Commit e794dc30 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Andi Shyti
Browse files

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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250213141045.2716943-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarAndi Shyti <andi.shyti@kernel.org>
parent d4f35233

include/linux/i2c.h

+15 −0
Original line number Diff line number Diff line
@@ -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);