Hi Wolfram,
You can add my
Acked-by and Tested-By: Ludovic Desroches <ludovic.desroc...@atmel.com>
Tested on sama5d3, some problems with at24 eeprom on sama5d4 but it
doesn't come from the i2c quirks patch series.
Regards
Ludovic
On Sun, Mar 08, 2015 at 09:28:45AM +0100, Wolfram Sang wrote:
> On Wed, Feb 25, 2015 at 05:01:54PM +0100, Wolfram Sang wrote:
> > From: Wolfram Sang <wsa+rene...@sang-engineering.com>
> >
> > Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
>
> Hi Ludovic,
>
> if you have a few minutes, could you please test this series? I'd like to
> include it in 4.1. and because at91 is using the quirk infrastructure in
> a more complex way, it is a really good test candidate.
>
> Thanks,
>
> Wolfram
>
> > ---
> > drivers/i2c/busses/i2c-at91.c | 32 +++++++++++---------------------
> > 1 file changed, 11 insertions(+), 21 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
> > index 636fd2efad8850..b3a70e8fc653c5 100644
> > --- a/drivers/i2c/busses/i2c-at91.c
> > +++ b/drivers/i2c/busses/i2c-at91.c
> > @@ -487,30 +487,10 @@ static int at91_twi_xfer(struct i2c_adapter *adap,
> > struct i2c_msg *msg, int num)
> > if (ret < 0)
> > goto out;
> >
> > - /*
> > - * The hardware can handle at most two messages concatenated by a
> > - * repeated start via it's internal address feature.
> > - */
> > - if (num > 2) {
> > - dev_err(dev->dev,
> > - "cannot handle more than two concatenated messages.\n");
> > - ret = 0;
> > - goto out;
> > - } else if (num == 2) {
> > + if (num == 2) {
> > int internal_address = 0;
> > int i;
> >
> > - if (msg->flags & I2C_M_RD) {
> > - dev_err(dev->dev, "first transfer must be write.\n");
> > - ret = -EINVAL;
> > - goto out;
> > - }
> > - if (msg->len > 3) {
> > - dev_err(dev->dev, "first message size must be <= 3.\n");
> > - ret = -EINVAL;
> > - goto out;
> > - }
> > -
> > /* 1st msg is put into the internal address, start with 2nd */
> > m_start = &msg[1];
> > for (i = 0; i < msg->len; ++i) {
> > @@ -540,6 +520,15 @@ out:
> > return ret;
> > }
> >
> > +/*
> > + * The hardware can handle at most two messages concatenated by a
> > + * repeated start via it's internal address feature.
> > + */
> > +static struct i2c_adapter_quirks at91_twi_quirks = {
> > + .flags = I2C_AQ_COMB | I2C_AQ_COMB_WRITE_FIRST | I2C_AQ_COMB_SAME_ADDR,
> > + .max_comb_1st_msg_len = 3,
> > +};
> > +
> > static u32 at91_twi_func(struct i2c_adapter *adapter)
> > {
> > return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL
> > @@ -777,6 +766,7 @@ static int at91_twi_probe(struct platform_device *pdev)
> > dev->adapter.owner = THIS_MODULE;
> > dev->adapter.class = I2C_CLASS_DEPRECATED;
> > dev->adapter.algo = &at91_twi_algorithm;
> > + dev->adapter.quirks = &at91_twi_quirks;
> > dev->adapter.dev.parent = dev->dev;
> > dev->adapter.nr = pdev->id;
> > dev->adapter.timeout = AT91_I2C_TIMEOUT;
> > --
> > 2.1.4
> >
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