[PATCH 5.0 121/122] i2c: i2c-stm32f7: Fix SDADEL minimum formula

Greg Kroah-Hartman
2019-05-06T15:05:08Z

From: Nicolas Le Bayon <nicolas.le.bayon@st.com>

commit c86da50cfd840edf223a242580913692acddbcf6 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/i2c/busses/i2c-stm32f7.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -432,7 +432,7 @@ static int stm32f7_i2c_compute_timing(st
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 -