Hello All,
On 2 January 2014 11:37, Zhang Rui <rui.zhang@xxxxxxxxx> wrote:
> On Thu, 2013-11-07 at 18:12 +0530, Naveen Krishna Chatradhi wrote:
>> 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 <abrestic@xxxxxxxxxxxx>
>> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>
>
> Eduardo,
>
> what do you think of this patch?
>
> thanks,
> rui
>> ---
>> 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);
>
>
Ping.
--
Shine bright,
(: Nav :)
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