[PATCH v2 01/10] i2c: Introduce i2c_10bit_addr_*_from_msg() helpers
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2025-02-13 14:10:59
Also in:
linux-i2c, linux-mediatek, linux-renesas-soc, lkml
Subsystem:
i2c subsystem, the rest · Maintainers:
Andi Shyti, Linus Torvalds
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> --- include/linux/i2c.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 997e80649889..e23b373b6b57 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h@@ -952,6 +952,20 @@ 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);
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2.45.1.3035.g276e886db78b