* [PATCH v2 0/2] hwmon: (adt7475): inverted PWM output @ 2018-11-08 22:56 Chris Packham 2018-11-08 22:56 ` [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 Chris Packham 2018-11-08 22:56 ` [PATCH v2 2/2] hwmon: (adt7475): add support for inverting the pwm output Chris Packham 0 siblings, 2 replies; 8+ messages in thread From: Chris Packham @ 2018-11-08 22:56 UTC (permalink / raw) To: linux, robh+dt, jdelvare Cc: linux-hwmon, devicetree, linux-kernel, Chris Packham Hi, I have a hardware design that requires logic low PWM output. The adt7475 supports this but the current driver does not have any way of configuring this. I've gone with a device-tree property as this is an artifact of the hardware design and not something that might be configured via sysfs. Chris Packham (2): dt-bindings: hwmon: add binding documentation for adt7475 hwmon: (adt7475): add support for inverting the pwm output .../devicetree/bindings/hwmon/adt7475.txt | 24 ++++++++++++++++ .../devicetree/bindings/trivial-devices.txt | 4 --- drivers/hwmon/adt7475.c | 28 +++++++++++++++++++ 3 files changed, 52 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt -- 2.19.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-08 22:56 [PATCH v2 0/2] hwmon: (adt7475): inverted PWM output Chris Packham @ 2018-11-08 22:56 ` Chris Packham 2018-11-12 0:34 ` Chris Packham 2018-11-17 15:29 ` Rob Herring 2018-11-08 22:56 ` [PATCH v2 2/2] hwmon: (adt7475): add support for inverting the pwm output Chris Packham 1 sibling, 2 replies; 8+ messages in thread From: Chris Packham @ 2018-11-08 22:56 UTC (permalink / raw) To: linux, robh+dt, jdelvare Cc: linux-hwmon, devicetree, linux-kernel, Chris Packham, Mark Rutland With the addition of the invert-pwm property the adt7475 needs its own binding documentation rather being captured under trivial-devices.txt. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> --- Changes in v2: - use pwm-polarity attiribute to indicate normal or inverted polarity. .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ .../devicetree/bindings/trivial-devices.txt | 4 ---- 2 files changed, 24 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt new file mode 100644 index 000000000000..d9212b5e9036 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt @@ -0,0 +1,24 @@ +*ADT7475 hwmon sensor. + +Required properties: +- compatible: One of + "adi,adt7473" + "adi,adt7475" + "adi,adt7476" + "adi,adt7490" + +- reg: I2C address + +optional properties: + +- pwm-polarity: This configures the polarity of the PWM. 0 + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. + +Example: + +hwmon@2e { + compatible = ; + reg = <0x2e>; + pwm-polarity = <1>; +}; diff --git a/Documentation/devicetree/bindings/trivial-devices.txt b/Documentation/devicetree/bindings/trivial-devices.txt index 69c934aec13b..4f29100d6bbf 100644 --- a/Documentation/devicetree/bindings/trivial-devices.txt +++ b/Documentation/devicetree/bindings/trivial-devices.txt @@ -14,10 +14,6 @@ ad,ad7414 SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert an ad,adm9240 ADM9240: Complete System Hardware Monitor for uProcessor-Based Systems adi,adt7461 +/-1C TDM Extended Temp Range I.C adt7461 +/-1C TDM Extended Temp Range I.C -adi,adt7473 +/-1C TDM Extended Temp Range I.C -adi,adt7475 +/-1C TDM Extended Temp Range I.C -adi,adt7476 +/-1C TDM Extended Temp Range I.C -adi,adt7490 +/-1C TDM Extended Temp Range I.C adi,adxl345 Three-Axis Digital Accelerometer adi,adxl346 Three-Axis Digital Accelerometer (backward-compatibility value "adi,adxl345" must be listed too) ams,iaq-core AMS iAQ-Core VOC Sensor -- 2.19.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-08 22:56 ` [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 Chris Packham @ 2018-11-12 0:34 ` Chris Packham 2018-11-17 15:29 ` Rob Herring 1 sibling, 0 replies; 8+ messages in thread From: Chris Packham @ 2018-11-12 0:34 UTC (permalink / raw) To: linux, robh+dt, jdelvare Cc: linux-hwmon, devicetree, linux-kernel, Mark Rutland On 9/11/18 11:56 AM, Chris Packham wrote: > With the addition of the invert-pwm property the adt7475 needs its own > binding documentation rather being captured under trivial-devices.txt. > > Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> > --- > Changes in v2: > - use pwm-polarity attiribute to indicate normal or inverted polarity. > > .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ > .../devicetree/bindings/trivial-devices.txt | 4 ---- > 2 files changed, 24 insertions(+), 4 deletions(-) > create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt > > diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt > new file mode 100644 > index 000000000000..d9212b5e9036 > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt > @@ -0,0 +1,24 @@ > +*ADT7475 hwmon sensor. > + > +Required properties: > +- compatible: One of > + "adi,adt7473" > + "adi,adt7475" > + "adi,adt7476" > + "adi,adt7490" > + > +- reg: I2C address > + > +optional properties: > + > +- pwm-polarity: This configures the polarity of the PWM. 0 > + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 > + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. > + > +Example: > + > +hwmon@2e { > + compatible = ; Oops. I should include a working example. I've fixed this locally but I'll hold off on sending v3 to see if there is any additional feedback. > + reg = <0x2e>; > + pwm-polarity = <1>; > +}; > diff --git a/Documentation/devicetree/bindings/trivial-devices.txt b/Documentation/devicetree/bindings/trivial-devices.txt > index 69c934aec13b..4f29100d6bbf 100644 > --- a/Documentation/devicetree/bindings/trivial-devices.txt > +++ b/Documentation/devicetree/bindings/trivial-devices.txt > @@ -14,10 +14,6 @@ ad,ad7414 SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert an > ad,adm9240 ADM9240: Complete System Hardware Monitor for uProcessor-Based Systems > adi,adt7461 +/-1C TDM Extended Temp Range I.C > adt7461 +/-1C TDM Extended Temp Range I.C > -adi,adt7473 +/-1C TDM Extended Temp Range I.C > -adi,adt7475 +/-1C TDM Extended Temp Range I.C > -adi,adt7476 +/-1C TDM Extended Temp Range I.C > -adi,adt7490 +/-1C TDM Extended Temp Range I.C > adi,adxl345 Three-Axis Digital Accelerometer > adi,adxl346 Three-Axis Digital Accelerometer (backward-compatibility value "adi,adxl345" must be listed too) > ams,iaq-core AMS iAQ-Core VOC Sensor > ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-08 22:56 ` [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 Chris Packham 2018-11-12 0:34 ` Chris Packham @ 2018-11-17 15:29 ` Rob Herring 2018-11-18 22:56 ` Guenter Roeck 1 sibling, 1 reply; 8+ messages in thread From: Rob Herring @ 2018-11-17 15:29 UTC (permalink / raw) To: Chris Packham Cc: linux, jdelvare, linux-hwmon, devicetree, linux-kernel, Mark Rutland On Fri, Nov 09, 2018 at 11:56:06AM +1300, Chris Packham wrote: > With the addition of the invert-pwm property the adt7475 needs its own > binding documentation rather being captured under trivial-devices.txt. > > Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> > --- > Changes in v2: > - use pwm-polarity attiribute to indicate normal or inverted polarity. > > .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ > .../devicetree/bindings/trivial-devices.txt | 4 ---- > 2 files changed, 24 insertions(+), 4 deletions(-) > create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt > > diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt > new file mode 100644 > index 000000000000..d9212b5e9036 > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt > @@ -0,0 +1,24 @@ > +*ADT7475 hwmon sensor. > + > +Required properties: > +- compatible: One of > + "adi,adt7473" > + "adi,adt7475" > + "adi,adt7476" > + "adi,adt7490" > + > +- reg: I2C address > + > +optional properties: > + > +- pwm-polarity: This configures the polarity of the PWM. 0 > + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 > + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. So we're using part of the PWM binding, but none of the rest of it? What is the PWM connection here? It sounds like this is common for sensors, so this should be documented somewhere common. Rob ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-17 15:29 ` Rob Herring @ 2018-11-18 22:56 ` Guenter Roeck 2018-11-19 21:40 ` Rob Herring 0 siblings, 1 reply; 8+ messages in thread From: Guenter Roeck @ 2018-11-18 22:56 UTC (permalink / raw) To: Rob Herring, Chris Packham Cc: jdelvare, linux-hwmon, devicetree, linux-kernel, Mark Rutland On 11/17/18 7:29 AM, Rob Herring wrote: > On Fri, Nov 09, 2018 at 11:56:06AM +1300, Chris Packham wrote: >> With the addition of the invert-pwm property the adt7475 needs its own >> binding documentation rather being captured under trivial-devices.txt. >> >> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> >> --- >> Changes in v2: >> - use pwm-polarity attiribute to indicate normal or inverted polarity. >> >> .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ >> .../devicetree/bindings/trivial-devices.txt | 4 ---- >> 2 files changed, 24 insertions(+), 4 deletions(-) >> create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt >> >> diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt >> new file mode 100644 >> index 000000000000..d9212b5e9036 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt >> @@ -0,0 +1,24 @@ >> +*ADT7475 hwmon sensor. >> + >> +Required properties: >> +- compatible: One of >> + "adi,adt7473" >> + "adi,adt7475" >> + "adi,adt7476" >> + "adi,adt7490" >> + >> +- reg: I2C address >> + >> +optional properties: >> + >> +- pwm-polarity: This configures the polarity of the PWM. 0 >> + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 >> + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. > > So we're using part of the PWM binding, but none of the rest of it? What > is the PWM connection here? > The chip has a built-in PWM controller to control fan speeds. PWM frequency as well as PWM polarity are configurable. I had suggested to use the terminology from Documentation/devicetree/bindings/pwm/pwm.txt. Other than terminology there is no connection to a standard pwm controller. Another option/possibility would be to use a boolean, such as pwm-polarity-inverted. We are open to suggestions. > It sounds like this is common for sensors, so this should be documented > somewhere common. > Sure, no problem. Any suggestion where ? Thanks, Guenter ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-18 22:56 ` Guenter Roeck @ 2018-11-19 21:40 ` Rob Herring 2018-11-19 21:55 ` Chris Packham 0 siblings, 1 reply; 8+ messages in thread From: Rob Herring @ 2018-11-19 21:40 UTC (permalink / raw) To: Guenter Roeck Cc: Chris Packham, Jean Delvare, Linux HWMON List, devicetree, linux-kernel, Mark Rutland On Sun, Nov 18, 2018 at 4:56 PM Guenter Roeck <linux@roeck-us.net> wrote: > > On 11/17/18 7:29 AM, Rob Herring wrote: > > On Fri, Nov 09, 2018 at 11:56:06AM +1300, Chris Packham wrote: > >> With the addition of the invert-pwm property the adt7475 needs its own > >> binding documentation rather being captured under trivial-devices.txt. > >> > >> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> > >> --- > >> Changes in v2: > >> - use pwm-polarity attiribute to indicate normal or inverted polarity. > >> > >> .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ > >> .../devicetree/bindings/trivial-devices.txt | 4 ---- > >> 2 files changed, 24 insertions(+), 4 deletions(-) > >> create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt > >> > >> diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt > >> new file mode 100644 > >> index 000000000000..d9212b5e9036 > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt > >> @@ -0,0 +1,24 @@ > >> +*ADT7475 hwmon sensor. > >> + > >> +Required properties: > >> +- compatible: One of > >> + "adi,adt7473" > >> + "adi,adt7475" > >> + "adi,adt7476" > >> + "adi,adt7490" > >> + > >> +- reg: I2C address > >> + > >> +optional properties: > >> + > >> +- pwm-polarity: This configures the polarity of the PWM. 0 > >> + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 > >> + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. > > > > So we're using part of the PWM binding, but none of the rest of it? What > > is the PWM connection here? > > The chip has a built-in PWM controller to control fan speeds. PWM frequency > as well as PWM polarity are configurable. I had suggested to use the terminology > from Documentation/devicetree/bindings/pwm/pwm.txt. Other than terminology there > is no connection to a standard pwm controller. Ah, a fan controller. Please make that clear. The fan related bindings need a bit of work IMO. We have the start of something somewhat common with aspeed and npcm bindings, but they could use a bit more work. We need the fan and controller bindings to be somewhat separate where a fan node for a given type of fan doesn't depend on the controller node. AIUI, all fans are not the same, so does this controller only work with 1 type of fan and not need any more board level config? Isn't fan speed not linear with PWM duty cycle and need some sort of map. > Another option/possibility would be to use a boolean, such as pwm-polarity-inverted. > We are open to suggestions. > > > It sounds like this is common for sensors, so this should be documented > > somewhere common. > > > Sure, no problem. Any suggestion where ? hwmon/fan.txt (that doesn't exist yet.) Probably all of bindings/hwmon/ should be split up by class of device. Rob ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 2018-11-19 21:40 ` Rob Herring @ 2018-11-19 21:55 ` Chris Packham 0 siblings, 0 replies; 8+ messages in thread From: Chris Packham @ 2018-11-19 21:55 UTC (permalink / raw) To: Rob Herring, Guenter Roeck Cc: Jean Delvare, Linux HWMON List, devicetree, linux-kernel, Mark Rutland On 20/11/18 10:40 AM, Rob Herring wrote: > On Sun, Nov 18, 2018 at 4:56 PM Guenter Roeck <linux@roeck-us.net> wrote: >> >> On 11/17/18 7:29 AM, Rob Herring wrote: >>> On Fri, Nov 09, 2018 at 11:56:06AM +1300, Chris Packham wrote: >>>> With the addition of the invert-pwm property the adt7475 needs its own >>>> binding documentation rather being captured under trivial-devices.txt. >>>> >>>> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> >>>> --- >>>> Changes in v2: >>>> - use pwm-polarity attiribute to indicate normal or inverted polarity. >>>> >>>> .../devicetree/bindings/hwmon/adt7475.txt | 24 +++++++++++++++++++ >>>> .../devicetree/bindings/trivial-devices.txt | 4 ---- >>>> 2 files changed, 24 insertions(+), 4 deletions(-) >>>> create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt >>>> >>>> diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt >>>> new file mode 100644 >>>> index 000000000000..d9212b5e9036 >>>> --- /dev/null >>>> +++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt >>>> @@ -0,0 +1,24 @@ >>>> +*ADT7475 hwmon sensor. >>>> + >>>> +Required properties: >>>> +- compatible: One of >>>> + "adi,adt7473" >>>> + "adi,adt7475" >>>> + "adi,adt7476" >>>> + "adi,adt7490" >>>> + >>>> +- reg: I2C address >>>> + >>>> +optional properties: >>>> + >>>> +- pwm-polarity: This configures the polarity of the PWM. 0 >>>> + (PWM_POLARITY_NORMAL) uses logic high for 100% duty cycle. 1 >>>> + (PWM_POLARITY_INVERSED) uses logic low for 100% duty cycle. >>> >>> So we're using part of the PWM binding, but none of the rest of it? What >>> is the PWM connection here? >>> The chip has a built-in PWM controller to control fan speeds. PWM frequency >> as well as PWM polarity are configurable. I had suggested to use the terminology >> from Documentation/devicetree/bindings/pwm/pwm.txt. Other than terminology there >> is no connection to a standard pwm controller. > > Ah, a fan controller. Please make that clear. > > The fan related bindings need a bit of work IMO. We have the start of > something somewhat common with aspeed and npcm bindings, but they > could use a bit more work. We need the fan and controller bindings to > be somewhat separate where a fan node for a given type of fan doesn't > depend on the controller node. > > AIUI, all fans are not the same, so does this controller only work > with 1 type of fan and not need any more board level config? Isn't fan > speed not linear with PWM duty cycle and need some sort of map. That level of configuration is done in userland via the sysfs API (e.g lm-sensors). I could have added the pwm output inversion via sysfs but I erred on the side of the polarity being an artifact of the hardware design that is fairly static. Things like what thresholds to configure and whether to use automatic pwm control tend to be much more fluid. Then theres pathological cases where other external factors need to be included in the fan control (my particular use case is a network switch acting as a PoE PSE so I not only need to take into account the ambient temperature but how much PoE power is being delivered to connected PDs), >> Another option/possibility would be to use a boolean, such as pwm-polarity-inverted. >> We are open to suggestions. >> >>> It sounds like this is common for sensors, so this should be documented >>> somewhere common. >>> >> Sure, no problem. Any suggestion where ? > > hwmon/fan.txt (that doesn't exist yet.) > > Probably all of bindings/hwmon/ should be split up by class of device. Most of the hwmon chips I've been dealing with lately tend to be multi function (e.g. temperature, voltage, fan tach and fan control). The single function devices tend to land in trivial-devices.txt because there's not much to document other than the compatible string. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 2/2] hwmon: (adt7475): add support for inverting the pwm output 2018-11-08 22:56 [PATCH v2 0/2] hwmon: (adt7475): inverted PWM output Chris Packham 2018-11-08 22:56 ` [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 Chris Packham @ 2018-11-08 22:56 ` Chris Packham 1 sibling, 0 replies; 8+ messages in thread From: Chris Packham @ 2018-11-08 22:56 UTC (permalink / raw) To: linux, robh+dt, jdelvare Cc: linux-hwmon, devicetree, linux-kernel, Chris Packham Add a "invert-pwm" device-tree property to allow hardware designs to use inverted logic on the PWM output. We intentionally preserve the invert PWM output bit if the property is not found to allow for bootloaders/bios which may have configured this earlier. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> --- Changes in v2: - use "pwm-polarity" and support setting both logic high and logic low drivers/hwmon/adt7475.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c index f4c7516eb989..ce2c7d6493c0 100644 --- a/drivers/hwmon/adt7475.c +++ b/drivers/hwmon/adt7475.c @@ -23,6 +23,7 @@ #include <linux/err.h> #include <linux/jiffies.h> #include <linux/util_macros.h> +#include <linux/pwm.h> /* Indexes for the sysfs hooks */ @@ -1536,6 +1537,23 @@ static int adt7475_update_limits(struct i2c_client *client) return 0; } +static int adt7475_set_pwm_polarity(struct i2c_client *client, int index, + enum pwm_polarity pol) +{ + int ret; + + ret = adt7475_read(PWM_CONFIG_REG(index)); + if (ret < 0) + return ret; + + if (pol == PWM_POLARITY_INVERSED) + ret |= BIT(4); + else + ret &= ~BIT(4); + + return i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), ret); +} + static int adt7475_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1638,6 +1656,16 @@ static int adt7475_probe(struct i2c_client *client, for (i = 0; i < ADT7475_PWM_COUNT; i++) adt7475_read_pwm(client, i); + if (client->dev.of_node) { + enum pwm_polarity polarity; + + ret = of_property_read_u32(client->dev.of_node, "pwm-polarity", + &polarity); + if (!ret) + for (i = 0; i < ADT7475_PWM_COUNT; i++) + adt7475_set_pwm_polarity(client, i, polarity); + } + /* Start monitoring */ switch (chip) { case adt7475: -- 2.19.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
end of thread, other threads:[~2018-11-19 21:55 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2018-11-08 22:56 [PATCH v2 0/2] hwmon: (adt7475): inverted PWM output Chris Packham 2018-11-08 22:56 ` [PATCH v2 1/2] dt-bindings: hwmon: add binding documentation for adt7475 Chris Packham 2018-11-12 0:34 ` Chris Packham 2018-11-17 15:29 ` Rob Herring 2018-11-18 22:56 ` Guenter Roeck 2018-11-19 21:40 ` Rob Herring 2018-11-19 21:55 ` Chris Packham 2018-11-08 22:56 ` [PATCH v2 2/2] hwmon: (adt7475): add support for inverting the pwm output Chris Packham
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).