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Date: Thu, 11 Oct 2018 10:56:54 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Andy Tang <andy.tang@....com>,
"rui.zhang@...el.com" <rui.zhang@...el.com>
Cc: "edubezval@...il.com" <edubezval@...il.com>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal: qoriq: add multiple sensors support
On 11/10/2018 10:07, Andy Tang wrote:
> Hi Rui,
>
> Appreciate if you can give it a review.
Thanks for the heads up. I'll take care of that.
-- Daniel
>> -----Original Message-----
>> From: andy.tang@....com <andy.tang@....com>
>> Sent: 2018年9月27日 10:42
>> To: rui.zhang@...el.com
>> Cc: edubezval@...il.com; daniel.lezcano@...aro.org;
>> linux-pm@...r.kernel.org; linux-kernel@...r.kernel.org; Andy Tang
>> <andy.tang@....com>
>> Subject: [PATCH] thermal: qoriq: add multiple sensors support
>>
>> From: Yuantian Tang <andy.tang@....com>
>>
>> There is only one sensor supported in current driver.
>> Multiple sensors are existing on Layscape socs. To support them, covert
>> this driver to support multiple sensors.
>>
>> Signed-off-by: Tang Yuantian <andy.tang@....com>
>> ---
>> drivers/thermal/qoriq_thermal.c | 117
>> +++++++++++++++++++++++----------------
>> 1 files changed, 70 insertions(+), 47 deletions(-)
>>
>> diff --git a/drivers/thermal/qoriq_thermal.c
>> b/drivers/thermal/qoriq_thermal.c index c866cc1..7c1e88a 100644
>> --- a/drivers/thermal/qoriq_thermal.c
>> +++ b/drivers/thermal/qoriq_thermal.c
>> @@ -69,14 +69,21 @@ 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) @@ -97,48 +104,83 @@ 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 qoriq_tmu_data *qdata = platform_get_drvdata(pdev);
>> struct of_phandle_args sensor_specs;
>> struct device_node *np, *sensor_np;
>> + int ret, id, sites = 0;
>>
>> np = of_find_node_by_name(NULL, "thermal-zones");
>> if (!np)
>> return -ENODEV;
>>
>> - 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) {
>> + for_each_available_child_of_node(np, sensor_np) {
>> + 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;
>> + }
>> +
>> + 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;
>> + }
>> +
>> of_node_put(np);
>> of_node_put(sensor_np);
>> - return ret;
>> - }
>>
>> - 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;
>> + if (id > SITES_MAX)
>> + return -EINVAL;
>> +
>> + qdata->sensor[id] = devm_kzalloc(&pdev->dev,
>> + sizeof(struct qoriq_sensor), GFP_KERNEL);
>> + if (!qdata->sensor[id])
>> + return -ENOMEM;
>> +
>> + qdata->sensor[id]->id = id;
>> + qdata->sensor[id]->qdata = qdata;
>> +
>> + 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)) {
>> + ret = PTR_ERR(qdata->sensor[id]->tzd);
>> + dev_err(&pdev->dev,
>> + "Failed to register thermal zone device.\n");
>> + return -ENODEV;
>> + }
>> +
>> + sites |= 0x1 << (15 - id);
>> }
>>
>> - of_node_put(np);
>> - of_node_put(sensor_np);
>> + /* 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) @@
>> -188,16 +230,11 @@ 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 = 0;
>>
>> if (!np) {
>> dev_err(&pdev->dev, "Device OF-Node is NULL"); @@ -213,13
>> +250,6 @@ 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"); @@
>> -233,18 +263,13 @@ static int qoriq_tmu_probe(struct platform_device
>> *pdev)
>> if (ret < 0)
>> goto err_tmu;
>>
>> - data->tz = 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;
>>
>> @@ -261,8 +286,6 @@ static int qoriq_tmu_remove(struct
>> platform_device *pdev) {
>> struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
>>
>> - thermal_zone_of_sensor_unregister(&pdev->dev, data->tz);
>> -
>> /* Disable monitoring */
>> tmu_write(data, TMR_DISABLE, &data->regs->tmr);
>>
>> --
>> 1.7.1
>
--
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