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[5/8] i2c: uapi: add macro to describe support for all SMBus transfers

Message ID 20210109124314.27466-6-wsa+renesas@sang-engineering.com (mailing list archive)
State Accepted
Commit 21500aa84024b3fc541197b2041d80538539740d
Delegated to: Geert Uytterhoeven
Headers show
Series i2c: improve RECV_LEN documentation & usage | expand

Commit Message

Wolfram Sang Jan. 9, 2021, 12:43 p.m. UTC
Some I2C bus master drivers which support I2C_M_RECV_LEN do not set
the functionality bits of the now supported SMBus transfers. Add a
convenience macro to make this very simple.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 include/uapi/linux/i2c.h | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h
index 7786551eb177..92326ebde350 100644
--- a/include/uapi/linux/i2c.h
+++ b/include/uapi/linux/i2c.h
@@ -129,6 +129,11 @@  struct i2c_msg {
 					 I2C_FUNC_SMBUS_I2C_BLOCK | \
 					 I2C_FUNC_SMBUS_PEC)
 
+/* if I2C_M_RECV_LEN is also supported */
+#define I2C_FUNC_SMBUS_EMUL_ALL		(I2C_FUNC_SMBUS_EMUL | \
+					 I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
+					 I2C_FUNC_SMBUS_BLOCK_PROC_CALL)
+
 /*
  * Data for SMBus Messages
  */