diff mbox

[v6,4/8] mfd: hi6421-pmic: add support for HiSilicon Hi6421v530

Message ID 20170608220841.26531-5-guodong.xu@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Guodong Xu June 8, 2017, 10:08 p.m. UTC
Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
main SoC via memory-mapped I/O.

Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon,
but at different revisions. They share the same memory-mapped I/O
design. They differ in integrated devices, such as regulator details,
LDO voltage points.

Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/mfd/hi6421-pmic-core.c  | 70 ++++++++++++++++++++++++++++++-----------
 include/linux/mfd/hi6421-pmic.h |  5 +++
 2 files changed, 57 insertions(+), 18 deletions(-)

Comments

Guodong Xu June 26, 2017, 1:33 p.m. UTC | #1
Hi, Lee

Sorry to disturb. May I get some of your bandwidth on this patch? Does
it looks good or needs more tweak?

Other patches in this patchset, dts, regulator, have been integrated
into linux-next. So, only this one and the patch 8/8 of defconfig [1]
need your special attention.

[1] defconfig: https://lkml.org/lkml/2017/6/8/1077

Thank you.

Best regards,
Guodong

On Fri, Jun 9, 2017 at 6:08 AM, Guodong Xu <guodong.xu@linaro.org> wrote:
> Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
> main SoC via memory-mapped I/O.
>
> Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon,
> but at different revisions. They share the same memory-mapped I/O
> design. They differ in integrated devices, such as regulator details,
> LDO voltage points.
>
> Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
> Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/mfd/hi6421-pmic-core.c  | 70 ++++++++++++++++++++++++++++++-----------
>  include/linux/mfd/hi6421-pmic.h |  5 +++
>  2 files changed, 57 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/mfd/hi6421-pmic-core.c b/drivers/mfd/hi6421-pmic-core.c
> index b1139d4..6fb7ba2 100644
> --- a/drivers/mfd/hi6421-pmic-core.c
> +++ b/drivers/mfd/hi6421-pmic-core.c
> @@ -1,9 +1,9 @@
>  /*
> - * Device driver for Hi6421 IC
> + * Device driver for Hi6421 PMIC
>   *
>   * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
>   *              http://www.hisilicon.com
> - * Copyright (c) <2013-2014> Linaro Ltd.
> + * Copyright (c) <2013-2017> Linaro Ltd.
>   *              http://www.linaro.org
>   *
>   * Author: Guodong Xu <guodong.xu@linaro.org>
> @@ -16,16 +16,20 @@
>  #include <linux/device.h>
>  #include <linux/err.h>
>  #include <linux/mfd/core.h>
> +#include <linux/mfd/hi6421-pmic.h>
>  #include <linux/module.h>
> -#include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
> -#include <linux/mfd/hi6421-pmic.h>
>
>  static const struct mfd_cell hi6421_devs[] = {
>         { .name = "hi6421-regulator", },
>  };
>
> +static const struct mfd_cell hi6421v530_devs[] = {
> +       { .name = "hi6421v530-regulator", },
> +};
> +
>  static const struct regmap_config hi6421_regmap_config = {
>         .reg_bits = 32,
>         .reg_stride = 4,
> @@ -33,12 +37,33 @@ static const struct regmap_config hi6421_regmap_config = {
>         .max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
>  };
>
> +static const struct of_device_id of_hi6421_pmic_match[] = {
> +       {
> +               .compatible = "hisilicon,hi6421-pmic",
> +               .data = (void *)HI6421
> +       },
> +       {
> +               .compatible = "hisilicon,hi6421v530-pmic",
> +               .data = (void *)HI6421_V530
> +       },
> +       { },
> +};
> +MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
> +
>  static int hi6421_pmic_probe(struct platform_device *pdev)
>  {
>         struct hi6421_pmic *pmic;
>         struct resource *res;
> +       const struct of_device_id *id;
> +       const struct mfd_cell *subdevs;
> +       enum hi6421_type type;
>         void __iomem *base;
> -       int ret;
> +       int n_subdevs, ret;
> +
> +       id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
> +       if (!id)
> +               return -EINVAL;
> +       type = (enum hi6421_type)id->data;
>
>         pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
>         if (!pmic)
> @@ -57,18 +82,33 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
>                 return PTR_ERR(pmic->regmap);
>         }
>
> -       /* set over-current protection debounce 8ms */
> -       regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
> +       platform_set_drvdata(pdev, pmic);
> +
> +       switch (type) {
> +       case HI6421:
> +               /* set over-current protection debounce 8ms */
> +               regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
>                                 (HI6421_OCP_DEB_SEL_MASK
>                                  | HI6421_OCP_EN_DEBOUNCE_MASK
>                                  | HI6421_OCP_AUTO_STOP_MASK),
>                                 (HI6421_OCP_DEB_SEL_8MS
>                                  | HI6421_OCP_EN_DEBOUNCE_ENABLE));
>
> -       platform_set_drvdata(pdev, pmic);
> +               subdevs = hi6421_devs;
> +               n_subdevs = ARRAY_SIZE(hi6421_devs);
> +               break;
> +       case HI6421_V530:
> +               subdevs = hi6421v530_devs;
> +               n_subdevs = ARRAY_SIZE(hi6421v530_devs);
> +               break;
> +       default:
> +               dev_err(&pdev->dev, "Unknown device type %d\n",
> +                                               (unsigned int)type);
> +               return -EINVAL;
> +       }
>
> -       ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs,
> -                                  ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
> +       ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
> +                                  subdevs, n_subdevs, NULL, 0, NULL);
>         if (ret) {
>                 dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
>                 return ret;
> @@ -77,16 +117,10 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
>         return 0;
>  }
>
> -static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
> -       { .compatible = "hisilicon,hi6421-pmic", },
> -       { },
> -};
> -MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
> -
>  static struct platform_driver hi6421_pmic_driver = {
>         .driver = {
> -               .name   = "hi6421_pmic",
> -               .of_match_table = of_hi6421_pmic_match_tbl,
> +               .name = "hi6421_pmic",
> +               .of_match_table = of_hi6421_pmic_match,
>         },
>         .probe  = hi6421_pmic_probe,
>  };
> diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h
> index 587273e..2580c08 100644
> --- a/include/linux/mfd/hi6421-pmic.h
> +++ b/include/linux/mfd/hi6421-pmic.h
> @@ -38,4 +38,9 @@ struct hi6421_pmic {
>         struct regmap           *regmap;
>  };
>
> +enum hi6421_type {
> +       HI6421 = 0,
> +       HI6421_V530,
> +};
> +
>  #endif         /* __HI6421_PMIC_H */
> --
> 2.10.2
>
Lee Jones July 3, 2017, noon UTC | #2
On Fri, 09 Jun 2017, Guodong Xu wrote:

> Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
> main SoC via memory-mapped I/O.
> 
> Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon,
> but at different revisions. They share the same memory-mapped I/O
> design. They differ in integrated devices, such as regulator details,
> LDO voltage points.
> 
> Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
> Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/mfd/hi6421-pmic-core.c  | 70 ++++++++++++++++++++++++++++++-----------
>  include/linux/mfd/hi6421-pmic.h |  5 +++
>  2 files changed, 57 insertions(+), 18 deletions(-)

For my own reference:
  Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>

Plan is to apply this set after the merge-window closes.

> diff --git a/drivers/mfd/hi6421-pmic-core.c b/drivers/mfd/hi6421-pmic-core.c
> index b1139d4..6fb7ba2 100644
> --- a/drivers/mfd/hi6421-pmic-core.c
> +++ b/drivers/mfd/hi6421-pmic-core.c
> @@ -1,9 +1,9 @@
>  /*
> - * Device driver for Hi6421 IC
> + * Device driver for Hi6421 PMIC
>   *
>   * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
>   *              http://www.hisilicon.com
> - * Copyright (c) <2013-2014> Linaro Ltd.
> + * Copyright (c) <2013-2017> Linaro Ltd.
>   *              http://www.linaro.org
>   *
>   * Author: Guodong Xu <guodong.xu@linaro.org>
> @@ -16,16 +16,20 @@
>  #include <linux/device.h>
>  #include <linux/err.h>
>  #include <linux/mfd/core.h>
> +#include <linux/mfd/hi6421-pmic.h>
>  #include <linux/module.h>
> -#include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
> -#include <linux/mfd/hi6421-pmic.h>
>  
>  static const struct mfd_cell hi6421_devs[] = {
>  	{ .name = "hi6421-regulator", },
>  };
>  
> +static const struct mfd_cell hi6421v530_devs[] = {
> +	{ .name = "hi6421v530-regulator", },
> +};
> +
>  static const struct regmap_config hi6421_regmap_config = {
>  	.reg_bits = 32,
>  	.reg_stride = 4,
> @@ -33,12 +37,33 @@ static const struct regmap_config hi6421_regmap_config = {
>  	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
>  };
>  
> +static const struct of_device_id of_hi6421_pmic_match[] = {
> +	{
> +		.compatible = "hisilicon,hi6421-pmic",
> +		.data = (void *)HI6421
> +	},
> +	{
> +		.compatible = "hisilicon,hi6421v530-pmic",
> +		.data = (void *)HI6421_V530
> +	},
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
> +
>  static int hi6421_pmic_probe(struct platform_device *pdev)
>  {
>  	struct hi6421_pmic *pmic;
>  	struct resource *res;
> +	const struct of_device_id *id;
> +	const struct mfd_cell *subdevs;
> +	enum hi6421_type type;
>  	void __iomem *base;
> -	int ret;
> +	int n_subdevs, ret;
> +
> +	id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
> +	if (!id)
> +		return -EINVAL;
> +	type = (enum hi6421_type)id->data;
>  
>  	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
>  	if (!pmic)
> @@ -57,18 +82,33 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
>  		return PTR_ERR(pmic->regmap);
>  	}
>  
> -	/* set over-current protection debounce 8ms */
> -	regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
> +	platform_set_drvdata(pdev, pmic);
> +
> +	switch (type) {
> +	case HI6421:
> +		/* set over-current protection debounce 8ms */
> +		regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
>  				(HI6421_OCP_DEB_SEL_MASK
>  				 | HI6421_OCP_EN_DEBOUNCE_MASK
>  				 | HI6421_OCP_AUTO_STOP_MASK),
>  				(HI6421_OCP_DEB_SEL_8MS
>  				 | HI6421_OCP_EN_DEBOUNCE_ENABLE));
>  
> -	platform_set_drvdata(pdev, pmic);
> +		subdevs = hi6421_devs;
> +		n_subdevs = ARRAY_SIZE(hi6421_devs);
> +		break;
> +	case HI6421_V530:
> +		subdevs = hi6421v530_devs;
> +		n_subdevs = ARRAY_SIZE(hi6421v530_devs);
> +		break;
> +	default:
> +		dev_err(&pdev->dev, "Unknown device type %d\n",
> +						(unsigned int)type);
> +		return -EINVAL;
> +	}
>  
> -	ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs,
> -				   ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
> +	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
> +				   subdevs, n_subdevs, NULL, 0, NULL);
>  	if (ret) {
>  		dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
>  		return ret;
> @@ -77,16 +117,10 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
>  	return 0;
>  }
>  
> -static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
> -	{ .compatible = "hisilicon,hi6421-pmic", },
> -	{ },
> -};
> -MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
> -
>  static struct platform_driver hi6421_pmic_driver = {
>  	.driver = {
> -		.name	= "hi6421_pmic",
> -		.of_match_table = of_hi6421_pmic_match_tbl,
> +		.name = "hi6421_pmic",
> +		.of_match_table = of_hi6421_pmic_match,
>  	},
>  	.probe	= hi6421_pmic_probe,
>  };
> diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h
> index 587273e..2580c08 100644
> --- a/include/linux/mfd/hi6421-pmic.h
> +++ b/include/linux/mfd/hi6421-pmic.h
> @@ -38,4 +38,9 @@ struct hi6421_pmic {
>  	struct regmap		*regmap;
>  };
>  
> +enum hi6421_type {
> +	HI6421 = 0,
> +	HI6421_V530,
> +};
> +
>  #endif		/* __HI6421_PMIC_H */
Lee Jones July 3, 2017, 12:01 p.m. UTC | #3
On Mon, 03 Jul 2017, Lee Jones wrote:

> On Fri, 09 Jun 2017, Guodong Xu wrote:
> 
> > Add support for HiSilicon Hi6421v530 PMIC. Hi6421v530 communicates with
> > main SoC via memory-mapped I/O.
> > 
> > Hi6421v530 and Hi6421 are PMIC chips from the same vendor, HiSilicon,
> > but at different revisions. They share the same memory-mapped I/O
> > design. They differ in integrated devices, such as regulator details,
> > LDO voltage points.
> > 
> > Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
> > Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
> > Acked-by: Arnd Bergmann <arnd@arndb.de>
> > ---
> >  drivers/mfd/hi6421-pmic-core.c  | 70 ++++++++++++++++++++++++++++++-----------
> >  include/linux/mfd/hi6421-pmic.h |  5 +++
> >  2 files changed, 57 insertions(+), 18 deletions(-)
> 
> For my own reference:
>   Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
> 
> Plan is to apply this set after the merge-window closes.

In order to make this process as easy as possible, can you rebase this
set on v4.13-rc1 and apply my Ack to this patch please?

> > diff --git a/drivers/mfd/hi6421-pmic-core.c b/drivers/mfd/hi6421-pmic-core.c
> > index b1139d4..6fb7ba2 100644
> > --- a/drivers/mfd/hi6421-pmic-core.c
> > +++ b/drivers/mfd/hi6421-pmic-core.c
> > @@ -1,9 +1,9 @@
> >  /*
> > - * Device driver for Hi6421 IC
> > + * Device driver for Hi6421 PMIC
> >   *
> >   * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
> >   *              http://www.hisilicon.com
> > - * Copyright (c) <2013-2014> Linaro Ltd.
> > + * Copyright (c) <2013-2017> Linaro Ltd.
> >   *              http://www.linaro.org
> >   *
> >   * Author: Guodong Xu <guodong.xu@linaro.org>
> > @@ -16,16 +16,20 @@
> >  #include <linux/device.h>
> >  #include <linux/err.h>
> >  #include <linux/mfd/core.h>
> > +#include <linux/mfd/hi6421-pmic.h>
> >  #include <linux/module.h>
> > -#include <linux/of.h>
> > +#include <linux/of_device.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/regmap.h>
> > -#include <linux/mfd/hi6421-pmic.h>
> >  
> >  static const struct mfd_cell hi6421_devs[] = {
> >  	{ .name = "hi6421-regulator", },
> >  };
> >  
> > +static const struct mfd_cell hi6421v530_devs[] = {
> > +	{ .name = "hi6421v530-regulator", },
> > +};
> > +
> >  static const struct regmap_config hi6421_regmap_config = {
> >  	.reg_bits = 32,
> >  	.reg_stride = 4,
> > @@ -33,12 +37,33 @@ static const struct regmap_config hi6421_regmap_config = {
> >  	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
> >  };
> >  
> > +static const struct of_device_id of_hi6421_pmic_match[] = {
> > +	{
> > +		.compatible = "hisilicon,hi6421-pmic",
> > +		.data = (void *)HI6421
> > +	},
> > +	{
> > +		.compatible = "hisilicon,hi6421v530-pmic",
> > +		.data = (void *)HI6421_V530
> > +	},
> > +	{ },
> > +};
> > +MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
> > +
> >  static int hi6421_pmic_probe(struct platform_device *pdev)
> >  {
> >  	struct hi6421_pmic *pmic;
> >  	struct resource *res;
> > +	const struct of_device_id *id;
> > +	const struct mfd_cell *subdevs;
> > +	enum hi6421_type type;
> >  	void __iomem *base;
> > -	int ret;
> > +	int n_subdevs, ret;
> > +
> > +	id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
> > +	if (!id)
> > +		return -EINVAL;
> > +	type = (enum hi6421_type)id->data;
> >  
> >  	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
> >  	if (!pmic)
> > @@ -57,18 +82,33 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
> >  		return PTR_ERR(pmic->regmap);
> >  	}
> >  
> > -	/* set over-current protection debounce 8ms */
> > -	regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
> > +	platform_set_drvdata(pdev, pmic);
> > +
> > +	switch (type) {
> > +	case HI6421:
> > +		/* set over-current protection debounce 8ms */
> > +		regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
> >  				(HI6421_OCP_DEB_SEL_MASK
> >  				 | HI6421_OCP_EN_DEBOUNCE_MASK
> >  				 | HI6421_OCP_AUTO_STOP_MASK),
> >  				(HI6421_OCP_DEB_SEL_8MS
> >  				 | HI6421_OCP_EN_DEBOUNCE_ENABLE));
> >  
> > -	platform_set_drvdata(pdev, pmic);
> > +		subdevs = hi6421_devs;
> > +		n_subdevs = ARRAY_SIZE(hi6421_devs);
> > +		break;
> > +	case HI6421_V530:
> > +		subdevs = hi6421v530_devs;
> > +		n_subdevs = ARRAY_SIZE(hi6421v530_devs);
> > +		break;
> > +	default:
> > +		dev_err(&pdev->dev, "Unknown device type %d\n",
> > +						(unsigned int)type);
> > +		return -EINVAL;
> > +	}
> >  
> > -	ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs,
> > -				   ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
> > +	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
> > +				   subdevs, n_subdevs, NULL, 0, NULL);
> >  	if (ret) {
> >  		dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
> >  		return ret;
> > @@ -77,16 +117,10 @@ static int hi6421_pmic_probe(struct platform_device *pdev)
> >  	return 0;
> >  }
> >  
> > -static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
> > -	{ .compatible = "hisilicon,hi6421-pmic", },
> > -	{ },
> > -};
> > -MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
> > -
> >  static struct platform_driver hi6421_pmic_driver = {
> >  	.driver = {
> > -		.name	= "hi6421_pmic",
> > -		.of_match_table = of_hi6421_pmic_match_tbl,
> > +		.name = "hi6421_pmic",
> > +		.of_match_table = of_hi6421_pmic_match,
> >  	},
> >  	.probe	= hi6421_pmic_probe,
> >  };
> > diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h
> > index 587273e..2580c08 100644
> > --- a/include/linux/mfd/hi6421-pmic.h
> > +++ b/include/linux/mfd/hi6421-pmic.h
> > @@ -38,4 +38,9 @@ struct hi6421_pmic {
> >  	struct regmap		*regmap;
> >  };
> >  
> > +enum hi6421_type {
> > +	HI6421 = 0,
> > +	HI6421_V530,
> > +};
> > +
> >  #endif		/* __HI6421_PMIC_H */
>
diff mbox

Patch

diff --git a/drivers/mfd/hi6421-pmic-core.c b/drivers/mfd/hi6421-pmic-core.c
index b1139d4..6fb7ba2 100644
--- a/drivers/mfd/hi6421-pmic-core.c
+++ b/drivers/mfd/hi6421-pmic-core.c
@@ -1,9 +1,9 @@ 
 /*
- * Device driver for Hi6421 IC
+ * Device driver for Hi6421 PMIC
  *
  * Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd.
  *              http://www.hisilicon.com
- * Copyright (c) <2013-2014> Linaro Ltd.
+ * Copyright (c) <2013-2017> Linaro Ltd.
  *              http://www.linaro.org
  *
  * Author: Guodong Xu <guodong.xu@linaro.org>
@@ -16,16 +16,20 @@ 
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/mfd/core.h>
+#include <linux/mfd/hi6421-pmic.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
-#include <linux/mfd/hi6421-pmic.h>
 
 static const struct mfd_cell hi6421_devs[] = {
 	{ .name = "hi6421-regulator", },
 };
 
+static const struct mfd_cell hi6421v530_devs[] = {
+	{ .name = "hi6421v530-regulator", },
+};
+
 static const struct regmap_config hi6421_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
@@ -33,12 +37,33 @@  static const struct regmap_config hi6421_regmap_config = {
 	.max_register = HI6421_REG_TO_BUS_ADDR(HI6421_REG_MAX),
 };
 
+static const struct of_device_id of_hi6421_pmic_match[] = {
+	{
+		.compatible = "hisilicon,hi6421-pmic",
+		.data = (void *)HI6421
+	},
+	{
+		.compatible = "hisilicon,hi6421v530-pmic",
+		.data = (void *)HI6421_V530
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match);
+
 static int hi6421_pmic_probe(struct platform_device *pdev)
 {
 	struct hi6421_pmic *pmic;
 	struct resource *res;
+	const struct of_device_id *id;
+	const struct mfd_cell *subdevs;
+	enum hi6421_type type;
 	void __iomem *base;
-	int ret;
+	int n_subdevs, ret;
+
+	id = of_match_device(of_hi6421_pmic_match, &pdev->dev);
+	if (!id)
+		return -EINVAL;
+	type = (enum hi6421_type)id->data;
 
 	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
 	if (!pmic)
@@ -57,18 +82,33 @@  static int hi6421_pmic_probe(struct platform_device *pdev)
 		return PTR_ERR(pmic->regmap);
 	}
 
-	/* set over-current protection debounce 8ms */
-	regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
+	platform_set_drvdata(pdev, pmic);
+
+	switch (type) {
+	case HI6421:
+		/* set over-current protection debounce 8ms */
+		regmap_update_bits(pmic->regmap, HI6421_OCP_DEB_CTRL_REG,
 				(HI6421_OCP_DEB_SEL_MASK
 				 | HI6421_OCP_EN_DEBOUNCE_MASK
 				 | HI6421_OCP_AUTO_STOP_MASK),
 				(HI6421_OCP_DEB_SEL_8MS
 				 | HI6421_OCP_EN_DEBOUNCE_ENABLE));
 
-	platform_set_drvdata(pdev, pmic);
+		subdevs = hi6421_devs;
+		n_subdevs = ARRAY_SIZE(hi6421_devs);
+		break;
+	case HI6421_V530:
+		subdevs = hi6421v530_devs;
+		n_subdevs = ARRAY_SIZE(hi6421v530_devs);
+		break;
+	default:
+		dev_err(&pdev->dev, "Unknown device type %d\n",
+						(unsigned int)type);
+		return -EINVAL;
+	}
 
-	ret = devm_mfd_add_devices(&pdev->dev, 0, hi6421_devs,
-				   ARRAY_SIZE(hi6421_devs), NULL, 0, NULL);
+	ret = devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
+				   subdevs, n_subdevs, NULL, 0, NULL);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to add child devices: %d\n", ret);
 		return ret;
@@ -77,16 +117,10 @@  static int hi6421_pmic_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id of_hi6421_pmic_match_tbl[] = {
-	{ .compatible = "hisilicon,hi6421-pmic", },
-	{ },
-};
-MODULE_DEVICE_TABLE(of, of_hi6421_pmic_match_tbl);
-
 static struct platform_driver hi6421_pmic_driver = {
 	.driver = {
-		.name	= "hi6421_pmic",
-		.of_match_table = of_hi6421_pmic_match_tbl,
+		.name = "hi6421_pmic",
+		.of_match_table = of_hi6421_pmic_match,
 	},
 	.probe	= hi6421_pmic_probe,
 };
diff --git a/include/linux/mfd/hi6421-pmic.h b/include/linux/mfd/hi6421-pmic.h
index 587273e..2580c08 100644
--- a/include/linux/mfd/hi6421-pmic.h
+++ b/include/linux/mfd/hi6421-pmic.h
@@ -38,4 +38,9 @@  struct hi6421_pmic {
 	struct regmap		*regmap;
 };
 
+enum hi6421_type {
+	HI6421 = 0,
+	HI6421_V530,
+};
+
 #endif		/* __HI6421_PMIC_H */