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4df4946d26
Up to now lis3lv02d_remove_fs() returns zero unconditionally. Make it return void instead which makes it easier to see in the callers that there is no error to handle. Also the return value of i2c and spi remove callbacks is ignored anyway. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20211012153945.2651412-13-u.kleine-koenig@pengutronix.de Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* lis3lv02d_spi - SPI glue layer for lis3lv02d
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/spi/spi.h>
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#include <linux/pm.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/of_device.h>
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#include "lis3lv02d.h"
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#define DRV_NAME "lis3lv02d_spi"
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#define LIS3_SPI_READ 0x80
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static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
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{
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struct spi_device *spi = lis3->bus_priv;
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int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
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if (ret < 0)
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return -EINVAL;
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*v = (u8) ret;
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return 0;
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}
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static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
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{
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u8 tmp[2] = { reg, val };
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struct spi_device *spi = lis3->bus_priv;
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return spi_write(spi, tmp, sizeof(tmp));
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}
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static int lis3_spi_init(struct lis3lv02d *lis3)
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{
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u8 reg;
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int ret;
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/* power up the device */
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ret = lis3->read(lis3, CTRL_REG1, ®);
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if (ret < 0)
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return ret;
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reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
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return lis3->write(lis3, CTRL_REG1, reg);
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}
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static union axis_conversion lis3lv02d_axis_normal =
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{ .as_array = { 1, 2, 3 } };
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#ifdef CONFIG_OF
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static const struct of_device_id lis302dl_spi_dt_ids[] = {
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{ .compatible = "st,lis302dl-spi" },
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{}
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};
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MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
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#endif
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static int lis302dl_spi_probe(struct spi_device *spi)
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{
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int ret;
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spi->bits_per_word = 8;
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spi->mode = SPI_MODE_0;
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ret = spi_setup(spi);
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if (ret < 0)
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return ret;
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lis3_dev.bus_priv = spi;
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lis3_dev.init = lis3_spi_init;
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lis3_dev.read = lis3_spi_read;
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lis3_dev.write = lis3_spi_write;
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lis3_dev.irq = spi->irq;
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lis3_dev.ac = lis3lv02d_axis_normal;
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lis3_dev.pdata = spi->dev.platform_data;
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#ifdef CONFIG_OF
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if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
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lis3_dev.of_node = spi->dev.of_node;
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ret = lis3lv02d_init_dt(&lis3_dev);
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if (ret)
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return ret;
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}
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#endif
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spi_set_drvdata(spi, &lis3_dev);
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return lis3lv02d_init_device(&lis3_dev);
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}
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static int lis302dl_spi_remove(struct spi_device *spi)
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{
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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lis3lv02d_joystick_disable(lis3);
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lis3lv02d_poweroff(lis3);
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lis3lv02d_remove_fs(&lis3_dev);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int lis3lv02d_spi_suspend(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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if (!lis3->pdata || !lis3->pdata->wakeup_flags)
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lis3lv02d_poweroff(&lis3_dev);
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return 0;
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}
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static int lis3lv02d_spi_resume(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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struct lis3lv02d *lis3 = spi_get_drvdata(spi);
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if (!lis3->pdata || !lis3->pdata->wakeup_flags)
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lis3lv02d_poweron(lis3);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
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lis3lv02d_spi_resume);
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static struct spi_driver lis302dl_spi_driver = {
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.driver = {
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.name = DRV_NAME,
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.pm = &lis3lv02d_spi_pm,
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.of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
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},
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.probe = lis302dl_spi_probe,
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.remove = lis302dl_spi_remove,
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};
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module_spi_driver(lis302dl_spi_driver);
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MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
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MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("spi:" DRV_NAME);
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