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SubjectRe: [PATCH v4 4/4] iio: adc: at91_adc: remove platform data and move defs in driver file
On Wed, 30 Sep 2020 16:05:55 +0200
Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:

> On 30/09/2020 16:50:48+0300, Alexandru Ardelean wrote:
> > The AT91 ADC driver no longer uses the 'at91_add_device_adc' platform data
> > type. This is no longer used (at least in mainline boards).
> >
> > This change removes the platform-data initialization from the driver, since
> > it is mostly dead code now.
> >
> > Some definitions [from the platform data at91_adc.h include] have been
> > moved in the driver, since they are needed in the driver.
> >
> > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
>
> > ---
> > drivers/iio/adc/at91_adc.c | 60 ++++++++++----------------
> > include/linux/platform_data/at91_adc.h | 49 ---------------------
> > 2 files changed, 22 insertions(+), 87 deletions(-)
> > delete mode 100644 include/linux/platform_data/at91_adc.h
> >
> > diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> > index 473bffe84fbd..be6abf739881 100644
> > --- a/drivers/iio/adc/at91_adc.c
> > +++ b/drivers/iio/adc/at91_adc.c
> > @@ -22,8 +22,6 @@
> > #include <linux/slab.h>
> > #include <linux/wait.h>
> >
> > -#include <linux/platform_data/at91_adc.h>
> > -
> > #include <linux/iio/iio.h>
> > #include <linux/iio/buffer.h>
> > #include <linux/iio/trigger.h>
> > @@ -153,6 +151,25 @@
> > #define TOUCH_SHTIM 0xa
> > #define TOUCH_SCTIM_US 10 /* 10us for the Touchscreen Switches Closure Time */
> >
> > +enum atmel_adc_ts_type {
> > + ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> > + ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> > + ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> > +};
> > +
> > +/**
> > + * struct at91_adc_trigger - description of triggers
> > + * @name: name of the trigger advertised to the user
> > + * @value: value to set in the ADC's trigger setup register
> > + to enable the trigger
Build with W=1 (and hence kernel doc checks) picked up missing *
on this line.

Fixed.

Jonathan

> > + * @is_external: Does the trigger rely on an external pin?
> > + */
> > +struct at91_adc_trigger {
> > + const char *name;
> > + u8 value;
> > + bool is_external;
> > +};
> > +
> > /**
> > * struct at91_adc_reg_desc - Various informations relative to registers
> > * @channel_base: Base offset for the channel data registers
> > @@ -873,9 +890,6 @@ static int at91_adc_probe_dt(struct iio_dev *idev,
> > int i = 0, ret;
> > u32 prop;
> >
> > - if (!node)
> > - return -EINVAL;
> > -
> > st->caps = of_device_get_match_data(&pdev->dev);
> >
> > st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers");
> > @@ -957,30 +971,6 @@ static int at91_adc_probe_dt(struct iio_dev *idev,
> > return ret;
> > }
> >
> > -static int at91_adc_probe_pdata(struct at91_adc_state *st,
> > - struct platform_device *pdev)
> > -{
> > - struct at91_adc_data *pdata = pdev->dev.platform_data;
> > -
> > - if (!pdata)
> > - return -EINVAL;
> > -
> > - st->caps = (struct at91_adc_caps *)
> > - platform_get_device_id(pdev)->driver_data;
> > -
> > - st->use_external = pdata->use_external_triggers;
> > - st->vref_mv = pdata->vref;
> > - st->channels_mask = pdata->channels_used;
> > - st->num_channels = st->caps->num_channels;
> > - st->startup_time = pdata->startup_time;
> > - st->trigger_number = pdata->trigger_number;
> > - st->trigger_list = pdata->trigger_list;
> > - st->registers = &st->caps->registers;
> > - st->touchscreen_type = pdata->touchscreen_type;
> > -
> > - return 0;
> > -}
> > -
> > static const struct iio_info at91_adc_info = {
> > .read_raw = &at91_adc_read_raw,
> > };
> > @@ -1157,15 +1147,9 @@ static int at91_adc_probe(struct platform_device *pdev)
> >
> > st = iio_priv(idev);
> >
> > - if (pdev->dev.of_node)
> > - ret = at91_adc_probe_dt(idev, pdev);
> > - else
> > - ret = at91_adc_probe_pdata(st, pdev);
> > -
> > - if (ret) {
> > - dev_err(&pdev->dev, "No platform data available.\n");
> > - return -EINVAL;
> > - }
> > + ret = at91_adc_probe_dt(idev, pdev);
> > + if (ret)
> > + return ret;
> >
> > platform_set_drvdata(pdev, idev);
> >
> > diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h
> > deleted file mode 100644
> > index f20eaeb827ce..000000000000
> > --- a/include/linux/platform_data/at91_adc.h
> > +++ /dev/null
> > @@ -1,49 +0,0 @@
> > -/* SPDX-License-Identifier: GPL-2.0-or-later */
> > -/*
> > - * Copyright (C) 2011 Free Electrons
> > - */
> > -
> > -#ifndef _AT91_ADC_H_
> > -#define _AT91_ADC_H_
> > -
> > -enum atmel_adc_ts_type {
> > - ATMEL_ADC_TOUCHSCREEN_NONE = 0,
> > - ATMEL_ADC_TOUCHSCREEN_4WIRE = 4,
> > - ATMEL_ADC_TOUCHSCREEN_5WIRE = 5,
> > -};
> > -
> > -/**
> > - * struct at91_adc_trigger - description of triggers
> > - * @name: name of the trigger advertised to the user
> > - * @value: value to set in the ADC's trigger setup register
> > - to enable the trigger
> > - * @is_external: Does the trigger rely on an external pin?
> > - */
> > -struct at91_adc_trigger {
> > - const char *name;
> > - u8 value;
> > - bool is_external;
> > -};
> > -
> > -/**
> > - * struct at91_adc_data - platform data for ADC driver
> > - * @channels_used: channels in use on the board as a bitmask
> > - * @startup_time: startup time of the ADC in microseconds
> > - * @trigger_list: Triggers available in the ADC
> > - * @trigger_number: Number of triggers available in the ADC
> > - * @use_external_triggers: does the board has external triggers availables
> > - * @vref: Reference voltage for the ADC in millivolts
> > - * @touchscreen_type: If a touchscreen is connected, its type (4 or 5 wires)
> > - */
> > -struct at91_adc_data {
> > - unsigned long channels_used;
> > - u8 startup_time;
> > - struct at91_adc_trigger *trigger_list;
> > - u8 trigger_number;
> > - bool use_external_triggers;
> > - u16 vref;
> > - enum atmel_adc_ts_type touchscreen_type;
> > -};
> > -
> > -extern void __init at91_add_device_adc(struct at91_adc_data *data);
> > -#endif
> > --
> > 2.17.1
> >
>

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