This is a note to let you know that I've just added the patch titled i2c: meson: Fix wrong speed use from probe to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: i2c-meson-fix-wrong-speed-use-from-probe.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 4a9339c2acf5d68092c973a840021a7e56b93257 Author: Lucas Tanure <tanure@xxxxxxxxx> Date: Tue Mar 1 07:26:00 2022 +0000 i2c: meson: Fix wrong speed use from probe [ Upstream commit cb13aa16f34f794a9cee2626862af8a95f0f0ee9 ] Having meson_i2c_set_clk_div after i2c_add_adapter causes issues for client drivers that try to use the bus before the requested speed is applied. The bus can be used just after i2c_add_adapter, so move i2c_add_adapter to the final step as meson_i2c_set_clk_div needs to be called before the bus is used. Fixes: 09af1c2fa490 ("i2c: meson: set clock divider in probe instead of setting it for each transfer") Signed-off-by: Lucas Tanure <tanure@xxxxxxxxx> Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx> Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c index ef73a42577cc..07eb819072c4 100644 --- a/drivers/i2c/busses/i2c-meson.c +++ b/drivers/i2c/busses/i2c-meson.c @@ -465,18 +465,18 @@ static int meson_i2c_probe(struct platform_device *pdev) */ meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, 0); - ret = i2c_add_adapter(&i2c->adap); - if (ret < 0) { - clk_disable_unprepare(i2c->clk); - return ret; - } - /* Disable filtering */ meson_i2c_set_mask(i2c, REG_SLAVE_ADDR, REG_SLV_SDA_FILTER | REG_SLV_SCL_FILTER, 0); meson_i2c_set_clk_div(i2c, timings.bus_freq_hz); + ret = i2c_add_adapter(&i2c->adap); + if (ret < 0) { + clk_disable_unprepare(i2c->clk); + return ret; + } + return 0; }