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path: root/drivers/power/tps65090-charger.c
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Diffstat (limited to 'drivers/power/tps65090-charger.c')
-rw-r--r--drivers/power/tps65090-charger.c76
1 files changed, 59 insertions, 17 deletions
diff --git a/drivers/power/tps65090-charger.c b/drivers/power/tps65090-charger.c
index 1685f63b9e5d..3e8ba97c8169 100644
--- a/drivers/power/tps65090-charger.c
+++ b/drivers/power/tps65090-charger.c
@@ -17,9 +17,11 @@
*/
#include <linux/delay.h>
#include <linux/err.h>
+#include <linux/freezer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
+#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
@@ -32,11 +34,15 @@
#define TPS65090_VACG BIT(1)
#define TPS65090_NOITERM BIT(5)
+#define POLL_INTERVAL (HZ * 2) /* Used when no irq */
+
struct tps65090_charger {
struct device *dev;
int ac_online;
int prev_ac_online;
int irq;
+ struct task_struct *poll_task;
+ bool passive_mode;
struct power_supply ac;
struct tps65090_platform_data *pdata;
};
@@ -49,6 +55,9 @@ static int tps65090_low_chrg_current(struct tps65090_charger *charger)
{
int ret;
+ if (charger->passive_mode)
+ return 0;
+
ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5,
TPS65090_NOITERM);
if (ret < 0) {
@@ -64,6 +73,9 @@ static int tps65090_enable_charging(struct tps65090_charger *charger)
int ret;
uint8_t ctrl0 = 0;
+ if (charger->passive_mode)
+ return 0;
+
ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0,
&ctrl0);
if (ret < 0) {
@@ -87,6 +99,9 @@ static int tps65090_config_charger(struct tps65090_charger *charger)
uint8_t intrmask = 0;
int ret;
+ if (charger->passive_mode)
+ return 0;
+
if (charger->pdata->enable_low_current_chrg) {
ret = tps65090_low_chrg_current(charger);
if (ret < 0) {
@@ -164,10 +179,14 @@ static irqreturn_t tps65090_charger_isr(int irq, void *dev_id)
}
/* Clear interrupts. */
- ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_STS, 0x00);
- if (ret < 0) {
- dev_err(charger->dev, "%s(): Error in writing reg 0x%x\n",
+ if (!charger->passive_mode) {
+ ret = tps65090_write(charger->dev->parent,
+ TPS65090_REG_INTR_STS, 0x00);
+ if (ret < 0) {
+ dev_err(charger->dev,
+ "%s(): Error in writing reg 0x%x\n",
__func__, TPS65090_REG_INTR_STS);
+ }
}
if (charger->prev_ac_online != charger->ac_online)
@@ -198,6 +217,18 @@ static struct tps65090_platform_data *
}
+static int tps65090_charger_poll_task(void *data)
+{
+ set_freezable();
+
+ while (!kthread_should_stop()) {
+ schedule_timeout_interruptible(POLL_INTERVAL);
+ try_to_freeze();
+ tps65090_charger_isr(-1, data);
+ }
+ return 0;
+}
+
static int tps65090_charger_probe(struct platform_device *pdev)
{
struct tps65090_charger *cdata;
@@ -244,22 +275,10 @@ static int tps65090_charger_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_warn(&pdev->dev, "Unable to get charger irq = %d\n", irq);
- ret = irq;
- goto fail_unregister_supply;
- }
-
+ if (irq < 0)
+ irq = -ENXIO;
cdata->irq = irq;
- ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
- tps65090_charger_isr, 0, "tps65090-charger", cdata);
- if (ret) {
- dev_err(cdata->dev, "Unable to register irq %d err %d\n", irq,
- ret);
- goto fail_unregister_supply;
- }
-
ret = tps65090_config_charger(cdata);
if (ret < 0) {
dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
@@ -285,6 +304,27 @@ static int tps65090_charger_probe(struct platform_device *pdev)
power_supply_changed(&cdata->ac);
}
+ if (irq != -ENXIO) {
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ tps65090_charger_isr, 0, "tps65090-charger", cdata);
+ if (ret) {
+ dev_err(cdata->dev,
+ "Unable to register irq %d err %d\n", irq,
+ ret);
+ goto fail_unregister_supply;
+ }
+ } else {
+ cdata->poll_task = kthread_run(tps65090_charger_poll_task,
+ cdata, "ktps65090charger");
+ cdata->passive_mode = true;
+ if (IS_ERR(cdata->poll_task)) {
+ ret = PTR_ERR(cdata->poll_task);
+ dev_err(cdata->dev,
+ "Unable to run kthread err %d\n", ret);
+ goto fail_unregister_supply;
+ }
+ }
+
return 0;
fail_unregister_supply:
@@ -297,6 +337,8 @@ static int tps65090_charger_remove(struct platform_device *pdev)
{
struct tps65090_charger *cdata = platform_get_drvdata(pdev);
+ if (cdata->irq == -ENXIO)
+ kthread_stop(cdata->poll_task);
power_supply_unregister(&cdata->ac);
return 0;