Allow the possibility to configure the charge and the current voltage of
the charger and also the NTC type for battery temperature measurement.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
---
Changes since v2:
- Requested by Sebastian Reichel
- Use the simple-battery framework
- Use device_property_read_u32 instead of of_property_read_u32
Changes since v1:
- None
drivers/power/supply/tps65217_charger.c | 194 ++++++++++++++++++++++++++++++--
include/linux/mfd/tps65217.h | 2 +
2 files changed, 188 insertions(+), 8 deletions(-)
diff --git a/drivers/power/supply/tps65217_charger.c b/drivers/power/supply/tps65217_charger.c
index 1f52340..5939e77 100644
--- a/drivers/power/supply/tps65217_charger.c
+++ b/drivers/power/supply/tps65217_charger.c
@@ -39,6 +39,12 @@
#define NUM_CHARGER_IRQS 2
#define POLL_INTERVAL (HZ * 2)
+struct tps65217_charger_platform_data {
+ int charge_voltage_uv;
+ int charge_current_ua;
+ int ntc_type;
+};
+
struct tps65217_charger {
struct tps65217 *tps;
struct device *dev;
@@ -48,16 +54,84 @@ struct tps65217_charger {
int prev_online;
struct task_struct *poll_task;
+ struct tps65217_charger_platform_data *pdata;
};
static enum power_supply_property tps65217_charger_props[] = {
POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
};
-static int tps65217_config_charger(struct tps65217_charger *charger)
+static int tps65217_set_charge_current(struct tps65217_charger *charger,
+ unsigned int uamp)
+{
+ int ret, val;
+
+ dev_dbg(charger->dev, "setting charge current to %d uA\n", uamp);
+
+ if (uamp == 300000)
+ val = 0x00;
+ else if (uamp == 400000)
+ val = 0x01;
+ else if (uamp == 500000)
+ val = 0x02;
+ else if (uamp == 700000)
+ val = 0x03;
+ else
+ return -EINVAL;
+
+ ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG3,
+ TPS65217_CHGCONFIG3_ICHRG_MASK,
+ val << TPS65217_CHGCONFIG3_ICHRG_SHIFT,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set ICHRG setting to 0x%02x (err: %d)\n",
+ val, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65217_set_charge_voltage(struct tps65217_charger *charger,
+ unsigned int uvolt)
+{
+ int ret, val;
+
+ dev_dbg(charger->dev, "setting charge voltage to %d uV\n", uvolt);
+
+ if (uvolt != 4100000 && uvolt != 4150000 &&
+ uvolt != 4200000 && uvolt != 4250000)
+ return -EINVAL;
+
+ val = (uvolt - 4100000) / 50000;
+
+ ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG2,
+ TPS65217_CHGCONFIG2_VOREG_MASK,
+ val << TPS65217_CHGCONFIG2_VOREG_SHIFT,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set VOCHG setting to 0x%02x (err: %d)\n",
+ val, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65217_set_ntc_type(struct tps65217_charger *charger,
+ unsigned int ntc)
{
int ret;
+ dev_dbg(charger->dev, "setting NTC type to %d\n", ntc);
+
+ if (ntc != 0 && ntc != 1)
+ return -EINVAL;
+
/*
* tps65217 rev. G, p. 31 (see p. 32 for NTC schematic)
*
@@ -74,14 +148,57 @@ static int tps65217_config_charger(struct tps65217_charger *charger)
* NTC TYPE (for battery temperature measurement)
* 0 – 100k (curve 1, B = 3960)
* 1 – 10k (curve 2, B = 3480) (default on reset)
- *
*/
- ret = tps65217_clear_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
- TPS65217_CHGCONFIG1_NTC_TYPE,
- TPS65217_PROTECT_NONE);
+ if (ntc) {
+ ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
+ TPS65217_CHGCONFIG1_NTC_TYPE,
+ TPS65217_CHGCONFIG1_NTC_TYPE,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set NTC type to 10K: %d\n", ret);
+ return ret;
+ }
+ } else {
+ ret = tps65217_clear_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
+ TPS65217_CHGCONFIG1_NTC_TYPE,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set NTC type to 100K: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int tps65217_config_charger(struct tps65217_charger *charger)
+{
+ int ret;
+ struct tps65217_charger_platform_data *pdata = charger->pdata;
+
+ if (!charger->pdata)
+ return -EINVAL;
+
+ ret = tps65217_set_charge_voltage(charger, pdata->charge_voltage_uv);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set charge voltage setting: %d\n", ret);
+ return ret;
+ }
+
+ ret = tps65217_set_charge_current(charger, pdata->charge_current_ua);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set charge current setting: %d\n", ret);
+ return ret;
+ }
+
+ ret = tps65217_set_ntc_type(charger, pdata->ntc_type);
if (ret) {
dev_err(charger->dev,
- "failed to set 100k NTC setting: %d\n", ret);
+ "failed to set NTC type setting: %d\n", ret);
return ret;
}
@@ -118,11 +235,23 @@ static int tps65217_charger_get_property(struct power_supply *psy,
union power_supply_propval *val)
{
struct tps65217_charger *charger = power_supply_get_drvdata(psy);
+ struct tps65217_charger_platform_data *pdata = charger->pdata;
if (psp == POWER_SUPPLY_PROP_ONLINE) {
val->intval = charger->online;
return 0;
}
+
+ if (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE) {
+ val->intval = pdata->charge_voltage_uv;
+ return 0;
+ }
+
+ if (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) {
+ val->intval = pdata->charge_current_ua;
+ return 0;
+ }
+
return -EINVAL;
}
@@ -185,6 +314,49 @@ static int tps65217_charger_poll_task(void *data)
return 0;
}
+#ifdef CONFIG_OF
+static struct tps65217_charger_platform_data *tps65217_charger_pdata_init(
+ struct tps65217_charger *charger)
+{
+ struct tps65217_charger_platform_data *pdata;
+ struct power_supply_battery_info info = {};
+ int ret;
+
+ pdata = devm_kzalloc(charger->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * If battery info is not supplied just ignore and program default
+ * values.
+ */
+ power_supply_get_battery_info(charger->psy, &info);
+
+ if (info.charge_voltage_uv > 0)
+ pdata->charge_voltage_uv = info.charge_voltage_uv;
+ else
+ pdata->charge_voltage_uv = 4100000;
+
+ if (info.charge_current_ua > 0)
+ pdata->charge_current_ua = info.charge_current_ua;
+ else
+ pdata->charge_current_ua = 500000;
+
+ ret = device_property_read_u32(charger->dev, "ti,ntc-type",
+ &pdata->ntc_type);
+ if (ret)
+ pdata->ntc_type = 1; /* 10k (curve 2, B = 3480) */
+
+ return pdata;
+}
+#else /* CONFIG_OF */
+static struct tps65217_charger_platform_data *tps65217_charger_pdata_init(
+ struct tps65217_charger *charger)
+{
+ return NULL;
+}
+#endif /* CONFIG_OF */
+
static const struct power_supply_desc tps65217_charger_desc = {
.name = "tps65217-charger",
.type = POWER_SUPPLY_TYPE_MAINS,
@@ -222,8 +394,11 @@ static int tps65217_charger_probe(struct platform_device *pdev)
return PTR_ERR(charger->psy);
}
- irq[0] = platform_get_irq_byname(pdev, "USB");
- irq[1] = platform_get_irq_byname(pdev, "AC");
+ charger->pdata = tps65217_charger_pdata_init(charger);
+ if (IS_ERR(charger->pdata)) {
+ dev_err(charger->dev, "failed: getting platform data\n");
+ return PTR_ERR(charger->pdata);
+ }
ret = tps65217_config_charger(charger);
if (ret < 0) {
@@ -231,6 +406,9 @@ static int tps65217_charger_probe(struct platform_device *pdev)
return ret;
}
+ irq[0] = platform_get_irq_byname(pdev, "USB");
+ irq[1] = platform_get_irq_byname(pdev, "AC");
+
/* Create a polling thread if an interrupt is invalid */
if (irq[0] < 0 || irq[1] < 0) {
poll_task = kthread_run(tps65217_charger_poll_task,
diff --git a/include/linux/mfd/tps65217.h b/include/linux/mfd/tps65217.h
index eac2857..d040062 100644
--- a/include/linux/mfd/tps65217.h
+++ b/include/linux/mfd/tps65217.h
@@ -103,8 +103,10 @@
#define TPS65217_CHGCONFIG2_DYNTMR BIT(7)
#define TPS65217_CHGCONFIG2_VPREGHG BIT(6)
#define TPS65217_CHGCONFIG2_VOREG_MASK 0x30
+#define TPS65217_CHGCONFIG2_VOREG_SHIFT 4
#define TPS65217_CHGCONFIG3_ICHRG_MASK 0xC0
+#define TPS65217_CHGCONFIG3_ICHRG_SHIFT 6
#define TPS65217_CHGCONFIG3_DPPMTH_MASK 0x30
#define TPS65217_CHGCONFIG2_PCHRGT BIT(3)
#define TPS65217_CHGCONFIG2_TERMIF 0x06
--
2.9.3
--
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