From: "Rajanikanth H.V" rajanikanth.hv@stericsson.com
This patch adds device tree support for battery-temperature-monitor-driver
Signed-off-by: Rajanikanth H.V rajanikanth.hv@stericsson.com --- Documentation/devicetree/bindings/mfd/ab8500.txt | 7 ++- .../bindings/power_supply/ab8500/btemp.txt | 29 +++++++++++ arch/arm/boot/dts/dbx5x0.dtsi | 7 +++ drivers/mfd/ab8500-core.c | 1 + drivers/power/Kconfig | 6 --- drivers/power/ab8500_bmdata.c | 4 +- drivers/power/ab8500_btemp.c | 53 +++++++++++++++----- 7 files changed, 86 insertions(+), 21 deletions(-) create mode 100644 Documentation/devicetree/bindings/power_supply/ab8500/btemp.txt
diff --git a/Documentation/devicetree/bindings/mfd/ab8500.txt b/Documentation/devicetree/bindings/mfd/ab8500.txt index 762dc11..47d232e 100644 --- a/Documentation/devicetree/bindings/mfd/ab8500.txt +++ b/Documentation/devicetree/bindings/mfd/ab8500.txt @@ -30,7 +30,12 @@ ab8500-fg : : vddadc : Fuel Gauge : LOW_BAT_F : : LOW threshold battery voltage : CC_INT_CALIB : : Counter Counter Internal Calibration : CCEOC : : Coulomb Counter End of Conversion - : : : +ab8500-btemp : : vtvout : Battery Temperature + : BAT_CTRL_INDB : : Battery Removal Indicator + : BTEMP_LOW : : Btemp < BtempLow, if battery temperature is lower than -10°C + : 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-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/btemp.txt b/Documentation/devicetree/bindings/power_supply/ab8500/btemp.txt new file mode 100644 index 0000000..f58c697 --- /dev/null +++ b/Documentation/devicetree/bindings/power_supply/ab8500/btemp.txt @@ -0,0 +1,29 @@ +=== AB8500 Battery Temperature Monitor Driver === + +Battery temperature monitoring support 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 battery +temperature monitor driver. + +Required Properties: +- compatible = "stericsson,ab8500-btemp" +- 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. + example: + ab8500-btemp { + /* dependent energy management modules */ + supplied-to = <&ab8500_chargalg &ab8500_fuel_gauge>; + }; +Other dependent node for battery temperature is: + ab8500_battery_info: ab8500_bat_type { + }; + This node will 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 bd22c56..9f5fde8 100644 --- a/arch/arm/boot/dts/dbx5x0.dtsi +++ b/arch/arm/boot/dts/dbx5x0.dtsi @@ -371,6 +371,13 @@ supplied-to = <&ab8500_chargalg &ab8500_usb>; };
+ ab8500_battery_temp: ab8500_btemp { + compatible = "stericsson,ab8500-btemp"; + interface-name = "ab8500_btemp"; + battery-info = <&ab8500_battery_info>; + supplied-to = <&ab8500_chargalg &ab8500_fuel_gauge>; + }; + 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 6c3d7c2..0173417 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -1046,6 +1046,7 @@ static struct mfd_cell __devinitdata ab8500_bm_devs[] = { }, { .name = "ab8500-btemp", + .of_compatible = "stericsson,ab8500-btemp", .num_resources = ARRAY_SIZE(ab8500_btemp_resources), .resources = ab8500_btemp_resources, }, diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index c1892f3..1434871 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -304,12 +304,6 @@ config AB8500_BM help Say Y to include support for AB8500 battery management.
-config AB8500_BATTERY_THERM_ON_BATCTRL - bool "Thermistor connected on BATCTRL ADC" - depends on AB8500_BM - help - Say Y to enable battery temperature measurements using - thermistor connected on BATCTRL ADC. endif # POWER_SUPPLY
source "drivers/power/avs/Kconfig" diff --git a/drivers/power/ab8500_bmdata.c b/drivers/power/ab8500_bmdata.c index d0def3b..90d0e51 100644 --- a/drivers/power/ab8500_bmdata.c +++ b/drivers/power/ab8500_bmdata.c @@ -29,7 +29,7 @@ static struct abx500_res_to_temp temp_tbl_A_thermistor[] = { {65, 12500}, }; static struct abx500_res_to_temp temp_tbl_B_thermistor[] = { - {-5, 165418}, + {-5, 200000}, { 0, 159024}, { 5, 151921}, {10, 144300}, @@ -237,7 +237,7 @@ struct abx500_battery_type bat_type_thermistor[] = { }, { .name = POWER_SUPPLY_TECHNOLOGY_LIPO, - .resis_high = 165418, + .resis_high = 200000, .resis_low = 82869, .battery_resistance = 300, .charge_full_design = 900, diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c index 8e427e7..c4291e0 100644 --- a/drivers/power/ab8500_btemp.c +++ b/drivers/power/ab8500_btemp.c @@ -20,6 +20,7 @@ #include <linux/power_supply.h> #include <linux/completion.h> #include <linux/workqueue.h> +#include <linux/of.h> #include <linux/mfd/abx500/ab8500.h> #include <linux/mfd/abx500.h> #include <linux/mfd/abx500/ab8500-bm.h> @@ -955,7 +956,6 @@ static int __devexit ab8500_btemp_remove(struct platform_device *pdev) flush_scheduled_work(); power_supply_unregister(&di->btemp_psy); platform_set_drvdata(pdev, NULL); - kfree(di);
return 0; } @@ -965,17 +965,44 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev) int irq, i, ret = 0; u8 val; struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data; + struct device_node *np = pdev->dev.of_node; struct ab8500_btemp *di;
+ di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL); + if (!di) { + dev_err(&pdev->dev, "%s no mem for ab8500_btemp\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); @@ -985,16 +1012,14 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev) di->pdata = plat_data->bmdev_pdata; if (!di->pdata) { dev_err(di->dev, "no btemp platform data supplied\n"); - ret = -EINVAL; - goto free_device_info; + return -EINVAL; }
/* 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; }
/* BTEMP supply */ @@ -1014,7 +1039,7 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev) create_singlethread_workqueue("ab8500_btemp_wq"); if (di->btemp_wq == NULL) { dev_err(di->dev, "failed to create work queue\n"); - goto free_device_info; + return -ENOMEM; }
/* Init work for measuring temperature periodically */ @@ -1092,12 +1117,15 @@ free_irq: } free_btemp_wq: destroy_workqueue(di->btemp_wq); -free_device_info: - kfree(di);
return ret; }
+static const struct of_device_id ab8500_btemp_match[] = { + {.compatible = "stericsson,ab8500-btemp",}, + {}, +}; + static struct platform_driver ab8500_btemp_driver = { .probe = ab8500_btemp_probe, .remove = __devexit_p(ab8500_btemp_remove), @@ -1106,6 +1134,7 @@ static struct platform_driver ab8500_btemp_driver = { .driver = { .name = "ab8500-btemp", .owner = THIS_MODULE, + .of_match_table = ab8500_btemp_match, }, };