On Thu, Dec 03, 2015 at 04:51:32PM +0100, Wolfram Sang wrote: > From: Wolfram Sang <[email protected]> > > Inspired from the i2c-rk3x driver (thanks guys!) but refactored and > extended. See built-in docs for further information. > > Signed-off-by: Wolfram Sang <[email protected]> > --- > drivers/i2c/i2c-core.c | 50 > ++++++++++++++++++++++++++++++++++++++++++++++++++ > include/linux/i2c.h | 22 ++++++++++++++++++++++ > 2 files changed, 72 insertions(+) > > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c > index ba8eb087f22465..5c269dd51b2de7 100644 > --- a/drivers/i2c/i2c-core.c > +++ b/drivers/i2c/i2c-core.c > @@ -1438,6 +1438,56 @@ static void of_i2c_register_devices(struct i2c_adapter > *adap) > } > } > > +/** > + * of_i2c_parse_timings - get I2C related timing parameters from DT > + * @node: The DT node to scan for I2C timing properties > + * @t: the i2c_timings struct to be filled with values > + * @use_defaults: bool to use sane defaults derived from the I2C > specification > + * when properties are not found, otherwise use 0 > + * > + * Scan the node pointer for the generic I2C DT properties describing timing > + * parameters for the signal and fill the given struct with the results. If a > + * property was not found and use_defaults was true, then maximum timings are > + * assumed which are derived from the I2C specification. If use_defaults is > not > + * used, the result will be 0, so drivers can apply their own defaults later. > + * The latter is mainly intended for avoiding regressions of existing drivers > + * which want to switch to this function. New drivers almost always should > use > + * the defaults. > + */ > +void of_i2c_parse_timings(struct device_node *node, struct i2c_timings *t, > bool use_defaults) > +{ > + memset(t, 0, sizeof(*t)); > + > + if (of_property_read_u32(node, "clock-frequency", &t->bus_freq_hz) && > use_defaults) > + t->bus_freq_hz = 100000;
Why not create device_i2c_parse_timings() instead and use unified device properties API? -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
