linux-kernel - Re: [PATCH V3 4/5] Thermal: Add ST-Ericsson DB8500 thermal driver.

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Date:	Wed, 31 Oct 2012 08:03:54 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	"hongbo.zhang" <hongbo.zhang@...aro.org>
Cc:	linaro-dev@...ts.linaro.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, rui.zhang@...el.com,
	amit.kachhap@...aro.org, STEricsson_nomadik_linux@...t.st.com,
	kernel@...oocommunity.org, linaro-kernel@...ts.linaro.org,
	"hongbo.zhang" <hongbo.zhang@...aro.com>, patches@...aro.org
Subject: Re: [PATCH V3 4/5] Thermal: Add ST-Ericsson DB8500 thermal driver.

Sorry for late comments :(

On 30 October 2012 22:19, hongbo.zhang <hongbo.zhang@...aro.org> wrote:
> From: "hongbo.zhang" <hongbo.zhang@...aro.com>
>
> This diver is based on the thermal management framework in thermal_sys.c. A

s/diver/driver

> thermal zone device is created with the trip points to which cooling devices
> can be bound, the current cooling device is cpufreq, e.g. CPU frequency is
> clipped down to cool the CPU, and other cooling devices can be added and bound
> to the trip points dynamically.  The platform specific PRCMU interrupts are
> used to active thermal update when trip points are reached.
>
> Signed-off-by: hongbo.zhang <hongbo.zhang@...aro.com>
> ---
>  .../devicetree/bindings/thermal/db8500-thermal.txt |  40 ++
>  drivers/thermal/Kconfig                            |  20 +
>  drivers/thermal/Makefile                           |   2 +
>  drivers/thermal/db8500_cpufreq_cooling.c           | 108 +++++
>  drivers/thermal/db8500_thermal.c                   | 531 +++++++++++++++++++++
>  include/linux/platform_data/db8500_thermal.h       |  38 ++
>  6 files changed, 739 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/thermal/db8500-thermal.txt
>  create mode 100644 drivers/thermal/db8500_cpufreq_cooling.c
>  create mode 100644 drivers/thermal/db8500_thermal.c
>  create mode 100644 include/linux/platform_data/db8500_thermal.h
>
> diff --git a/Documentation/devicetree/bindings/thermal/db8500-thermal.txt b/Documentation/devicetree/bindings/thermal/db8500-thermal.txt
> new file mode 100644
> index 0000000..cab6916
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/db8500-thermal.txt
> @@ -0,0 +1,40 @@
> +* ST-Ericsson DB8500 Thermal
> +
> +** Thermal node properties:
> +
> +- compatible : "stericsson,db8500-thermal";
> +- reg : address range of the thermal sensor registers;
> +- interrupts : interrupts generated from PRCMU;
> +- interrupt-names : "IRQ_HOTMON_LOW" and "IRQ_HOTMON_HIGH";

Just mention here that below properties are optional or required.

> +- num-trips : number of total trip points;
> +- tripN-temp : temperature of trip point N, should be in ascending order;
> +- tripN-type : type of trip point N, should be one of "active" "passive" "hot" "critical";
> +- tripN-cdev-num : number of the cooling devices which can be bound to trip point N;
> +- tripN-cdev-nameM : name of the No. M cooling device of trip point N;

> diff --git a/drivers/thermal/db8500_thermal.c b/drivers/thermal/db8500_thermal.c

> +static int db8500_thermal_match_cdev(struct thermal_cooling_device *cdev,
> +               struct db8500_trip_point *trip_points)
> +{
> +       int i;
> +       char *cdev_name;
> +
> +       if (!strlen(cdev->type))
> +               return -EINVAL;
> +
> +       for (i = 0; i < COOLING_DEV_MAX; i++) {
> +               cdev_name = trip_points->cdev_name[i];
> +               if (!strcmp(cdev_name, cdev->type))

You can actually remove cdev_name variable. and use
if (!strcmp(trip_points->cdev_name[i], cdev->type))

> +                       return 0;
> +       }
> +
> +       return -ENODEV;
> +}

> +#ifdef CONFIG_OF
> +static struct db8500_thsens_platform_data*
> +               db8500_thermal_parse_dt(struct platform_device *pdev)
> +{

> +               for (j = 0; j < tmp_data; j++) {
> +                       sprintf(prop_name, "trip%d-cdev-name%d", i, j);
> +                       if (of_property_read_string(np, prop_name, &tmp_str))
> +                               goto err_parse_dt;
> +
> +                       if (strlen(tmp_str) > THERMAL_NAME_LENGTH)
> +                               goto err_parse_dt;
> +
> +                       strcpy(ptrips->trip_points[i].cdev_name[j], tmp_str);

want to check if it is copied or not??

> +               }
> +       }
> +       return ptrips;
> +
> +err_parse_dt:
> +       dev_err(&pdev->dev, "Parsing device tree data error.\n");
> +       return NULL;
> +}

After these please add my:

Reviewed-by: Viresh Kumar <viresh.kumar@...aro.org>
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