From: Andy Shevchenko Date: Thu, 13 Feb 2025 14:07:15 +0000 (+0200) Subject: i2c: Introduce i2c_10bit_addr_*_from_msg() helpers X-Git-Tag: v6.15-rc1~74^2~1^2~30 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=e794dc30be8b69e44646a162db09b43f719525b7;p=linux-2.6-block.git i2c: Introduce i2c_10bit_addr_*_from_msg() helpers There are already a lot of drivers that have been using i2c_8bit_addr_from_msg() for 7-bit addresses, now it's time to have the similar for 10-bit addresses. Signed-off-by: Andy Shevchenko Reviewed-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20250213141045.2716943-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andi Shyti --- diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 2b2af24d2a43..1e35b1e23165 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -952,6 +952,21 @@ static inline u8 i2c_8bit_addr_from_msg(const struct i2c_msg *msg) return (msg->addr << 1) | (msg->flags & I2C_M_RD); } +/* + * 10-bit address + * addr_1: 5'b11110 | addr[9:8] | (R/nW) + * addr_2: addr[7:0] + */ +static inline u8 i2c_10bit_addr_hi_from_msg(const struct i2c_msg *msg) +{ + return 0xf0 | ((msg->addr & GENMASK(9, 8)) >> 7) | (msg->flags & I2C_M_RD); +} + +static inline u8 i2c_10bit_addr_lo_from_msg(const struct i2c_msg *msg) +{ + return msg->addr & GENMASK(7, 0); +} + u8 *i2c_get_dma_safe_msg_buf(struct i2c_msg *msg, unsigned int threshold); void i2c_put_dma_safe_msg_buf(u8 *buf, struct i2c_msg *msg, bool xferred);