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

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Message-Id: <20210109124314.27466-6-wsa+renesas@sang-engineering.com>
Date:   Sat,  9 Jan 2021 13:43:09 +0100
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-i2c@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Wolfram Sang <wsa@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] i2c: uapi: add macro to describe support for all SMBus transfers

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@...g-engineering.com>
---
 include/uapi/linux/i2c.h | 5 +++++
 1 file changed, 5 insertions(+)

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
  */
-- 
2.29.2