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Message-ID: <20140515141441.GB27339@developer>
Date: Thu, 15 May 2014 10:14:41 -0400
From: Eduardo Valentin <edubezval@...il.com>
To: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc: Eduardo Valentin <edubezval@...il.com>,
Zhang Rui <rui.zhang@...el.com>,
Amit Daniel Kachhap <amit.daniel@...sung.com>,
Tomasz Figa <t.figa@...sung.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Kyungmin Park <kyungmin.park@...sung.com>,
linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/10] thermal: exynos: remove dead code for HW_MODE
calibration
Hello Bartlomiej
On Mon, May 05, 2014 at 01:15:32PM +0200, Bartlomiej Zolnierkiewicz wrote:
> There should be no functional changes caused by this patch.
>
Please provide better explanation when removing features. For instance,
based on the comment of commit introducing it, HW_MODE is a feature of
5540 samsung's SoC. Question is why now it is being removed?
commit 1928457ea6337043a06ca2acd9b4d01e75810a3f
Author: Amit Daniel Kachhap <amit.daniel@...sung.com>
Date: Mon Jun 24 16:20:46 2013 +0530
thermal: exynos: Add hardware mode thermal calibration support
This patch adds support for h/w mode calibration in the TMU controller.
Soc's like 5440 support this features. The h/w bits needed for calibration
setting are same as that of enum calibration_type.
Cheers,
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> ---
> drivers/thermal/samsung/exynos_tmu.c | 33 +------------------------------
> drivers/thermal/samsung/exynos_tmu.h | 13 ------------
> drivers/thermal/samsung/exynos_tmu_data.c | 3 ---
> drivers/thermal/samsung/exynos_tmu_data.h | 2 --
> 4 files changed, 1 insertion(+), 50 deletions(-)
>
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index 0d96a51..9f2a5ee 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -76,9 +76,6 @@ static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
> struct exynos_tmu_platform_data *pdata = data->pdata;
> int temp_code;
>
> - if (pdata->cal_mode == HW_MODE)
> - return temp;
> -
> if (data->soc == SOC_ARCH_EXYNOS4210)
> /* temp should range between 25 and 125 */
> if (temp < 25 || temp > 125) {
> @@ -113,9 +110,6 @@ static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
> struct exynos_tmu_platform_data *pdata = data->pdata;
> int temp;
>
> - if (pdata->cal_mode == HW_MODE)
> - return temp_code;
> -
> if (data->soc == SOC_ARCH_EXYNOS4210)
> /* temp_code should range between 75 and 175 */
> if (temp_code < 75 || temp_code > 175) {
> @@ -164,9 +158,6 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
> if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
> __raw_writel(1, data->base + reg->triminfo_ctrl);
>
> - if (pdata->cal_mode == HW_MODE)
> - goto skip_calib_data;
> -
> /* Save trimming info in order to perform calibration */
> if (data->soc == SOC_ARCH_EXYNOS5440) {
> /*
> @@ -202,7 +193,6 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
> (pdata->efuse_value >> reg->triminfo_85_shift) &
> EXYNOS_TMU_TEMP_MASK;
>
> -skip_calib_data:
> if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) {
> dev_err(&pdev->dev, "Invalid max trigger level\n");
> ret = -EINVAL;
> @@ -311,7 +301,7 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
> struct exynos_tmu_data *data = platform_get_drvdata(pdev);
> struct exynos_tmu_platform_data *pdata = data->pdata;
> const struct exynos_tmu_registers *reg = pdata->registers;
> - unsigned int con, interrupt_en, cal_val;
> + unsigned int con, interrupt_en;
>
> mutex_lock(&data->lock);
> clk_enable(data->clk);
> @@ -337,27 +327,6 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
> con |= (pdata->noise_cancel_mode << reg->therm_trip_mode_shift);
> }
>
> - if (pdata->cal_mode == HW_MODE) {
> - con &= ~(reg->calib_mode_mask << reg->calib_mode_shift);
> - cal_val = 0;
> - switch (pdata->cal_type) {
> - case TYPE_TWO_POINT_TRIMMING:
> - cal_val = 3;
> - break;
> - case TYPE_ONE_POINT_TRIMMING_85:
> - cal_val = 2;
> - break;
> - case TYPE_ONE_POINT_TRIMMING_25:
> - cal_val = 1;
> - break;
> - case TYPE_NONE:
> - break;
> - default:
> - dev_err(&pdev->dev, "Invalid calibration type, using none\n");
> - }
> - con |= cal_val << reg->calib_mode_shift;
> - }
> -
> if (on) {
> con |= (1 << reg->core_en_shift);
> interrupt_en =
> diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
> index 80dc899..e417af8 100644
> --- a/drivers/thermal/samsung/exynos_tmu.h
> +++ b/drivers/thermal/samsung/exynos_tmu.h
> @@ -34,11 +34,6 @@ enum calibration_type {
> TYPE_NONE,
> };
>
> -enum calibration_mode {
> - SW_MODE,
> - HW_MODE,
> -};
> -
> enum soc_type {
> SOC_ARCH_EXYNOS4210 = 1,
> SOC_ARCH_EXYNOS4412,
> @@ -92,10 +87,6 @@ enum soc_type {
> * @buf_slope_sel_shift: shift bits of amplifier gain value in tmu_ctrl
> register.
> * @buf_slope_sel_mask: mask bits of amplifier gain value in tmu_ctrl register.
> - * @calib_mode_shift: shift bits of calibration mode value in tmu_ctrl
> - register.
> - * @calib_mode_mask: mask bits of calibration mode value in tmu_ctrl
> - register.
> * @core_en_shift: shift bits of TMU core enable bit in tmu_ctrl register.
> * @tmu_status: register drescribing the TMU status.
> * @tmu_cur_temp: register containing the current temperature of the TMU.
> @@ -139,8 +130,6 @@ struct exynos_tmu_registers {
> u32 therm_trip_en_shift;
> u32 buf_slope_sel_shift;
> u32 buf_slope_sel_mask;
> - u32 calib_mode_shift;
> - u32 calib_mode_mask;
> u32 core_en_shift;
>
> u32 tmu_status;
> @@ -222,7 +211,6 @@ struct exynos_tmu_registers {
> * @default_temp_offset: default temperature offset in case of no trimming
> * @test_mux; information if SoC supports test MUX
> * @cal_type: calibration type for temperature
> - * @cal_mode: calibration mode for temperature
> * @freq_clip_table: Table representing frequency reduction percentage.
> * @freq_tab_count: Count of the above table as frequency reduction may
> * applicable to only some of the trigger levels.
> @@ -253,7 +241,6 @@ struct exynos_tmu_platform_data {
> u8 test_mux;
>
> enum calibration_type cal_type;
> - enum calibration_mode cal_mode;
> enum soc_type type;
> struct freq_clip_table freq_tab[4];
> unsigned int freq_tab_count;
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index 36d64d6..4b992d9 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -205,8 +205,6 @@ static const struct exynos_tmu_registers exynos5440_tmu_registers = {
> .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,
> - .calib_mode_shift = EXYNOS_TMU_CALIB_MODE_SHIFT,
> - .calib_mode_mask = EXYNOS_TMU_CALIB_MODE_MASK,
> .core_en_shift = EXYNOS_TMU_CORE_EN_SHIFT,
> .tmu_status = EXYNOS5440_TMU_S0_7_STATUS,
> .tmu_cur_temp = EXYNOS5440_TMU_S0_7_TEMP,
> @@ -243,7 +241,6 @@ static const struct exynos_tmu_registers exynos5440_tmu_registers = {
> .reference_voltage = 16, \
> .noise_cancel_mode = 4, \
> .cal_type = TYPE_ONE_POINT_TRIMMING, \
> - .cal_mode = 0, \
> .efuse_value = 0x5b2d, \
> .min_efuse_value = 16, \
> .max_efuse_value = 76, \
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
> index d4eeddb..1fed00d 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -60,8 +60,6 @@
> #define EXYNOS_TMU_TRIP_MODE_SHIFT 13
> #define EXYNOS_TMU_TRIP_MODE_MASK 0x7
> #define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12
> -#define EXYNOS_TMU_CALIB_MODE_SHIFT 4
> -#define EXYNOS_TMU_CALIB_MODE_MASK 0x3
>
> #define EXYNOS_TMU_INTEN_RISE0_SHIFT 0
> #define EXYNOS_TMU_INTEN_RISE1_SHIFT 4
> --
> 1.8.2.3
>
> --
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