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Date: Wed, 21 Nov 2018 09:43:46 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Andy Tang <andy.tang@....com>,
"rui.zhang@...el.com" <rui.zhang@...el.com>,
"edubezval@...il.com" <edubezval@...il.com>
Cc: "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] thermal: qoriq: add multiple sensors support
On 21/11/2018 02:34, Andy Tang wrote:
> Hi all,
>
> Do you have any comments on this patch?
>
> I found for our thermal driver(qoriq_thermal.c) there are different between the following two git trees:
> git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git
> branch: next
> git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal.git.
> branch: next
>
> Could you please clarify which git tree/branch should I use?
SoC changes are submitted against linux-soc-thermal.git.
Generic thermal framework are sent against Zhang Rui's tree but it
happens sometimes Eduardo pick them also when the changes are related to
SoC behavior.
However, I agree that can be confusing :)
Eduardo, Rui,
how about to add a section in the maintainer handbook for the thermal to
clarify the expectations and the flow?
>> -----Original Message-----
>> From: Andy Tang
>> Sent: 2018年11月14日 15:29
>> To: rui.zhang@...el.com; daniel.lezcano@...aro.org
>> Cc: edubezval@...il.com; linux-pm@...r.kernel.org;
>> linux-kernel@...r.kernel.org
>> Subject: RE: [PATCH v3] thermal: qoriq: add multiple sensors support
>>
>> PING.
>>
>> BR,
>> Andy
>>
>>> -----Original Message-----
>>> From: andy.tang@....com <andy.tang@....com>
>>> Sent: 2018年10月30日 9:00
>>> To: rui.zhang@...el.com; daniel.lezcano@...aro.org
>>> Cc: edubezval@...il.com; linux-pm@...r.kernel.org;
>>> linux-kernel@...r.kernel.org; Andy Tang <andy.tang@....com>
>>> Subject: [PATCH v3] thermal: qoriq: add multiple sensors support
>>>
>>> From: Yuantian Tang <andy.tang@....com>
>>>
>>> The QorIQ Layerscape SoC has several thermal sensors but the current
>>> driver only supports one.
>>>
>>> Massage the code to be sensor oriented and allow the support for
>>> multiple sensors.
>>>
>>> Signed-off-by: Yuantian Tang <andy.tang@....com>
>>> Reviewed-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>>> ---
>>> v3:
>>> - add Reviewed-by
>>> v2:
>>> - update the commit message
>>> - refine the qoriq_tmu_register_tmu_zone()
>>>
>>> drivers/thermal/qoriq_thermal.c | 100
>>> ++++++++++++++++++---------------------
>>> 1 files changed, 46 insertions(+), 54 deletions(-)
>>>
>>> diff --git a/drivers/thermal/qoriq_thermal.c
>>> b/drivers/thermal/qoriq_thermal.c index 450ed66..8beb344 100644
>>> --- a/drivers/thermal/qoriq_thermal.c
>>> +++ b/drivers/thermal/qoriq_thermal.c
>>> @@ -59,14 +59,21 @@ struct qoriq_tmu_regs {
>>> u32 ttr3cr; /* Temperature Range 3 Control Register */
>>> };
>>>
>>> +struct qoriq_tmu_data;
>>> +
>>> /*
>>> * Thermal zone data
>>> */
>>> +struct qoriq_sensor {
>>> + struct thermal_zone_device *tzd;
>>> + struct qoriq_tmu_data *qdata;
>>> + int id;
>>> +};
>>> +
>>> struct qoriq_tmu_data {
>>> - struct thermal_zone_device *tz;
>>> struct qoriq_tmu_regs __iomem *regs;
>>> - int sensor_id;
>>> bool little_endian;
>>> + struct qoriq_sensor *sensor[SITES_MAX];
>>> };
>>>
>>> static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem
>>> *addr) @@ -87,48 +94,51 @@ static u32 tmu_read(struct
>> qoriq_tmu_data
>>> *p, void __iomem *addr)
>>>
>>> static int tmu_get_temp(void *p, int *temp) {
>>> + struct qoriq_sensor *qsensor = p;
>>> + struct qoriq_tmu_data *qdata = qsensor->qdata;
>>> u32 val;
>>> - struct qoriq_tmu_data *data = p;
>>>
>>> - val = tmu_read(data, &data->regs->site[data->sensor_id].tritsr);
>>> + val = tmu_read(qdata, &qdata->regs->site[qsensor->id].tritsr);
>>> *temp = (val & 0xff) * 1000;
>>>
>>> return 0;
>>> }
>>>
>>> -static int qoriq_tmu_get_sensor_id(void)
>>> +static const struct thermal_zone_of_device_ops tmu_tz_ops = {
>>> + .get_temp = tmu_get_temp,
>>> +};
>>> +
>>> +static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
>>> {
>>> - int ret, id;
>>> - struct of_phandle_args sensor_specs;
>>> - struct device_node *np, *sensor_np;
>>> + struct qoriq_tmu_data *qdata = platform_get_drvdata(pdev);
>>> + int id, sites = 0;
>>>
>>> - np = of_find_node_by_name(NULL, "thermal-zones");
>>> - if (!np)
>>> - return -ENODEV;
>>> + for (id = 0; id < SITES_MAX; id++) {
>>> + qdata->sensor[id] = devm_kzalloc(&pdev->dev,
>>> + sizeof(struct qoriq_sensor), GFP_KERNEL);
>>> + if (!qdata->sensor[id])
>>> + return -ENOMEM;
>>>
>>> - sensor_np = of_get_next_child(np, NULL);
>>> - ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors",
>>> - "#thermal-sensor-cells",
>>> - 0, &sensor_specs);
>>> - if (ret) {
>>> - of_node_put(np);
>>> - of_node_put(sensor_np);
>>> - return ret;
>>> - }
>>> + qdata->sensor[id]->id = id;
>>> + qdata->sensor[id]->qdata = qdata;
>>>
>>> - if (sensor_specs.args_count >= 1) {
>>> - id = sensor_specs.args[0];
>>> - WARN(sensor_specs.args_count > 1,
>>> - "%s: too many cells in sensor specifier %d\n",
>>> - sensor_specs.np->name, sensor_specs.args_count);
>>> - } else {
>>> - id = 0;
>>> - }
>>> + qdata->sensor[id]->tzd =
>>> devm_thermal_zone_of_sensor_register(
>>> + &pdev->dev, id, qdata->sensor[id], &tmu_tz_ops);
>>> + if (IS_ERR(qdata->sensor[id]->tzd)) {
>>> + if (PTR_ERR(qdata->sensor[id]->tzd) == -ENODEV)
>>> + continue;
>>> + else
>>> + return PTR_ERR(qdata->sensor[id]->tzd);
>>>
>>> - of_node_put(np);
>>> - of_node_put(sensor_np);
>>> + }
>>> +
>>> + sites |= 0x1 << (15 - id);
>>> + }
>>> + /* Enable monitoring */
>>> + if (sites != 0)
>>> + tmu_write(qdata, sites | TMR_ME | TMR_ALPF,
>>> &qdata->regs->tmr);
>>>
>>> - return id;
>>> + return 0;
>>> }
>>>
>>> static int qoriq_tmu_calibration(struct platform_device *pdev) @@
>>> -178,16 +188,11 @@ static void qoriq_tmu_init_device(struct
>>> qoriq_tmu_data *data)
>>> tmu_write(data, TMR_DISABLE, &data->regs->tmr); }
>>>
>>> -static const struct thermal_zone_of_device_ops tmu_tz_ops = {
>>> - .get_temp = tmu_get_temp,
>>> -};
>>> -
>>> static int qoriq_tmu_probe(struct platform_device *pdev) {
>>> int ret;
>>> struct qoriq_tmu_data *data;
>>> struct device_node *np = pdev->dev.of_node;
>>> - u32 site;
>>>
>>> if (!np) {
>>> dev_err(&pdev->dev, "Device OF-Node is NULL"); @@ -203,13
>>> +208,6 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
>>>
>>> data->little_endian = of_property_read_bool(np, "little-endian");
>>>
>>> - data->sensor_id = qoriq_tmu_get_sensor_id();
>>> - if (data->sensor_id < 0) {
>>> - dev_err(&pdev->dev, "Failed to get sensor id\n");
>>> - ret = -ENODEV;
>>> - goto err_iomap;
>>> - }
>>> -
>>> data->regs = of_iomap(np, 0);
>>> if (!data->regs) {
>>> dev_err(&pdev->dev, "Failed to get memory region\n"); @@
>>> -223,19 +221,13 @@ static int qoriq_tmu_probe(struct platform_device
>>> *pdev)
>>> if (ret < 0)
>>> goto err_tmu;
>>>
>>> - data->tz = devm_thermal_zone_of_sensor_register(&pdev->dev,
>>> - data->sensor_id,
>>> - data, &tmu_tz_ops);
>>> - if (IS_ERR(data->tz)) {
>>> - ret = PTR_ERR(data->tz);
>>> - dev_err(&pdev->dev,
>>> - "Failed to register thermal zone device %d\n", ret);
>>> - goto err_tmu;
>>> + ret = qoriq_tmu_register_tmu_zone(pdev);
>>> + if (ret < 0) {
>>> + dev_err(&pdev->dev, "Failed to register sensors\n");
>>> + ret = -ENODEV;
>>> + goto err_iomap;
>>> }
>>>
>>> - /* Enable monitoring */
>>> - site = 0x1 << (15 - data->sensor_id);
>>> - tmu_write(data, site | TMR_ME | TMR_ALPF, &data->regs->tmr);
>>>
>>> return 0;
>>>
>>> --
>>> 1.7.1
>
--
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