From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- drivers/input/misc/mma8450.c | 226 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 226 insertions(+) create mode 100644 drivers/input/misc/mma8450.c (limited to 'drivers/input/misc/mma8450.c') diff --git a/drivers/input/misc/mma8450.c b/drivers/input/misc/mma8450.c new file mode 100644 index 000000000..403659a08 --- /dev/null +++ b/drivers/input/misc/mma8450.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for Freescale's 3-Axis Accelerometer MMA8450 + * + * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +#include +#include +#include +#include +#include +#include + +#define MMA8450_DRV_NAME "mma8450" + +#define MODE_CHANGE_DELAY_MS 100 +#define POLL_INTERVAL 100 +#define POLL_INTERVAL_MAX 500 + +/* register definitions */ +#define MMA8450_STATUS 0x00 +#define MMA8450_STATUS_ZXYDR 0x08 + +#define MMA8450_OUT_X8 0x01 +#define MMA8450_OUT_Y8 0x02 +#define MMA8450_OUT_Z8 0x03 + +#define MMA8450_OUT_X_LSB 0x05 +#define MMA8450_OUT_X_MSB 0x06 +#define MMA8450_OUT_Y_LSB 0x07 +#define MMA8450_OUT_Y_MSB 0x08 +#define MMA8450_OUT_Z_LSB 0x09 +#define MMA8450_OUT_Z_MSB 0x0a + +#define MMA8450_XYZ_DATA_CFG 0x16 + +#define MMA8450_CTRL_REG1 0x38 +#define MMA8450_CTRL_REG2 0x39 +#define MMA8450_ID 0xc6 +#define MMA8450_WHO_AM_I 0x0f + +static int mma8450_read(struct i2c_client *c, unsigned int off) +{ + int ret; + + ret = i2c_smbus_read_byte_data(c, off); + if (ret < 0) + dev_err(&c->dev, + "failed to read register 0x%02x, error %d\n", + off, ret); + + return ret; +} + +static int mma8450_write(struct i2c_client *c, unsigned int off, u8 v) +{ + int error; + + error = i2c_smbus_write_byte_data(c, off, v); + if (error < 0) { + dev_err(&c->dev, + "failed to write to register 0x%02x, error %d\n", + off, error); + return error; + } + + return 0; +} + +static int mma8450_read_block(struct i2c_client *c, unsigned int off, + u8 *buf, size_t size) +{ + int err; + + err = i2c_smbus_read_i2c_block_data(c, off, size, buf); + if (err < 0) { + dev_err(&c->dev, + "failed to read block data at 0x%02x, error %d\n", + MMA8450_OUT_X_LSB, err); + return err; + } + + return 0; +} + +static void mma8450_poll(struct input_dev *input) +{ + struct i2c_client *c = input_get_drvdata(input); + int x, y, z; + int ret; + u8 buf[6]; + + ret = mma8450_read(c, MMA8450_STATUS); + if (ret < 0) + return; + + if (!(ret & MMA8450_STATUS_ZXYDR)) + return; + + ret = mma8450_read_block(c, MMA8450_OUT_X_LSB, buf, sizeof(buf)); + if (ret < 0) + return; + + x = ((int)(s8)buf[1] << 4) | (buf[0] & 0xf); + y = ((int)(s8)buf[3] << 4) | (buf[2] & 0xf); + z = ((int)(s8)buf[5] << 4) | (buf[4] & 0xf); + + input_report_abs(input, ABS_X, x); + input_report_abs(input, ABS_Y, y); + input_report_abs(input, ABS_Z, z); + input_sync(input); +} + +/* Initialize the MMA8450 chip */ +static int mma8450_open(struct input_dev *input) +{ + struct i2c_client *c = input_get_drvdata(input); + int err; + + /* enable all events from X/Y/Z, no FIFO */ + err = mma8450_write(c, MMA8450_XYZ_DATA_CFG, 0x07); + if (err) + return err; + + /* + * Sleep mode poll rate - 50Hz + * System output data rate - 400Hz + * Full scale selection - Active, +/- 2G + */ + err = mma8450_write(c, MMA8450_CTRL_REG1, 0x01); + if (err) + return err; + + msleep(MODE_CHANGE_DELAY_MS); + return 0; +} + +static void mma8450_close(struct input_dev *input) +{ + struct i2c_client *c = input_get_drvdata(input); + + mma8450_write(c, MMA8450_CTRL_REG1, 0x00); + mma8450_write(c, MMA8450_CTRL_REG2, 0x01); +} + +/* + * I2C init/probing/exit functions + */ +static int mma8450_probe(struct i2c_client *c) +{ + struct i2c_adapter *adapter = c->adapter; + struct input_dev *input; + int err, client_id; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE | + I2C_FUNC_SMBUS_BYTE_DATA)) + return dev_err_probe(&c->dev, -EINVAL, + "I2C adapter doesn't support SMBUS BYTE"); + + client_id = i2c_smbus_read_byte_data(c, MMA8450_WHO_AM_I); + if (client_id != MMA8450_ID) + return dev_err_probe(&c->dev, -EINVAL, + "unexpected chip ID 0x%x (vs 0x%x)\n", + client_id, MMA8450_ID); + + input = devm_input_allocate_device(&c->dev); + if (!input) + return -ENOMEM; + + input_set_drvdata(input, c); + + input->name = MMA8450_DRV_NAME; + input->id.bustype = BUS_I2C; + + input->open = mma8450_open; + input->close = mma8450_close; + + input_set_abs_params(input, ABS_X, -2048, 2047, 32, 32); + input_set_abs_params(input, ABS_Y, -2048, 2047, 32, 32); + input_set_abs_params(input, ABS_Z, -2048, 2047, 32, 32); + + err = input_setup_polling(input, mma8450_poll); + if (err) { + dev_err(&c->dev, "failed to set up polling\n"); + return err; + } + + input_set_poll_interval(input, POLL_INTERVAL); + input_set_max_poll_interval(input, POLL_INTERVAL_MAX); + + err = input_register_device(input); + if (err) { + dev_err(&c->dev, "failed to register input device\n"); + return err; + } + + return 0; +} + +static const struct i2c_device_id mma8450_id[] = { + { .name = MMA8450_DRV_NAME }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mma8450_id); + +static const struct of_device_id mma8450_dt_ids[] = { + { .compatible = "fsl,mma8450", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mma8450_dt_ids); + +static struct i2c_driver mma8450_driver = { + .driver = { + .name = MMA8450_DRV_NAME, + .of_match_table = mma8450_dt_ids, + }, + .probe = mma8450_probe, + .id_table = mma8450_id, +}; + +module_i2c_driver(mma8450_driver); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("MMA8450 3-Axis Accelerometer Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1