Messages in this thread | | | Subject | Re: [PATCH 02/12] i2c: designware-master: use core to detect 'no zero length' quirk | From | Jarkko Nikula <> | Date | Thu, 2 Aug 2018 17:00:59 +0300 |
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On 07/23/2018 11:26 PM, Wolfram Sang wrote: > And don't reimplement in the driver. > > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> > --- > > Only build tested. > > drivers/i2c/busses/i2c-designware-master.c | 12 +++++------- > 1 file changed, 5 insertions(+), 7 deletions(-) > I tested this with patch 1 and I like it since with these patches the test is done before firing up the HW, waiting for an interrupt and then see the length is invalid for us.
i2ctransfer -f 8 r0@0x10
Before (with i2c_designware debugging on): [ 15.607283] i2c_designware i2c_designware.1: i2c_dw_xfer: msgs: 1 [ 15.711988] i2c_designware i2c_designware.1: enabled=0x1 stat=0x10 [ 15.712002] i2c_designware i2c_designware.1: i2c_dw_xfer_msg: invalid message length Error: Sending messages failed: Invalid argument
After: [ 25.838661] i2c i2c-8: adapter quirk: no zero length (addr 0x0010, size 0, read) Error: Sending messages failed: Operation not supported
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
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