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iio:adc:twl6030: Enable measurements of VUSB, VBAT and others 

commit f804bd0dc2 upstream.

Some inputs need to be wired up to produce proper measurements,
without this change only near zero values are reported.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Fixes: 1696f36482 ("iio: twl6030-gpadc: TWL6030, TWL6032 GPADC driver")
Link: https://lore.kernel.org/r/20221201181635.3522962-1-andreas@kemnade.info
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Kemnade 2022-12-01 19:16:35 +01:00 committed by Greg Kroah-Hartman
parent e05b41391a
commit 9303511481
1 changed files with 32 additions and 0 deletions
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32
drivers/iio/adc/twl6030-gpadc.c
View File

@ -57,6 +57,18 @@
#define TWL6030_GPADCS BIT(1)
#define TWL6030_GPADCR BIT(0)
#define USB_VBUS_CTRL_SET 0x04
#define USB_ID_CTRL_SET 0x06
#define TWL6030_MISC1 0xE4
#define VBUS_MEAS 0x01
#define ID_MEAS 0x01
#define VAC_MEAS 0x04
#define VBAT_MEAS 0x02
#define BB_MEAS 0x01
/**
* struct twl6030_chnl_calib - channel calibration
* @gain: slope coefficient for ideal curve
@ -927,6 +939,26 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
return ret;
}
ret = twl_i2c_write_u8(TWL_MODULE_USB, VBUS_MEAS, USB_VBUS_CTRL_SET);
if (ret < 0) {
dev_err(dev, "failed to wire up inputs\n");
return ret;
}
ret = twl_i2c_write_u8(TWL_MODULE_USB, ID_MEAS, USB_ID_CTRL_SET);
if (ret < 0) {
dev_err(dev, "failed to wire up inputs\n");
return ret;
}
ret = twl_i2c_write_u8(TWL6030_MODULE_ID0,
VBAT_MEAS | BB_MEAS | BB_MEAS,
TWL6030_MISC1);
if (ret < 0) {
dev_err(dev, "failed to wire up inputs\n");
return ret;
}
indio_dev->name = DRIVER_NAME;
indio_dev->info = &twl6030_gpadc_iio_info;
indio_dev->modes = INDIO_DIRECT_MODE;