linux-kernel - Re: [PATCH 7/9] mfd: tps65218: add version check to the PMIC probe

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Date:	Mon, 20 Jun 2016 14:15:55 +0530
From:	Keerthy <a0393675@...com>
To:	Keerthy <j-keerthy@...com>, <tony@...mide.com>,
	<broonie@...nel.org>, <devicetree@...r.kernel.org>,
	Lee Jones <lee.jones@...aro.org>
CC:	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<t-kristo@...com>, <russ.dill@...com>, <robh+dt@...nel.org>,
	<mark.rutland@....com>, <linux@...linux.org.uk>,
	Dave Gerlach <d-gerlach@...com>
Subject: Re: [PATCH 7/9] mfd: tps65218: add version check to the PMIC probe



On Monday 20 June 2016 02:13 PM, Keerthy wrote:
> From: Tero Kristo <t-kristo@...com>
>
> Version information will be needed to handle some error cases under the
> regulator driver, so store the information once during MFD probe.

+ Lee Jones.

>
> Signed-off-by: Tero Kristo <t-kristo@...com>
> Signed-off-by: Dave Gerlach <d-gerlach@...com>
> Signed-off-by: Keerthy <j-keerthy@...com>
> ---
>   drivers/mfd/tps65218.c       | 9 +++++++++
>   include/linux/mfd/tps65218.h | 1 +
>   2 files changed, 10 insertions(+)
>
> diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
> index 80b9dc3..ba610ad 100644
> --- a/drivers/mfd/tps65218.c
> +++ b/drivers/mfd/tps65218.c
> @@ -219,6 +219,7 @@ static int tps65218_probe(struct i2c_client *client,
>   	struct tps65218 *tps;
>   	const struct of_device_id *match;
>   	int ret;
> +	unsigned int chipid;
>
>   	match = of_match_device(of_tps65218_match_table, &client->dev);
>   	if (!match) {
> @@ -250,6 +251,14 @@ static int tps65218_probe(struct i2c_client *client,
>   	if (ret < 0)
>   		return ret;
>
> +	ret = tps65218_reg_read(tps, TPS65218_REG_CHIPID, &chipid);
> +	if (ret) {
> +		dev_err(tps->dev, "Failed to read chipid: %d\n", ret);
> +		return ret;
> +	}
> +
> +	tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
> +
>   	ret = of_platform_populate(client->dev.of_node, NULL, NULL,
>   				   &client->dev);
>   	if (ret < 0)
> diff --git a/include/linux/mfd/tps65218.h b/include/linux/mfd/tps65218.h
> index 7fdf532..85e464e 100644
> --- a/include/linux/mfd/tps65218.h
> +++ b/include/linux/mfd/tps65218.h
> @@ -267,6 +267,7 @@ struct tps_info {
>   struct tps65218 {
>   	struct device *dev;
>   	unsigned int id;
> +	u8 rev;
>
>   	struct mutex tps_lock;		/* lock guarding the data structure */
>   	/* IRQ Data */
>