diff options
Diffstat (limited to 'hdata/i2c.c')
| -rw-r--r-- | hdata/i2c.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/hdata/i2c.c b/hdata/i2c.c index 5a74a7f0..24e92573 100644 --- a/hdata/i2c.c +++ b/hdata/i2c.c @@ -31,6 +31,7 @@ static struct dt_node *get_i2cm_node(struct dt_node *xscom, int engine) { uint64_t xscom_base = P9_I2CM_XSCOM_BASE + P9_I2CM_XSCOM_SIZE * engine; struct dt_node *i2cm; + uint64_t freq, clock; i2cm = dt_find_by_name_addr(xscom, "i2cm", xscom_base); if (!i2cm) { @@ -45,8 +46,12 @@ static struct dt_node *get_i2cm_node(struct dt_node *xscom, int engine) dt_add_property_cells(i2cm, "#address-cells", 1); dt_add_property_cells(i2cm, "chip-engine#", engine); - /* XXX: verify this */ - dt_add_property_cells(i2cm, "clock-frequency", 150000000); + freq = dt_prop_get_u64_def(xscom, "bus-frequency", 0); + clock = (u32)(freq / 4); + if (clock) + dt_add_property_cells(i2cm, "clock-frequency", clock); + else + dt_add_property_cells(i2cm, "clock-frequency", 150000000); } return i2cm; @@ -73,7 +78,7 @@ static struct dt_node *get_bus_node(struct dt_node *i2cm, int port, int freq) * reduce the frequency to something that all devices * can tolerate. */ - dt_add_property_cells(bus, "bus-frequency", freq); + dt_add_property_cells(bus, "bus-frequency", freq * 1000); } return bus; |
