[PATCH 3/4] mfd: ab8500: add devicetree support for charger
Rajanikanth H.V
rajanikanth.hv at stericsson.com
Mon Oct 1 00:08:32 EDT 2012
From: "Rajanikanth H.V" <rajanikanth.hv at stericsson.com>
This patch adds device tree support for charger driver
Signed-off-by: Rajanikanth H.V <rajanikanth.hv at stericsson.com>
---
Documentation/devicetree/bindings/mfd/ab8500.txt | 14 +++++
.../bindings/power_supply/ab8500/charger.txt | 44 ++++++++++++++
arch/arm/boot/dts/dbx5x0.dtsi | 11 ++++
drivers/mfd/ab8500-core.c | 1 +
drivers/power/ab8500_charger.c | 61 +++++++++++++++-----
5 files changed, 118 insertions(+), 13 deletions(-)
create mode 100644 Documentation/devicetree/bindings/power_supply/ab8500/charger.txt
diff --git a/Documentation/devicetree/bindings/mfd/ab8500.txt b/Documentation/devicetree/bindings/mfd/ab8500.txt
index 47d232e..4b45a73 100644
--- a/Documentation/devicetree/bindings/mfd/ab8500.txt
+++ b/Documentation/devicetree/bindings/mfd/ab8500.txt
@@ -36,6 +36,20 @@ ab8500-btemp : : vtvout : Battery Temperature
: BTEMP_HIGH : : BtempLow < Btemp < BtempMedium,if battery temperature is between -10 and 0°C
: BTEMP_LOW_MEDIUM : : BtempMedium < Btemp < BtempHigh,if battery temperature is between 0°C and“MaxTemp
: BTEMP_MEDIUM_HIGH : : Btemp > BtempHigh, if battery temperature is higher than “MaxTemp”
+ab8500-charger : : vddadc : Charger interface
+ : MAIN_CH_UNPLUG_DET : : main charger unplug detection management (not in 8505)
+ : MAIN_CHARGE_PLUG_DET : : main charger plug detection management (not in 8505)
+ : MAIN_EXT_CH_NOT_OK : : main charger not OK
+ : MAIN_CH_TH_PROT_R : : Die temp is above main charger
+ : MAIN_CH_TH_PROT_F : : Die temp is below main charger
+ : VBUS_DET_F : : VBUS falling detected
+ : VBUS_DET_R : : VBUS rising detected
+ : USB_LINK_STATUS : : USB link status has changed
+ : USB_CH_TH_PROT_R : : Die temp is above usb charger
+ : USB_CH_TH_PROT_F : : Die temp is below usb charger
+ : USB_CHARGER_NOT_OKR : : allowed USB charger not ok detection
+ : VBUS_OVV : : Overvoltage on Vbus ball detected (USB charge is stopped)
+ : CH_WD_EXP : : Charger watchdog detected
ab8500-gpadc : HW_CONV_END : vddadc : Analogue to Digital Converter
SW_CONV_END : :
ab8500-gpio : : : GPIO Controller
diff --git a/Documentation/devicetree/bindings/power_supply/ab8500/charger.txt b/Documentation/devicetree/bindings/power_supply/ab8500/charger.txt
new file mode 100644
index 0000000..b78d565
--- /dev/null
+++ b/Documentation/devicetree/bindings/power_supply/ab8500/charger.txt
@@ -0,0 +1,44 @@
+=== AB8500 Charger Driver ===
+
+Batter charger module is part of energy-management-module,
+the other components of this module are:
+main-charger, usb-combo-charger and fuel-gauge.
+
+The properties below describes the node for charger driver.
+
+Required Properties:
+- compatible = "stericsson,ab8500-charger"
+- interface-name:
+ Name of the controller/driver which is part of energy-management-module
+- supplied-to:
+ This property shall have dependent nodes which represent other
+ energy-management-module.
+ e.g:
+ ab8500-charger{
+ /* dependent energy management modules */
+ supplied-to = <
+ &ab8500_chargalg
+ &ab8500_fuel_gauge
+ &ab8500_battery_temp>;
+ };
+- vddadc-supply:
+ Supply for USB and Main charger
+ e.g.
+ ab8500-charger{
+ vddadc-supply = <&ab8500_ldo_tvout_reg>;
+ }
+- autopower_cfg:
+ Boolean value depicting the presence of 'automatic pwron after pwrloss'
+ e.g:
+ ab8500-charger{
+ autopower_cfg;
+ };
+
+dependent node:
+ ab8500_battery_info: ab8500_bat_type {
+ };
+ This node provide information on 'thermistor interface' and
+ 'battery technology type' used.
+
+ref: further details.
+ Documentation/devicetree/bindings/power_supply/ab8500/fg.txt
diff --git a/arch/arm/boot/dts/dbx5x0.dtsi b/arch/arm/boot/dts/dbx5x0.dtsi
index 9f5fde8..0848ae4 100644
--- a/arch/arm/boot/dts/dbx5x0.dtsi
+++ b/arch/arm/boot/dts/dbx5x0.dtsi
@@ -378,6 +378,17 @@
supplied-to = <&ab8500_chargalg &ab8500_fuel_gauge>;
};
+ ab8500_charger: ab8500_charger_if {
+ compatible = "stericsson,ab8500-charger";
+ interface-name = "ab8500_charger";
+ battery-info = <&ab8500_battery_info>;
+ supplied-to = <
+ &ab8500_chargalg
+ &ab8500_fuel_gauge
+ &ab8500_battery_temp>;
+ vddadc-supply = <&ab8500_ldo_tvout_reg>;
+ };
+
ab8500_usb: ab8500_usb_if {
compatible = "stericsson,ab8500-usb";
interface-name = "ab8500_usb";
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 0173417..0c81138 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -1041,6 +1041,7 @@ static struct mfd_cell __devinitdata abx500_common_devs[] = {
static struct mfd_cell __devinitdata ab8500_bm_devs[] = {
{
.name = "ab8500-charger",
+ .of_compatible = "stericsson,ab8500-charger",
.num_resources = ARRAY_SIZE(ab8500_charger_resources),
.resources = ab8500_charger_resources,
},
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 5ff0d83..456cd78 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -23,6 +23,7 @@
#include <linux/err.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
+#include <linux/of.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
@@ -2526,7 +2527,6 @@ static int __devexit ab8500_charger_remove(struct platform_device *pdev)
power_supply_unregister(&di->usb_chg.psy);
power_supply_unregister(&di->ac_chg.psy);
platform_set_drvdata(pdev, NULL);
- kfree(di);
return 0;
}
@@ -2535,17 +2535,44 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
{
int irq, i, charger_status, ret = 0;
struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
struct ab8500_charger *di;
+ di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
+ if (!di) {
+ dev_err(&pdev->dev, "%s no mem for ab8500_charger\n", __func__);
+ return -ENOMEM;
+ }
+ if (np) {
+ if (!plat_data) {
+ plat_data =
+ devm_kzalloc(&pdev->dev, sizeof(*plat_data),
+ GFP_KERNEL);
+ if (!plat_data) {
+ dev_err(&pdev->dev,
+ "%s no mem for plat_data\n", __func__);
+ return -ENOMEM;
+ }
+ plat_data->bmdev_pdata = devm_kzalloc(&pdev->dev,
+ sizeof(*plat_data->bmdev_pdata), GFP_KERNEL);
+ if (!plat_data->bmdev_pdata) {
+ dev_err(&pdev->dev,
+ "%s no mem for pdata->btemp\n",
+ __func__);
+ return -ENOMEM;
+ }
+ }
+ ret = bmdevs_of_probe(&pdev->dev, np, plat_data);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get platform data\n");
+ return ret;
+ }
+ }
if (!plat_data) {
dev_err(&pdev->dev, "No platform data\n");
return -EINVAL;
}
- di = kzalloc(sizeof(*di), GFP_KERNEL);
- if (!di)
- return -ENOMEM;
-
/* get parent data */
di->dev = &pdev->dev;
di->parent = dev_get_drvdata(pdev->dev.parent);
@@ -2558,16 +2585,21 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
di->pdata = plat_data->bmdev_pdata;
if (!di->pdata) {
dev_err(di->dev, "no charger platform data supplied\n");
- ret = -EINVAL;
- goto free_device_info;
+ return -EINVAL;
}
+ if (of_property_read_bool(np,
+ "autopower_cfg") == false){
+ dev_warn(di->dev, "missing property autopower_cfg\n");
+ di->pdata->autopower_cfg = false;
+ } else
+ di->pdata->autopower_cfg = true;
+
/* get battery specific platform data */
di->bat = plat_data->battery;
if (!di->bat) {
dev_err(di->dev, "no battery platform data supplied\n");
- ret = -EINVAL;
- goto free_device_info;
+ return -EINVAL;
}
di->autopower = false;
@@ -2614,7 +2646,7 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
create_singlethread_workqueue("ab8500_charger_wq");
if (di->charger_wq == NULL) {
dev_err(di->dev, "failed to create work queue\n");
- goto free_device_info;
+ return -ENOMEM;
}
/* Init work for HW failure check */
@@ -2666,7 +2698,6 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
goto free_charger_wq;
}
-
/* Initialize OVV, and other registers */
ret = ab8500_charger_init_hw_registers(di);
if (ret) {
@@ -2756,12 +2787,15 @@ free_regulator:
regulator_put(di->regu);
free_charger_wq:
destroy_workqueue(di->charger_wq);
-free_device_info:
- kfree(di);
return ret;
}
+static const struct of_device_id ab8500_charger_match[] = {
+ {.compatible = "stericsson,ab8500-charger",},
+ {},
+};
+
static struct platform_driver ab8500_charger_driver = {
.probe = ab8500_charger_probe,
.remove = __devexit_p(ab8500_charger_remove),
@@ -2770,6 +2804,7 @@ static struct platform_driver ab8500_charger_driver = {
.driver = {
.name = "ab8500-charger",
.owner = THIS_MODULE,
+ .of_match_table = ab8500_charger_match,
},
};
--
1.7.9.5
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