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i2c: Introduce i2c_10bit_addr_*_from_msg() helpers

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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 <andriy.shevchenko@linux.intel.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250213141045.2716943-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Andy Shevchenko
2025-02-13 16:07:15 +02:00
committed by Andi Shyti
parent d4f35233a6
commit e794dc30be
1 changed files with 15 additions and 0 deletions
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15
include/linux/i2c.h
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@@ -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);