Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
misc: ds1682: Add NVMEM support
Add NVMEM support for the internal EEPROM.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://lore.kernel.org/r/20240315213540.1682964-1-sean.anderson@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Sean Anderson
and committed by
Greg Kroah-Hartman
115ee553
ad76f3e8
+37
+37
drivers/misc/ds1682.c
+37
drivers/misc/ds1682.c
···
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#include <linux/i2c.h>
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#include <linux/string.h>
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#include <linux/list.h>
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#include <linux/nvmem-provider.h>
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#include <linux/sysfs.h>
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#include <linux/ctype.h>
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#include <linux/hwmon-sysfs.h>
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.write = ds1682_eeprom_write,
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};
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static int ds1682_nvmem_read(void *priv, unsigned int offset, void *val,
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size_t bytes)
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{
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struct i2c_client *client = priv;
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int ret;
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ret = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + offset,
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bytes, val);
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return ret < 0 ? ret : 0;
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}
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static int ds1682_nvmem_write(void *priv, unsigned int offset, void *val,
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size_t bytes)
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{
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struct i2c_client *client = priv;
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int ret;
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ret = i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + offset,
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bytes, val);
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return ret < 0 ? ret : 0;
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}
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/*
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* Called when a ds1682 device is matched with this driver
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*/
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static int ds1682_probe(struct i2c_client *client)
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{
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struct nvmem_config config = {
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.dev = &client->dev,
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.owner = THIS_MODULE,
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.type = NVMEM_TYPE_EEPROM,
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.reg_read = ds1682_nvmem_read,
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.reg_write = ds1682_nvmem_write,
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.size = DS1682_EEPROM_SIZE,
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.priv = client,
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};
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struct nvmem_device *nvmem;
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int rc;
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if (!i2c_check_functionality(client->adapter,
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rc = -ENODEV;
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goto exit;
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}
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nvmem = devm_nvmem_register(&client->dev, &config);
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if (IS_ENABLED(CONFIG_NVMEM) && IS_ERR(nvmem))
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return PTR_ERR(nvmem);
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rc = sysfs_create_group(&client->dev.kobj, &ds1682_group);
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if (rc)