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

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commit f804bd0dc28683a93a60f271aaefb2fc5b0853dd 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
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@ -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;