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Groups > linux.kernel > #1469906
| From | Wenyou Yang <wenyou.yang@atmel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v8 08/11] power: act8945a_charger: Add max current property |
| Date | 2016-08-25 09:30 +0200 |
| Message-ID | <s9XgS-6iK-41@gated-at.bofh.it> (permalink) |
| References | <s9XgR-6iK-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Add the power supply's current max property,
POWER_SUPPLY_PROP_CURRENT_MAX.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
---
Changes in v8:
- As the act8945a_charger is regarded as a sub-device, all
properties can be achieved from its own device node,
use devm_gpiod_get() properly as well to get "chglev-gpios".
- Add missing return -EPROBE_DEFER for "chglev-gpios".
Changes in v7:
- For "chglev-gpios", use gpiod_get() to fix devm_gpiod_get() wrong use
with parent device as *dev argument.
- Add the handle -EPROBE_DEFER returned from gpiod_get "chglev-gpio".
- Remove unneeded semicolon.
Changes in v6:
- For "chglev-gpios", use gpiod API instead of old gpio API to handle.
Changes in v5: None
Changes in v4:
- Fix wrong gpio assignment for chglev_pin.
Changes in v3: None
Changes in v2: None
drivers/power/supply/act8945a_charger.c | 90 +++++++++++++++++++++++++++++----
1 file changed, 81 insertions(+), 9 deletions(-)
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c
index b66b023..d6263e9 100644
--- a/drivers/power/supply/act8945a_charger.c
+++ b/drivers/power/supply/act8945a_charger.c
@@ -13,7 +13,6 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
@@ -85,6 +84,7 @@ struct act8945a_charger {
bool init_done;
struct gpio_desc *lbo_gpio;
+ struct gpio_desc *chglev_gpio;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@@ -265,12 +265,80 @@ static int act8945a_get_capacity_level(struct act8945a_charger *charger,
return 0;
}
+#define MAX_CURRENT_USB_HIGH 450000
+#define MAX_CURRENT_USB_LOW 90000
+#define MAX_CURRENT_USB_PRE 45000
+/*
+ * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
+ * Riset = 2.43K
+ */
+#define MAX_CURRENT_AC_HIGH 886527
+#define MAX_CURRENT_AC_LOW 117305
+#define MAX_CURRENT_AC_HIGH_PRE 88653
+#define MAX_CURRENT_AC_LOW_PRE 11731
+
+static int act8945a_get_current_max(struct act8945a_charger *charger,
+ struct regmap *regmap, int *val)
+{
+ int ret;
+ unsigned int status, state;
+ unsigned int acin_state;
+ int chgin_level = gpiod_get_value(charger->chglev_gpio);
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
+ if (ret < 0)
+ return ret;
+
+ acin_state = (state & APCH_STATE_ACINSTAT) >> 1;
+
+ state &= APCH_STATE_CSTATE;
+ state >>= APCH_STATE_CSTATE_SHIFT;
+
+ switch (state) {
+ case APCH_STATE_CSTATE_PRE:
+ if (acin_state) {
+ if (chgin_level)
+ *val = MAX_CURRENT_AC_HIGH_PRE;
+ else
+ *val = MAX_CURRENT_AC_LOW_PRE;
+ } else {
+ *val = MAX_CURRENT_USB_PRE;
+ }
+ break;
+ case APCH_STATE_CSTATE_FAST:
+ if (acin_state) {
+ if (chgin_level)
+ *val = MAX_CURRENT_AC_HIGH;
+ else
+ *val = MAX_CURRENT_AC_LOW;
+ } else {
+ if (chgin_level)
+ *val = MAX_CURRENT_USB_HIGH;
+ else
+ *val = MAX_CURRENT_USB_LOW;
+ }
+ break;
+ case APCH_STATE_CSTATE_EOC:
+ case APCH_STATE_CSTATE_DISABLED:
+ default:
+ *val = 0;
+ break;
+ }
+
+ return 0;
+}
+
static enum power_supply_property act8945a_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER
};
@@ -300,6 +368,10 @@ static int act8945a_charger_get_property(struct power_supply *psy,
ret = act8945a_get_capacity_level(charger,
regmap, &val->intval);
break;
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ ret = act8945a_get_current_max(charger,
+ regmap, &val->intval);
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = act8945a_charger_model;
break;
@@ -390,13 +462,11 @@ static int act8945a_charger_config(struct device *dev,
struct act8945a_charger *charger)
{
struct device_node *np = dev->of_node;
- enum of_gpio_flags flags;
struct regmap *regmap = charger->regmap;
u32 total_time_out;
u32 pre_time_out;
u32 input_voltage_threshold;
- int chglev_pin;
int ret;
unsigned int tmp;
@@ -432,12 +502,14 @@ static int act8945a_charger_config(struct device *dev,
if (ret)
dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");
- chglev_pin = of_get_named_gpio_flags(np,
- "active-semi,chglev-gpios", 0, &flags);
-
- if (gpio_is_valid(chglev_pin)) {
- gpio_set_value(chglev_pin,
- ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
+ charger->chglev_gpio = devm_gpiod_get(dev,
+ "active-semi,chglev", GPIOD_IN);
+ if (PTR_ERR(charger->chglev_gpio) == -EPROBE_DEFER) {
+ dev_info(dev, "probe retry requested for gpio \"chglev\"\n");
+ return -EPROBE_DEFER;
+ } else if (IS_ERR(charger->chglev_gpio)) {
+ dev_err(dev, "unable to claim gpio \"chglev\"\n");
+ charger->chglev_gpio = NULL;
}
if (of_property_read_u32(np,
--
2.7.4
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v8 00/11] power: act8945a_charger: Improvements Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
[PATCH v8 03/11] power: act8945a_charger: Remove "battery_temperature" Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 03/11] power: act8945a_charger: Remove "battery_temperature" Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 02/11] power: act8945a_charger: Achieve properties from its node Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 02/11] power: act8945a_charger: Achieve properties from its node Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 05/11] power: act8945a_charger: Add status change update support Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 05/11] power: act8945a_charger: Add status change update support Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 04/11] power: act8945a_charger: Improve Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 04/11] power: act8945a_charger: Improve Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 06/11] power: act8945a_charger: Fix the power supply type Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 06/11] power: act8945a_charger: Fix the power supply type Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 08/11] power: act8945a_charger: Add max current property Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 08/11] power: act8945a_charger: Add max current property Sebastian Reichel <sre@kernel.org> - 2016-08-31 17:00 +0200
[PATCH v8 07/11] power: act8945a_charger: Add capacity level property Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:30 +0200
Re: [PATCH v8 07/11] power: act8945a_charger: Add capacity level property Sebastian Reichel <sre@kernel.org> - 2016-08-31 17:00 +0200
[PATCH v8 09/11] doc: bindings: mfd: act8945a: Update the example Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:50 +0200
Re: [PATCH v8 09/11] doc: bindings: mfd: act8945a: Update the example Rob Herring <robh@kernel.org> - 2016-08-30 22:00 +0200
Re: [PATCH v8 09/11] doc: bindings: mfd: act8945a: Update the example Sebastian Reichel <sre@kernel.org> - 2016-08-31 17:00 +0200
[PATCH v8 10/11] doc: bindings: power: act8945a-charger: Update properties. Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:50 +0200
Re: [PATCH v8 10/11] doc: bindings: power: act8945a-charger: Update properties. Sebastian Reichel <sre@kernel.org> - 2016-08-31 16:50 +0200
[PATCH v8 11/11] ARM: at91/dt: sama5d2_xplained: Add act8945a-charger node. Wenyou Yang <wenyou.yang@atmel.com> - 2016-08-25 09:50 +0200
Re: [PATCH v8 00/11] power: act8945a_charger: Improvements Mark Brown <broonie@kernel.org> - 2016-08-25 11:50 +0200
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