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i2c: stm32: fix comment and remove unused AUTOEND bit

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Comment within stm32_i2c_message_start is misleading, indicating
that AUTOEND bit is setted while it is actually cleared.
Moreover, the bit is actually never setted so there is no need
to clear it hence get rid of this bit clear and the bit macro
as well.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Alain Volmat 2022-09-12 10:41:58 +02:00 • committed by Patrick Delaunay
parent 9ef530f196
commit 923d80288a
1 changed files with 2 additions and 4 deletions
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6
drivers/i2c/stm32f7_i2c.c
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@ -57,7 +57,6 @@ struct stm32_i2c_regs {
#define STM32_I2C_CR1_PE BIT(0)
/* STM32 I2C control 2 */
#define STM32_I2C_CR2_AUTOEND BIT(25)
#define STM32_I2C_CR2_RELOAD BIT(24)
#define STM32_I2C_CR2_NBYTES_MASK GENMASK(23, 16)
#define STM32_I2C_CR2_NBYTES(n) ((n & 0xff) << 16)
@ -304,9 +303,8 @@ static void stm32_i2c_message_start(struct stm32_i2c_priv *i2c_priv,
cr2 |= STM32_I2C_CR2_SADD7(msg->addr);
}
/* Set nb bytes to transfer and reload or autoend bits */
cr2 &= ~(STM32_I2C_CR2_NBYTES_MASK | STM32_I2C_CR2_RELOAD |
STM32_I2C_CR2_AUTOEND);
/* Set nb bytes to transfer and reload (if needed) */
cr2 &= ~(STM32_I2C_CR2_NBYTES_MASK | STM32_I2C_CR2_RELOAD);
if (msg->len > STM32_I2C_MAX_LEN) {
cr2 |= STM32_I2C_CR2_NBYTES(STM32_I2C_MAX_LEN);
cr2 |= STM32_I2C_CR2_RELOAD;