Hi,
On Wed, Jan 11, 2017 at 12:47:40AM +0100, Linus Walleij wrote:
> This switches the AB8500 battery charger driver to using
> the standard IIO ADC channel lookup and conversion routines.
>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Acked-By: Sebastian Reichel <sre@xxxxxxxxxx>
-- Sebastian
> drivers/power/supply/ab8500_charger.c | 78 ++++++++++++++++++++++++++---------
> 1 file changed, 58 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
> index 5cee9aa87aa3..c1c4873899e9 100644
> --- a/drivers/power/supply/ab8500_charger.c
> +++ b/drivers/power/supply/ab8500_charger.c
> @@ -29,10 +29,10 @@
> #include <linux/mfd/abx500/ab8500.h>
> #include <linux/mfd/abx500.h>
> #include <linux/mfd/abx500/ab8500-bm.h>
> -#include <linux/mfd/abx500/ab8500-gpadc.h>
> #include <linux/mfd/abx500/ux500_chargalg.h>
> #include <linux/usb/otg.h>
> #include <linux/mutex.h>
> +#include <linux/iio/consumer.h>
>
> /* Charger constants */
> #define NO_PW_CONN 0
> @@ -235,7 +235,10 @@ struct ab8500_charger_max_usb_in_curr {
> * @current_stepping_sessions:
> * Counter for current stepping sessions
> * @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
> * @flags: Structure for information about events triggered
> * @usb_state: Structure for usb stack information
> @@ -285,7 +288,10 @@ struct ab8500_charger {
> int is_aca_rid;
> atomic_t current_stepping_sessions;
> 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 ab8500_charger_event_flags flags;
> struct ab8500_charger_usb_state usb_state;
> @@ -461,13 +467,13 @@ static void ab8500_charger_set_usb_connected(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 */
> if (di->ac.charger_connected) {
> - vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
> - if (vch < 0)
> - dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
> + ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
> + if (ret < 0)
> + dev_err(di->dev, "%s ADC conv failed,\n", __func__);
> } else {
> vch = 0;
> }
> @@ -512,13 +518,13 @@ static int ab8500_charger_ac_cv(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 */
> if (di->usb.charger_connected) {
> - vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
> - if (vch < 0)
> - dev_err(di->dev, "%s gpadc conv failed\n", __func__);
> + ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
> + if (ret < 0)
> + dev_err(di->dev, "%s ADC conv failed,\n", __func__);
> } else {
> vch = 0;
> }
> @@ -534,13 +540,13 @@ static int ab8500_charger_get_vbus_voltage(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 */
> if (di->usb.charger_online) {
> - ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
> - if (ich < 0)
> - dev_err(di->dev, "%s gpadc conv failed\n", __func__);
> + ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
> + if (ret < 0)
> + dev_err(di->dev, "%s ADC conv failed,\n", __func__);
> } else {
> ich = 0;
> }
> @@ -556,13 +562,13 @@ static int ab8500_charger_get_usb_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 */
> if (di->ac.charger_online) {
> - ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
> - if (ich < 0)
> - dev_err(di->dev, "%s gpadc conv failed\n", __func__);
> + ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
> + if (ret < 0)
> + dev_err(di->dev, "%s ADC conv failed,\n", __func__);
> } else {
> ich = 0;
> }
> @@ -3485,7 +3491,39 @@ static int ab8500_charger_probe(struct platform_device *pdev)
> /* get parent data */
> di->dev = &pdev->dev;
> 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 */
> spin_lock_init(&di->usb_state.usb_lock);
> --
> 2.9.3
>
> --
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