linux-kernel - Re: [PATCH v2 1/3] mfd: sec-core: Dump PMIC revision to find out the HW

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Message-ID: <20151013084729.GF32409@x1>
Date:	Tue, 13 Oct 2015 09:47:29 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Sangbeom Kim <sbkim73@...sung.com>, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Inki Dae <inki.dae@...sung.com>
Subject: Re: [PATCH v2 1/3] mfd: sec-core: Dump PMIC revision to find out the
 HW

On Wed, 07 Oct 2015, Krzysztof Kozlowski wrote:

> There are different revisions of the same chipset. For example S2MPS13 has
> more than 2 revisions. They differ slightly in regulator constraints.
> Print the revision number to easily find which PMIC is used on the board.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> 
> ---
> 
> Changs since v1:
> None.
> ---
>  drivers/mfd/sec-core.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)

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

> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> index 2d1137a7a0ee..589e5efc2d7f 100644
> --- a/drivers/mfd/sec-core.c
> +++ b/drivers/mfd/sec-core.c
> @@ -253,6 +253,15 @@ static const struct regmap_config s5m8767_regmap_config = {
>  	.cache_type = REGCACHE_FLAT,
>  };
>  
> +static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
> +{
> +	unsigned int val;
> +
> +	/* For each device type, the REG_ID is always the first register */
> +	if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
> +		dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
> +}
> +
>  #ifdef CONFIG_OF
>  /*
>   * Only the common platform data elements for s5m8767 are parsed here from the
> @@ -425,6 +434,7 @@ static int sec_pmic_probe(struct i2c_client *i2c,
>  		goto err_mfd;
>  
>  	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
> +	sec_pmic_dump_rev(sec_pmic);
>  
>  	return ret;
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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