Re: [PATCH 3/6] thermal: exynos: Provide initial setting for TMU's test MUX address at Exynos4412

amit daniel kachhap
2013-09-30T11:59:22Z

Hi,

On Tue, Sep 24, 2013 at 1:38 PM, Lukasz Majewski <l.majewski@samsung.com> wrote:
> The commit d0a0ce3e77c795258d47f9163e92d5031d0c5221 ("thermal: exynos: Add
> missing definations and code cleanup") has removed setting of test MUX address
> value at TMU configuration setting.
>
> This field is not present on Exynos4210 and Exynos5 SoCs. However on Exynos4412
> SoC it is required to set this field after reset because without it TMU shows
> maximal available temperature, which causes immediate platform shutdown.
Right In 5250 this field is not defined so didn't catch this. The
changes looks fine but I have a minor comment that if this field is
defined in 4412 in detail then you can add a field entry in
exynos_tmu_registers with proper name and populate this field. The
good thing is that in 5250 also this field is reserved and the default
value is 0x6 so same TMU_DATA can be used for 5250 and 4412. The main
idea of this suggestion is to reduce the soc checks in the driver.

Thanks,
Amit Daniel
>
> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Reviewed-by: Tomasz Figa <t.figa@samsung.com>
> ---
> drivers/thermal/samsung/exynos_tmu.c | 3 +++
> drivers/thermal/samsung/exynos_tmu_data.h | 4 ++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index a858cc4..21b89e4 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -317,6 +317,9 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
>
> con = readl(data->base + reg->tmu_ctrl);
>
> + if (pdata->type == SOC_ARCH_EXYNOS4412)
> + con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);
> +
> if (pdata->reference_voltage) {
> con &= ~(reg->buf_vref_sel_mask << reg->buf_vref_sel_shift);
> con |= pdata->reference_voltage << reg->buf_vref_sel_shift;
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
> index b130b1e..a1ea19d 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -95,6 +95,10 @@
>
> #define EXYNOS_MAX_TRIGGER_PER_REG 4
>
> +/* Exynos4412 specific */
> +#define EXYNOS4412_MUX_ADDR_VALUE 6
> +#define EXYNOS4412_MUX_ADDR_SHIFT 20
> +
> /*exynos5440 specific registers*/
> #define EXYNOS5440_TMU_S0_7_TRIM 0x000
> #define EXYNOS5440_TMU_S0_7_CTRL 0x020
> --
> 1.7.10.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html

On Tue, Sep 24, 2013 at 1:38 PM, Lukasz Majewski <l.majewski@samsung.com> wrote:
> The commit d0a0ce3e77c795258d47f9163e92d5031d0c5221 ("thermal: exynos: Add
> missing definations and code cleanup") has removed setting of test MUX address
> value at TMU configuration setting.
>
> This field is not present on Exynos4210 and Exynos5 SoCs. However on Exynos4412
> SoC it is required to set this field after reset because without it TMU shows
> maximal available temperature, which causes immediate platform shutdown.
>
> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Reviewed-by: Tomasz Figa <t.figa@samsung.com>
> ---
> drivers/thermal/samsung/exynos_tmu.c | 3 +++
> drivers/thermal/samsung/exynos_tmu_data.h | 4 ++++
> 2 files changed, 7 insertions(+)
>
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index a858cc4..21b89e4 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -317,6 +317,9 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
>
> con = readl(data->base + reg->tmu_ctrl);
>
> + if (pdata->type == SOC_ARCH_EXYNOS4412)
> + con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);
> +
> if (pdata->reference_voltage) {
> con &= ~(reg->buf_vref_sel_mask << reg->buf_vref_sel_shift);
> con |= pdata->reference_voltage << reg->buf_vref_sel_shift;
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
> index b130b1e..a1ea19d 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -95,6 +95,10 @@
>
> #define EXYNOS_MAX_TRIGGER_PER_REG 4
>
> +/* Exynos4412 specific */
> +#define EXYNOS4412_MUX_ADDR_VALUE 6
> +#define EXYNOS4412_MUX_ADDR_SHIFT 20
> +
> /*exynos5440 specific registers*/
> #define EXYNOS5440_TMU_S0_7_TRIM 0x000
> #define EXYNOS5440_TMU_S0_7_CTRL 0x020
> --
> 1.7.10.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html