On Exynos5420 the TMU(4) for GPU has a seperate clock enable bit from
the other TMU channels(0 ~ 3). Hence, accessing TRIMINFO for base_second
should be acompanied by enabling the respective clock.
This patch which allow for a "clk_sec" clock to be specified in the
device-tree which will be ungated when accessing the TRIMINFO register.
Signed-off-by: Andrew Bresticker <abres...@chromium.org>
Signed-off-by: Naveen Krishna Chatradhi <ch.nav...@samsung.com>
---
drivers/thermal/samsung/exynos_tmu.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/samsung/exynos_tmu.c
b/drivers/thermal/samsung/exynos_tmu.c
index b54825a..33edd1a 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -47,6 +47,7 @@
* @irq_work: pointer to the irq work structure.
* @lock: lock to implement synchronization.
* @clk: pointer to the clock structure.
+ * @clk_sec: pointer to the clock structure for accessing the base_second.
* @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.
@@ -61,7 +62,7 @@ struct exynos_tmu_data {
enum soc_type soc;
struct work_struct irq_work;
struct mutex lock;
- struct clk *clk;
+ struct clk *clk, *clk_sec;
u8 temp_error1, temp_error2;
struct regulator *regulator;
struct thermal_sensor_conf *reg_conf;
@@ -152,6 +153,8 @@ static int exynos_tmu_initialize(struct platform_device
*pdev)
mutex_lock(&data->lock);
clk_enable(data->clk);
+ if (!IS_ERR(data->clk_sec))
+ clk_enable(data->clk_sec);
if (TMU_SUPPORTS(pdata, READY_STATUS)) {
status = readb(data->base + reg->tmu_status);
@@ -306,6 +309,8 @@ skip_calib_data:
out:
clk_disable(data->clk);
mutex_unlock(&data->lock);
+ if (!IS_ERR(data->clk_sec))
+ clk_disable(data->clk_sec);
return ret;
}
@@ -457,12 +462,16 @@ static void exynos_tmu_work(struct work_struct *work)
const struct exynos_tmu_registers *reg = pdata->registers;
unsigned int val_irq, val_type;
+ if (!IS_ERR(data->clk_sec))
+ clk_enable(data->clk_sec);
/* Find which sensor generated this interrupt */
if (reg->tmu_irqstatus) {
val_type = readl(data->base_second + reg->tmu_irqstatus);
if (!((val_type >> data->id) & 0x1))
goto out;
}
+ if (!IS_ERR(data->clk_sec))
+ clk_disable(data->clk_sec);
exynos_report_trigger(data->reg_conf);
mutex_lock(&data->lock);
@@ -641,6 +650,15 @@ static int exynos_tmu_probe(struct platform_device *pdev)
if (ret)
return ret;
+ data->clk_sec = devm_clk_get(&pdev->dev, "tmu_apbif_sec");
+ if (!IS_ERR(data->clk_sec)) {
+ ret = clk_prepare(data->clk_sec);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to get clock\n");
+ return PTR_ERR(data->clk_sec);
+ }
+ }
+
if (pdata->type == SOC_ARCH_EXYNOS4210 ||
pdata->type == SOC_ARCH_EXYNOS4412 ||
pdata->type == SOC_ARCH_EXYNOS5250 ||
@@ -713,6 +731,8 @@ static int exynos_tmu_probe(struct platform_device *pdev)
return 0;
err_clk:
clk_unprepare(data->clk);
+ if (!IS_ERR(data->clk_sec))
+ clk_unprepare(data->clk_sec);
return ret;
}
@@ -725,6 +745,8 @@ static int exynos_tmu_remove(struct platform_device *pdev)
exynos_unregister_thermal(data->reg_conf);
clk_unprepare(data->clk);
+ if (!IS_ERR(data->clk_sec))
+ clk_unprepare(data->clk_sec);
if (!IS_ERR(data->regulator))
regulator_disable(data->regulator);
--
1.7.10.4
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