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