^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * lis3lv02d_spi - SPI glue layer for lis3lv02d
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "lis3lv02d.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define DRV_NAME "lis3lv02d_spi"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LIS3_SPI_READ 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static int lis3_spi_read(struct lis3lv02d *lis3, int reg, u8 *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct spi_device *spi = lis3->bus_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int ret = spi_w8r8(spi, reg | LIS3_SPI_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) *v = (u8) ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int lis3_spi_write(struct lis3lv02d *lis3, int reg, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 tmp[2] = { reg, val };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct spi_device *spi = lis3->bus_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return spi_write(spi, tmp, sizeof(tmp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int lis3_spi_init(struct lis3lv02d *lis3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u8 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* power up the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ret = lis3->read(lis3, CTRL_REG1, ®);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) reg |= CTRL1_PD0 | CTRL1_Xen | CTRL1_Yen | CTRL1_Zen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return lis3->write(lis3, CTRL_REG1, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static union axis_conversion lis3lv02d_axis_normal =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) { .as_array = { 1, 2, 3 } };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static const struct of_device_id lis302dl_spi_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) { .compatible = "st,lis302dl-spi" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int lis302dl_spi_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) spi->bits_per_word = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) spi->mode = SPI_MODE_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ret = spi_setup(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) lis3_dev.bus_priv = spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) lis3_dev.init = lis3_spi_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) lis3_dev.read = lis3_spi_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) lis3_dev.write = lis3_spi_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) lis3_dev.irq = spi->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) lis3_dev.ac = lis3lv02d_axis_normal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) lis3_dev.pdata = spi->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (of_match_device(lis302dl_spi_dt_ids, &spi->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) lis3_dev.of_node = spi->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = lis3lv02d_init_dt(&lis3_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) spi_set_drvdata(spi, &lis3_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return lis3lv02d_init_device(&lis3_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static int lis302dl_spi_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct lis3lv02d *lis3 = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) lis3lv02d_joystick_disable(lis3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) lis3lv02d_poweroff(lis3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return lis3lv02d_remove_fs(&lis3_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #ifdef CONFIG_PM_SLEEP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int lis3lv02d_spi_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct lis3lv02d *lis3 = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (!lis3->pdata || !lis3->pdata->wakeup_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) lis3lv02d_poweroff(&lis3_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int lis3lv02d_spi_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct lis3lv02d *lis3 = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (!lis3->pdata || !lis3->pdata->wakeup_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) lis3lv02d_poweron(lis3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static SIMPLE_DEV_PM_OPS(lis3lv02d_spi_pm, lis3lv02d_spi_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) lis3lv02d_spi_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static struct spi_driver lis302dl_spi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .pm = &lis3lv02d_spi_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .probe = lis302dl_spi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .remove = lis302dl_spi_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) module_spi_driver(lis302dl_spi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) MODULE_DESCRIPTION("lis3lv02d SPI glue layer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_ALIAS("spi:" DRV_NAME);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags