[PATCH 3/4] mfd: ab8500: add devicetree support for charger
Rajanikanth H.V
rajanikanth.hv at linaro.org
Wed Oct 31 11:40:32 EDT 2012
From: "Rajanikanth H.V" <rajanikanth.hv at stericsson.com>
This patch adds device tree support for ab8500-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 | 25 +++++++
arch/arm/boot/dts/dbx5x0.dtsi | 6 ++
drivers/mfd/ab8500-core.c | 5 ++
drivers/power/ab8500_charger.c | 73 ++++++++++++--------
5 files changed, 95 insertions(+), 28 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 f2ee0e7..13b707b 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 0000000..6bdbb08
--- /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 79fdee4..b1ecb5d 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 94d45be..c7a120b 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 78a730c..a140564 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;
@@ -2606,7 +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");
- goto free_device_info;
+ return -ENOMEM;
}
/* Init work for HW failure check */
@@ -2748,12 +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),
@@ -2762,6 +2778,7 @@ static struct platform_driver ab8500_charger_driver = {
.driver = {
.name = "ab8500-charger",
.owner = THIS_MODULE,
+ .of_match_table = ab8500_charger_match,
},
};
--
1.7.10.4
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