diff options
| -rw-r--r-- | drivers/i2c/stm32f7_i2c.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/i2c/stm32f7_i2c.c b/drivers/i2c/stm32f7_i2c.c index e71a0e0aa39..7e6c65fadce 100644 --- a/drivers/i2c/stm32f7_i2c.c +++ b/drivers/i2c/stm32f7_i2c.c @@ -45,6 +45,8 @@ struct stm32_i2c_regs { /* STM32 I2C control 1 */ #define STM32_I2C_CR1_ANFOFF BIT(12) +#define STM32_I2C_CR1_DNF_MASK GENMASK(11, 8) +#define STM32_I2C_CR1_DNF(n) (((n) & 0xf) << 8) #define STM32_I2C_CR1_ERRIE BIT(7) #define STM32_I2C_CR1_TCIE BIT(6) #define STM32_I2C_CR1_STOPIE BIT(5) @@ -106,7 +108,7 @@ struct stm32_i2c_regs { #define STM32_I2C_MAX_LEN 0xff #define STM32_I2C_DNF_DEFAULT 0 -#define STM32_I2C_DNF_MAX 16 +#define STM32_I2C_DNF_MAX 15 #define STM32_I2C_ANALOG_FILTER_DELAY_MIN 50 /* ns */ #define STM32_I2C_ANALOG_FILTER_DELAY_MAX 260 /* ns */ @@ -155,7 +157,7 @@ struct stm32_i2c_spec { * @clock_src: I2C clock source frequency (Hz) * @rise_time: Rise time (ns) * @fall_time: Fall time (ns) - * @dnf: Digital filter coefficient (0-16) + * @dnf: value of digital filter to apply * @analog_filter: Analog filter delay (On/Off) */ struct stm32_i2c_setup { @@ -842,6 +844,10 @@ static int stm32_i2c_hw_config(struct stm32_i2c_priv *i2c_priv) else setbits_le32(®s->cr1, STM32_I2C_CR1_ANFOFF); + /* Program the Digital Filter */ + clrsetbits_le32(®s->cr1, STM32_I2C_CR1_DNF_MASK, + STM32_I2C_CR1_DNF(i2c_priv->setup.dnf)); + setbits_le32(®s->cr1, STM32_I2C_CR1_PE); return 0; |