Merge tag 'char-misc-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc and other driver updates from Greg KH:
 "Here is the big set of char/misc and other driver subsystem changes
  for 6.8-rc1.

  Other than lots of binder driver changes (as you can see by the merge
  conflicts) included in here are:

   - lots of iio driver updates and additions

   - spmi driver updates

   - eeprom driver updates

   - firmware driver updates

   - ocxl driver updates

   - mhi driver updates

   - w1 driver updates

   - nvmem driver updates

   - coresight driver updates

   - platform driver remove callback api changes

   - tags.sh script updates

   - bus_type constant marking cleanups

   - lots of other small driver updates

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (341 commits)
  android: removed duplicate linux/errno
  uio: Fix use-after-free in uio_open
  drivers: soc: xilinx: add check for platform
  firmware: xilinx: Export function to use in other module
  scripts/tags.sh: remove find_sources
  scripts/tags.sh: use -n to test archinclude
  scripts/tags.sh: add local annotation
  scripts/tags.sh: use more portable -path instead of -wholename
  scripts/tags.sh: Update comment (addition of gtags)
  firmware: zynqmp: Convert to platform remove callback returning void
  firmware: turris-mox-rwtm: Convert to platform remove callback returning void
  firmware: stratix10-svc: Convert to platform remove callback returning void
  firmware: stratix10-rsu: Convert to platform remove callback returning void
  firmware: raspberrypi: Convert to platform remove callback returning void
  firmware: qemu_fw_cfg: Convert to platform remove callback returning void
  firmware: mtk-adsp-ipc: Convert to platform remove callback returning void
  firmware: imx-dsp: Convert to platform remove callback returning void
  firmware: coreboot_table: Convert to platform remove callback returning void
  firmware: arm_scpi: Convert to platform remove callback returning void
  firmware: arm_scmi: Convert to platform remove callback returning void
  ...

1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/iio/imu/bmi323/bmi323_i2c.c b/drivers/iio/imu/bmi323/bmi323_i2c.c
new file mode 100644
index 000000000000..20a8001b9956
--- /dev/null
+++ b/drivers/iio/imu/bmi323/bmi323_i2c.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * I2C driver for Bosch BMI323 6-Axis IMU.
+ *
+ * Copyright (C) 2023, Jagath Jog J <jagathjog1996@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "bmi323.h"
+
+struct bmi323_i2c_priv {
+	struct i2c_client *i2c;
+	u8 i2c_rx_buffer[BMI323_FIFO_LENGTH_IN_BYTES + BMI323_I2C_DUMMY];
+};
+
+/*
+ * From BMI323 datasheet section 4: Notes on the Serial Interface Support.
+ * Each I2C register read operation requires to read two dummy bytes before
+ * the actual payload.
+ */
+static int bmi323_regmap_i2c_read(void *context, const void *reg_buf,
+				  size_t reg_size, void *val_buf,
+				  size_t val_size)
+{
+	struct bmi323_i2c_priv *priv = context;
+	struct i2c_msg msgs[2];
+	int ret;
+
+	msgs[0].addr = priv->i2c->addr;
+	msgs[0].flags = priv->i2c->flags;
+	msgs[0].len = reg_size;
+	msgs[0].buf = (u8 *)reg_buf;
+
+	msgs[1].addr = priv->i2c->addr;
+	msgs[1].len = val_size + BMI323_I2C_DUMMY;
+	msgs[1].buf = priv->i2c_rx_buffer;
+	msgs[1].flags = priv->i2c->flags | I2C_M_RD;
+
+	ret = i2c_transfer(priv->i2c->adapter, msgs, ARRAY_SIZE(msgs));
+	if (ret < 0)
+		return -EIO;
+
+	memcpy(val_buf, priv->i2c_rx_buffer + BMI323_I2C_DUMMY, val_size);
+
+	return 0;
+}
+
+static int bmi323_regmap_i2c_write(void *context, const void *data,
+				   size_t count)
+{
+	struct bmi323_i2c_priv *priv = context;
+	u8 reg;
+
+	reg = *(u8 *)data;
+	return i2c_smbus_write_i2c_block_data(priv->i2c, reg,
+					      count - sizeof(u8),
+					      data + sizeof(u8));
+}
+
+static struct regmap_bus bmi323_regmap_bus = {
+	.read = bmi323_regmap_i2c_read,
+	.write = bmi323_regmap_i2c_write,
+};
+
+static const struct regmap_config bmi323_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.max_register = BMI323_CFG_RES_REG,
+	.val_format_endian = REGMAP_ENDIAN_LITTLE,
+};
+
+static int bmi323_i2c_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct bmi323_i2c_priv *priv;
+	struct regmap *regmap;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->i2c = i2c;
+	regmap = devm_regmap_init(dev, &bmi323_regmap_bus, priv,
+				  &bmi323_i2c_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap),
+				     "Failed to initialize I2C Regmap\n");
+
+	return bmi323_core_probe(dev);
+}
+
+static const struct i2c_device_id bmi323_i2c_ids[] = {
+	{ "bmi323" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, bmi323_i2c_ids);
+
+static const struct of_device_id bmi323_of_i2c_match[] = {
+	{ .compatible = "bosch,bmi323" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bmi323_of_i2c_match);
+
+static struct i2c_driver bmi323_i2c_driver = {
+	.driver = {
+		.name = "bmi323",
+		.of_match_table = bmi323_of_i2c_match,
+	},
+	.probe = bmi323_i2c_probe,
+	.id_table = bmi323_i2c_ids,
+};
+module_i2c_driver(bmi323_i2c_driver);
+
+MODULE_DESCRIPTION("Bosch BMI323 IMU driver");
+MODULE_AUTHOR("Jagath Jog J <jagathjog1996@gmail.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_BMI323);