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authorAmit Daniel Kachhap <amit.daniel@samsung.com>2013-06-24 16:20:47 +0530
committerEduardo Valentin <eduardo.valentin@ti.com>2013-08-13 09:52:03 -0400
commit498d22f616f6880531b6d75630a9cc0ecd1f7865 (patch)
tree2ffd87f06d24719b179f530b5d9a1b8ab0928001 /drivers/thermal
parent1928457ea6337043a06ca2acd9b4d01e75810a3f (diff)
downloadlinux-498d22f616f6880531b6d75630a9cc0ecd1f7865.tar.bz2
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>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/samsung/exynos_tmu.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index a6fc3798a6c4..ec01dfe4bef3 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -29,6 +29,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
#include "exynos_thermal_common.h"
#include "exynos_tmu.h"
@@ -48,6 +49,7 @@
* @clk: pointer to the clock structure.
* @temp_error1: fused value of the first point trim.
* @temp_error2: fused value of the second point trim.
+ * @regulator: pointer to the TMU regulator structure.
* @reg_conf: pointer to structure to register with core thermal.
*/
struct exynos_tmu_data {
@@ -61,6 +63,7 @@ struct exynos_tmu_data {
struct mutex lock;
struct clk *clk;
u8 temp_error1, temp_error2;
+ struct regulator *regulator;
struct thermal_sensor_conf *reg_conf;
};
@@ -527,10 +530,27 @@ static int exynos_map_dt_data(struct platform_device *pdev)
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata;
struct resource res;
+ int ret;
if (!data)
return -ENODEV;
+ /*
+ * Try enabling the regulator if found
+ * TODO: Add regulator as an SOC feature, so that regulator enable
+ * is a compulsory call.
+ */
+ data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
+ if (!IS_ERR(data->regulator)) {
+ ret = regulator_enable(data->regulator);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to enable vtmu\n");
+ return ret;
+ }
+ } else {
+ dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
+ }
+
data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
if (data->id < 0)
data->id = 0;
@@ -698,6 +718,9 @@ static int exynos_tmu_remove(struct platform_device *pdev)
clk_unprepare(data->clk);
+ if (!IS_ERR(data->regulator))
+ regulator_disable(data->regulator);
+
return 0;
}