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SubjectRE: [PATCH v3] thermal: qoriq: add multiple sensors support
Date
PING.

BR,
Andy

> -----Original Message-----
> From: andy.tang@nxp.com <andy.tang@nxp.com>
> Sent: 2018年10月30日 9:00
> To: rui.zhang@intel.com; daniel.lezcano@linaro.org
> Cc: edubezval@gmail.com; linux-pm@vger.kernel.org;
> linux-kernel@vger.kernel.org; Andy Tang <andy.tang@nxp.com>
> Subject: [PATCH v3] thermal: qoriq: add multiple sensors support
>
> From: Yuantian Tang <andy.tang@nxp.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@nxp.com>
> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.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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