On Sat, Apr 30, 2022 at 02:49:05PM +0300, michaelsh@xxxxxxxxxx wrote: > From: Michael Shych <michaelsh@xxxxxxxxxx> > > Add description of emc2305 driver. > > Signed-off-by: Michael Shych <michaelsh@xxxxxxxxxx> > Reviewed-by: Vadim Pasternak <vadimp@xxxxxxxxxx> > --- > Documentation/hwmon/emc2305.rst | 40 ++++++++++++++++++++++++++++++++++++++++ Also add to index.rst. > 1 file changed, 40 insertions(+) > create mode 100644 Documentation/hwmon/emc2305.rst > > diff --git a/Documentation/hwmon/emc2305.rst b/Documentation/hwmon/emc2305.rst > new file mode 100644 > index 000000000000..258da49d18f9 > --- /dev/null > +++ b/Documentation/hwmon/emc2305.rst > @@ -0,0 +1,40 @@ > +.. SPDX-License-Identifier: GPL-2.0 > + > +Kernel driver emc2305 > +===================== > + > +Supported chips: > + Microchip EMC2305, EMC2303, EMC2302, EMC2301 > + > + Addresses scanned: I2C 0x27, 0x2c, 0x2d, 0x2e, 0x2f, 0x4c, 0x4d > + Prefixes: 'emc2305' > + > + Datasheet: Publicly available at the Microchip website : > + https://www.microchip.com/en-us/product/EMC2305 > + > +Description: > +----------- > +This driver implements support for Microchip EMC2301/2/3/5 RPM-based PWM Fan Controller. > +The EMC2305 Fan Controller supports up to 5 independently controlled PWM fan drives. > +Fan rotation speeds are reported in RPM. > +The driver supports the RPM-based PWM control to keep a fan at the desired speed. > +The driver provides the possibility to have one common PWM interface for all FANs > +or up to the maximum available or configured independent PWMs. > + > +The driver provides the following sysfs interfaces in hwmon subsystem: > + > +================= == =================================================== > +fan[1-5]_fault RO files for tachometers TACH1-TACH5 fault indication > +fan[1-5]_input RO files for tachometers TACH1-TACH5 input (in RPM) > +pwm[1-5] RW file for fan[1-5] target duty cycle (0..255) > +================= == =================================================== > + > +sysfs interfaces in thermal subsystem: > + > +================= == ======================================================================== > +cur_state RW file for the current cooling state of the cooling device (0..max_state) > +max_state RO file for the maximum cooling state of the cooling device > +================= == ======================================================================== > + > +Configuration is possible via device tree: > +Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml > -- > 2.14.1 >
