ab8500: Add devicetree support for charger

This patch adds device tree support for ab8500-charger driver

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

5 files changed, 95 insertions, 29 deletions

diff --git a/Documentation/devicetree/bindings/mfd/ab8500.txt b/Documentation/devicetree/bindings/mfd/ab8500.txt
index f2ee0e7a5da3..13b707b7355c 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_LOW_MEDIUM     :              : BtempLow < Btemp < BtempMedium,if battery temperature is between -10 and 0°C
                          : BTEMP_MEDIUM_HIGH    :              : BtempMedium < Btemp < BtempHigh,if battery temperature is between 0°C and“MaxTemp
                          : BTEMP_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 000000000000..6bdbb08ea9e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/power_supply/ab8500/charger.txt
@@ -0,0 +1,25 @@
+=== AB8500 Charger Driver ===
+
+Required Properties:
+- compatible = Shall be "stericsson,ab8500-charger"
+- battery = Shall be battery specific information
+        Example:
+        ab8500_charger {
+                compatible = "stericsson,ab8500-charger";
+                battery    = <&ab8500_battery>;
+        };
+
+- vddadc-supply: Supply for USB and Main charger
+        Example:
+        ab8500-charger {
+                vddadc-supply   = <&ab8500_ldo_tvout_reg>;
+        }
+- autopower_cfg:
+        Boolean value depicting the presence of 'automatic poweron after powerloss'
+        Example:
+        ab8500-charger {
+                autopower_cfg;
+        };
+
+For information on battery specific node, Ref:
+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 d170fadd7ddb..1d4ad3098aeb 100644
--- a/arch/arm/boot/dts/dbx5x0.dtsi
+++ b/arch/arm/boot/dts/dbx5x0.dtsi
@@ -367,6 +367,12 @@
                                         battery    = <&ab8500_battery>;
                                 };
 
+                                ab8500_charger {
+                                        compatible      = "stericsson,ab8500-charger";
+                                        battery         = <&ab8500_battery>;
+                                        vddadc-supply   = <&ab8500_ldo_tvout_reg>;
+                                };
+
                                 ab8500_usb {
                                         compatible = "stericsson,ab8500-usb";
                                         interrupts = < 90 0x4
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 94d45be5c1b4..c7a120bfd50a 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -1041,8 +1041,13 @@ 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,
+#ifndef CONFIG_OF
+                .platform_data = &ab8500_bm_data,
+                .pdata_size = sizeof(ab8500_bm_data),
+#endif
         },
         {
                 .name = "ab8500-btemp",
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 723edb47b1d8..dddc9473f72a 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -23,6 +23,8 @@
 #include <linux/err.h>
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
+#include <linux/of.h>
+#include <linux/mfd/core.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500-bm.h>
@@ -181,9 +183,9 @@ struct ab8500_charger_usb_state {
  * @vbat                Battery voltage
  * @old_vbat            Previously measured battery voltage
  * @autopower           Indicate if we should have automatic pwron after pwrloss
+ * @autopower_cfg       platform specific power config support for "pwron after pwrloss"
  * @parent:             Pointer to the struct ab8500
  * @gpadc:              Pointer to the struct gpadc
- * @pdata:              Pointer to the abx500_charger platform data
  * @bat:                Pointer to the abx500_bm platform data
  * @flags:              Structure for information about events triggered
  * @usb_state:          Structure for usb stack information
@@ -218,9 +220,9 @@ struct ab8500_charger {
         int vbat;
         int old_vbat;
         bool autopower;
+        bool autopower_cfg;
         struct ab8500 *parent;
         struct ab8500_gpadc *gpadc;
-        struct abx500_bmdevs_plat_data *pdata;
         struct abx500_bm_data *bat;
         struct ab8500_charger_event_flags flags;
         struct ab8500_charger_usb_state usb_state;
@@ -322,7 +324,7 @@ static void ab8500_power_loss_handling(struct ab8500_charger *di)
 static void ab8500_power_supply_changed(struct ab8500_charger *di,
                                         struct power_supply *psy)
 {
-        if (di->pdata->autopower_cfg) {
+        if (di->autopower_cfg) {
                 if (!di->usb.charger_connected &&
                     !di->ac.charger_connected &&
                     di->autopower) {
@@ -2526,25 +2528,45 @@ 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;
 }
 
+static char *supply_interface[] = {
+        "ab8500_chargalg",
+        "ab8500_fg",
+        "ab8500_btemp",
+};
+
 static int __devinit ab8500_charger_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_charger *di;
         int irq, i, charger_status, ret = 0;
 
-        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_charger\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;
+                        }
+                        di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
+                } else {
+                        dev_err(&pdev->dev, "missing dt node for ab8500_charger\n");
+                        return -EINVAL;
+                }
+        } else {
+                dev_info(&pdev->dev, "falling back to legacy platform data\n");
+                di->autopower_cfg = false;
+        }
 
         /* get parent data */
         di->dev = &pdev->dev;
@@ -2554,14 +2576,6 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
         /* initialize lock */
         spin_lock_init(&di->usb_state.usb_lock);
 
-        /* get charger specific platform data */
-        di->pdata = plat_data;
-        if (!di->pdata) {
-                dev_err(di->dev, "no charger platform data supplied\n");
-                ret = -EINVAL;
-                goto free_device_info;
-        }
-
         di->autopower = false;
 
         /* AC supply */
@@ -2571,8 +2585,8 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
         di->ac_chg.psy.properties = ab8500_charger_ac_props;
         di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
         di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
-        di->ac_chg.psy.supplied_to = di->pdata->supplied_to;
-        di->ac_chg.psy.num_supplicants = di->pdata->num_supplicants;
+        di->ac_chg.psy.supplied_to = supply_interface;
+        di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
         /* ux500_charger sub-class */
         di->ac_chg.ops.enable = &ab8500_charger_ac_en;
         di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
@@ -2589,8 +2603,8 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
         di->usb_chg.psy.properties = ab8500_charger_usb_props;
         di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
         di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
-        di->usb_chg.psy.supplied_to = di->pdata->supplied_to;
-        di->usb_chg.psy.num_supplicants = di->pdata->num_supplicants;
+        di->usb_chg.psy.supplied_to = supply_interface;
+        di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
         /* ux500_charger sub-class */
         di->usb_chg.ops.enable = &ab8500_charger_usb_en;
         di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
@@ -2606,8 +2620,7 @@ 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");
-                ret = -ENOMEM;
-                goto free_device_info;
+                return -ENOMEM;
         }
 
         /* Init work for HW failure check */
@@ -2749,12 +2762,14 @@ 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),
@@ -2763,6 +2778,7 @@ static struct platform_driver ab8500_charger_driver = {
         .driver = {
                 .name = "ab8500-charger",
                 .owner = THIS_MODULE,
+                .of_match_table = ab8500_charger_match,
         },
 };