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Date: Tue, 8 Dec 2015 13:03:17 +0700
From: Khiem Nguyen <khiem.nguyen.xt@....renesas.com>
To: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
CC: Simon <horms@...ge.net.au>, Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <edubezval@...il.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Magnus <magnus.damm@...il.com>,
"linux-sh@...r.kernel.org" <linux-sh@...r.kernel.org>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Khiem Nguyen <khiem.nguyen.xt@....renesas.com>,
Toru Oishi <toru.oishi.zj@....renesas.com>,
"Hien Duy. Dang" <hien.dang.eb@....renesas.com>
Subject: Re: [PATCH 5/8 v4] thermal: rcar: enable to use thermal-zone on DT
Hi Morimoto-san,
Sorry for late information in v3.
There's a small mistake in example in DT binding documentation.
Anyway, let's wait for more comments from other developers before fixing it.
On 12/8/2015 12:28 PM, Kuninori Morimoto wrote:
>
> From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
>
> This patch enables to use thermal-zone on DT if it was call as
> "renesas,rcar-gen2-thermal".
> Previous style is still supported by "renesas,rcar-thermal".
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
> ---
> v3 -> v4
>
> - no change
>
> .../devicetree/bindings/thermal/rcar-thermal.txt | 37 +++++++++++++++++-
> drivers/thermal/rcar_thermal.c | 44 +++++++++++++++++++---
> 2 files changed, 74 insertions(+), 7 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> index 332e625..601a54d 100644
> --- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> +++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
> @@ -1,8 +1,9 @@
> * Renesas R-Car Thermal
>
> Required properties:
> -- compatible : "renesas,thermal-<soctype>", "renesas,rcar-thermal"
> - as fallback.
> +- compatible : "renesas,thermal-<soctype>",
> + "renesas,rcar-gen2-thermal" (with thermal-zone) or
> + "renesas,rcar-thermal" (without thermal-zone) as fallback.
> Examples with soctypes are:
> - "renesas,thermal-r8a73a4" (R-Mobile APE6)
> - "renesas,thermal-r8a7779" (R-Car H1)
> @@ -36,3 +37,35 @@ thermal@...f0000 {
> 0xe61f0300 0x38>;
> interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
> };
> +
> +Example (with thermal-zone):
> +
> +thermal-zones {
> + cpu_thermal: cpu-thermal {
> + polling-delay-passive = <1000>;
> + polling-delay = <5000>;
> +
> + thermal-sensors = <&thermal>;
> +
> + trips {
> + cpu-crit {
> + temperature = <1150000>;
One zero is redundant here. It should be 115000.
Even though this is an example, the value 1150000 millicelcius degree is
too big for existing R-Car systems :)
> + hysteresis = <0>;
> + type = "critical";
> + };
> + };
> + cooling-maps {
> + };
> + };
> +};
> +
> +thermal: thermal@...f0000 {
> + compatible = "renesas,thermal-r8a7790",
> + "renesas,rcar-gen2-thermal",
> + "renesas,rcar-thermal";
> + reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>;
> + interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&mstp5_clks R8A7790_CLK_THERMAL>;
> + power-domains = <&cpg_clocks>;
> + #thermal-sensor-cells = <0>;
> +};
> diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
> index 40c3ba5..d4d2661 100644
> --- a/drivers/thermal/rcar_thermal.c
> +++ b/drivers/thermal/rcar_thermal.c
> @@ -23,6 +23,7 @@
> #include <linux/interrupt.h>
> #include <linux/io.h>
> #include <linux/module.h>
> +#include <linux/of_device.h>
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/reboot.h>
> @@ -81,8 +82,10 @@ struct rcar_thermal_priv {
> # define rcar_force_update_temp(priv) 0
> #endif
>
> +#define USE_OF_THERMAL 1
> static const struct of_device_id rcar_thermal_dt_ids[] = {
> { .compatible = "renesas,rcar-thermal", },
> + { .compatible = "renesas,rcar-gen2-thermal", .data = (void *)USE_OF_THERMAL },
> {},
> };
> MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);
> @@ -206,9 +209,8 @@ err_out_unlock:
> return ret;
> }
>
> -static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
> +static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv, int *temp)
> {
> - struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
> int tmp;
>
> if (!rcar_has_irq_support(priv) || rcar_force_update_temp(priv)) {
> @@ -234,6 +236,20 @@ static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
> return 0;
> }
>
> +static int rcar_thermal_of_get_temp(void *data, int *temp)
> +{
> + struct rcar_thermal_priv *priv = data;
> +
> + return rcar_thermal_get_current_temp(priv, temp);
> +}
> +
> +static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
> +{
> + struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
> +
> + return rcar_thermal_get_current_temp(priv, temp);
> +}
> +
> static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,
> int trip, enum thermal_trip_type *type)
> {
> @@ -290,6 +306,10 @@ static int rcar_thermal_notify(struct thermal_zone_device *zone,
> return 0;
> }
>
> +static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = {
> + .get_temp = rcar_thermal_of_get_temp,
> +};
> +
> static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
> .get_temp = rcar_thermal_get_temp,
> .get_trip_type = rcar_thermal_get_trip_type,
> @@ -326,14 +346,20 @@ static void rcar_thermal_work(struct work_struct *work)
>
> priv = container_of(work, struct rcar_thermal_priv, work.work);
>
> - rcar_thermal_get_temp(priv->zone, &cctemp);
> + ret = rcar_thermal_get_current_temp(priv, &cctemp);
> + if (ret < 0)
> + return;
> +
> ret = rcar_thermal_update_temp(priv);
> if (ret < 0)
> return;
>
> rcar_thermal_irq_enable(priv);
>
> - rcar_thermal_get_temp(priv->zone, &nctemp);
> + ret = rcar_thermal_get_current_temp(priv, &nctemp);
> + if (ret < 0)
> + return;
> +
> if (nctemp != cctemp)
> thermal_zone_device_update(priv->zone);
> }
> @@ -394,6 +420,8 @@ static int rcar_thermal_probe(struct platform_device *pdev)
> struct rcar_thermal_priv *priv;
> struct device *dev = &pdev->dev;
> struct resource *res, *irq;
> + const struct of_device_id *of_id = of_match_device(rcar_thermal_dt_ids, dev);
> + unsigned long of_data = (unsigned long)of_id->data;
> int mres = 0;
> int i;
> int ret = -ENODEV;
> @@ -452,7 +480,13 @@ static int rcar_thermal_probe(struct platform_device *pdev)
> if (ret < 0)
> goto error_unregister;
>
> - priv->zone = thermal_zone_device_register("rcar_thermal",
> + if (of_data == USE_OF_THERMAL)
> + priv->zone = thermal_zone_of_sensor_register(
> + dev, i, priv,
> + &rcar_thermal_zone_of_ops);
> + else
> + priv->zone = thermal_zone_device_register(
> + "rcar_thermal",
> 1, 0, priv,
> &rcar_thermal_zone_ops, NULL, 0,
> idle);
>
--
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