linux-kernel - Re: [PATCH 3/4] mfd: tps65217: remove duplicated interrupt resources.

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Date:   Mon, 12 Jun 2017 17:41:22 -0500
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        <linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
CC:     Tony Lindgren <tony@...mide.com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>, <javier@...hile0.org>
Subject: Re: [PATCH 3/4] mfd: tps65217: remove duplicated interrupt resources.



On 06/12/2017 04:24 PM, Enric Balletbo i Serra wrote:
> I don't think it makes sense to have the interrupt resources for charger
> and power button in two different places, the driver and the DT binding.
> That's confusing so remove the ones from the mfd driver in favour of
> having the interrupt resources only described in the DT. Having the
> resources in DT may help if there is or will be a similar pmic with
> different resource allocation.

Wouldn't this break DT compatibility? Old DTs do not contain IRQ resources
and so they work only because of IRQ definitions in code.

> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
>   drivers/mfd/tps65217.c | 22 +---------------------
>   1 file changed, 1 insertion(+), 21 deletions(-)
> 
> diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
> index f769c7d..fd83bae 100644
> --- a/drivers/mfd/tps65217.c
> +++ b/drivers/mfd/tps65217.c
> @@ -33,15 +33,6 @@
>   #include <linux/mfd/core.h>
>   #include <linux/mfd/tps65217.h>
>   
> -static struct resource charger_resources[] = {
> -	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
> -	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
> -};
> -
> -static struct resource pb_resources[] = {
> -	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
> -};
> -
>   static void tps65217_irq_lock(struct irq_data *data)
>   {
>   	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
> @@ -97,14 +88,10 @@ static struct mfd_cell tps65217s[] = {
>   	},
>   	{
>   		.name = "tps65217-charger",
> -		.num_resources = ARRAY_SIZE(charger_resources),
> -		.resources = charger_resources,
>   		.of_compatible = "ti,tps65217-charger",
>   	},
>   	{
>   		.name = "tps65217-pwrbutton",
> -		.num_resources = ARRAY_SIZE(pb_resources),
> -		.resources = pb_resources,
>   		.of_compatible = "ti,tps65217-pwrbutton",
>   	},
>   };
> @@ -359,15 +346,8 @@ static int tps65217_probe(struct i2c_client *client,
>   		return ret;
>   	}
>   
> -	if (client->irq) {
> +	if (client->irq)
>   		tps65217_irq_init(tps, client->irq);
> -	} else {
> -		int i;
> -
> -		/* Don't tell children about IRQ resources which won't fire */
> -		for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
> -			tps65217s[i].num_resources = 0;
> -	}
>   
>   	ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
>   				   ARRAY_SIZE(tps65217s), NULL, 0,
> 

-- 
regards,
-grygorii