forked from mirrors/linux
thermal: rcar_thermal: add r8a77995 support
Add support for R-Car D3 (r8a77995) thermal sensor. Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com> Tested-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Yoshihiro Kaneko
Eduardo Valentin
parent
31db453bd4
commit
1969d9dc20
1 changed files with 126 additions and 32 deletions
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@ -58,10 +58,47 @@ struct rcar_thermal_common {
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spinlock_t lock;
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};
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struct rcar_thermal_chip {
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unsigned int use_of_thermal : 1;
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unsigned int has_filonoff : 1;
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unsigned int irq_per_ch : 1;
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unsigned int needs_suspend_resume : 1;
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unsigned int nirqs;
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};
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static const struct rcar_thermal_chip rcar_thermal = {
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.use_of_thermal = 0,
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.has_filonoff = 1,
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.irq_per_ch = 0,
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.needs_suspend_resume = 0,
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.nirqs = 1,
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};
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static const struct rcar_thermal_chip rcar_gen2_thermal = {
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.use_of_thermal = 1,
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.has_filonoff = 1,
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.irq_per_ch = 0,
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.needs_suspend_resume = 0,
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.nirqs = 1,
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};
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static const struct rcar_thermal_chip rcar_gen3_thermal = {
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.use_of_thermal = 1,
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.has_filonoff = 0,
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.irq_per_ch = 1,
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.needs_suspend_resume = 1,
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/*
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* The Gen3 chip has 3 interrupts, but this driver uses only 2
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* interrupts to detect a temperature change, rise or fall.
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*/
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.nirqs = 2,
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};
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struct rcar_thermal_priv {
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void __iomem *base;
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struct rcar_thermal_common *common;
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struct thermal_zone_device *zone;
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const struct rcar_thermal_chip *chip;
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struct delayed_work work;
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struct mutex lock;
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struct list_head list;
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@ -77,13 +114,20 @@ struct rcar_thermal_priv {
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#define rcar_priv_to_dev(priv) ((priv)->common->dev)
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#define rcar_has_irq_support(priv) ((priv)->common->base)
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#define rcar_id_to_shift(priv) ((priv)->id * 8)
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#define rcar_of_data(dev) ((unsigned long)of_device_get_match_data(dev))
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#define rcar_use_of_thermal(dev) (rcar_of_data(dev) == USE_OF_THERMAL)
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#define USE_OF_THERMAL 1
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static const struct of_device_id rcar_thermal_dt_ids[] = {
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{ .compatible = "renesas,rcar-thermal", },
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{ .compatible = "renesas,rcar-gen2-thermal", .data = (void *)USE_OF_THERMAL },
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{
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.compatible = "renesas,rcar-thermal",
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.data = &rcar_thermal,
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},
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{
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.compatible = "renesas,rcar-gen2-thermal",
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.data = &rcar_gen2_thermal,
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},
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{
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.compatible = "renesas,thermal-r8a77995",
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.data = &rcar_gen3_thermal,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);
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@ -190,6 +234,7 @@ static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv)
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* enable IRQ
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*/
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if (rcar_has_irq_support(priv)) {
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if (priv->chip->has_filonoff)
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rcar_thermal_write(priv, FILONOFF, 0);
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/* enable Rising/Falling edge interrupt */
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@ -420,7 +465,7 @@ static int rcar_thermal_remove(struct platform_device *pdev)
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rcar_thermal_for_each_priv(priv, common) {
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rcar_thermal_irq_disable(priv);
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if (rcar_use_of_thermal(dev))
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if (priv->chip->use_of_thermal)
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thermal_remove_hwmon_sysfs(priv->zone);
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else
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thermal_zone_device_unregister(priv->zone);
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@ -438,6 +483,7 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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struct rcar_thermal_priv *priv;
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struct device *dev = &pdev->dev;
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struct resource *res, *irq;
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const struct rcar_thermal_chip *chip = of_device_get_match_data(dev);
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int mres = 0;
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int i;
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int ret = -ENODEV;
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@ -457,14 +503,18 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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for (i = 0; i < chip->nirqs; i++) {
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irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (irq) {
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if (!irq)
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continue;
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if (!common->base) {
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/*
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* platform has IRQ support.
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* Then, driver uses common registers
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* rcar_has_irq_support() will be enabled
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*/
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res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
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res = platform_get_resource(pdev, IORESOURCE_MEM,
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mres++);
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common->base = devm_ioremap_resource(dev, res);
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if (IS_ERR(common->base))
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return PTR_ERR(common->base);
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@ -472,6 +522,18 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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idle = 0; /* polling delay is not needed */
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}
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ret = devm_request_irq(dev, irq->start, rcar_thermal_irq,
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IRQF_SHARED, dev_name(dev), common);
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if (ret) {
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dev_err(dev, "irq request failed\n ");
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goto error_unregister;
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}
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/* update ENR bits */
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if (chip->irq_per_ch)
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enr_bits |= 1 << i;
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}
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for (i = 0;; i++) {
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res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
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if (!res)
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@ -491,6 +553,7 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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priv->common = common;
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priv->id = i;
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priv->chip = chip;
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mutex_init(&priv->lock);
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INIT_LIST_HEAD(&priv->list);
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INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
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@ -498,7 +561,7 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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if (ret < 0)
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goto error_unregister;
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if (rcar_use_of_thermal(dev))
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if (chip->use_of_thermal)
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priv->zone = devm_thermal_zone_of_sensor_register(
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dev, i, priv,
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&rcar_thermal_zone_of_ops);
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@ -515,7 +578,7 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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goto error_unregister;
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}
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if (rcar_use_of_thermal(dev)) {
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if (chip->use_of_thermal) {
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/*
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* thermal_zone doesn't enable hwmon as default,
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* but, enable it here to keep compatible
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@ -531,20 +594,12 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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list_move_tail(&priv->list, &common->head);
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/* update ENR bits */
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if (!chip->irq_per_ch)
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enr_bits |= 3 << (i * 8);
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}
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/* enable temperature comparation */
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if (irq) {
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ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 0,
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dev_name(dev), common);
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if (ret) {
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dev_err(dev, "irq request failed\n ");
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goto error_unregister;
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}
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if (enr_bits)
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rcar_thermal_common_write(common, ENR, enr_bits);
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}
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dev_info(dev, "%d sensor probed\n", i);
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@ -556,9 +611,48 @@ static int rcar_thermal_probe(struct platform_device *pdev)
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return ret;
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}
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#ifdef CONFIG_PM_SLEEP
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static int rcar_thermal_suspend(struct device *dev)
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{
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struct rcar_thermal_common *common = dev_get_drvdata(dev);
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struct rcar_thermal_priv *priv = list_first_entry(&common->head,
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typeof(*priv), list);
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if (priv->chip->needs_suspend_resume) {
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rcar_thermal_common_write(common, ENR, 0);
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rcar_thermal_irq_disable(priv);
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rcar_thermal_bset(priv, THSCR, CPCTL, 0);
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}
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return 0;
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}
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static int rcar_thermal_resume(struct device *dev)
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{
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struct rcar_thermal_common *common = dev_get_drvdata(dev);
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struct rcar_thermal_priv *priv = list_first_entry(&common->head,
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typeof(*priv), list);
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int ret;
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if (priv->chip->needs_suspend_resume) {
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ret = rcar_thermal_update_temp(priv);
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if (ret < 0)
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return ret;
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rcar_thermal_irq_enable(priv);
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rcar_thermal_common_write(common, ENR, 0x03);
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}
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(rcar_thermal_pm_ops, rcar_thermal_suspend,
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rcar_thermal_resume);
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static struct platform_driver rcar_thermal_driver = {
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.driver = {
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.name = "rcar_thermal",
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.pm = &rcar_thermal_pm_ops,
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.of_match_table = rcar_thermal_dt_ids,
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},
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.probe = rcar_thermal_probe,
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