Re: [PATCH v2 10/16] iio: adc: sun4i-gpadc-iio: add support for A83T thermal sensor

From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Philipp Rossak <embed3d-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	mark.rutland-5wv7dgnIgG8@public.gmane.org,
	wens-jdAy2FN1RRM@public.gmane.org,
	linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org,
	jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	knaack.h-Mmb7MZpHnFY@public.gmane.org,
	lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org,
	pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org,
	davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org,
	hans.verkuil-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org,
	mchehab-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	rask-SivP7zSAdNDZaaYASwVUlg@public.gmane.org,
	clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	sean-hENCXIMQXOg@public.gmane.org,
	krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	quentin.schulz-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org,
	icenowy-h8G6r0blFSE@public.gmane.org,
	edu.molinas-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	singhalsimran0-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
Subject: Re: [PATCH v2 10/16] iio: adc: sun4i-gpadc-iio: add support for A83T thermal sensor
Date: Mon, 29 Jan 2018 10:48:03 +0100	[thread overview]
Message-ID: <20180129094803.uiojqkmaeuihbe4p@flea.lan> (raw)
In-Reply-To: <20180128232919.12639-11-embed3d-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

[-- Attachment #1: Type: text/plain, Size: 2088 bytes --]

On Mon, Jan 29, 2018 at 12:29:13AM +0100, Philipp Rossak wrote:
> This patch adds support for the A83T ths sensor.
> 
> The A83T supports interrupts. The interrupt is configured to update the
> the sensor values every second.
> 
> Signed-off-by: Philipp Rossak <embed3d-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/iio/adc/sun4i-gpadc-iio.c | 38 ++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/sun4i-gpadc.h   | 18 ++++++++++++++++++
>  2 files changed, 56 insertions(+)
> 
> diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
> index 8196203d65fe..9f7895ba1966 100644
> --- a/drivers/iio/adc/sun4i-gpadc-iio.c
> +++ b/drivers/iio/adc/sun4i-gpadc-iio.c
> @@ -170,6 +170,40 @@ static const struct gpadc_data sun8i_h3_ths_data = {
>  		SUN8I_H3_THS_TEMP_PERIOD(0x7),
>  };
>  
> +static const struct gpadc_data sun8i_a83t_ths_data = {
> +	.temp_offset = -2724,
> +	.temp_scale = -70,
> +	.temp_data = {SUN8I_H3_THS_TDATA0,
> +		SUN8I_A83T_THS_TDATA1,
> +		SUN8I_A83T_THS_TDATA2,
> +		0},
> +	.sample_start = sunxi_ths_sample_start,
> +	.sample_end = sunxi_ths_sample_end,
> +	.sensor_count = 3,
> +	.supports_nvmem = false,
> +	.support_irq = true,
> +	.ctrl0_map = SUN4I_GPADC_CTRL0_T_ACQ(0x1f3),
> +	.ctrl2_map = SUN8I_H3_THS_ACQ1(0x1f3),

Where are these values coming from?

> +	.sensor_en_map = SUN8I_H3_THS_TEMP_SENSE_EN0 |
> +		SUN8I_A83T_THS_TEMP_SENSE_EN1 |
> +		SUN8I_A83T_THS_TEMP_SENSE_EN2,
> +	.filter_map = SUN4I_GPADC_CTRL3_FILTER_EN |
> +		SUN4I_GPADC_CTRL3_FILTER_TYPE(0x2),
> +	.irq_clear_map = SUN8I_H3_THS_INTS_ALARM_INT_0 |
> +		SUN8I_A83T_THS_INTS_ALARM_INT_1 |
> +		SUN8I_A83T_THS_INTS_ALARM_INT_2 |
> +		SUN8I_H3_THS_INTS_SHUT_INT_0  |
> +		SUN8I_A83T_THS_INTS_SHUT_INT_1  |
> +		SUN8I_A83T_THS_INTS_SHUT_INT_2  |
> +		SUN8I_H3_THS_INTS_TDATA_IRQ_0 |
> +		SUN8I_A83T_THS_INTS_TDATA_IRQ_1 |
> +		SUN8I_A83T_THS_INTS_TDATA_IRQ_2,

Do you reall need to clear all these interrupts if you're using only
one?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com