diff mbox

twl4030_charger: add devicetree support.

Message ID 20131024165005.78bc8740@notabene.brown (mailing list archive)
State New, archived
Headers show

Commit Message

NeilBrown Oct. 24, 2013, 5:50 a.m. UTC 
[my first device-tree related patch.  Please let me know what I got wrong so
I wont repeat the mistake in all the others I have queued]

This allows the charger to be enabled with devicetree, and
allows the parameters for charging the backup battery to be set.

Signed-off-by: NeilBrown <neilb@suse.de>

Comments

Kumar Gala Oct. 24, 2013, 9:44 a.m. UTC | #1 
On Oct 24, 2013, at 12:50 AM, NeilBrown wrote:

> 
> [my first device-tree related patch.  Please let me know what I got wrong so
> I wont repeat the mistake in all the others I have queued]
> 
> This allows the charger to be enabled with devicetree, and
> allows the parameters for charging the backup battery to be set.
> 
> Signed-off-by: NeilBrown <neilb@suse.de>
> 
> diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
> new file mode 100644
> index 0000000..8afaa9a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/twl-charger.txt
> @@ -0,0 +1,20 @@
> +TWL BCI (Battery Charger Interface)
> +
> +Required properties:
> +- compatible:
> +  - "ti,twl4030-bci"
> +- interrupts: two interrupt lines from the TWL SIH (secondary
> +  interrupt handler) - interrupts 9 and 2.
> +
> +Optional properties:
> +- bb-uvolt: microvolts for charging the backup battery.
> +- bb-uamp: microamps for charging the backup battery.

prop should have vendor prefix.

ti,bb-uvolt, ti,bb-uamp

- k

> +
> +Examples:
> +
> +bci {
> +   compatible = "ti,twl4030-bci";
> +   interrupts = <9>, <2>;
> +   bb-uvolt = <3200000>;
> +   bb-uamp = <150>;
> +};
Grant Likely Oct. 24, 2013, 10:06 a.m. UTC | #2 
On Thu, 24 Oct 2013 04:44:03 -0500, Kumar Gala <galak@codeaurora.org> wrote:
> 
> On Oct 24, 2013, at 12:50 AM, NeilBrown wrote:
> 
> > 
> > [my first device-tree related patch.  Please let me know what I got wrong so
> > I wont repeat the mistake in all the others I have queued]
> > 
> > This allows the charger to be enabled with devicetree, and
> > allows the parameters for charging the backup battery to be set.
> > 
> > Signed-off-by: NeilBrown <neilb@suse.de>
> > 
> > diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
> > new file mode 100644
> > index 0000000..8afaa9a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/power/twl-charger.txt
> > @@ -0,0 +1,20 @@
> > +TWL BCI (Battery Charger Interface)
> > +
> > +Required properties:
> > +- compatible:
> > +  - "ti,twl4030-bci"
> > +- interrupts: two interrupt lines from the TWL SIH (secondary
> > +  interrupt handler) - interrupts 9 and 2.
> > +
> > +Optional properties:
> > +- bb-uvolt: microvolts for charging the backup battery.
> > +- bb-uamp: microamps for charging the backup battery.
> 
> prop should have vendor prefix.
> 
> ti,bb-uvolt, ti,bb-uamp

Agreed. Otherwise:

Acked-by: Grant Likely <grant.likely@linaro.org>

> 
> - k
> 
> > +
> > +Examples:
> > +
> > +bci {
> > +   compatible = "ti,twl4030-bci";
> > +   interrupts = <9>, <2>;
> > +   bb-uvolt = <3200000>;
> > +   bb-uamp = <150>;
> > +};
> 
> -- 
> Employee of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
> 

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NeilBrown Oct. 24, 2013, 10:41 a.m. UTC | #3 
On Thu, 24 Oct 2013 11:06:52 +0100 Grant Likely <grant.likely@linaro.org>
wrote:

> On Thu, 24 Oct 2013 04:44:03 -0500, Kumar Gala <galak@codeaurora.org> wrote:
> > 
> > On Oct 24, 2013, at 12:50 AM, NeilBrown wrote:
> > 
> > > 
> > > [my first device-tree related patch.  Please let me know what I got wrong so
> > > I wont repeat the mistake in all the others I have queued]
> > > 
> > > This allows the charger to be enabled with devicetree, and
> > > allows the parameters for charging the backup battery to be set.
> > > 
> > > Signed-off-by: NeilBrown <neilb@suse.de>
> > > 
> > > diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
> > > new file mode 100644
> > > index 0000000..8afaa9a
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/power/twl-charger.txt
> > > @@ -0,0 +1,20 @@
> > > +TWL BCI (Battery Charger Interface)
> > > +
> > > +Required properties:
> > > +- compatible:
> > > +  - "ti,twl4030-bci"
> > > +- interrupts: two interrupt lines from the TWL SIH (secondary
> > > +  interrupt handler) - interrupts 9 and 2.
> > > +
> > > +Optional properties:
> > > +- bb-uvolt: microvolts for charging the backup battery.
> > > +- bb-uamp: microamps for charging the backup battery.
> > 
> > prop should have vendor prefix.
> > 
> > ti,bb-uvolt, ti,bb-uamp
> 
> Agreed. Otherwise:

OK, I'll do that - thanks.

NeilBrown

> 
> Acked-by: Grant Likely <grant.likely@linaro.org>
> 
> > 
> > - k
> > 
> > > +
> > > +Examples:
> > > +
> > > +bci {
> > > +   compatible = "ti,twl4030-bci";
> > > +   interrupts = <9>, <2>;
> > > +   bb-uvolt = <3200000>;
> > > +   bb-uamp = <150>;
> > > +};
> > 
> > -- 
> > Employee of Qualcomm Innovation Center, Inc.
> > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
> >
Kumar Gala Oct. 25, 2013, 3:56 a.m. UTC | #4 
On Oct 24, 2013, at 5:41 AM, NeilBrown wrote:

> On Thu, 24 Oct 2013 11:06:52 +0100 Grant Likely <grant.likely@linaro.org>
> wrote:
> 
>> On Thu, 24 Oct 2013 04:44:03 -0500, Kumar Gala <galak@codeaurora.org> wrote:
>>> 
>>> On Oct 24, 2013, at 12:50 AM, NeilBrown wrote:
>>> 
>>>> 
>>>> [my first device-tree related patch.  Please let me know what I got wrong so
>>>> I wont repeat the mistake in all the others I have queued]
>>>> 
>>>> This allows the charger to be enabled with devicetree, and
>>>> allows the parameters for charging the backup battery to be set.
>>>> 
>>>> Signed-off-by: NeilBrown <neilb@suse.de>
>>>> 
>>>> diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
>>>> new file mode 100644
>>>> index 0000000..8afaa9a
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/power/twl-charger.txt
>>>> @@ -0,0 +1,20 @@
>>>> +TWL BCI (Battery Charger Interface)
>>>> +
>>>> +Required properties:
>>>> +- compatible:
>>>> +  - "ti,twl4030-bci"
>>>> +- interrupts: two interrupt lines from the TWL SIH (secondary
>>>> +  interrupt handler) - interrupts 9 and 2.
>>>> +
>>>> +Optional properties:
>>>> +- bb-uvolt: microvolts for charging the backup battery.
>>>> +- bb-uamp: microamps for charging the backup battery.
>>> 
>>> prop should have vendor prefix.
>>> 
>>> ti,bb-uvolt, ti,bb-uamp
>> 
>> Agreed. Otherwise:
> 
> OK, I'll do that - thanks.
> 
> NeilBrown

Ditto on the Ack once these changes are made:

Acked-by: Kumar Gala <galak@codeaurora.org>

- k

> 
>> 
>> Acked-by: Grant Likely <grant.likely@linaro.org>
>> 
>>> 
>>> - k
>>> 
>>>> +
>>>> +Examples:
>>>> +
>>>> +bci {
>>>> +   compatible = "ti,twl4030-bci";
>>>> +   interrupts = <9>, <2>;
>>>> +   bb-uvolt = <3200000>;
>>>> +   bb-uamp = <150>;
>>>> +};
>>> 
>>> -- 
>>> Employee of Qualcomm Innovation Center, Inc.
>>> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
>>> 
>
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
new file mode 100644
index 0000000..8afaa9a
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/twl-charger.txt
@@ -0,0 +1,20 @@ 
+TWL BCI (Battery Charger Interface)
+
+Required properties:
+- compatible:
+  - "ti,twl4030-bci"
+- interrupts: two interrupt lines from the TWL SIH (secondary
+  interrupt handler) - interrupts 9 and 2.
+
+Optional properties:
+- bb-uvolt: microvolts for charging the backup battery.
+- bb-uamp: microamps for charging the backup battery.
+
+Examples:
+
+bci {
+   compatible = "ti,twl4030-bci";
+   interrupts = <9>, <2>;
+   bb-uvolt = <3200000>;
+   bb-uamp = <150>;
+};
diff --git a/arch/arm/boot/dts/twl4030.dtsi b/arch/arm/boot/dts/twl4030.dtsi
index ae6a17a..5a12540 100644
--- a/arch/arm/boot/dts/twl4030.dtsi
+++ b/arch/arm/boot/dts/twl4030.dtsi
@@ -19,6 +19,12 @@ 
 		interrupts = <11>;
 	};
 
+	charger: bci {
+		compatible = "ti,twl4030-bci";
+		interrupts = <9>, <2>;
+		bci3v1-supply = <&vusb3v1>;
+	};
+
 	watchdog {
 		compatible = "ti,twl4030-wdt";
 	};
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index d98abe9..a06b973 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -495,10 +495,38 @@  static enum power_supply_property twl4030_charger_props[] = {
 	POWER_SUPPLY_PROP_CURRENT_NOW,
 };
 
+#ifdef CONFIG_OF
+static const struct twl4030_bci_platform_data *
+twl4030_bci_parse_dt(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	struct twl4030_bci_platform_data *pdata;
+	u32 num;
+
+	if (!np)
+		return NULL;
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return pdata;
+
+	if (of_property_read_u32(np, "bb-uvolt", &num) == 0)
+		pdata->bb_uvolt = num;
+	if (of_property_read_u32(np, "bb-uamp", &num) == 0)
+		pdata->bb_uamp = num;
+	return pdata;
+}
+#else
+static inline const struct twl4030_bci_platform_data *
+twl4030_bci_parse_dt(struct device *dev)
+{
+	return NULL;
+}
+#endif
+
 static int __init twl4030_bci_probe(struct platform_device *pdev)
 {
 	struct twl4030_bci *bci;
-	struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
+	const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
 	int ret;
 	u32 reg;
 
@@ -506,6 +534,9 @@  static int __init twl4030_bci_probe(struct platform_device *pdev)
 	if (bci == NULL)
 		return -ENOMEM;
 
+	if (!pdata)
+		pdata = twl4030_bci_parse_dt(&pdev->dev);
+
 	bci->dev = &pdev->dev;
 	bci->irq_chg = platform_get_irq(pdev, 0);
 	bci->irq_bci = platform_get_irq(pdev, 1);
@@ -581,8 +612,11 @@  static int __init twl4030_bci_probe(struct platform_device *pdev)
 
 	twl4030_charger_enable_ac(true);
 	twl4030_charger_enable_usb(bci, true);
-	twl4030_charger_enable_backup(pdata->bb_uvolt,
-				      pdata->bb_uamp);
+	if (pdata)
+		twl4030_charger_enable_backup(pdata->bb_uvolt,
+					      pdata->bb_uamp);
+	else
+		twl4030_charger_enable_backup(0, 0);
 
 	return 0;
 
@@ -631,10 +665,17 @@  static int __exit twl4030_bci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id twl_bci_of_match[] = {
+	{.compatible = "ti,twl4030-bci", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, twl_bci_of_match);
+
 static struct platform_driver twl4030_bci_driver = {
 	.driver	= {
 		.name	= "twl4030_bci",
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(twl_bci_of_match),
 	},
 	.remove	= __exit_p(twl4030_bci_remove),
 };