A flag for i2c-messages to allow short time out. Some chips causes
time out always with certain kind of operations (like sw-reset commands).
There is no point of waiting full timeout in that case.
When I2C message is send with I2C_M_SHORT_TIME out flag, adapter is allowed
to use shorter timeout and release the bus faster.
Signed-off-by: Samu Onkalo <samu.p.onkalo@xxxxxxxxx>
---
drivers/i2c/i2c-core.c | 2 +-
include/linux/i2c.h | 1 +
2 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 6649176..8c0e443 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -2077,7 +2077,7 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
int try;
s32 res;
- flags &= I2C_M_TEN | I2C_CLIENT_PEC;
+ flags &= I2C_M_TEN | I2C_CLIENT_PEC | I2C_M_SHORT_TIMEOUT;
if (adapter->algo->smbus_xfer) {
i2c_lock_adapter(adapter);
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 4bae0b7..5fc016a 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -514,6 +514,7 @@ struct i2c_msg {
#define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
+#define I2C_M_SHORT_TIMEOUT 0x0200 /* Use with known timeout cases */
__u16 len; /* msg length */
__u8 *buf; /* pointer to msg data */
};
--
1.6.0.4
--
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