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Message-ID: <20200930135048.11530-5-alexandru.ardelean@analog.com>
Date: Wed, 30 Sep 2020 16:50:48 +0300
From: Alexandru Ardelean <alexandru.ardelean@...log.com>
To: <linux-iio@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
CC: <linux-kernel@...r.kernel.org>, <jic23@...nel.org>,
<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
<ludovic.desroches@...rochip.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH v4 4/4] iio: adc: at91_adc: remove platform data and move defs in driver file
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@...log.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
+ * @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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