Re: [PATCH 3/3] thermal: samsung: Add TMU support for Exynos5420 SoCs

From: Naveen Krishna Ch
Date: Wed Oct 09 2013 - 07:46:11 EST

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Hello Bartlomiej,

On 3 October 2013 18:12, Bartlomiej Zolnierkiewicz
<b.zolnierkie@xxxxxxxxxxx> wrote:
>
> Hi,
>
> I would like to see few minor cleanup changes, please see below:
Sure.
>
> On Thursday, October 03, 2013 05:31:42 PM Naveen Krishna Ch wrote:
>> On 4 September 2013 09:53, Naveen Krishna Chatradhi
>> <ch.naveen@xxxxxxxxxxx> wrote:
>> > This patch adds the neccessary register changes and arch information
>> > to support Exynos5420 SoCs
>> > Exynos5420 has 5 TMU channels one for each CPU 0, 1, 2 and 3 and GPU
>> >
>> > Also updated the Documentation at
>> > Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>> >
>> > Note: The platform data structure will be handled properly once the driver
>> > moves to complete device driver solution.
>> >
>> > Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>
>> > ---
>> > Changes since v1:
>> > 1. modified the platform data structure in order to pass SHARED flag
>> > for channels that need sharing of address space.
>> > 2. https://lkml.org/lkml/2013/8/1/38 is merged into this patch.
>> > As the changes are minimum and can be added here.
>> >
>> > .../devicetree/bindings/thermal/exynos-thermal.txt | 39 ++++++
>> > drivers/thermal/samsung/exynos_tmu.c | 14 ++-
>> > drivers/thermal/samsung/exynos_tmu.h | 1 +
>> > drivers/thermal/samsung/exynos_tmu_data.c | 130 ++++++++++++++++++++
>> > drivers/thermal/samsung/exynos_tmu_data.h | 7 ++
>> > 5 files changed, 189 insertions(+), 2 deletions(-)
>> >
>> > diff --git a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>> > index 116cca0..d70f2a4 100644
>> > --- a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>> > +++ b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>> > @@ -7,12 +7,23 @@
>> > "samsung,exynos4210-tmu"
>> > "samsung,exynos5250-tmu"
>> > "samsung,exynos5440-tmu"
>> > + "samsung,exynos5420-tmu"
>
> it should come before "samsung,exynos5440-tmu"
Done
>
>> > - interrupt-parent : The phandle for the interrupt controller
>> > - reg : Address range of the thermal registers. For soc's which has multiple
>> > instances of TMU and some registers are shared across all TMU's like
>> > interrupt related then 2 set of register has to supplied. First set
>> > belongs to each instance of TMU and second set belongs to second set
>> > of common TMU registers.
>> > + NOTE: On Exynos5420, the TRIMINFO register is misplaced for TMU
>> > + channels 2, 3 and 4
>> > +
>> > + TRIMINFO at 0x1006c000 contains data for TMU channel 3
>> > + TRIMINFO at 0x100a0000 contains data for TMU channel 4
>> > + TRIMINFO at 0x10068000 contains data for TMU channel 2
>> > +
>> > + The misplaced register address is passed through devicetree as the
>> > + second base
>> > +
>> > - interrupts : Should contain interrupt for thermal system
>> > - clocks : The main clock for TMU device
>> > - clock-names : Thermal system clock name
>> > @@ -43,6 +54,34 @@ Example 2):
>> > clock-names = "tmu_apbif";
>> > };
>> >
>> > +Example 3): (In case of Exynos5420)
>> > + /* tmu for CPU2 */
>> > + tmu@10068000 {
>> > + compatible = "samsung,exynos5420-tmu";
>> > + reg = <0x10068000 0x100>, <0x1006c000 0x4>;
>> > + interrupts = <0 184 0>;
>> > + clocks = <&clock 318>;
>> > + clock-names = "tmu_apbif";
>> > + };
>> > +
>> > + /* tmu for CPU3 */
>> > + tmu@1006c000 {
>> > + compatible = "samsung,exynos5420-tmu";
>> > + reg = <0x1006c000 0x100>, <0x100a0000 0x4>;
>> > + interrupts = <0 185 0>;
>> > + clocks = <&clock 318>;
>> > + clock-names = "tmu_apbif";
>> > + };
>> > +
>> > + /* tmu for GPU */
>> > + tmu@100a0000 {
>> > + compatible = "samsung,exynos5420-tmu";
>> > + reg = <0x100a0000 0x100>, <0x10068000 0x4>;
>> > + interrupts = <0 215 0>;
>> > + clocks = <&clock 318>;
>> > + clock-names = "tmu_apbif";
>> > + };
>> > +
>> > Note: For multi-instance tmu each instance should have an alias correctly
>> > numbered in "aliases" node.
>> >
>> > diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
>> > index 3a55caf..6d34652 100644
>> > --- a/drivers/thermal/samsung/exynos_tmu.c
>> > +++ b/drivers/thermal/samsung/exynos_tmu.c
>> > @@ -186,7 +186,12 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
>> > EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
>> > }
>> > } else {
>> > - trim_info = readl(data->base + reg->triminfo_data);
>> > + /* On exynos5420 the triminfo register is in the shared space */
>> > + if (data->base_second && (data->soc == SOC_ARCH_EXYNOS5420))
>> > + trim_info = readl(data->base_second +
>> > + reg->triminfo_data);
>> > + else
>> > + trim_info = readl(data->base + reg->triminfo_data);
>> > }
>> > data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
>> > data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
>> > @@ -499,6 +504,10 @@ static const struct of_device_id exynos_tmu_match[] = {
>> > .compatible = "samsung,exynos5440-tmu",
>> > .data = (void *)EXYNOS5440_TMU_DRV_DATA,
>> > },
>> > + {
>> > + .compatible = "samsung,exynos5420-tmu",
>> > + .data = (void *)EXYNOS5420_TMU_DRV_DATA,
>> > + },
>
> it should come before 5440 entry
Done
>
>> > {},
>> > };
>> > MODULE_DEVICE_TABLE(of, exynos_tmu_match);
>> > @@ -637,7 +646,8 @@ static int exynos_tmu_probe(struct platform_device *pdev)
>> >
>> > if (pdata->type == SOC_ARCH_EXYNOS ||
>> > pdata->type == SOC_ARCH_EXYNOS4210 ||
>> > - pdata->type == SOC_ARCH_EXYNOS5440)
>> > + pdata->type == SOC_ARCH_EXYNOS5440 ||
>> > + pdata->type == SOC_ARCH_EXYNOS5420)
>
> please check for 5420 before 5440
Done
>
>> > data->soc = pdata->type;
>> > else {
>> > ret = -EINVAL;
>> > diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
>> > index ebd2ec1..774ab03 100644
>> > --- a/drivers/thermal/samsung/exynos_tmu.h
>> > +++ b/drivers/thermal/samsung/exynos_tmu.h
>> > @@ -43,6 +43,7 @@ enum soc_type {
>> > SOC_ARCH_EXYNOS4210 = 1,
>> > SOC_ARCH_EXYNOS,
>> > SOC_ARCH_EXYNOS5440,
>> > + SOC_ARCH_EXYNOS5420,
>
> 5420 should come before 5440
Done
>
>> > };
>> >
>> > /**
>> > diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
>> > index 58570d0..a6d5cb5 100644
>> > --- a/drivers/thermal/samsung/exynos_tmu_data.c
>> > +++ b/drivers/thermal/samsung/exynos_tmu_data.c
>> > @@ -177,6 +177,136 @@ struct exynos_tmu_init_data const exynos5250_default_tmu_data = {
>> > };
>> > #endif
>> >
>> > +#if defined(CONFIG_SOC_EXYNOS5420)
>> > +static const struct exynos_tmu_registers exynos5420_tmu_registers = {
>> > + .triminfo_data = EXYNOS_TMU_REG_TRIMINFO,
>> > + .triminfo_25_shift = EXYNOS_TRIMINFO_25_SHIFT,
>> > + .triminfo_85_shift = EXYNOS_TRIMINFO_85_SHIFT,
>> > + .tmu_ctrl = EXYNOS_TMU_REG_CONTROL,
>> > + .buf_vref_sel_shift = EXYNOS_TMU_REF_VOLTAGE_SHIFT,
>> > + .buf_vref_sel_mask = EXYNOS_TMU_REF_VOLTAGE_MASK,
>> > + .therm_trip_mode_shift = EXYNOS_TMU_TRIP_MODE_SHIFT,
>> > + .therm_trip_mode_mask = EXYNOS_TMU_TRIP_MODE_MASK,
>> > + .therm_trip_en_shift = EXYNOS_TMU_THERM_TRIP_EN_SHIFT,
>> > + .buf_slope_sel_shift = EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT,
>> > + .buf_slope_sel_mask = EXYNOS_TMU_BUF_SLOPE_SEL_MASK,
>> > + .core_en_shift = EXYNOS_TMU_CORE_EN_SHIFT,
>> > + .tmu_status = EXYNOS_TMU_REG_STATUS,
>> > + .tmu_cur_temp = EXYNOS_TMU_REG_CURRENT_TEMP,
>> > + .threshold_th0 = EXYNOS_THD_TEMP_RISE,
>> > + .threshold_th1 = EXYNOS_THD_TEMP_FALL,
>> > + .tmu_inten = EXYNOS_TMU_REG_INTEN,
>> > + .inten_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
>> > + .inten_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
>> > + .inten_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
>> > + .inten_fall_shift = EXYNOS_TMU_FALL_INT_SHIFT,
>> > + .inten_rise0_shift = EXYNOS_TMU_INTEN_RISE0_SHIFT,
>> > + .inten_rise1_shift = EXYNOS_TMU_INTEN_RISE1_SHIFT,
>> > + .inten_rise2_shift = EXYNOS_TMU_INTEN_RISE2_SHIFT,
>> > + /* INTEN_RISE3 Not availble in exynos5420 */
>> > + .inten_rise3_shift = EXYNOS_TMU_INTEN_RISE3_SHIFT,
>> > + .inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
>> > + .tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
>> > + .tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
>> > + .intclr_fall_shift = EXYNOS_TMU_FALL_INT_SHIFT,
>> > + .emul_con = EXYNOS_EMUL_CON,
>> > + .emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
>> > + .emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
>> > + .emul_time_mask = EXYNOS_EMUL_TIME_MASK,
>> > +};
>> > +
>> > +#define EXYNOS5420_TMU_DATA \
>> > + .threshold_falling = 10, \
>> > + .trigger_levels[0] = 85, \
>> > + .trigger_levels[1] = 103, \
>> > + .trigger_levels[2] = 110, \
>> > + .trigger_levels[3] = 120, \
>> > + .trigger_enable[0] = true, \
>> > + .trigger_enable[1] = true, \
>> > + .trigger_enable[2] = true, \
>> > + .trigger_enable[3] = false, \
>> > + .trigger_type[0] = THROTTLE_ACTIVE, \
>> > + .trigger_type[1] = THROTTLE_ACTIVE, \
>> > + .trigger_type[2] = SW_TRIP, \
>> > + .trigger_type[3] = HW_TRIP, \
>> > + .max_trigger_level = 4, \
>> > + .gain = 8, \
>> > + .reference_voltage = 16, \
>> > + .noise_cancel_mode = 4, \
>> > + .cal_type = TYPE_ONE_POINT_TRIMMING, \
>> > + .efuse_value = 55, \
>> > + .min_efuse_value = 40, \
>> > + .max_efuse_value = 100, \
>> > + .first_point_trim = 25, \
>> > + .second_point_trim = 85, \
>> > + .default_temp_offset = 50, \
>> > + .freq_tab[0] = { \
>> > + .freq_clip_max = 800 * 1000, \
>> > + .temp_level = 85, \
>> > + }, \
>> > + .freq_tab[1] = { \
>> > + .freq_clip_max = 200 * 1000, \
>> > + .temp_level = 103, \
>> > + }, \
>> > + .freq_tab_count = 2, \
>> > + .type = SOC_ARCH_EXYNOS5420, \
>> > + .registers = &exynos5420_tmu_registers, \
>> > + .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
>> > + TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
>> > + TMU_SUPPORT_EMUL_TIME)
>> > +
>> > +#define EXYNOS5420_TMU_DATA_SHARED \
>> > + .threshold_falling = 10, \
>> > + .trigger_levels[0] = 85, \
>> > + .trigger_levels[1] = 103, \
>> > + .trigger_levels[2] = 110, \
>> > + .trigger_levels[3] = 120, \
>> > + .trigger_enable[0] = true, \
>> > + .trigger_enable[1] = true, \
>> > + .trigger_enable[2] = true, \
>> > + .trigger_enable[3] = false, \
>> > + .trigger_type[0] = THROTTLE_ACTIVE, \
>> > + .trigger_type[1] = THROTTLE_ACTIVE, \
>> > + .trigger_type[2] = SW_TRIP, \
>> > + .trigger_type[3] = HW_TRIP, \
>> > + .max_trigger_level = 4, \
>> > + .gain = 8, \
>> > + .reference_voltage = 16, \
>> > + .noise_cancel_mode = 4, \
>> > + .cal_type = TYPE_ONE_POINT_TRIMMING, \
>> > + .efuse_value = 55, \
>> > + .min_efuse_value = 40, \
>> > + .max_efuse_value = 100, \
>> > + .first_point_trim = 25, \
>> > + .second_point_trim = 85, \
>> > + .default_temp_offset = 50, \
>> > + .freq_tab[0] = { \
>> > + .freq_clip_max = 800 * 1000, \
>> > + .temp_level = 85, \
>> > + }, \
>> > + .freq_tab[1] = { \
>> > + .freq_clip_max = 200 * 1000, \
>> > + .temp_level = 103, \
>> > + }, \
>> > + .freq_tab_count = 2, \
>> > + .type = SOC_ARCH_EXYNOS5420, \
>> > + .registers = &exynos5420_tmu_registers, \
>> > + .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
>> > + TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
>> > + TMU_SUPPORT_EMUL_TIME | TMU_SUPPORT_ADDRESS_MULTIPLE)
>
> EXYNOS5420_TMU_DATA and EXYNOS5420_TMU_DATA_SHARED are identical
> besides .features content so to avoid code duplication please define
> __EXYNOS5420_TMU_DATA with all shared entries and just do:
>
> #define EXYNOS5420_TMU_DATA \
> __EXYNOS5420_TMU_DATA \
> .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> TMU_SUPPORT_EMUL_TIME)
>
> #define EXYNOS5420_TMU_DATA_SHARED \
> __EXYNOS5420_TMU_DATA \
> .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> TMU_SUPPORT_EMUL_TIME | TMU_SUPPORT_ADDRESS_MULTIPLE)
yeah, It saves.
>
>> > +struct exynos_tmu_init_data const exynos5420_default_tmu_data = {
>> > + .tmu_data = {
>> > + { EXYNOS5420_TMU_DATA },
>> > + { EXYNOS5420_TMU_DATA },
>> > + { EXYNOS5420_TMU_DATA_SHARED },
>> > + { EXYNOS5420_TMU_DATA_SHARED },
>> > + { EXYNOS5420_TMU_DATA_SHARED },
>> > + },
>> > + .tmu_count = 5,
>> > +};
>> > +#endif
>> > +
>> > #if defined(CONFIG_SOC_EXYNOS5440)
>> > static const struct exynos_tmu_registers exynos5440_tmu_registers = {
>> > .triminfo_data = EXYNOS5440_TMU_S0_7_TRIM,
>> > diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
>> > index 8788a87..3ce94cd 100644
>> > --- a/drivers/thermal/samsung/exynos_tmu_data.h
>> > +++ b/drivers/thermal/samsung/exynos_tmu_data.h
>> > @@ -153,4 +153,11 @@ extern struct exynos_tmu_init_data const exynos5440_default_tmu_data;
>> > #define EXYNOS5440_TMU_DRV_DATA (NULL)
>> > #endif
>> >
>> > +#if defined(CONFIG_SOC_EXYNOS5420)
>> > +extern struct exynos_tmu_init_data const exynos5420_default_tmu_data;
>> > +#define EXYNOS5420_TMU_DRV_DATA (&exynos5420_default_tmu_data)
>> > +#else
>> > +#define EXYNOS5420_TMU_DRV_DATA (NULL)
>> > +#endif
>
> this should come before 5440 entry
Done
>
>> > #endif /*_EXYNOS_TMU_DATA_H*/
>> > --
>> > 1.7.9.5
>> Hello All,
>>
>> Amit Daniel, has Acked these patches a while ago
>> Any other review comments or updates on this patch ??
>> >
>>
>>
>> Thanks & Regards,
>
> Best regards,
Thanks for review and the suggestions. will post v4 right away.
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>

--
Shine bright,
(: Nav :)
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