linux-kernel - RE: [PATCH v8 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD driver

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Message-ID: <B256D81BAE5131468A838E5D7A243641D63FA932@penmbx01>
Date:	Wed, 27 Jan 2016 08:40:16 +0000
From:	"Yang, Wenyou" <Wenyou.Yang@...el.com>
To:	Peter Korsgaard <peter@...sgaard.com>
CC:	Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
	"Pawel Moll" <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	"Ian Campbell" <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Javier Martinez Canillas <javier@...hile0.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Peter Korsgaard <jacmet@...il.com>,
	"Ferre, Nicolas" <Nicolas.FERRE@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH v8 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC MFD
 driver

Hi Peter,

> -----Original Message-----
> From: Peter Korsgaard [mailto:jacmet@...il.com] On Behalf Of Peter Korsgaard
> Sent: 2016年1月27日 16:05
> To: Yang, Wenyou <Wenyou.Yang@...el.com>
> Cc: Lee Jones <lee.jones@...aro.org>; Rob Herring <robh+dt@...nel.org>;
> Pawel Moll <pawel.moll@....com>; Mark Rutland <mark.rutland@....com>; Ian
> Campbell <ijc+devicetree@...lion.org.uk>; Kumar Gala <galak@...eaurora.org>;
> Javier Martinez Canillas <javier@...hile0.org>; Krzysztof Kozlowski
> <k.kozlowski@...sung.com>; Peter Korsgaard <jacmet@...il.com>; Ferre,
> Nicolas <Nicolas.FERRE@...el.com>; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; devicetree@...r.kernel.org
> Subject: Re: [PATCH v8 1/2] mfd: act8945a: add Active-semi ACT8945A PMIC
> MFD driver
> 
> >>>>> "Wenyou" == Wenyou Yang <wenyou.yang@...el.com> 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@...el.com>  > Reviewed-by:
> Krzysztof Kozlowski <k.kozlowski@...sung.com>
> 
> Thanks, looks good - One more thing though:
> 
>  > +
>  > +struct act8945a_dev {
>  > +	struct regmap *regmap;
>  > +};
> 
> You don't need this structure as you used devm. With that removed (and the logic
> to devm_kzalloc it) you can add my:

Yes, it can be removed.

> 
> Acked-by: Peter Korsgaard <peter@...sgaard.com>
> 

Thank you for you Acked.

> 
>  > +static const struct mfd_cell act8945a_devs[] = {
>  > +	{
>  > +		.name = "act8945a-regulator",
>  > +		.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;
>  > +
>  > +	i2c_set_clientdata(i2c, act8945a);
>  > +
>  > +	act8945a->regmap = devm_regmap_init_i2c(i2c,
> &act8945a_regmap_config);
>  > +	if (IS_ERR(act8945a->regmap)) {
>  > +		ret = PTR_ERR(act8945a->regmap);
>  > +		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
>  > +		return ret;
>  > +	}
>  > +
>  > +	ret = mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
> act8945a_devs,
>  > +			      ARRAY_SIZE(act8945a_devs), NULL, 0, NULL);
>  > +	if (ret) {
>  > +		dev_err(&i2c->dev, "Failed to add sub devices\n");
>  > +		return ret;
>  > +	}
>  > +
>  > +	return 0;
>  > +}
>  > +
>  > +static int act8945a_i2c_remove(struct i2c_client *i2c)  > +{
>  > +	mfd_remove_devices(&i2c->dev);
>  > +
>  > +	return 0;
>  > +}
>  > +
>  > +static const struct i2c_device_id act8945a_i2c_id[] = {
>  > +	{ "act8945a", 0 },
>  > +	{}
>  > +};
>  > +MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);  > +  > +static const struct
> of_device_id act8945a_of_match[] = {
>  > +	{ .compatible = "active-semi,act8945a", },
>  > +	{},
>  > +};
>  > +MODULE_DEVICE_TABLE(of, act8945a_of_match);  > +  > +static struct
> i2c_driver act8945a_i2c_driver = {
>  > +	.driver = {
>  > +		   .name = "act8945a",
>  > +		   .of_match_table = of_match_ptr(act8945a_of_match),
>  > +	},
>  > +	.probe = act8945a_i2c_probe,
>  > +	.remove = act8945a_i2c_remove,
>  > +	.id_table = act8945a_i2c_id,
>  > +};
>  > +
>  > +static int __init act8945a_i2c_init(void)  > +{
>  > +	return i2c_add_driver(&act8945a_i2c_driver);
>  > +}
>  > +subsys_initcall(act8945a_i2c_init);
>  > +
>  > +static void __exit act8945a_i2c_exit(void)  > +{
>  > +	i2c_del_driver(&act8945a_i2c_driver);
>  > +}
>  > +module_exit(act8945a_i2c_exit);
>  > +
>  > +MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");  >
> +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@...el.com>");  >
> +MODULE_LICENSE("GPL");  > --  > 1.7.9.5
> 
> 
> 
> --
> Bye, Peter Korsgaard


Best regards,
Wenyou Yang