| Message ID | 1442612399-341-2-git-send-email-dannenberg@ti.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hi, On Fri, Sep 18, 2015 at 04:39:49PM -0500, Andreas Dannenberg wrote: > Extend the bq24257 charger's device tree documentation to cover the > bq24250 and bq24251 devices as well feature additions. The binding looks fine to except for: > +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can > + also be defined through the standard interrupt definition properties (see > + optional properties section below). Only use one method. Why do you expose two ways for this? -- Sebastian
On Tue, Sep 22, 2015 at 06:24:48PM +0200, Sebastian Reichel wrote: > Hi, > > On Fri, Sep 18, 2015 at 04:39:49PM -0500, Andreas Dannenberg wrote: > > Extend the bq24257 charger's device tree documentation to cover the > > bq24250 and bq24251 devices as well feature additions. > > The binding looks fine to except for: > > > +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can > > + also be defined through the standard interrupt definition properties (see > > + optional properties section below). Only use one method. > > Why do you expose two ways for this? Hi Sebastian. The original driver exposed this - it just didn't document it in the DT binding doc. I'm not sure why this was introduced in the first place (Laurentiu?). I know we can't change the API but since it was never documented maybe we can remove it? Regards, -- Andreas Dannenberg Texas Instruments Inc > > -- Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Tue, Sep 22, 2015 at 04:58:24PM -0500, Andreas Dannenberg wrote: > On Tue, Sep 22, 2015 at 06:24:48PM +0200, Sebastian Reichel wrote: > > On Fri, Sep 18, 2015 at 04:39:49PM -0500, Andreas Dannenberg wrote: > > > Extend the bq24257 charger's device tree documentation to cover the > > > bq24250 and bq24251 devices as well feature additions. > > > > The binding looks fine to except for: > > > > > +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can > > > + also be defined through the standard interrupt definition properties (see > > > + optional properties section below). Only use one method. > > > > Why do you expose two ways for this? > > Hi Sebastian. The original driver exposed this - it just didn't > document it in the DT binding doc. I'm not sure why this was introduced > in the first place (Laurentiu?). I know we can't change the API but > since it was never documented maybe we can remove it? It seems this is neither documented, nor used. So I guess it can be removed. Let's wait for feedback from Laurentiu, though. -- Sebastian
Hi, On Wed, Sep 23, 2015 at 02:34:15AM +0200, Sebastian Reichel wrote: > Hi, > > On Tue, Sep 22, 2015 at 04:58:24PM -0500, Andreas Dannenberg wrote: > > On Tue, Sep 22, 2015 at 06:24:48PM +0200, Sebastian Reichel wrote: > > > On Fri, Sep 18, 2015 at 04:39:49PM -0500, Andreas Dannenberg wrote: > > > > Extend the bq24257 charger's device tree documentation to cover the > > > > bq24250 and bq24251 devices as well feature additions. > > > > > > The binding looks fine to except for: > > > > > > > +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can > > > > + also be defined through the standard interrupt definition properties (see > > > > + optional properties section below). Only use one method. > > > > > > Why do you expose two ways for this? > > > > Hi Sebastian. The original driver exposed this - it just didn't > > document it in the DT binding doc. I'm not sure why this was introduced > > in the first place (Laurentiu?). I know we can't change the API but > > since it was never documented maybe we can remove it? > > It seems this is neither documented, nor used. So I guess it can be > removed. Let's wait for feedback from Laurentiu, though. This was needed to have both ACPI and DT enumeration work. At the time I wrote the driver, GpioInt resources in ACPI were not passed to the driver in client->irq, as opposed to DT enumeration. However, conveniently enough, the patch below landed in master by the same time bq24257 driver went in. So, I believe it should be safe now to remove the stat-gpio probing. commit 845c877009cf014b971aab7f54613f9185a824b0 Author: Mika Westerberg <mika.westerberg@linux.intel.com> Date: Wed May 6 13:29:08 2015 +0300 i2c / ACPI: Assign IRQ for devices that have GpioInt automatically laurentiu -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Sep 23, 2015 at 11:14:56AM +0300, Laurentiu Palcu wrote: > Hi, > > On Wed, Sep 23, 2015 at 02:34:15AM +0200, Sebastian Reichel wrote: > > Hi, > > > > On Tue, Sep 22, 2015 at 04:58:24PM -0500, Andreas Dannenberg wrote: > > > On Tue, Sep 22, 2015 at 06:24:48PM +0200, Sebastian Reichel wrote: > > > > On Fri, Sep 18, 2015 at 04:39:49PM -0500, Andreas Dannenberg wrote: > > > > > Extend the bq24257 charger's device tree documentation to cover the > > > > > bq24250 and bq24251 devices as well feature additions. > > > > > > > > The binding looks fine to except for: > > > > > > > > > +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can > > > > > + also be defined through the standard interrupt definition properties (see > > > > > + optional properties section below). Only use one method. > > > > > > > > Why do you expose two ways for this? > > > > > > Hi Sebastian. The original driver exposed this - it just didn't > > > document it in the DT binding doc. I'm not sure why this was introduced > > > in the first place (Laurentiu?). I know we can't change the API but > > > since it was never documented maybe we can remove it? > > > > It seems this is neither documented, nor used. So I guess it can be > > removed. Let's wait for feedback from Laurentiu, though. > This was needed to have both ACPI and DT enumeration work. At the time I > wrote the driver, GpioInt resources in ACPI were not passed to the > driver in client->irq, as opposed to DT enumeration. > > However, conveniently enough, the patch below landed in master by the > same time bq24257 driver went in. So, I believe it should be safe now to > remove the stat-gpio probing. > > commit 845c877009cf014b971aab7f54613f9185a824b0 > Author: Mika Westerberg <mika.westerberg@linux.intel.com> > Date: Wed May 6 13:29:08 2015 +0300 > > i2c / ACPI: Assign IRQ for devices that have GpioInt automatically > Thanks for the background! I'll be happy to simplify this as part of my patch series. -- Andreas Dannenberg Texas Instruments Inc -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/power/bq24257.txt b/Documentation/devicetree/bindings/power/bq24257.txt index 5c9d394..3815897 100644 --- a/Documentation/devicetree/bindings/power/bq24257.txt +++ b/Documentation/devicetree/bindings/power/bq24257.txt @@ -1,21 +1,66 @@ -Binding for TI bq24257 Li-Ion Charger +Binding for TI bq24250/bq24251/bq24257 Li-Ion Charger Required properties: - compatible: Should contain one of the following: + * "ti,bq24250" + * "ti,bq24251" * "ti,bq24257" -- reg: integer, i2c address of the device. +- reg: integer, i2c address of the device. +- stat-gpios: GPIO used for the devices STAT_IN pin. Alternatively the pin can + also be defined through the standard interrupt definition properties (see + optional properties section below). Only use one method. - ti,battery-regulation-voltage: integer, maximum charging voltage in uV. -- ti,charge-current: integer, maximum charging current in uA. -- ti,termination-current: integer, charge will be terminated when current in - constant-voltage phase drops below this value (in uA). +- ti,charge-current: integer, maximum charging current in uA. +- ti,termination-current: integer, charge will be terminated when current in + constant-voltage phase drops below this value (in uA). + +Optional properties: +- pg-gpios: GPIO used for connecting the bq2425x device PG (Power Good) pin. + This pin is not available on all devices however it should be used if + possible as this is the recommended way to obtain the charger's input PG + state. If this pin is not specified a software-based approach for PG + detection is used. +- ti,current-limit: The maximum current to be drawn from the charger's input + (in uA). If this property is not specified a USB D+/D- signal based charger + type detection is used (if available) and the input limit current is set + accordingly. If the D+/D- based detection is not available on a given device + a default of 500,000 is used (=500mA). +- ti,ovp-voltage: Configures the over voltage protection voltage (in uV). If + not specified a default of 6,5000,000 (=6.5V) is used. +- ti,in-dpm-voltage: Configures the threshold input voltage for the dynamic + power path management (in uV). If not specified a default of 4,360,000 + (=4.36V) is used. +- interrupt-parent: Should be the phandle for the interrupt controller. Use in + conjunction with "interrupts" and only in case "stat-gpios" is not used. +- interrupts: Interrupt mapping for GPIO IRQ (configure for both edges). Use in + conjunction with "interrupt-parent" and only in case "stat-gpios" is not + used. Example: bq24257 { compatible = "ti,bq24257"; reg = <0x6a>; + stat-gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>; + pg-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>; ti,battery-regulation-voltage = <4200000>; ti,charge-current = <1000000>; ti,termination-current = <50000>; }; + +Example: + +bq24250 { + compatible = "ti,bq24250"; + reg = <0x6a>; + interrupt-parent = <&gpio1>; + interrupts = <16 IRQ_TYPE_EDGE_BOTH>; + + ti,battery-regulation-voltage = <4200000>; + ti,charge-current = <500000>; + ti,termination-current = <50000>; + ti,current-limit = <900000>; + ti,ovp-voltage = <9500000>; + ti,in-dpm-voltage = <4440000>; +};
Extend the bq24257 charger's device tree documentation to cover the bq24250 and bq24251 devices as well feature additions. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> --- .../devicetree/bindings/power/bq24257.txt | 55 ++++++++++++++++++++-- 1 file changed, 50 insertions(+), 5 deletions(-)