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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-02-13 17:07:15 +0300 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2025-03-18 23:53:53 +0300 |
| commit | e794dc30be8b69e44646a162db09b43f719525b7 (patch) | |
| tree | ded8a2abd260357b748e11f12777515b9a62cffa | |
| parent | d4f35233a6345f62637463ef6e0708f44ffaa583 (diff) | |
| download | linux-e794dc30be8b69e44646a162db09b43f719525b7.tar.xz | |
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 <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>
| -rw-r--r-- | include/linux/i2c.h | 15 |
1 files changed, 15 insertions, 0 deletions
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); |