Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751263Ab3FYLrQ (ORCPT ); Tue, 25 Jun 2013 07:47:16 -0400 Received: from mail-pb0-f42.google.com ([209.85.160.42]:52626 "EHLO mail-pb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029Ab3FYLrO (ORCPT ); Tue, 25 Jun 2013 07:47:14 -0400 From: Amit Daniel Kachhap To: linux-pm@vger.kernel.org, Zhang Rui , Eduardo Valentin Cc: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, amit.kachhap@gmail.com, Kukjin Kim Subject: [PATCH RESEND V7 25/30] thermal: exynos: Add hardware mode thermal calibration support Date: Tue, 25 Jun 2013 17:16:58 +0530 Message-Id: <1372160818-14607-1-git-send-email-amit.daniel@samsung.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1372071051-3167-26-git-send-email-amit.daniel@samsung.com> References: <1372071051-3167-26-git-send-email-amit.daniel@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6110 Lines: 163 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 Acked-by: Kukjin Kim Signed-off-by: Amit Daniel Kachhap --- 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 -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/