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Date: Mon, 18 Nov 2013 08:52:57 +0530
From: Naveen Krishna Ch <naveenkrishna.ch@...il.com>
To: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
Cc: linux-pm@...r.kernel.org, rui.zhang@...el.com,
eduardo.valentin@...com,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>, linux-kernel@...r.kernel.org,
amit.daniel@...sung.com, Kukjin Kim <kgene.kim@...sung.com>,
devicetree@...r.kernel.org, b.zolnierkie@...sung.com,
cpgs@...sung.com, t.figa@...sung.com
Subject: Re: [PATCH 3/4 v9] thermal: samsung: Add TMU support for Exynos5420 SoCs
Hello All,
On 12 November 2013 12:07, Naveen Krishna Chatradhi
<ch.naveen@...sung.com> wrote:
> Exynos5420 has 5 TMU channels, 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
>
> This patch
> 1 Adds the neccessary register changes and arch information
> to support Exynos5420 SoCs.
> 2. Handles the gate clock for misplaced TRIMINFO register
> 3. Updates the Documentation at
> Documentation/devicetree/bindings/thermal/exynos-thermal.txt
>
> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
> ---
> Changes since v8:
> 1. rewrote the Documentation for device tree bindings
> 2. Merged the https://lkml.org/lkml/2013/11/7/262 (as this is a fix)
> 3. introduces "samsung,exynos5420-tmu-triminfo" and
> "samsung,exynos5420-tmu-triminfo-clk" to handle the TMU channels on
> Exynos5420 more appropriately
>
> .../devicetree/bindings/thermal/exynos-thermal.txt | 45 +++++++++
> drivers/thermal/samsung/exynos_tmu.c | 58 ++++++++++-
> drivers/thermal/samsung/exynos_tmu.h | 2 +
> drivers/thermal/samsung/exynos_tmu_data.c | 106 ++++++++++++++++++++
> drivers/thermal/samsung/exynos_tmu_data.h | 8 ++
> 5 files changed, 215 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> index 116cca0..5055b31 100644
> --- a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> +++ b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
> @@ -6,6 +6,11 @@
> "samsung,exynos4412-tmu"
> "samsung,exynos4210-tmu"
> "samsung,exynos5250-tmu"
> + "samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420
> + "samsung,exynos5420-tmu-triminfo" for TMU channel 2 Exynos5420
> + (Must pass triminfo base)
> + "samsung,exynos5420-tmu-triminfo-clk" for TMU channel 3 and 4
> + Exynos5420 (Must pass triminfo base and triminfo clock)
> "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 +18,18 @@
> 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
> + Use "samsung,exynos5420-tmu-triminfo" in cases, there is a misplaced
> + register but no need of another clock to access that base.
> + Use "samsung,exynos5420-tmu-triminfo-clk" in cases where there is a misplaced
> + register and we need another clock to access that base.
> +
> + 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
> +
> - interrupts : Should contain interrupt for thermal system
> - clocks : The main clock for TMU device
> - clock-names : Thermal system clock name
> @@ -43,6 +60,34 @@ Example 2):
> clock-names = "tmu_apbif";
> };
>
> +Example 3): (In case of Exynos5420 "with misplaced TRIMINFO register")
> + /* tmu for CPU2 */
> + tmu@...68000 {
> + compatible = "samsung,exynos5420-tmu-triminfo";
> + reg = <0x10068000 0x100>, <0x1006c000 0x4>;
> + interrupts = <0 184 0>;
> + clocks = <&clock 318>;
> + clock-names = "tmu_apbif";
> + };
> +
> + /* tmu for CPU3 */
> + tmu@...6c000 {
> + compatible = "samsung,exynos5420-tmu-triminfo-clk";
> + reg = <0x1006c000 0x100>, <0x100a0000 0x4>;
> + interrupts = <0 185 0>;
> + clocks = <&clock 318>;
> + clock-names = "tmu_apbif", "tmu_triminfo_apbif";
> + };
> +
> + /* tmu for GPU */
> + tmu@...a0000 {
> + compatible = "samsung,exynos5420-tmu-triminfo-clk";
> + reg = <0x100a0000 0x100>, <0x10068000 0x4>;
> + interrupts = <0 215 0>;
> + clocks = <&clock 318>;
> + clock-names = "tmu_apbif", "tmu_triminfo_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 bbd0fc3..826647c 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);
> @@ -186,7 +189,13 @@ 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->soc == SOC_ARCH_EXYNOS5420_TRIMINFO ||
> + data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO_CLK)
> + 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) &
> @@ -301,6 +310,8 @@ 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;
> }
> @@ -452,12 +463,16 @@ 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);
> @@ -498,6 +513,18 @@ 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,exynos5420-tmu-triminfo",
> + .data = (void *)EXYNOS5420_TMU_DRV_DATA,
> + },
> + {
> + .compatible = "samsung,exynos5420-tmu-triminfo-clk",
> + .data = (void *)EXYNOS5420_TMU_DRV_DATA,
> + },
> + {
> .compatible = "samsung,exynos5440-tmu",
> .data = (void *)EXYNOS5440_TMU_DRV_DATA,
> },
> @@ -628,13 +655,31 @@ static int exynos_tmu_probe(struct platform_device *pdev)
> return PTR_ERR(data->clk);
> }
>
> + data->clk_sec = devm_clk_get(&pdev->dev, "tmu_apbif_triminfo");
> + if (IS_ERR(data->clk_sec)) {
> + if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO_CLK) {
> + dev_err(&pdev->dev, "Failed to get triminfo clock\n");
> + return PTR_ERR(data->clk_sec);
> + }
> + } else {
> + ret = clk_prepare(data->clk_sec);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to get clock\n");
> + return ret;
> + }
> + }
> +
> ret = clk_prepare(data->clk);
> - if (ret)
> - return ret;
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to get clock\n");
> + goto err_clk_sec;
> + }
>
> if (pdata->type == SOC_ARCH_EXYNOS4210 ||
> pdata->type == SOC_ARCH_EXYNOS4412 ||
> pdata->type == SOC_ARCH_EXYNOS5250 ||
> + pdata->type == SOC_ARCH_EXYNOS5420_TRIMINFO ||
> + pdata->type == SOC_ARCH_EXYNOS5420_TRIMINFO_CLK ||
> pdata->type == SOC_ARCH_EXYNOS5440)
> data->soc = pdata->type;
> else {
> @@ -703,6 +748,9 @@ static int exynos_tmu_probe(struct platform_device *pdev)
> return 0;
> err_clk:
> clk_unprepare(data->clk);
> +err_clk_sec:
> + if (!IS_ERR(data->clk_sec))
> + clk_unprepare(data->clk_sec);
> return ret;
> }
>
> @@ -715,6 +763,8 @@ 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);
> diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
> index 0d6b32f..f2eb3ac 100644
> --- a/drivers/thermal/samsung/exynos_tmu.h
> +++ b/drivers/thermal/samsung/exynos_tmu.h
> @@ -43,6 +43,8 @@ enum soc_type {
> SOC_ARCH_EXYNOS4210 = 1,
> SOC_ARCH_EXYNOS4412,
> SOC_ARCH_EXYNOS5250,
> + SOC_ARCH_EXYNOS5420_TRIMINFO,
> + SOC_ARCH_EXYNOS5420_TRIMINFO_CLK,
> SOC_ARCH_EXYNOS5440,
> };
>
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index 1d27069..ff79c9a 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -194,6 +194,112 @@ 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_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 = EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT,
> + .intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
> + .intclr_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
> + .intclr_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
> + .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, \
> + .registers = &exynos5420_tmu_registers, \
> +
> +#define EXYNOS5420_TMU_DATA \
> + __EXYNOS5420_TMU_DATA \
> + .type = SOC_ARCH_EXYNOS5250, \
> + .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 \
> + .type = SOC_ARCH_EXYNOS5420_TRIMINFO, \
> + .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> + TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> + TMU_SUPPORT_EMUL_TIME | TMU_SUPPORT_ADDRESS_MULTIPLE)
> +
> +#define EXYNOS5420_TMU_DATA_SHARED_CLK \
> + __EXYNOS5420_TMU_DATA \
> + .type = SOC_ARCH_EXYNOS5420_TRIMINFO_CLK, \
> + .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_CLK },
> + { EXYNOS5420_TMU_DATA_SHARED_CLK },
> + },
> + .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 d9495a4..41f06dc 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -72,6 +72,7 @@
> #define EXYNOS_TMU_CLEAR_RISE_INT 0x111
> #define EXYNOS_TMU_CLEAR_FALL_INT (0x111 << 12)
> #define EXYNOS_TMU_CLEAR_FALL_INT_SHIFT 12
> +#define EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT 16
> #define EXYNOS5440_TMU_CLEAR_FALL_INT_SHIFT 4
> #define EXYNOS_TMU_TRIP_MODE_SHIFT 13
> #define EXYNOS_TMU_TRIP_MODE_MASK 0x7
> @@ -156,6 +157,13 @@ 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)
> --
> 1.7.10.4
Any comments on this patch
>
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