forked from Minki/linux
thermal: exynos: Support for TMU regulator defined at device tree
TMU probe function now checks for a device tree defined regulator. For compatibility reasons it is allowed to probe driver even without this regulator defined. Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Acked-by: Eduardo Valentin <eduardo.valentin@ti.com> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
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@ -29,6 +29,7 @@
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
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#include "exynos_thermal_common.h"
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#include "exynos_tmu.h"
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@ -48,6 +49,7 @@
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* @clk: pointer to the clock structure.
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* @temp_error1: fused value of the first point trim.
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* @temp_error2: fused value of the second point trim.
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* @regulator: pointer to the TMU regulator structure.
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* @reg_conf: pointer to structure to register with core thermal.
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*/
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struct exynos_tmu_data {
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@ -61,6 +63,7 @@ struct exynos_tmu_data {
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struct mutex lock;
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struct clk *clk;
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u8 temp_error1, temp_error2;
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struct regulator *regulator;
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struct thermal_sensor_conf *reg_conf;
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};
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@ -527,10 +530,27 @@ static int exynos_map_dt_data(struct platform_device *pdev)
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struct exynos_tmu_data *data = platform_get_drvdata(pdev);
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struct exynos_tmu_platform_data *pdata;
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struct resource res;
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int ret;
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if (!data)
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return -ENODEV;
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/*
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* Try enabling the regulator if found
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* TODO: Add regulator as an SOC feature, so that regulator enable
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* is a compulsory call.
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*/
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data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
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if (!IS_ERR(data->regulator)) {
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ret = regulator_enable(data->regulator);
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if (ret) {
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dev_err(&pdev->dev, "failed to enable vtmu\n");
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return ret;
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}
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} else {
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dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
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}
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data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
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if (data->id < 0)
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data->id = 0;
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@ -698,6 +718,9 @@ static int exynos_tmu_remove(struct platform_device *pdev)
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clk_unprepare(data->clk);
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if (!IS_ERR(data->regulator))
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regulator_disable(data->regulator);
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return 0;
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}
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