[PATCH 2/3] power: bq24735-charger: add 'ti,external-control' option

[Jonathan Tinkham <sctincman-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Implement an 'ti,external-control' option for when the charger
shouldn't be configured by the host.

Signed-off-by: Jonathan Tinkham <sctincman-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/power/bq24735-charger.c       | 11 +++++++++++
 include/linux/power/bq24735-charger.h |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/drivers/power/bq24735-charger.c b/drivers/power/bq24735-charger.c
index f041c16..96afcc1 100644
--- a/drivers/power/bq24735-charger.c
+++ b/drivers/power/bq24735-charger.c
@@ -90,6 +90,9 @@ static int bq24735_update_word(struct i2c_client *client, u8 reg,
 
 static inline int bq24735_enable_charging(struct bq24735 *charger)
 {
+	if (charger->pdata->ext_control)
+		return 0;
+
 	return bq24735_update_word(charger->client, BQ24735_CHG_OPT,
 				   BQ24735_CHG_OPT_CHARGE_DISABLE,
 				   ~BQ24735_CHG_OPT_CHARGE_DISABLE);
@@ -97,6 +100,9 @@ static inline int bq24735_enable_charging(struct bq24735 *charger)
 
 static inline int bq24735_disable_charging(struct bq24735 *charger)
 {
+	if (charger->pdata->ext_control)
+		return 0;
+
 	return bq24735_update_word(charger->client, BQ24735_CHG_OPT,
 				   BQ24735_CHG_OPT_CHARGE_DISABLE,
 				   BQ24735_CHG_OPT_CHARGE_DISABLE);
@@ -108,6 +114,9 @@ static int bq24735_config_charger(struct bq24735 *charger)
 	int ret;
 	u16 value;
 
+	if (pdata->ext_control)
+		return 0;
+
 	if (pdata->charge_current) {
 		value = pdata->charge_current & BQ24735_CHARGE_CURRENT_MASK;
 
@@ -239,6 +248,8 @@ static struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client)
 	if (!ret)
 		pdata->input_current = val;
 
+	pdata->ext_control = of_property_read_bool(np, "ti,external-control");
+
 	return pdata;
 }
 
diff --git a/include/linux/power/bq24735-charger.h b/include/linux/power/bq24735-charger.h
index f536164..6b750c1a 100644
--- a/include/linux/power/bq24735-charger.h
+++ b/include/linux/power/bq24735-charger.h
@@ -32,6 +32,8 @@ struct bq24735_platform {
 	int status_gpio_active_low;
 	bool status_gpio_valid;
 
+	bool ext_control;
+
 	char **supplied_to;
 	size_t num_supplicants;
 };
-- 
2.7.0

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