On Sat, Dec 21, 2013 at 3:13 AM, Sherman Yin <syin@xxxxxxxxxxxx> wrote: > Adds pinctrl driver devicetree binding for Broadcom Capri (BCM281xx) SoCs. > > Signed-off-by: Sherman Yin <syin@xxxxxxxxxxxx> > Reviewed-by: Christian Daudt <bcm@xxxxxxxxxxxxx> > Reviewed-by: Matt Porter <matt.porter@xxxxxxxxxx> > --- > v4: Changed valid values for "bias-pull-up" property for I2C pins. Expanded > pin configuration node example. Starting to look real good... > +Optional Properties (for standard pins): > + > +- function: String. Specifies the pin mux selection. Values > + must be one of: "alt1", "alt2", "alt3", "alt4" > +- input-schmitt-enable: No arguments. Enable schmitt-trigger mode. > +- input-schmitt-disable: No arguments. Disable schmitt-trigger mode. > +- bias-pull-up: No arguments. Pull up on pin. > +- bias-pull-down: No arguments. Pull down on pin. > +- bias-disable: No arguments. Disable pin bias. > +- slew-rate: Integer. Meaning depends on configured pin mux: > + *_SCL or *_SDA: > + 0: Standard(100kbps)& Fast(400kbps) mode > + 1: Highspeed (3.4Mbps) mode > + IC_DM or IC_DP: > + 0: normal slew rate > + 1: fast slew rate > + Otherwise: > + 0: fast slew rate > + 1: normal slew rate > +- input-enable: No arguements. Enable input (does not affect > + output.) > +- input-disable: No arguements. Disable input (does not affect > + output.) > +- drive-strength: Integer. Drive strength in mA. Valid values are > + 2, 4, 6, 8, 10, 12, 14, 16 mA. Also patch Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt Since you're adding generic properties. > +Optional Properties (for I2C pins): > + > +- function: String. Specifies the pin mux selection. Values > + must be one of: "alt1", "alt2", "alt3", "alt4" > +- bias-pull-up: Integer. Pull up strength in Ohm. There are 3 > + pull-up resisitors (1.2k, 1.8k, 2.7k) available > + in parallel for I2C pins, so the valid values > + are: 568, 720, 831, 1080, 1200, 1800, 2700 Ohm. Also patch Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt > +- bias-disable: No arguments. Disable pin bias. > +- slew-rate: Integer. Meaning depends on configured pin mux: > + *_SCL or *_SDA: > + 0: Standard(100kbps)& Fast(400kbps) mode > + 1: Highspeed (3.4Mbps) mode > + IC_DM or IC_DP: > + 0: normal slew rate > + 1: fast slew rate > + Otherwise: > + 0: fast slew rate > + 1: normal slew rate Hm that does not seem generic though, so let's not add this to the generic bindings. > +- input-enable: No arguements. Enable input (does not affect > + output.) > +- input-disable: No arguements. Disable input (does not affect > + output.) > + > +Optional Properties (for HDMI pins): > + > +- function: String. Specifies the pin mux selection. Values > + must be one of: "alt1", "alt2", "alt3", "alt4" > +- slew-rate: Integer. Controls slew rate. > + 0: Standard(100kbps)& Fast(400kbps) mode > + 1: Highspeed (3.4Mbps) mode Hmmmm slew rate is not specifiec in "bps" but rather in something like volts per second. But maybe it's best to keep this value driver-specific. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
