i2c: i2c-stm32f7: Fix SDADEL minimum formula

It conforms with Reference Manual I2C timing section.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Signed-off-by: Bich Hemon <bich.hemon@st.com>
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 13e1213..4284fc9 100644 (file)
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -432,7 +432,7 @@ static int stm32f7_i2c_compute_timing(struct stm32f7_i2c_dev *i2c_dev,
                 STM32F7_I2C_ANALOG_FILTER_DELAY_MAX : 0);
        dnf_delay = setup->dnf * i2cclk;
 
-       sdadel_min = setup->fall_time - i2c_specs[setup->speed].hddat_min -
+       sdadel_min = i2c_specs[setup->speed].hddat_min + setup->fall_time -
                af_delay_min - (setup->dnf + 3) * i2cclk;
 
        sdadel_max = i2c_specs[setup->speed].vddat_max - setup->rise_time -