ab8500: Add devicetree support for btemp

This patch adds device tree support for battery-temperature-monitor driver

Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

3 files changed, 41 insertions, 36 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 523a58014ed5..263499f8709a 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -346,12 +346,6 @@ 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 e7639b6659f7..03cc528425cb 100644
--- a/drivers/power/ab8500_bmdata.c
+++ b/drivers/power/ab8500_bmdata.c
@@ -30,7 +30,7 @@ static struct abx500_res_to_temp temp_tbl_A_thermistor[] = {
 };
 
 static struct abx500_res_to_temp temp_tbl_B_thermistor[] = {
-        {-5, 165418},
+        {-5, 200000},
         { 0, 159024},
         { 5, 151921},
         {10, 144300},
@@ -240,7 +240,7 @@ static 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 abc2abc16a5d..8135542ee746 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -20,11 +20,13 @@
 #include <linux/power_supply.h>
 #include <linux/completion.h>
 #include <linux/workqueue.h>
-#include <linux/mfd/abx500/ab8500.h>
+#include <linux/jiffies.h>
+#include <linux/of.h>
+#include <linux/mfd/core.h>
 #include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
 #include <linux/mfd/abx500/ab8500-gpadc.h>
-#include <linux/jiffies.h>
 
 #define VTVOUT_V                        1800
 
@@ -76,7 +78,6 @@ struct ab8500_btemp_ranges {
  * @parent:             Pointer to the struct ab8500
  * @gpadc:              Pointer to the struct gpadc
  * @fg:                 Pointer to the struct fg
- * @pdata:              Pointer to the abx500_btemp platform data
  * @bat:                Pointer to the abx500_bm platform data
  * @btemp_psy:          Structure for BTEMP specific battery properties
  * @events:             Structure for information about events triggered
@@ -93,7 +94,6 @@ struct ab8500_btemp {
         struct ab8500 *parent;
         struct ab8500_gpadc *gpadc;
         struct ab8500_fg *fg;
-        struct abx500_bmdevs_plat_data *pdata;
         struct abx500_bm_data *bat;
         struct power_supply btemp_psy;
         struct ab8500_btemp_events events;
@@ -955,48 +955,57 @@ 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;
 }
 
+static char *supply_interface[] = {
+        "ab8500_chargalg",
+        "ab8500_fg",
+};
+
 static int __devinit ab8500_btemp_probe(struct platform_device *pdev)
 {
-        struct abx500_bmdevs_plat_data *plat_data = pdev->dev.platform_data;
+        struct device_node *np = pdev->dev.of_node;
         struct ab8500_btemp *di;
         int irq, i, ret = 0;
         u8 val;
 
-        if (!plat_data) {
-                dev_err(&pdev->dev, "No platform data\n");
-                return -EINVAL;
-        }
-
-        di = kzalloc(sizeof(*di), GFP_KERNEL);
-        if (!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;
+        }
+        di->bat = pdev->mfd_cell->platform_data;
+        if (!di->bat) {
+                if (np) {
+                        ret = bmdevs_of_probe(&pdev->dev, np, &di->bat);
+                        if (ret) {
+                                dev_err(&pdev->dev,
+                                        "failed to get battery information\n");
+                                return ret;
+                        }
+                } else {
+                        dev_err(&pdev->dev, "missing dt node for ab8500_btemp\n");
+                        return -EINVAL;
+                }
+        } else {
+                dev_info(&pdev->dev, "falling back to legacy platform data\n");
+        }
 
         /* get parent data */
         di->dev = &pdev->dev;
         di->parent = dev_get_drvdata(pdev->dev.parent);
         di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
 
-        /* get btemp specific platform data */
-        di->pdata = plat_data;
-        if (!di->pdata) {
-                dev_err(di->dev, "no btemp platform data supplied\n");
-                ret = -EINVAL;
-                goto free_device_info;
-        }
-
         /* BTEMP supply */
         di->btemp_psy.name = "ab8500_btemp";
         di->btemp_psy.type = POWER_SUPPLY_TYPE_BATTERY;
         di->btemp_psy.properties = ab8500_btemp_props;
         di->btemp_psy.num_properties = ARRAY_SIZE(ab8500_btemp_props);
         di->btemp_psy.get_property = ab8500_btemp_get_property;
-        di->btemp_psy.supplied_to = di->pdata->supplied_to;
-        di->btemp_psy.num_supplicants = di->pdata->num_supplicants;
+        di->btemp_psy.supplied_to = supply_interface;
+        di->btemp_psy.num_supplicants = ARRAY_SIZE(supply_interface);
         di->btemp_psy.external_power_changed =
                 ab8500_btemp_external_power_changed;
 
@@ -1006,8 +1015,7 @@ 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");
-                ret = -ENOMEM;
-                goto free_device_info;
+                return -ENOMEM;
         }
 
         /* Init work for measuring temperature periodically */
@@ -1085,12 +1093,14 @@ 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),
@@ -1099,6 +1109,7 @@ static struct platform_driver ab8500_btemp_driver = {
         .driver = {
                 .name = "ab8500-btemp",
                 .owner = THIS_MODULE,
+                .of_match_table = ab8500_btemp_match,
         },
 };