Re: [PATCH RESEND V7 25/30] thermal: exynos: Add hardware mode thermal calibration support

[Eduardo Valentin <eduardo.valentin@ti.com>]

[-- Attachment #1: Type: text/plain, Size: 6528 bytes --]

On 25-06-2013 07:46, Amit Daniel Kachhap wrote:
> This patch adds support for h/w mode calibration in the TMU controller.
> Soc's like 5440 support this features. The h/w supports two point calibration
> and one point calibration at 85C and 25C.
> 
> Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
> Acked-by: Kukjin Kim <kgene.kim@samsung.com>
> Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>

Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>

> ---
> Changes in this patch fixes a setting up of wrong calibration mode by defining
> trim type for 25 and 85C. This will be only used in H/W based calibration.
> 
>  drivers/thermal/samsung/exynos_tmu.c      |   33 ++++++++++++++++++++++++++++-
>  drivers/thermal/samsung/exynos_tmu.h      |    8 +++++++
>  drivers/thermal/samsung/exynos_tmu_data.c |    2 +
>  drivers/thermal/samsung/exynos_tmu_data.h |    2 +
>  4 files changed, 44 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index 3fac0f9..a6fc379 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -73,6 +73,9 @@ 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) {
> @@ -107,6 +110,9 @@ 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) {
> @@ -155,6 +161,9 @@ 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) {
>  		/*
> @@ -190,6 +199,7 @@ 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");
>  		goto out;
> @@ -297,7 +307,7 @@ 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;
> +	unsigned int con, interrupt_en, cal_val;
>  
>  	mutex_lock(&data->lock);
>  	clk_enable(data->clk);
> @@ -320,6 +330,27 @@ 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 25c48d4..b364c9e 100644
> --- a/drivers/thermal/samsung/exynos_tmu.h
> +++ b/drivers/thermal/samsung/exynos_tmu.h
> @@ -28,6 +28,8 @@
>  
>  enum calibration_type {
>  	TYPE_ONE_POINT_TRIMMING,
> +	TYPE_ONE_POINT_TRIMMING_25,
> +	TYPE_ONE_POINT_TRIMMING_85,
>  	TYPE_TWO_POINT_TRIMMING,
>  	TYPE_NONE,
>  };
> @@ -90,6 +92,10 @@ 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.
>   * @therm_trip_tq_en_shift: shift bits of thermal trip enable by TQ pin in
>  	tmu_ctrl register.
>   * @core_en_shift: shift bits of TMU core enable bit in tmu_ctrl register.
> @@ -151,6 +157,8 @@ 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	therm_trip_tq_en_shift;
>  	u32	core_en_shift;
>  
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index 5952915..9002499 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -189,6 +189,8 @@ 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,
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.h b/drivers/thermal/samsung/exynos_tmu_data.h
> index 43ce5fb..dc7feb5 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.h
> +++ b/drivers/thermal/samsung/exynos_tmu_data.h
> @@ -75,6 +75,8 @@
>  #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
> 


-- 
You have got to be excited about what you are doing. (L. Lamport)

Eduardo Valentin


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 295 bytes --]