* [PATCH v2 0/2] hwmon (ina3221) Add single-shot mode support @ 2019-01-05 3:06 Nicolin Chen 2019-01-05 3:06 ` [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property Nicolin Chen 2019-01-05 3:06 ` [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property Nicolin Chen 0 siblings, 2 replies; 8+ messages in thread From: Nicolin Chen @ 2019-01-05 3:06 UTC (permalink / raw) To: jdelvare, linux, robh+dt, mark.rutland Cc: linux-hwmon, devicetree, linux-kernel By default, ina3221, as a hardware monitor, continuously measures the inputs and generates corresponding data. However, for battery powered devices, this mode might be power consuming. This series of patches add a feature of changing default operating mode to its single-shot mode via DT. Changelog v1->v2: * Cleaned-up PATCH-2 Nicolin Chen (2): dt-bindings: hwmon: ina3221: Add ti,single-shot property hwmon: (ina3221) Implement ti,single-shot DT property .../devicetree/bindings/hwmon/ina3221.txt | 10 ++++++++++ drivers/hwmon/ina3221.c | 20 +++++++++++++++++++ 2 files changed, 30 insertions(+) -- 2.17.1 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property 2019-01-05 3:06 [PATCH v2 0/2] hwmon (ina3221) Add single-shot mode support Nicolin Chen @ 2019-01-05 3:06 ` Nicolin Chen 2019-01-11 21:34 ` Rob Herring 2019-01-05 3:06 ` [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property Nicolin Chen 1 sibling, 1 reply; 8+ messages in thread From: Nicolin Chen @ 2019-01-05 3:06 UTC (permalink / raw) To: jdelvare, linux, robh+dt, mark.rutland Cc: linux-hwmon, devicetree, linux-kernel By default, ina3221, as a hardware monitor, continuously measures the inputs and generates corresponding data. However, for battery powered devices, this mode might be power consuming. This patch adds a "ti,single-shot" property to allow changing the default continuous mode to single-shot operating mode. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> --- Documentation/devicetree/bindings/hwmon/ina3221.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/ina3221.txt b/Documentation/devicetree/bindings/hwmon/ina3221.txt index a7b25caa2b8e..fa63b6171407 100644 --- a/Documentation/devicetree/bindings/hwmon/ina3221.txt +++ b/Documentation/devicetree/bindings/hwmon/ina3221.txt @@ -6,6 +6,16 @@ Texas Instruments INA3221 Device Tree Bindings - reg: I2C address Optional properties: + - ti,single-shot: This chip has two power modes: single-shot (chip takes one + measurement and then shuts itself down) and continuous ( + chip takes continuous measurements). The continuous mode is + more reliable and suitable for hardware monitor type device, + but the single-shot mode is more power-friendly and useful + for battery-powered device which cares power consumptions + while still needs some measurements occasionally. + If this property is present, the single-shot mode will be + used, instead of the default continuous one for monitoring. + = The node contains optional child nodes for three channels = = Each child node describes the information of input source = -- 2.17.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property 2019-01-05 3:06 ` [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property Nicolin Chen @ 2019-01-11 21:34 ` Rob Herring 0 siblings, 0 replies; 8+ messages in thread From: Rob Herring @ 2019-01-11 21:34 UTC (permalink / raw) To: Nicolin Chen Cc: jdelvare, linux, robh+dt, mark.rutland, linux-hwmon, devicetree, linux-kernel On Fri, 4 Jan 2019 19:06:35 -0800, Nicolin Chen wrote: > By default, ina3221, as a hardware monitor, continuously measures > the inputs and generates corresponding data. However, for battery > powered devices, this mode might be power consuming. > > This patch adds a "ti,single-shot" property to allow changing the > default continuous mode to single-shot operating mode. > > Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> > --- > Documentation/devicetree/bindings/hwmon/ina3221.txt | 10 ++++++++++ > 1 file changed, 10 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property 2019-01-05 3:06 [PATCH v2 0/2] hwmon (ina3221) Add single-shot mode support Nicolin Chen 2019-01-05 3:06 ` [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property Nicolin Chen @ 2019-01-05 3:06 ` Nicolin Chen 2019-01-07 19:35 ` Guenter Roeck 1 sibling, 1 reply; 8+ messages in thread From: Nicolin Chen @ 2019-01-05 3:06 UTC (permalink / raw) To: jdelvare, linux, robh+dt, mark.rutland Cc: linux-hwmon, devicetree, linux-kernel By default, ina3221, as a hardware monitor, continuously measures the inputs and generates corresponding data. However, for battery powered devices, this mode might be power consuming. The DT binding doc is updated with a new boolean type property to allow changing the default operating mode from consuming mode to single-shot mode, which will measure input on demand and then shut down to save power. So this patch implements the DT property accordingly. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> --- Changelog v1->v2: * Replaced the useless mode defines with a boolean variable. drivers/hwmon/ina3221.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c index e90ccac8bebb..4258a6ebe195 100644 --- a/drivers/hwmon/ina3221.c +++ b/drivers/hwmon/ina3221.c @@ -111,6 +111,7 @@ struct ina3221_input { * @inputs: Array of channel input source specific structures * @lock: mutex lock to serialize sysfs attribute accesses * @reg_config: Register value of INA3221_CONFIG + * @single_shot: running in single-shot operating mode */ struct ina3221_data { struct device *pm_dev; @@ -119,6 +120,8 @@ struct ina3221_data { struct ina3221_input inputs[INA3221_NUM_CHANNELS]; struct mutex lock; u32 reg_config; + + bool single_shot; }; static inline bool ina3221_is_enabled(struct ina3221_data *ina, int channel) @@ -188,6 +191,11 @@ static int ina3221_read_in(struct device *dev, u32 attr, int channel, long *val) if (!ina3221_is_enabled(ina, channel)) return -ENODATA; + /* Write CONFIG register to trigger a single-shot measurement */ + if (ina->single_shot) + regmap_write(ina->regmap, INA3221_CONFIG, + ina->reg_config); + ret = ina3221_wait_for_data(ina); if (ret) return ret; @@ -232,6 +240,11 @@ static int ina3221_read_curr(struct device *dev, u32 attr, if (!ina3221_is_enabled(ina, channel)) return -ENODATA; + /* Write CONFIG register to trigger a single-shot measurement */ + if (ina->single_shot) + regmap_write(ina->regmap, INA3221_CONFIG, + ina->reg_config); + ret = ina3221_wait_for_data(ina); if (ret) return ret; @@ -617,6 +630,9 @@ static int ina3221_probe_from_dt(struct device *dev, struct ina3221_data *ina) if (!np) return 0; + if (of_property_read_bool(np, "ti,single-shot")) + ina->single_shot = true; + for_each_child_of_node(np, child) { ret = ina3221_probe_child_from_dt(dev, child, ina); if (ret) @@ -666,6 +682,10 @@ static int ina3221_probe(struct i2c_client *client, /* The driver will be reset, so use reset value */ ina->reg_config = INA3221_CONFIG_DEFAULT; + /* Clear continuous bit to use single-shot mode */ + if (ina->single_shot) + ina->reg_config &= ~INA3221_CONFIG_MODE_CONTINUOUS; + /* Disable channels if their inputs are disconnected */ for (i = 0; i < INA3221_NUM_CHANNELS; i++) { if (ina->inputs[i].disconnected) -- 2.17.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property 2019-01-05 3:06 ` [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property Nicolin Chen @ 2019-01-07 19:35 ` Guenter Roeck 2019-01-17 22:30 ` Nicolin Chen 0 siblings, 1 reply; 8+ messages in thread From: Guenter Roeck @ 2019-01-07 19:35 UTC (permalink / raw) To: Nicolin Chen Cc: jdelvare, robh+dt, mark.rutland, linux-hwmon, devicetree, linux-kernel On Fri, Jan 04, 2019 at 07:06:36PM -0800, Nicolin Chen wrote: > By default, ina3221, as a hardware monitor, continuously measures > the inputs and generates corresponding data. However, for battery > powered devices, this mode might be power consuming. > > The DT binding doc is updated with a new boolean type property to > allow changing the default operating mode from consuming mode to > single-shot mode, which will measure input on demand and then shut > down to save power. > > So this patch implements the DT property accordingly. > > Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> > --- > Changelog > v1->v2: > * Replaced the useless mode defines with a boolean variable. > > drivers/hwmon/ina3221.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c > index e90ccac8bebb..4258a6ebe195 100644 > --- a/drivers/hwmon/ina3221.c > +++ b/drivers/hwmon/ina3221.c > @@ -111,6 +111,7 @@ struct ina3221_input { > * @inputs: Array of channel input source specific structures > * @lock: mutex lock to serialize sysfs attribute accesses > * @reg_config: Register value of INA3221_CONFIG > + * @single_shot: running in single-shot operating mode > */ > struct ina3221_data { > struct device *pm_dev; > @@ -119,6 +120,8 @@ struct ina3221_data { > struct ina3221_input inputs[INA3221_NUM_CHANNELS]; > struct mutex lock; > u32 reg_config; > + > + bool single_shot; > }; > > static inline bool ina3221_is_enabled(struct ina3221_data *ina, int channel) > @@ -188,6 +191,11 @@ static int ina3221_read_in(struct device *dev, u32 attr, int channel, long *val) > if (!ina3221_is_enabled(ina, channel)) > return -ENODATA; > > + /* Write CONFIG register to trigger a single-shot measurement */ > + if (ina->single_shot) > + regmap_write(ina->regmap, INA3221_CONFIG, > + ina->reg_config); > + > ret = ina3221_wait_for_data(ina); > if (ret) > return ret; > @@ -232,6 +240,11 @@ static int ina3221_read_curr(struct device *dev, u32 attr, > if (!ina3221_is_enabled(ina, channel)) > return -ENODATA; > > + /* Write CONFIG register to trigger a single-shot measurement */ > + if (ina->single_shot) > + regmap_write(ina->regmap, INA3221_CONFIG, > + ina->reg_config); > + > ret = ina3221_wait_for_data(ina); > if (ret) > return ret; > @@ -617,6 +630,9 @@ static int ina3221_probe_from_dt(struct device *dev, struct ina3221_data *ina) > if (!np) > return 0; > > + if (of_property_read_bool(np, "ti,single-shot")) > + ina->single_shot = true; > + ina->single_shot = of_property_read_bool(np, "ti,single-shot"); No need to resend right now; let's wait for feedback from Rob. Guenter > for_each_child_of_node(np, child) { > ret = ina3221_probe_child_from_dt(dev, child, ina); > if (ret) > @@ -666,6 +682,10 @@ static int ina3221_probe(struct i2c_client *client, > /* The driver will be reset, so use reset value */ > ina->reg_config = INA3221_CONFIG_DEFAULT; > > + /* Clear continuous bit to use single-shot mode */ > + if (ina->single_shot) > + ina->reg_config &= ~INA3221_CONFIG_MODE_CONTINUOUS; > + > /* Disable channels if their inputs are disconnected */ > for (i = 0; i < INA3221_NUM_CHANNELS; i++) { > if (ina->inputs[i].disconnected) ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property 2019-01-07 19:35 ` Guenter Roeck @ 2019-01-17 22:30 ` Nicolin Chen 2019-01-17 22:58 ` Guenter Roeck 0 siblings, 1 reply; 8+ messages in thread From: Nicolin Chen @ 2019-01-17 22:30 UTC (permalink / raw) To: Guenter Roeck Cc: jdelvare, robh+dt, mark.rutland, linux-hwmon, devicetree, linux-kernel On Mon, Jan 07, 2019 at 11:35:55AM -0800, Guenter Roeck wrote: > > + if (of_property_read_bool(np, "ti,single-shot")) > > + ina->single_shot = true; > > + > ina->single_shot = of_property_read_bool(np, "ti,single-shot"); > > No need to resend right now; let's wait for feedback from Rob. Looks like Rob has acked. Is this resend version fine for review? Thank you Nicolin ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property 2019-01-17 22:30 ` Nicolin Chen @ 2019-01-17 22:58 ` Guenter Roeck 2019-01-17 23:02 ` Nicolin Chen 0 siblings, 1 reply; 8+ messages in thread From: Guenter Roeck @ 2019-01-17 22:58 UTC (permalink / raw) To: Nicolin Chen Cc: jdelvare, robh+dt, mark.rutland, linux-hwmon, devicetree, linux-kernel On Thu, Jan 17, 2019 at 02:30:13PM -0800, Nicolin Chen wrote: > On Mon, Jan 07, 2019 at 11:35:55AM -0800, Guenter Roeck wrote: > > > > + if (of_property_read_bool(np, "ti,single-shot")) > > > + ina->single_shot = true; > > > + > > ina->single_shot = of_property_read_bool(np, "ti,single-shot"); > > > > No need to resend right now; let's wait for feedback from Rob. > > Looks like Rob has acked. Is this resend version fine for review? > "Right now" was supposed to mean that you should wait for Rob's feedback before sending v3 with the feedback above applied. Did you send that version ? I don't see it in patchwork, nor in my inbox. Thanks, Guenter ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property 2019-01-17 22:58 ` Guenter Roeck @ 2019-01-17 23:02 ` Nicolin Chen 0 siblings, 0 replies; 8+ messages in thread From: Nicolin Chen @ 2019-01-17 23:02 UTC (permalink / raw) To: Guenter Roeck Cc: jdelvare, robh+dt, mark.rutland, linux-hwmon, devicetree, linux-kernel On Thu, Jan 17, 2019 at 02:58:42PM -0800, Guenter Roeck wrote: > "Right now" was supposed to mean that you should wait for Rob's > feedback before sending v3 with the feedback above applied. > Did you send that version ? I don't see it in patchwork, nor > in my inbox. Oh, sorry. Will resend it. Thanks for the reply. ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-01-17 23:02 UTC | newest] Thread overview: 8+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2019-01-05 3:06 [PATCH v2 0/2] hwmon (ina3221) Add single-shot mode support Nicolin Chen 2019-01-05 3:06 ` [PATCH v2 1/2] dt-bindings: hwmon: ina3221: Add ti,single-shot property Nicolin Chen 2019-01-11 21:34 ` Rob Herring 2019-01-05 3:06 ` [PATCH v2 2/2] hwmon: (ina3221) Implement ti,single-shot DT property Nicolin Chen 2019-01-07 19:35 ` Guenter Roeck 2019-01-17 22:30 ` Nicolin Chen 2019-01-17 22:58 ` Guenter Roeck 2019-01-17 23:02 ` Nicolin Chen
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