From: Andreas Dannenberg <dannenberg@ti.com>
To: Sebastian Reichel <sre@kernel.org>,
Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
Laurentiu Palcu <laurentiu.palcu@intel.com>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Ramakrishna Pallala <ramakrishna.pallala@intel.com>,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
Andreas Dannenberg <dannenberg@ti.com>
Subject: [PATCH v3 07/10] power: bq24257: Add input DPM voltage threshold setting support
Date: Fri, 11 Sep 2015 15:26:39 -0500 [thread overview]
Message-ID: <1442003202-1430-8-git-send-email-dannenberg@ti.com> (raw)
In-Reply-To: <1442003202-1430-1-git-send-email-dannenberg@ti.com>
A new optional device property called "ti,in-dpm-voltage" is introduced
to allow configuring the input voltage threshold for the devices'
dynamic power path management (DPM) feature. In short, it can be used to
prevent the input voltage from dropping below a certain value as current
is drawn to charge the battery or supply the system.
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
---
drivers/power/bq24257_charger.c | 44 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/drivers/power/bq24257_charger.c b/drivers/power/bq24257_charger.c
index 47af858..84a8945 100644
--- a/drivers/power/bq24257_charger.c
+++ b/drivers/power/bq24257_charger.c
@@ -76,6 +76,7 @@ struct bq24257_init_data {
u8 iterm; /* termination current */
u8 in_ilimit; /* input current limit */
u8 vovp; /* over voltage protection voltage */
+ u8 vindpm; /* VDMP input threshold voltage */
};
struct bq24257_state {
@@ -206,6 +207,13 @@ static const u32 bq24257_vovp_map[] = {
#define BQ24257_VOVP_MAP_SIZE ARRAY_SIZE(bq24257_vovp_map)
+static const u32 bq24257_vindpm_map[] = {
+ 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
+ 4760000
+};
+
+#define BQ24257_VINDPM_MAP_SIZE ARRAY_SIZE(bq24257_vindpm_map)
+
static int bq24257_field_read(struct bq24257_device *bq,
enum bq24257_fields field_id)
{
@@ -432,6 +440,17 @@ enum bq24257_vovp {
VOVP_10500
};
+enum bq24257_vindpm {
+ VINDPM_4200,
+ VINDPM_4280,
+ VINDPM_4360,
+ VINDPM_4440,
+ VINDPM_4520,
+ VINDPM_4600,
+ VINDPM_4680,
+ VINDPM_4760
+};
+
enum bq24257_port_type {
PORT_TYPE_DCP, /* Dedicated Charging Port */
PORT_TYPE_CDP, /* Charging Downstream Port */
@@ -615,6 +634,7 @@ static int bq24257_hw_init(struct bq24257_device *bq)
{F_VBAT, bq->init_data.vbat},
{F_ITERM, bq->init_data.iterm},
{F_VOVP, bq->init_data.vovp},
+ {F_VINDPM, bq->init_data.vindpm},
};
/*
@@ -648,6 +668,7 @@ static int bq24257_hw_init(struct bq24257_device *bq)
/* program fixed input current limit */
ret = bq24257_field_write(bq, F_IILIMIT,
bq->init_data.in_ilimit);
+
if (ret < 0)
return ret;
} else if (!state.power_good)
@@ -695,10 +716,23 @@ static ssize_t bq24257_show_ovp_voltage(struct device *dev,
bq24257_vovp_map[bq->init_data.vovp]);
}
+static ssize_t bq24257_show_in_dpm_voltage(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct bq24257_device *bq = power_supply_get_drvdata(psy);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ bq24257_vindpm_map[bq->init_data.vindpm]);
+}
+
static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL);
+static DEVICE_ATTR(in_dpm_voltage, S_IRUGO, bq24257_show_in_dpm_voltage, NULL);
static struct attribute *bq24257_charger_attr[] = {
&dev_attr_ovp_voltage.attr,
+ &dev_attr_in_dpm_voltage.attr,
NULL,
};
@@ -801,6 +835,16 @@ static int bq24257_fw_probe(struct bq24257_device *bq)
bq24257_vovp_map,
BQ24257_VOVP_MAP_SIZE);
+ ret = device_property_read_u32(bq->dev, "ti,in-dpm-voltage",
+ &property);
+ if (ret < 0)
+ bq->init_data.vindpm = VINDPM_4360;
+ else
+ bq->init_data.vindpm =
+ bq24257_find_idx(property,
+ bq24257_vindpm_map,
+ BQ24257_VINDPM_MAP_SIZE);
+
return 0;
}
--
1.9.1
next prev parent reply other threads:[~2015-09-11 20:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-11 20:26 [PATCH v3 00/10] power: bq24257: Add support for bq24250/bq24251 Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 01/10] dt: power: bq24257-charger: Cover additional devices Andreas Dannenberg
2015-09-14 6:11 ` Krzysztof Kozlowski
2015-09-14 13:54 ` Andreas Dannenberg
2015-09-15 7:56 ` Krzysztof Kozlowski
2015-09-15 9:05 ` Laurentiu Palcu
2015-09-15 12:51 ` Krzysztof Kozlowski
2015-09-15 13:57 ` Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 03/10] power: bq24257: Add bit definition for temp sense enable Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 04/10] power: bq24257: Allow manual setting of input current limit Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 05/10] power: bq24257: Add SW-based approach for Power Good determination Andreas Dannenberg
[not found] ` <1442003202-1430-1-git-send-email-dannenberg-l0cyMroinI0@public.gmane.org>
2015-09-11 20:26 ` [PATCH v3 02/10] power: bq24257: Add basic support for bq24250/bq24251 Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 06/10] power: bq24257: Add over voltage protection setting support Andreas Dannenberg
2015-09-11 20:26 ` Andreas Dannenberg [this message]
2015-09-11 20:26 ` [PATCH v3 08/10] power: bq24257: Allow input current limit sysfs access Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 09/10] power: bq24257: Add various device-specific sysfs properties Andreas Dannenberg
2015-09-11 20:26 ` [PATCH v3 10/10] power: bq24257: Add platform data based initialization Andreas Dannenberg
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