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Input: ads7846 - remove custom filter handling functions from pdata

Browse source 
The functions in the platform data struct to initialize, cleanup and
apply custom filters are not in use by any mainline board.

Remove support for them to pave the road for more cleanups to come.

The enum was moved as it has no users outside of the driver code
itself.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.kernel.org/r/20210907200726.2034962-3-daniel@zonque.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Daniel Mack 2021-09-09 18:01:28 -07:00 committed by Dmitry Torokhov
parent de609b56b8
commit 937f5d5ec6
2 changed files with 8 additions and 32 deletions
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25
drivers/input/touchscreen/ads7846.c
View file

@ -142,13 +142,18 @@ struct ads7846 {
int (*filter)(void *data, int data_idx, int *val);
void *filter_data;
void (*filter_cleanup)(void *data);
int (*get_pendown_state)(void);
int gpio_pendown;
void (*wait_for_sync)(void);
};
enum ads7846_filter {
ADS7846_FILTER_OK,
ADS7846_FILTER_REPEAT,
ADS7846_FILTER_IGNORE,
};
/* leave chip selected when we're done, for quicker re-select? */
#if 0
#define CS_CHANGE(xfer) ((xfer).cs_change = 1)
@ -1277,15 +1282,7 @@ static int ads7846_probe(struct spi_device *spi)
ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
ts->vref_mv = pdata->vref_mv;
if (pdata->filter != NULL) {
if (pdata->filter_init != NULL) {
err = pdata->filter_init(pdata, &ts->filter_data);
if (err < 0)
goto err_free_mem;
}
ts->filter = pdata->filter;
ts->filter_cleanup = pdata->filter_cleanup;
} else if (pdata->debounce_max) {
if (pdata->debounce_max) {
ts->debounce_max = pdata->debounce_max;
if (ts->debounce_max < 2)
ts->debounce_max = 2;
@ -1299,7 +1296,7 @@ static int ads7846_probe(struct spi_device *spi)
err = ads7846_setup_pendown(spi, ts, pdata);
if (err)
goto err_cleanup_filter;
goto err_free_mem;
if (pdata->penirq_recheck_delay_usecs)
ts->penirq_recheck_delay_usecs =
@ -1425,9 +1422,6 @@ static int ads7846_probe(struct spi_device *spi)
err_free_gpio:
if (!ts->get_pendown_state)
gpio_free(ts->gpio_pendown);
err_cleanup_filter:
if (ts->filter_cleanup)
ts->filter_cleanup(ts->filter_data);
err_free_mem:
input_free_device(input_dev);
kfree(packet);
@ -1458,9 +1452,6 @@ static int ads7846_remove(struct spi_device *spi)
gpio_free(ts->gpio_pendown);
}
if (ts->filter_cleanup)
ts->filter_cleanup(ts->filter_data);
kfree(ts->packet);
kfree(ts);

15
include/linux/spi/ads7846.h
View file

@ -1,17 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* linux/spi/ads7846.h */
/* Touchscreen characteristics vary between boards and models. The
* platform_data for the device's "struct device" holds this information.
*
* It's OK if the min/max values are zero.
*/
enum ads7846_filter {
ADS7846_FILTER_OK,
ADS7846_FILTER_REPEAT,
ADS7846_FILTER_IGNORE,
};
struct ads7846_platform_data {
u16 model; /* 7843, 7845, 7846, 7873. */
u16 vref_delay_usecs; /* 0 for external vref; etc */
@ -51,10 +40,6 @@ struct ads7846_platform_data {
int gpio_pendown_debounce; /* platform specific debounce time for
* the gpio_pendown */
int (*get_pendown_state)(void);
int (*filter_init) (const struct ads7846_platform_data *pdata,
void **filter_data);
int (*filter) (void *filter_data, int data_idx, int *val);
void (*filter_cleanup)(void *filter_data);
void (*wait_for_sync)(void);
bool wakeup;
unsigned long irq_flags;