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| author | Klaus Jensen | 2022-06-30 09:21:14 +0200 |
|---|---|---|
| committer | Cédric Le Goater | 2022-06-30 09:21:14 +0200 |
| commit | a78e9839ae5eb0b95d9db8dd672e2977d2831605 (patch) | |
| tree | 1c0d7b678c12f55dd03ff41dc850578d29409be8 /hw/arm | |
| parent | hw/i2c: support multiple masters (diff) | |
| download | qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.tar.gz qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.tar.xz qemu-a78e9839ae5eb0b95d9db8dd672e2977d2831605.zip | |
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/arm')
| -rw-r--r-- | hw/arm/pxa2xx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/arm/pxa2xx.c b/hw/arm/pxa2xx.c index f4f687df68..93dda83d7a 100644 --- a/hw/arm/pxa2xx.c +++ b/hw/arm/pxa2xx.c @@ -1305,6 +1305,8 @@ static int pxa2xx_i2c_event(I2CSlave *i2c, enum i2c_event event) case I2C_NACK: s->status |= 1 << 1; /* set ACKNAK */ break; + default: + return -1; } pxa2xx_i2c_update(s); |