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power: supply: ab8500_charger: Convert to IIO ADC 

This switches the AB8500 battery charger driver to using
the standard IIO ADC channel lookup and conversion routines.

Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Linus Walleij 2019-10-11 09:18:00 +02:00 committed by Jonathan Cameron
parent 0a8686e309
commit 97ab78bac5
1 changed files with 58 additions and 20 deletions
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78
drivers/power/supply/ab8500_charger.c
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@ -29,10 +29,10 @@
#include <linux/mfd/abx500/ab8500.h> #include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500.h> #include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500-bm.h> #include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/abx500/ab8500-gpadc.h>
#include <linux/mfd/abx500/ux500_chargalg.h> #include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/usb/otg.h> #include <linux/usb/otg.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/iio/consumer.h>
/* Charger constants */ /* Charger constants */
#define NO_PW_CONN 0 #define NO_PW_CONN 0
@ -233,7 +233,10 @@ struct ab8500_charger_max_usb_in_curr {
* @current_stepping_sessions: * @current_stepping_sessions:
* Counter for current stepping sessions * Counter for current stepping sessions
* @parent: Pointer to the struct ab8500 * @parent: Pointer to the struct ab8500
* @gpadc: Pointer to the struct gpadc * @adc_main_charger_v ADC channel for main charger voltage
* @adc_main_charger_c ADC channel for main charger current
* @adc_vbus_v ADC channel for USB charger voltage
* @adc_usb_charger_c ADC channel for USB charger current
* @bm: Platform specific battery management information * @bm: Platform specific battery management information
* @flags: Structure for information about events triggered * @flags: Structure for information about events triggered
* @usb_state: Structure for usb stack information * @usb_state: Structure for usb stack information
@ -283,7 +286,10 @@ struct ab8500_charger {
int is_aca_rid; int is_aca_rid;
atomic_t current_stepping_sessions; atomic_t current_stepping_sessions;
struct ab8500 *parent; struct ab8500 *parent;
struct ab8500_gpadc *gpadc; struct iio_channel *adc_main_charger_v;
struct iio_channel *adc_main_charger_c;
struct iio_channel *adc_vbus_v;
struct iio_channel *adc_usb_charger_c;
struct abx500_bm_data *bm; struct abx500_bm_data *bm;
struct ab8500_charger_event_flags flags; struct ab8500_charger_event_flags flags;
struct ab8500_charger_usb_state usb_state; struct ab8500_charger_usb_state usb_state;
@ -459,13 +465,13 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
*/ */
static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
{ {
int vch; int vch, ret;
/* Only measure voltage if the charger is connected */ /* Only measure voltage if the charger is connected */
if (di->ac.charger_connected) { if (di->ac.charger_connected) {
vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V); ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
if (vch < 0) if (ret < 0)
dev_err(di->dev, "%s gpadc conv failed,\n", __func__); dev_err(di->dev, "%s ADC conv failed,\n", __func__);
} else { } else {
vch = 0; vch = 0;
} }
@ -510,13 +516,13 @@ static int ab8500_charger_ac_cv(struct ab8500_charger *di)
*/ */
static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
{ {
int vch; int vch, ret;
/* Only measure voltage if the charger is connected */ /* Only measure voltage if the charger is connected */
if (di->usb.charger_connected) { if (di->usb.charger_connected) {
vch = ab8500_gpadc_convert(di->gpadc, VBUS_V); ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
if (vch < 0) if (ret < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__); dev_err(di->dev, "%s ADC conv failed,\n", __func__);
} else { } else {
vch = 0; vch = 0;
} }
@ -532,13 +538,13 @@ static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
*/ */
static int ab8500_charger_get_usb_current(struct ab8500_charger *di) static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
{ {
int ich; int ich, ret;
/* Only measure current if the charger is online */ /* Only measure current if the charger is online */
if (di->usb.charger_online) { if (di->usb.charger_online) {
ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C); ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
if (ich < 0) if (ret < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__); dev_err(di->dev, "%s ADC conv failed,\n", __func__);
} else { } else {
ich = 0; ich = 0;
} }
@ -554,13 +560,13 @@ static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
*/ */
static int ab8500_charger_get_ac_current(struct ab8500_charger *di) static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
{ {
int ich; int ich, ret;
/* Only measure current if the charger is online */ /* Only measure current if the charger is online */
if (di->ac.charger_online) { if (di->ac.charger_online) {
ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C); ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
if (ich < 0) if (ret < 0)
dev_err(di->dev, "%s gpadc conv failed\n", __func__); dev_err(di->dev, "%s ADC conv failed,\n", __func__);
} else { } else {
ich = 0; ich = 0;
} }
@ -3371,7 +3377,39 @@ static int ab8500_charger_probe(struct platform_device *pdev)
/* get parent data */ /* get parent data */
di->dev = &pdev->dev; di->dev = &pdev->dev;
di->parent = dev_get_drvdata(pdev->dev.parent); di->parent = dev_get_drvdata(pdev->dev.parent);
di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
/* Get ADC channels */
di->adc_main_charger_v = devm_iio_channel_get(&pdev->dev,
"main_charger_v");
if (IS_ERR(di->adc_main_charger_v)) {
if (PTR_ERR(di->adc_main_charger_v) == -ENODEV)
return -EPROBE_DEFER;
dev_err(&pdev->dev, "failed to get ADC main charger voltage\n");
return PTR_ERR(di->adc_main_charger_v);
}
di->adc_main_charger_c = devm_iio_channel_get(&pdev->dev,
"main_charger_c");
if (IS_ERR(di->adc_main_charger_c)) {
if (PTR_ERR(di->adc_main_charger_c) == -ENODEV)
return -EPROBE_DEFER;
dev_err(&pdev->dev, "failed to get ADC main charger current\n");
return PTR_ERR(di->adc_main_charger_v);
}
di->adc_vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
if (IS_ERR(di->adc_vbus_v)) {
if (PTR_ERR(di->adc_vbus_v) == -ENODEV)
return -EPROBE_DEFER;
dev_err(&pdev->dev, "failed to get ADC USB charger voltage\n");
return PTR_ERR(di->adc_vbus_v);
}
di->adc_usb_charger_c = devm_iio_channel_get(&pdev->dev,
"usb_charger_c");
if (IS_ERR(di->adc_usb_charger_c)) {
if (PTR_ERR(di->adc_usb_charger_c) == -ENODEV)
return -EPROBE_DEFER;
dev_err(&pdev->dev, "failed to get ADC USB charger current\n");
return PTR_ERR(di->adc_usb_charger_c);
}
/* initialize lock */ /* initialize lock */
spin_lock_init(&di->usb_state.usb_lock); spin_lock_init(&di->usb_state.usb_lock);