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From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Yangtao Li <tiny.windzz@gmail.com>
Cc: rui.zhang@intel.com, edubezval@gmail.com,
	daniel.lezcano@linaro.org, robh+dt@kernel.org,
	mark.rutland@arm.com, wens@csie.org, mchehab+samsung@kernel.org,
	davem@davemloft.net, gregkh@linuxfoundation.org,
	Jonathan.Cameron@huawei.com, nicolas.ferre@microchip.com,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Icenowy Zheng <icenowy@aosc.io>
Subject: Re: [PATCH v5 15/18] thermal: sun8i: allow to use custom temperature calculation function
Date: Mon, 12 Aug 2019 10:49:15 +0200
Message-ID: <20190812084915.lasb4dh25bfeoigr@flea> (raw)
In-Reply-To: <20190810052829.6032-16-tiny.windzz@gmail.com>

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Hi,

On Sat, Aug 10, 2019 at 05:28:26AM +0000, Yangtao Li wrote:
> From: Icenowy Zheng <icenowy@aosc.io>
>
> The H5 temperature calculation function is strange. Firstly, it's
> segmented. Secondly, the formula of two sensors are different in the
> second segment.
>
> Allow to use a custom temperature calculation function, in case of
> the function is complex.
>
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>

When you send a patch on someone else's behalf, you need to put your
Signed-off-by as well.

> ---
>  drivers/thermal/sun8i_thermal.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
> index 3259081da841..a761e2afda08 100644
> --- a/drivers/thermal/sun8i_thermal.c
> +++ b/drivers/thermal/sun8i_thermal.c
> @@ -76,6 +76,7 @@ struct ths_thermal_chip {
>  				     u16 *caldata, int callen);
>  	int		(*init)(struct ths_device *tmdev);
>  	int             (*irq_ack)(struct ths_device *tmdev);
> +	int		(*calc_temp)(int id, int reg);
>  };
>
>  struct ths_device {
> @@ -90,9 +91,12 @@ struct ths_device {
>
>  /* Temp Unit: millidegree Celsius */
>  static int sun8i_ths_reg2temp(struct ths_device *tmdev,
> -			      int reg)
> +			      int id, int reg)
>  {
> -	return (reg + tmdev->chip->offset) * tmdev->chip->scale;
> +	if (tmdev->chip->calc_temp)
> +		return tmdev->chip->calc_temp(id, reg);
> +	else
> +		return (reg + tmdev->chip->offset) * tmdev->chip->scale;

You're not consistent here compared to the other callbacks you have
introduced: calibrate, init and irq_ack all need to be set and will
fail (hard) if you don't set them, yet this one will have a different
behaviour (that behaviour being to use the H6 formula, which is the
latest SoC, which is a bit odd in itself).

I guess we should either make it mandatory as the rest of the
callbacks, or document which callbacks are mandatory and which are
optional (and the behaviour when it's optional).

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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  reply index

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-10  5:28 [PATCH v5 00/18] add thermal driver for h6 Yangtao Li
2019-08-10  5:28 ` [PATCH v5 01/18] thermal: sun8i: " Yangtao Li
2019-09-01  2:06   ` Ondřej Jirman
2019-09-01 21:04   ` Ondřej Jirman
2019-08-10  5:28 ` [PATCH v5 02/18] dt-bindings: thermal: add binding document for h6 thermal controller Yangtao Li
2019-08-12  8:56   ` Maxime Ripard
2019-08-12 23:40     ` Frank Lee
2019-08-16  9:47       ` Maxime Ripard
2019-08-10  5:28 ` [PATCH v5 03/18] thermal: fix indentation in makefile Yangtao Li
2019-08-28 12:40   ` Zhang Rui
2019-08-10  5:28 ` [PATCH v5 04/18] thermal: sun8i: get ths sensor number from device compatible Yangtao Li
2019-08-10  5:28 ` [PATCH v5 05/18] thermal: sun8i: rework for sun8i_ths_get_temp() Yangtao Li
2019-08-10  5:28 ` [PATCH v5 06/18] thermal: sun8i: get ths init func from device compatible Yangtao Li
2019-08-10  5:28 ` [PATCH v5 07/18] thermal: sun8i: rework for ths irq handler func Yangtao Li
2019-08-10  5:28 ` [PATCH v5 08/18] thermal: sun8i: support mod clocks Yangtao Li
2019-08-10  6:16   ` Vasily Khoruzhick
2019-08-12 23:46     ` Frank Lee
2019-08-12 23:54       ` Vasily Khoruzhick
2019-08-13 20:06         ` Ondřej Jirman
2019-08-14  3:01           ` Vasily Khoruzhick
2019-08-25 16:14             ` Frank Lee
2019-10-21  3:41               ` Vasily Khoruzhick
2019-08-10  5:28 ` [PATCH v5 09/18] thermal: sun8i: rework for ths calibrate func Yangtao Li
2019-08-28 12:45   ` Zhang Rui
2019-08-10  5:28 ` [PATCH v5 10/18] dt-bindings: thermal: add binding document for h3 thermal controller Yangtao Li
2019-08-27 15:26   ` Rob Herring
2019-08-10  5:28 ` [PATCH v5 11/18] thermal: sun8i: add thermal driver for h3 Yangtao Li
2019-08-10  5:28 ` [PATCH v5 12/18] dt-bindings: thermal: add binding document for a64 thermal controller Yangtao Li
2019-08-27 15:26   ` Rob Herring
2019-08-10  5:28 ` [PATCH v5 13/18] thermal: sun8i: add thermal driver for A64 Yangtao Li
2019-08-10  5:28 ` [PATCH v5 14/18] dt-bindings: thermal: add binding document for h5 thermal controller Yangtao Li
2019-08-27 15:27   ` Rob Herring
2019-08-10  5:28 ` [PATCH v5 15/18] thermal: sun8i: allow to use custom temperature calculation function Yangtao Li
2019-08-12  8:49   ` Maxime Ripard [this message]
2019-08-10  5:28 ` [PATCH v5 16/18] thermal: sun8i: add support for Allwinner H5 thermal sensor Yangtao Li
2019-08-10  5:28 ` [PATCH v5 17/18] dt-bindings: thermal: add binding document for r40 thermal controller Yangtao Li
2019-08-27 15:27   ` Rob Herring
2019-08-10  5:28 ` [PATCH v5 18/18] thermal: sun8i: add support for Allwinner R40 thermal sensor Yangtao Li
2019-08-11 21:14 ` [PATCH v5 00/18] add thermal driver for h6 Clément Péron
2019-08-12 23:36   ` Frank Lee
2019-09-01 21:52 ` Ondřej Jirman
2019-09-02  7:27   ` Maxime Ripard
2019-09-02 10:58     ` Ondřej Jirman
2019-11-26 19:36       ` Vasily Khoruzhick

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