[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@xxxxxxx>
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),
};
Attachment:
signature.asc
Description: PGP signature
