Re: [PATCH 3/3 v7] thermal: samsung: Add TMU support for Exynos5420SoCs

From: Bartlomiej Zolnierkiewicz
Date: Wed Nov 06 2013 - 08:45:00 EST


On Wednesday, November 06, 2013 06:58:45 PM Naveen Krishna Chatradhi 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.
> Changes since v3:
> a. Rearraged the code alphabetically, make exynso5420 come before exynso5440
> b. Reduce code duplication in passing platform data by introducing a common macro
> Bartlomiej Zolnierkiewicz Thanks for review and suggestions
> Changes since v4:
> None
> Changes since v5:
> None
> Changes since v6:
> - removed the unsued field "inten_fall_shift"

I cannot find this change in the patch below, also
this should be done in patch #1/3 not in #3/3.

> - defined EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT instead of using EXYNOS_TMU_FALL_INT_SHIFT

The code below still uses EXYNOS_TMU_FALL_INT_SHIFT and
EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT is not defined anywhere.

Have you posted the right patches?

> .../devicetree/bindings/thermal/exynos-thermal.txt | 39 ++++++++
> drivers/thermal/samsung/exynos_tmu.c | 12 ++-
> drivers/thermal/samsung/exynos_tmu.h | 1 +
> drivers/thermal/samsung/exynos_tmu_data.c | 99 ++++++++++++++++++++
> drivers/thermal/samsung/exynos_tmu_data.h | 7 ++
> 5 files changed, 157 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> index 116cca0..c5f9a74 100644
> --- a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> +++ b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> @@ -6,6 +6,7 @@
> "samsung,exynos4412-tmu"
> "samsung,exynos4210-tmu"
> "samsung,exynos5250-tmu"
> + "samsung,exynos5420-tmu"
> "samsung,exynos5440-tmu"
> - interrupt-parent : The phandle for the interrupt controller
> - reg : Address range of the thermal registers. For soc's which has multiple
> @@ -13,6 +14,16 @@
> 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 ae80a87..b54825a 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) &
> @@ -498,6 +503,10 @@ static const struct of_device_id exynos_tmu_match[] = {
> .data = (void *)EXYNOS5250_TMU_DRV_DATA,
> },
> {
> + .compatible = "samsung,exynos5420-tmu",
> + .data = (void *)EXYNOS5420_TMU_DRV_DATA,
> + },
> + {
> .compatible = "samsung,exynos5440-tmu",
> .data = (void *)EXYNOS5440_TMU_DRV_DATA,
> },
> @@ -635,6 +644,7 @@ static int exynos_tmu_probe(struct platform_device *pdev)
> if (pdata->type == SOC_ARCH_EXYNOS4210 ||
> pdata->type == SOC_ARCH_EXYNOS4412 ||
> pdata->type == SOC_ARCH_EXYNOS5250 ||
> + pdata->type == SOC_ARCH_EXYNOS5420 ||
> pdata->type == SOC_ARCH_EXYNOS5440)
> data->soc = pdata->type;
> else {
> diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
> index d79264f..4b9be23 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_EXYNOS4412,
> SOC_ARCH_EXYNOS5250,
> + SOC_ARCH_EXYNOS5420,
> SOC_ARCH_EXYNOS5440,
> };
>
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index ad424ad..c876b1e 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -195,6 +195,105 @@ 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, \
> +
> +#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)
> +
> +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 bb412bb..eb2cb92 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -158,6 +158,13 @@ extern struct exynos_tmu_init_data const exynos5250_default_tmu_data;
> #define EXYNOS5250_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
> +
> #if defined(CONFIG_SOC_EXYNOS5440)
> extern struct exynos_tmu_init_data const exynos5440_default_tmu_data;
> #define EXYNOS5440_TMU_DRV_DATA (&exynos5440_default_tmu_data)

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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