From: "Rajanikanth H.V" rajanikanth.hv@stericsson.com
This patch adds device tree support for charger driver
Signed-off-by: Rajanikanth H.V rajanikanth.hv@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, }, };