forked from Minki/linux
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>
319 lines
7.0 KiB
C
319 lines
7.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* lis3lv02d.h - ST LIS3LV02DL accelerometer driver
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*
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* Copyright (C) 2007-2008 Yan Burman
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* Copyright (C) 2008-2009 Eric Piel
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*/
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/regulator/consumer.h>
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#include <linux/miscdevice.h>
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/*
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* This driver tries to support the "digital" accelerometer chips from
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* STMicroelectronics such as LIS3LV02DL, LIS302DL, LIS3L02DQ, LIS331DL,
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* LIS331DLH, LIS35DE, or LIS202DL. They are very similar in terms of
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* programming, with almost the same registers. In addition to differing
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* on physical properties, they differ on the number of axes (2/3),
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* precision (8/12 bits), and special features (freefall detection,
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* click...). Unfortunately, not all the differences can be probed via
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* a register. They can be connected either via I²C or SPI.
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*/
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#include <linux/lis3lv02d.h>
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enum lis3_reg {
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WHO_AM_I = 0x0F,
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OFFSET_X = 0x16,
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OFFSET_Y = 0x17,
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OFFSET_Z = 0x18,
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GAIN_X = 0x19,
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GAIN_Y = 0x1A,
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GAIN_Z = 0x1B,
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CTRL_REG1 = 0x20,
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CTRL_REG2 = 0x21,
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CTRL_REG3 = 0x22,
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CTRL_REG4 = 0x23,
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HP_FILTER_RESET = 0x23,
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STATUS_REG = 0x27,
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OUTX_L = 0x28,
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OUTX_H = 0x29,
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OUTX = 0x29,
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OUTY_L = 0x2A,
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OUTY_H = 0x2B,
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OUTY = 0x2B,
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OUTZ_L = 0x2C,
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OUTZ_H = 0x2D,
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OUTZ = 0x2D,
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};
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enum lis302d_reg {
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FF_WU_CFG_1 = 0x30,
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FF_WU_SRC_1 = 0x31,
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FF_WU_THS_1 = 0x32,
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FF_WU_DURATION_1 = 0x33,
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FF_WU_CFG_2 = 0x34,
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FF_WU_SRC_2 = 0x35,
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FF_WU_THS_2 = 0x36,
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FF_WU_DURATION_2 = 0x37,
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CLICK_CFG = 0x38,
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CLICK_SRC = 0x39,
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CLICK_THSY_X = 0x3B,
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CLICK_THSZ = 0x3C,
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CLICK_TIMELIMIT = 0x3D,
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CLICK_LATENCY = 0x3E,
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CLICK_WINDOW = 0x3F,
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};
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enum lis3lv02d_reg {
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FF_WU_CFG = 0x30,
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FF_WU_SRC = 0x31,
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FF_WU_ACK = 0x32,
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FF_WU_THS_L = 0x34,
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FF_WU_THS_H = 0x35,
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FF_WU_DURATION = 0x36,
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DD_CFG = 0x38,
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DD_SRC = 0x39,
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DD_ACK = 0x3A,
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DD_THSI_L = 0x3C,
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DD_THSI_H = 0x3D,
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DD_THSE_L = 0x3E,
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DD_THSE_H = 0x3F,
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};
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enum lis3_who_am_i {
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WAI_3DLH = 0x32, /* 16 bits: LIS331DLH */
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WAI_3DC = 0x33, /* 8 bits: LIS3DC, HP3DC */
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WAI_12B = 0x3A, /* 12 bits: LIS3LV02D[LQ]... */
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WAI_8B = 0x3B, /* 8 bits: LIS[23]02D[LQ]... */
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WAI_6B = 0x52, /* 6 bits: LIS331DLF - not supported */
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};
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enum lis3_type {
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LIS3LV02D,
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LIS3DC,
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HP3DC,
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LIS2302D,
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LIS331DLF,
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LIS331DLH,
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};
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enum lis3lv02d_ctrl1_12b {
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CTRL1_Xen = 0x01,
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CTRL1_Yen = 0x02,
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CTRL1_Zen = 0x04,
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CTRL1_ST = 0x08,
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CTRL1_DF0 = 0x10,
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CTRL1_DF1 = 0x20,
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CTRL1_PD0 = 0x40,
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CTRL1_PD1 = 0x80,
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};
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/* Delta to ctrl1_12b version */
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enum lis3lv02d_ctrl1_8b {
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CTRL1_STM = 0x08,
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CTRL1_STP = 0x10,
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CTRL1_FS = 0x20,
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CTRL1_PD = 0x40,
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CTRL1_DR = 0x80,
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};
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enum lis3lv02d_ctrl1_3dc {
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CTRL1_ODR0 = 0x10,
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CTRL1_ODR1 = 0x20,
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CTRL1_ODR2 = 0x40,
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CTRL1_ODR3 = 0x80,
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};
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enum lis331dlh_ctrl1 {
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CTRL1_DR0 = 0x08,
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CTRL1_DR1 = 0x10,
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CTRL1_PM0 = 0x20,
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CTRL1_PM1 = 0x40,
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CTRL1_PM2 = 0x80,
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};
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enum lis331dlh_ctrl2 {
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CTRL2_HPEN1 = 0x04,
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CTRL2_HPEN2 = 0x08,
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CTRL2_FDS_3DLH = 0x10,
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CTRL2_BOOT_3DLH = 0x80,
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};
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enum lis331dlh_ctrl4 {
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CTRL4_STSIGN = 0x08,
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CTRL4_BLE = 0x40,
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CTRL4_BDU = 0x80,
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};
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enum lis3lv02d_ctrl2 {
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CTRL2_DAS = 0x01,
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CTRL2_SIM = 0x02,
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CTRL2_DRDY = 0x04,
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CTRL2_IEN = 0x08,
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CTRL2_BOOT = 0x10,
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CTRL2_BLE = 0x20,
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CTRL2_BDU = 0x40, /* Block Data Update */
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CTRL2_FS = 0x80, /* Full Scale selection */
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};
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enum lis3lv02d_ctrl4_3dc {
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CTRL4_SIM = 0x01,
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CTRL4_ST0 = 0x02,
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CTRL4_ST1 = 0x04,
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CTRL4_FS0 = 0x10,
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CTRL4_FS1 = 0x20,
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};
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enum lis302d_ctrl2 {
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HP_FF_WU2 = 0x08,
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HP_FF_WU1 = 0x04,
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CTRL2_BOOT_8B = 0x40,
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};
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enum lis3lv02d_ctrl3 {
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CTRL3_CFS0 = 0x01,
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CTRL3_CFS1 = 0x02,
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CTRL3_FDS = 0x10,
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CTRL3_HPFF = 0x20,
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CTRL3_HPDD = 0x40,
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CTRL3_ECK = 0x80,
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};
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enum lis3lv02d_status_reg {
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STATUS_XDA = 0x01,
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STATUS_YDA = 0x02,
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STATUS_ZDA = 0x04,
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STATUS_XYZDA = 0x08,
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STATUS_XOR = 0x10,
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STATUS_YOR = 0x20,
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STATUS_ZOR = 0x40,
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STATUS_XYZOR = 0x80,
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};
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enum lis3lv02d_ff_wu_cfg {
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FF_WU_CFG_XLIE = 0x01,
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FF_WU_CFG_XHIE = 0x02,
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FF_WU_CFG_YLIE = 0x04,
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FF_WU_CFG_YHIE = 0x08,
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FF_WU_CFG_ZLIE = 0x10,
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FF_WU_CFG_ZHIE = 0x20,
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FF_WU_CFG_LIR = 0x40,
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FF_WU_CFG_AOI = 0x80,
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};
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enum lis3lv02d_ff_wu_src {
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FF_WU_SRC_XL = 0x01,
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FF_WU_SRC_XH = 0x02,
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FF_WU_SRC_YL = 0x04,
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FF_WU_SRC_YH = 0x08,
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FF_WU_SRC_ZL = 0x10,
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FF_WU_SRC_ZH = 0x20,
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FF_WU_SRC_IA = 0x40,
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};
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enum lis3lv02d_dd_cfg {
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DD_CFG_XLIE = 0x01,
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DD_CFG_XHIE = 0x02,
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DD_CFG_YLIE = 0x04,
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DD_CFG_YHIE = 0x08,
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DD_CFG_ZLIE = 0x10,
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DD_CFG_ZHIE = 0x20,
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DD_CFG_LIR = 0x40,
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DD_CFG_IEND = 0x80,
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};
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enum lis3lv02d_dd_src {
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DD_SRC_XL = 0x01,
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DD_SRC_XH = 0x02,
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DD_SRC_YL = 0x04,
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DD_SRC_YH = 0x08,
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DD_SRC_ZL = 0x10,
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DD_SRC_ZH = 0x20,
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DD_SRC_IA = 0x40,
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};
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enum lis3lv02d_click_src_8b {
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CLICK_SINGLE_X = 0x01,
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CLICK_DOUBLE_X = 0x02,
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CLICK_SINGLE_Y = 0x04,
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CLICK_DOUBLE_Y = 0x08,
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CLICK_SINGLE_Z = 0x10,
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CLICK_DOUBLE_Z = 0x20,
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CLICK_IA = 0x40,
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};
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enum lis3lv02d_reg_state {
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LIS3_REG_OFF = 0x00,
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LIS3_REG_ON = 0x01,
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};
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union axis_conversion {
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struct {
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int x, y, z;
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};
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int as_array[3];
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};
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struct lis3lv02d {
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void *bus_priv; /* used by the bus layer only */
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struct device *pm_dev; /* for pm_runtime purposes */
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int (*init) (struct lis3lv02d *lis3);
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int (*write) (struct lis3lv02d *lis3, int reg, u8 val);
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int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret);
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int (*blkread) (struct lis3lv02d *lis3, int reg, int len, u8 *ret);
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int (*reg_ctrl) (struct lis3lv02d *lis3, bool state);
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int *odrs; /* Supported output data rates */
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u8 *regs; /* Regs to store / restore */
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int regs_size;
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u8 *reg_cache;
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bool regs_stored;
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u8 odr_mask; /* ODR bit mask */
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u8 whoami; /* indicates measurement precision */
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s16 (*read_data) (struct lis3lv02d *lis3, int reg);
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int mdps_max_val;
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int pwron_delay;
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int scale; /*
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* relationship between 1 LBS and mG
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* (1/1000th of earth gravity)
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*/
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struct input_dev *idev; /* input device */
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struct platform_device *pdev; /* platform device */
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struct regulator_bulk_data regulators[2];
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atomic_t count; /* interrupt count after last read */
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union axis_conversion ac; /* hw -> logical axis */
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int mapped_btns[3];
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u32 irq; /* IRQ number */
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struct fasync_struct *async_queue; /* queue for the misc device */
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wait_queue_head_t misc_wait; /* Wait queue for the misc device */
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unsigned long misc_opened; /* bit0: whether the device is open */
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struct miscdevice miscdev;
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int data_ready_count[2];
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atomic_t wake_thread;
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unsigned char irq_cfg;
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unsigned int shift_adj;
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struct lis3lv02d_platform_data *pdata; /* for passing board config */
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struct mutex mutex; /* Serialize poll and selftest */
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#ifdef CONFIG_OF
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struct device_node *of_node;
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#endif
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};
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int lis3lv02d_init_device(struct lis3lv02d *lis3);
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int lis3lv02d_joystick_enable(struct lis3lv02d *lis3);
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void lis3lv02d_joystick_disable(struct lis3lv02d *lis3);
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void lis3lv02d_poweroff(struct lis3lv02d *lis3);
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int lis3lv02d_poweron(struct lis3lv02d *lis3);
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void lis3lv02d_remove_fs(struct lis3lv02d *lis3);
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int lis3lv02d_init_dt(struct lis3lv02d *lis3);
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extern struct lis3lv02d lis3_dev;
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