On Mon, Dec 23, 2013 at 5:08 PM, Laszlo Papp <lp...@kde.org> wrote:
> MAX6650/MAX6651 chip is a multi-function device with I2C busses. The
> chip includes fan-speed regulators and monitors, GPIO, and alarm.
>
> This patch is an initial release of a MAX6650/6651 MFD driver that
> supports to enable the chip with its primary I2C bus that will connect
> the hwmon, and then the gpio devices for now.
>
> Signed-off-by: Laszlo Papp <lp...@kde.org>
(...)
> +++ b/include/linux/mfd/max6651-private.h
> +struct max6651_dev {
> + struct device *dev;
> + struct mutex iolock;
> +
> + struct i2c_client *i2c;
> +
> + int type;
> +};
> +
> +enum max6651_types {
> + TYPE_MAX6650,
> + TYPE_MAX6651,
> +};
> +
> +extern int max6651_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
> +extern int max6651_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
It looks like you're reinventing regmap.
- In the Kconfig entry for the MFD device:
select REGMAP_I2C
- Look in drivers/mfd/stw481x.c for an example using
<linux/regmap.h>
- Look into
drivers/regulator/stw481x-vmmc.c
for an example regmap MFD spawned child cell.
Yours,
Linus Walleij
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