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Since the Mcore images of 8qxp/8qm/8dxl platforms are not maintained
and cannot support a maximum buffer size of 478bytes of i2c buffer,
these platforms are using origin compatible string.
The v1 version only supports I2C buffer with a fixed length of 16 bytes.
For the two platforms of 8mp/8ulp, the mcore image supports a maximum
i2c buffer size of 478bytes.
Therefore, use v2 compatible string to add support for dynamic i2c
buffer sizes.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
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Expand the transfer buffer of I2C over rpmsg bus to 478 bytes.
Correct and update the protocol in comment.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Acked-by: Haibo Chen <haibo.chen@nxp.com>
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Add defer probe when rpbus probe, so if the rpmsg channel is not
created, the rpbus will try to probe later.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
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For some chips may need long time to get the response from M4 sometimes,
enlarge timeout to 500ms.
Add a judgement to check if the received data is the current transfer
wanted.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit 222e201b520cbd01b611fc45ae2f6b2f0b9d73a1)
(cherry picked from commit 6cfc8578ccce0e664b5428738090a51322773366)
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I2c_lock_bus function in i2c-core-base will not stop the transfer to
different devices on different buses at the same time.
Since the multiple rpmsg i2c buses share one rpmsg channel, so it has to
add mutex to protect rpmsg resource accessing.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit d592afe9018e193f675b8c710fb1e66e44851ec8)
(cherry picked from commit 44622ff8c847031d65fd75a03459061faf07d0f2)
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The alias ID must be defined in device tree, because
that will be used as BUS ID to Cortex M4. If the alias ID
not defined, linux kernel will automatically allocate one
ID which might not be the same number used in Cortex M4 and
Cortex M4 will not send msg to I2C controller.
So let's add BUG_ON to catch issue as earlier as possible to avoid
wasting efforts.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit b9ff20355040d4bece8357a0af31bc5fca191cee)
(cherry picked from commit 8e509705ddd1658ceaea05a65dc6b58d448d2037)
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Add virtual i2c driver to send SRTM i2c messages to M4.
Each virtual I2C bus has a specal bus id, which is abstracted by M4.
Each SRTM message include a bus id for the bus which the device is on.
Virtual i2c rpmsg bus will bind rpbus nodes with compatible string
"fsl,i2c-rpbus". And "rpmsg-i2c-channel" will probe only one rpmsg
channel for all rpbuses.
This virtual i2c driver depends on CONFIG_I2C and CONFIG_RPMSG.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
(cherry picked from commit 9feeac93a7d91ce67537a8a6c67e624eb7986a01)
(cherry picked from commit 379ab8392ef404dc7eea9a7492231a9d9d250ed5)
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