Re: [PATCH v1 2/9] misc: Support Asus Transformer's EC access device

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Sun, Feb 01, 2026 at 12:43:36PM +0200, Svyatoslav Ryhel wrote:
> --- /dev/null
> +++ b/drivers/misc/asus-dockram.c
> @@ -0,0 +1,327 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * ASUS EC: DockRAM
> + */
> +
> +#include <linux/device.h>
> +#include <linux/err.h>
> +#include <linux/i2c.h>
> +#include <linux/mfd/asus-ec.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/slab.h>
> +#include <linux/string.h>
> +#include <linux/sysfs.h>
> +#include <linux/types.h>
> +#include <linux/unaligned.h>
> +
> +struct dockram_ec_data {
> +	struct mutex ctl_lock; /* prevent simultaneous access */
> +	char ctl_data[DOCKRAM_ENTRY_BUFSIZE];
> +};
> +
> +int asus_dockram_read(struct i2c_client *client, int reg, char *buf)
> +{
> +	int rc;
> +
> +	memset(buf, 0, DOCKRAM_ENTRY_BUFSIZE);
> +	rc = i2c_smbus_read_i2c_block_data(client, reg, DOCKRAM_ENTRY_BUFSIZE, buf);
> +	if (rc < 0)
> +		return rc;
> +
> +	if (buf[0] > DOCKRAM_ENTRY_SIZE) {
> +		dev_err(&client->dev, "bad data len; buffer: %*ph; rc: %d\n",
> +			DOCKRAM_ENTRY_BUFSIZE, buf, rc);
> +		return -EPROTO;
> +	}
> +
> +	dev_dbg(&client->dev, "got data; buffer: %*ph; rc: %d\n",
> +		DOCKRAM_ENTRY_BUFSIZE, buf, rc);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(asus_dockram_read);

No documentation for these new public symbols?


> +static BIN_ATTR_RW(dockram, DOCKRAM_ENTRIES * DOCKRAM_ENTRY_SIZE);
> +static DEVICE_ATTR_RW(control_reg);

You did not document your new sysfs files in Documentation/ABI/ which is
required.

Also, why do you need a brand new user/kernel api at all?  Who is going
to use this and for what?

thanks,

greg k-h