linux-kernel - Re: [PATCH v2] mfd: intel_soc_pmic_bxtwc: Add Intel BXT WhiskeyCove PMIC ADC thermal channel-zone mapping

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Message-ID: <20160620085200.GB1465@dell>
Date:	Mon, 20 Jun 2016 09:52:00 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Bin Gao <bin.gao@...ux.intel.com>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	linux-kernel@...r.kernel.org, ysiyer <yegnesh.s.iyer@...el.com>,
	Ajay Thomas <ajay.thomas.david.rajamanickam@...el.com>,
	Bin Gao <bin.gao@...el.com>, broonie@...nel.org
Subject: Re: [PATCH v2] mfd: intel_soc_pmic_bxtwc: Add Intel BXT WhiskeyCove
 PMIC ADC thermal channel-zone mapping

On Mon, 20 Jun 2016, Lee Jones wrote:
> On Sun, 19 Jun 2016, Bin Gao wrote:

> > On Fri, Jun 17, 2016 at 09:01:59AM +0100, Lee Jones wrote:
> > > > +static struct trip_config_map str0_trip_config[] = {
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x01,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x01,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x01,
> > > > +		.trip_num = 0
> > > > +	},
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x10,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x10,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x10,
> > > > +		.trip_num = 1
> > > > +	}
> > > > +};
> > > > +
> > > > +static struct trip_config_map str1_trip_config[] = {
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x02,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x02,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x02,
> > > > +		.trip_num = 0
> > > > +	},
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x20,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x20,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x20,
> > > > +		.trip_num = 1
> > > > +	},
> > > > +};
> > > > +
> > > > +static struct trip_config_map str2_trip_config[] = {
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x04,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x04,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x04,
> > > > +		.trip_num = 0
> > > > +	},
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM0IRQ,
> > > > +		.irq_mask = 0x40,
> > > > +		.irq_en = BXTWC_MTHRM0IRQ,
> > > > +		.irq_en_mask = 0x40,
> > > > +		.evt_stat = BXTWC_STHRM0IRQ,
> > > > +		.evt_mask = 0x40,
> > > > +		.trip_num = 1
> > > > +	},
> > > > +};
> > > > +
> > > > +static struct trip_config_map str3_trip_config[] = {
> > > > +	{
> > > > +		.irq_reg = BXTWC_THRM2IRQ,
> > > > +		.irq_mask = 0x10,
> > > > +		.irq_en = BXTWC_MTHRM2IRQ,
> > > > +		.irq_en_mask = 0x10,
> > > > +		.evt_stat = BXTWC_STHRM2IRQ,
> > > > +		.evt_mask = 0x10,
> > > > +		.trip_num = 0
> > > > +	},
> > > > +};
> > > 
> > > This looks like a register map to me.
> > > 
> > > Can you use the regmap framework instead?
> > 
> > These are platform data used by another driver(thermal driver) which
> > uses regmap framework to access some of the fields of the structure(
> > irq_reg, irq_en and evt_stat).
> 
> I suggest you create the regmap here and pass it to the thermal driver
> instead.

Better yet, why don't you just create the regmap in the thermal
driver?  There is no need (in fact, it's not even allowed) to pass
register addresses though platform data.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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