>>>>> "Wenyou" == Wenyou Yang <wenyou.yang@xxxxxxxxx> writes:
> This patch adds support for the Active-semi ACT8945A PMIC.
> It is a Multi Function Device with the following subdevices:
> - Regulator
> - Charger
> It is interfaced to the host controller using I2C interface,
> ACT8945A is a child device of the I2C.
> Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> ---
> Changes in v5:
> - change depends on to 'I2C=y'.
Why not make it a tristate instead? Having regulators as modules is
perhaps not a very wise thing to do, but conceptually I don't see why
this code couldn't be a module.
> +config MFD_ACT8945A
> + bool "Active-semi ACT8945A"
> + select MFD_CORE
> + select REGMAP_I2C
> + depends on I2C=y && OF
> + help
> + Support for the ACT8945A PMIC from Active-semi. This device
> + features three step-down DC/DC converters and four low-dropout
> + linear regulators, along with a complete ActivePath battery
> + charger.
> +
[snip]
> +++ b/drivers/mfd/act8945a.c
> @@ -0,0 +1,109 @@
> +/*
> + * MFD driver for Active-semi ACT8945a PMIC
> + *
> + * Copyright (C) 2015 Atmel Corporation.
> + *
> + * Author: Wenyou Yang <wenyou.yang@xxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at your
> + * option) any later version.
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/mfd/act8945a.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +
> +static const struct mfd_cell act8945a_devs[] = {
> + {
> + .name = "act8945a-pmic",
> + .of_compatible = "active-semi,act8945a-regulator",
> + },
> + {
> + .name = "act8945a-charger",
> + .of_compatible = "active-semi,act8945a-charger",
> + },
> +};
> +
> +static const struct regmap_config act8945a_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> +};
> +
> +static int act8945a_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + struct act8945a_dev *act8945a;
> + int ret;
> +
> + act8945a = devm_kzalloc(&i2c->dev, sizeof(*act8945a), GFP_KERNEL);
> + if (!act8945a)
> + return -ENOMEM;
> +
What is the point of this structure (and the header file)? Can't the
subdevices just do dev_get_regmap(dev->parent)? regulator_register()
afaik already does this by default.
--
Bye, Peter Korsgaard
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