diff options
| author | Klaus Jensen <k.jensen@samsung.com> | 2022-06-30 09:21:14 +0200 |
|---|---|---|
| committer | Cédric Le Goater <clg@kaod.org> | 2022-06-30 09:21:14 +0200 |
| commit | a78e9839ae5eb0b95d9db8dd672e2977d2831605 (patch) | |
| tree | 1c0d7b678c12f55dd03ff41dc850578d29409be8 /hw/display | |
| parent | 37fa5ca42623ef08ac99c8d927b6a3af0c76dc7b (diff) | |
| download | qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.zip qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.tar.gz qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.tar.bz2 | |
hw/i2c: add asynchronous send
Add an asynchronous version of i2c_send() that requires the slave to
explicitly acknowledge on the bus with i2c_ack().
The current master must use the new i2c_start_send_async() to indicate
that it wants to do an asynchronous transfer. This allows the i2c core
to check if the target slave supports this or not. This approach relies
on adding a new enum i2c_event member, which is why a bunch of other
devices needs changes in their event handling switches.
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Message-Id: <20220601210831.67259-5-its@irrelevant.dk>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220630045133.32251-6-me@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Diffstat (limited to 'hw/display')
| -rw-r--r-- | hw/display/sii9022.c | 2 | ||||
| -rw-r--r-- | hw/display/ssd0303.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/hw/display/sii9022.c b/hw/display/sii9022.c index b591a58..664fd40 100644 --- a/hw/display/sii9022.c +++ b/hw/display/sii9022.c @@ -76,6 +76,8 @@ static int sii9022_event(I2CSlave *i2c, enum i2c_event event) break; case I2C_NACK: break; + default: + return -1; } return 0; diff --git a/hw/display/ssd0303.c b/hw/display/ssd0303.c index aeae22d..d67b0ad 100644 --- a/hw/display/ssd0303.c +++ b/hw/display/ssd0303.c @@ -196,6 +196,8 @@ static int ssd0303_event(I2CSlave *i2c, enum i2c_event event) case I2C_NACK: /* Nothing to do. */ break; + default: + return -1; } return 0; |