ dev->sda_hold_time = lcnt / 2;
+
ret = i2c_dw_set_sda_hold(dev);
if (ret)
return ret;