On Wed, 2017-08-09 at 17:40 +0800, Yingjoe Chen wrote:
> On Wed, 2017-08-09 at 15:43 +0800, Jun Gao wrote:
> > From: Jun Gao <jun.gao@xxxxxxxxxxxx>
> >
> > Add i2c compatible for MT7622. Compare to MT8173 i2c controller,
> > MT7622 limit message size to 255, and not support 4GB DMA mode.
>
>
> Jun,
>
> Do you mean message numbers?
>
>
> Joe.C
>
Yes, bit7~bit0 of i2c register TRANSAC_LEN will be used as message
numbers.
Jun
> >
> > Signed-off-by: Jun Gao <jun.gao@xxxxxxxxxxxx>
> > ---
> > drivers/i2c/busses/i2c-mt65xx.c | 18 ++++++++++++++++++
> > 1 file changed, 18 insertions(+)
> >
> > diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> > index 9bedf0b..2c7f847 100644
> > --- a/drivers/i2c/busses/i2c-mt65xx.c
> > +++ b/drivers/i2c/busses/i2c-mt65xx.c
> > @@ -172,6 +172,14 @@ struct mtk_i2c {
> > .max_comb_2nd_msg_len = 31,
> > };
> >
> > +static const struct i2c_adapter_quirks mt7622_i2c_quirks = {
> > + .max_num_msgs = 255,
> > + .max_write_len = 65535,
> > + .max_read_len = 65535,
> > + .max_comb_1st_msg_len = 65535,
> > + .max_comb_2nd_msg_len = 65535,
> > +};
> > +
> > static const struct mtk_i2c_compatible mt6577_compat = {
> > .quirks = &mt6577_i2c_quirks,
> > .pmic_i2c = 0,
> > @@ -190,6 +198,15 @@ struct mtk_i2c {
> > .support_33bits = 0,
> > };
> >
> > +static const struct mtk_i2c_compatible mt7622_compat = {
> > + .quirks = &mt7622_i2c_quirks,
> > + .pmic_i2c = 0,
> > + .dcm = 1,
> > + .auto_restart = 1,
> > + .aux_len_reg = 1,
> > + .support_33bits = 0,
> > +};
> > +
> > static const struct mtk_i2c_compatible mt8173_compat = {
> > .pmic_i2c = 0,
> > .dcm = 1,
> > @@ -201,6 +218,7 @@ struct mtk_i2c {
> > static const struct of_device_id mtk_i2c_of_match[] = {
> > { .compatible = "mediatek,mt6577-i2c", .data = &mt6577_compat },
> > { .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
> > + { .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
> > { .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
> > {}
> > };
>
>
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