mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 21:36:42 +07:00
4e34025b34
With the switch to devm, there is no need for ad7879_probe() to return the
touchscreen structure, we can use plain error code. This also fixes issue
introduced with devm concersion, where we returned 0 on success (which
worked OK since IS_ERR(0) would not trigger, but was not correct
regardless).
Fixes: 381f688eee3d ("Input: ad7879 - use more devm interfaces")
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
|
|
* AD7879/AD7889 touchscreen (SPI bus)
|
|
*
|
|
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/input.h> /* BUS_SPI */
|
|
#include <linux/pm.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "ad7879.h"
|
|
|
|
#define AD7879_DEVID 0x7A /* AD7879/AD7889 */
|
|
|
|
#define MAX_SPI_FREQ_HZ 5000000
|
|
|
|
#define AD7879_CMD_MAGIC 0xE0
|
|
#define AD7879_CMD_READ BIT(2)
|
|
|
|
static const struct regmap_config ad7879_spi_regmap_config = {
|
|
.reg_bits = 16,
|
|
.val_bits = 16,
|
|
.max_register = 15,
|
|
.read_flag_mask = AD7879_CMD_MAGIC | AD7879_CMD_READ,
|
|
.write_flag_mask = AD7879_CMD_MAGIC,
|
|
};
|
|
|
|
static int ad7879_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct regmap *regmap;
|
|
|
|
/* don't exceed max specified SPI CLK frequency */
|
|
if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
|
|
dev_err(&spi->dev, "SPI CLK %d Hz?\n", spi->max_speed_hz);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap = devm_regmap_init_spi(spi, &ad7879_spi_regmap_config);
|
|
if (IS_ERR(regmap))
|
|
return PTR_ERR(regmap);
|
|
|
|
return ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id ad7879_spi_dt_ids[] = {
|
|
{ .compatible = "adi,ad7879", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ad7879_spi_dt_ids);
|
|
#endif
|
|
|
|
static struct spi_driver ad7879_spi_driver = {
|
|
.driver = {
|
|
.name = "ad7879",
|
|
.pm = &ad7879_pm_ops,
|
|
.of_match_table = of_match_ptr(ad7879_spi_dt_ids),
|
|
},
|
|
.probe = ad7879_spi_probe,
|
|
};
|
|
|
|
module_spi_driver(ad7879_spi_driver);
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
|
|
MODULE_DESCRIPTION("AD7879(-1) touchscreen SPI bus driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("spi:ad7879");
|