From patchwork Tue Dec 3 05:23:26 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Kucheria X-Patchwork-Id: 11270537 X-Patchwork-Delegate: eduardo.valentin@ti.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C1E5F139A for ; Tue, 3 Dec 2019 05:23:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D7BC207DD for ; Tue, 3 Dec 2019 05:23:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="uZAxKqWE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727165AbfLCFX5 (ORCPT ); Tue, 3 Dec 2019 00:23:57 -0500 Received: from mail-pf1-f194.google.com ([209.85.210.194]:40106 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727059AbfLCFX4 (ORCPT ); Tue, 3 Dec 2019 00:23:56 -0500 Received: by mail-pf1-f194.google.com with SMTP id q8so1241163pfh.7 for ; Mon, 02 Dec 2019 21:23:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=8w3O8kJK6JTKWYTOLIspbo7nR07jsNBKlB261OZVEtM=; b=uZAxKqWEcy29faTTXe2jVdbbU5Ut17g1yPUntWjg2iFjIVevIyE6fSSrrXuZV/cOwm jjDR0dZf3ysYheXyeY0qdEmfCFZLjxqIMz5IarYDA2syYb91NKkiwKU9Rtptg3SduyBB cJ8CavFk9djEqXOQRDMJDEZFxxpKea51/to8/5gijI/xgHx0PGLlYT+1knMm/7ccRht8 lDHhUfp11oPrbPrySmHowxnNhsg2BUAjqbbJ0zOgkxM+qsx8bI8n0nhPW8cT/wtHY9Bq pl7em8fHh+moux7E+yKj9OPBTps7StVesl98lVlv02KTDEPMcoQ6nX787o2QpaPit2Re GSqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=8w3O8kJK6JTKWYTOLIspbo7nR07jsNBKlB261OZVEtM=; b=S0Q/l+0Z3NW7U1CpPBCUvZWjTbiMgTjXuH6nPLWUbYuqt6wmps7nKJp4mU0C1u9iBT tv3FNsqMyfdTvvof/4d5csFzVhHdP4uZuFPRNATv4lqB3XUTi7dTXhOQNu9G9XWtvMnw elaWEsXX++ktxshMhjdmno2flCkA/cnqBJ/gHaiFt4FbXDK7RjmRRaxQtWvCq/FhczGu 3xdQHSwqgWGKDsXJslvIKxIsQyEGYkrxhPPwGvGdRM2Mr5S5ixlzDBNGVD3FAGPS401h TsPEKTtELiEmxvb3LxUAS1Lz+v6hLnDPCPty+2F9mZuqg8VEQW+Hj9VV9qfBJqIc/0CT PIhw== X-Gm-Message-State: APjAAAUoUQam9pzVJYZDhah3xyDUoA3/CpksmEz8XRB2bRPwJ6p5fqqb +T++85cZZK6kVS04vpswS0UN8g== X-Google-Smtp-Source: APXvYqyEzUgxiA1qaPTGx9QEj9sSNAyiQt7FLWNyshKWzynEKcLEukf71AzN8u3Jp8GG5zVeooI4Nw== X-Received: by 2002:a65:66da:: with SMTP id c26mr3470228pgw.354.1575350635780; Mon, 02 Dec 2019 21:23:55 -0800 (PST) Received: from localhost ([14.96.109.134]) by smtp.gmail.com with ESMTPSA id l2sm1112425pjf.4.2019.12.02.21.23.54 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 02 Dec 2019 21:23:55 -0800 (PST) From: Amit Kucheria To: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, bjorn.andersson@linaro.org, swboyd@chromium.org, sivaa@codeaurora.org, Andy Gross Cc: Daniel Lezcano , Amit Kucheria , linux-pm@vger.kernel.org Subject: [PATCH v2 5/9] drivers: thermal: tsens: Add critical interrupt support Date: Tue, 3 Dec 2019 10:53:26 +0530 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org TSENS IP v2.x adds critical threshold interrupt support for each sensor in addition to the upper/lower threshold interrupt. Add support in the driver. Signed-off-by: Amit Kucheria --- drivers/thermal/qcom/tsens-common.c | 126 ++++++++++++++++++++++++++-- drivers/thermal/qcom/tsens-v2.c | 8 +- drivers/thermal/qcom/tsens.c | 26 +++++- drivers/thermal/qcom/tsens.h | 72 ++++++++++++++++ 4 files changed, 221 insertions(+), 11 deletions(-) diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c index e84e94a6f1a73..4cf550766cf66 100644 --- a/drivers/thermal/qcom/tsens-common.c +++ b/drivers/thermal/qcom/tsens-common.c @@ -23,6 +23,10 @@ * @low_thresh: lower threshold temperature value * @low_irq_mask: mask register for lower threshold irqs * @low_irq_clear: clear register for lower threshold irqs + * @crit_viol: critical threshold violated + * @crit_thresh: critical threshold temperature value + * @crit_irq_mask: mask register for critical threshold irqs + * @crit_irq_clear: clear register for critical threshold irqs * * Structure containing data about temperature threshold settings and * irq status if they were violated. @@ -36,6 +40,10 @@ struct tsens_irq_data { int low_thresh; u32 low_irq_mask; u32 low_irq_clear; + u32 crit_viol; + u32 crit_thresh; + u32 crit_irq_mask; + u32 crit_irq_clear; }; char *qfprom_read(struct device *dev, const char *cname) @@ -189,6 +197,9 @@ static void tsens_set_interrupt_v1(struct tsens_priv *priv, u32 hw_id, case LOWER: index = LOW_INT_CLEAR_0 + hw_id; break; + case CRITICAL: + /* No critical interrupts before v2 */ + break; } regmap_field_write(priv->rf[index], enable ? 0 : 1); } @@ -214,6 +225,10 @@ static void tsens_set_interrupt_v2(struct tsens_priv *priv, u32 hw_id, index_mask = LOW_INT_MASK_0 + hw_id; index_clear = LOW_INT_CLEAR_0 + hw_id; break; + case CRITICAL: + index_mask = CRIT_INT_MASK_0 + hw_id; + index_clear = CRIT_INT_CLEAR_0 + hw_id; + break; } if (enable) { @@ -268,7 +283,14 @@ static int tsens_threshold_violated(struct tsens_priv *priv, u32 hw_id, ret = regmap_field_read(priv->rf[LOWER_STATUS_0 + hw_id], &d->low_viol); if (ret) return ret; - if (d->up_viol || d->low_viol) + + if (priv->feat->crit_int) { + ret = regmap_field_read(priv->rf[CRITICAL_STATUS_0 + hw_id], &d->crit_viol); + if (ret) + return ret; + } + + if (d->up_viol || d->low_viol || d->crit_viol) return 1; return 0; @@ -292,22 +314,36 @@ static int tsens_read_irq_state(struct tsens_priv *priv, u32 hw_id, ret = regmap_field_read(priv->rf[LOW_INT_MASK_0 + hw_id], &d->low_irq_mask); if (ret) return ret; + ret = regmap_field_read(priv->rf[CRIT_INT_CLEAR_0 + hw_id], &d->crit_irq_clear); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[CRIT_INT_MASK_0 + hw_id], &d->crit_irq_mask); + if (ret) + return ret; + + d->crit_thresh = tsens_hw_to_mC(s, CRIT_THRESH_0 + hw_id); } else { /* No mask register on older TSENS */ d->up_irq_mask = 0; d->low_irq_mask = 0; + d->crit_irq_clear = 0; + d->crit_irq_mask = 0; + d->crit_thresh = 0; } d->up_thresh = tsens_hw_to_mC(s, UP_THRESH_0 + hw_id); d->low_thresh = tsens_hw_to_mC(s, LOW_THRESH_0 + hw_id); - dev_dbg(priv->dev, "[%u] %s%s: status(%u|%u) | clr(%u|%u) | mask(%u|%u)\n", - hw_id, __func__, (d->up_viol || d->low_viol) ? "(V)" : "", - d->low_viol, d->up_viol, d->low_irq_clear, d->up_irq_clear, - d->low_irq_mask, d->up_irq_mask); - dev_dbg(priv->dev, "[%u] %s%s: thresh: (%d:%d)\n", hw_id, __func__, - (d->up_viol || d->low_viol) ? "(violation)" : "", - d->low_thresh, d->up_thresh); + dev_dbg(priv->dev, "[%u] %s%s: status(%u|%u|%u) |" + " clr(%u|%u|%u) | mask(%u|%u|%u)\n", + hw_id, __func__, + (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", + d->low_viol, d->up_viol, d->crit_viol, + d->low_irq_clear, d->up_irq_clear, d->crit_irq_clear, + d->low_irq_mask, d->up_irq_mask, d->crit_irq_mask); + dev_dbg(priv->dev, "[%u] %s%s: thresh: (%d:%d:%d)\n", hw_id, __func__, + (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", + d->low_thresh, d->up_thresh, d->crit_thresh); return 0; } @@ -321,6 +357,64 @@ static inline u32 masked_irq(u32 hw_id, u32 mask, enum tsens_ver ver) return 0; } +/** + * tsens_critical_irq_thread - Threaded interrupt handler for critical interrupts + * @irq: irq number + * @data: tsens controller private data + * + * Check all sensors to find ones that violated their critical threshold limits. + * Clear and then re-enable the interrupt. + * + * The level-triggered interrupt might deassert if the temperature returned to + * within the threshold limits by the time the handler got scheduled. We + * consider the irq to have been handled in that case. + * + * Return: IRQ_HANDLED + */ +irqreturn_t tsens_critical_irq_thread(int irq, void *data) +{ + struct tsens_priv *priv = data; + struct tsens_irq_data d; + unsigned long flags; + int temp, ret, i; + + for (i = 0; i < priv->num_sensors; i++) { + const struct tsens_sensor *s = &priv->sensor[i]; + u32 hw_id = s->hw_id; + + if (IS_ERR(s->tzd)) + continue; + if (!tsens_threshold_violated(priv, hw_id, &d)) + continue; + ret = get_temp_tsens_valid(s, &temp); + if (ret) { + dev_err(priv->dev, "[%u] %s: error reading sensor\n", hw_id, __func__); + continue; + } + + spin_lock_irqsave(&priv->ul_lock, flags); + + tsens_read_irq_state(priv, hw_id, s, &d); + + if (d.crit_viol && + !masked_irq(hw_id, d.crit_irq_mask, tsens_version(priv))) { + tsens_set_interrupt(priv, hw_id, CRITICAL, false); + if (d.crit_thresh > temp) { + dev_dbg(priv->dev, "[%u] %s: re-arm upper\n", + hw_id, __func__); + } else { + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", + hw_id, __func__, temp); + } + tsens_set_interrupt(priv, hw_id, CRITICAL, true); + } + + spin_unlock_irqrestore(&priv->crit_lock, flags); + } + + return IRQ_HANDLED; +} + /** * tsens_irq_thread - Threaded interrupt handler for uplow interrupts * @irq: irq number @@ -683,6 +777,22 @@ int __init init_common(struct tsens_priv *priv) } } + if (priv->feat->crit_int) { + /* This loop might need changes if enum regfield_ids is reordered */ + for (j = CRITICAL_STATUS_0; j <= CRIT_THRESH_15; j += 16) { + for (i = 0; i < priv->feat->max_sensors; i++) { + int idx = j + i; + + priv->rf[idx] = devm_regmap_field_alloc(dev, priv->tm_map, + priv->fields[idx]); + if (IS_ERR(priv->rf[idx])) { + ret = PTR_ERR(priv->rf[idx]); + goto err_put_device; + } + } + } + } + spin_lock_init(&priv->ul_lock); tsens_enable_irq(priv); tsens_debug_init(op); diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c index f1c8ec62e69f9..ce5ef0055d136 100644 --- a/drivers/thermal/qcom/tsens-v2.c +++ b/drivers/thermal/qcom/tsens-v2.c @@ -51,8 +51,9 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = { [INT_EN] = REG_FIELD(TM_INT_EN_OFF, 0, 2), /* TEMPERATURE THRESHOLDS */ - REG_FIELD_FOR_EACH_SENSOR16(LOW_THRESH, TM_Sn_UPPER_LOWER_THRESHOLD_OFF, 0, 11), - REG_FIELD_FOR_EACH_SENSOR16(UP_THRESH, TM_Sn_UPPER_LOWER_THRESHOLD_OFF, 12, 23), + REG_FIELD_FOR_EACH_SENSOR16(LOW_THRESH, TM_Sn_UPPER_LOWER_THRESHOLD_OFF, 0, 11), + REG_FIELD_FOR_EACH_SENSOR16(UP_THRESH, TM_Sn_UPPER_LOWER_THRESHOLD_OFF, 12, 23), + REG_FIELD_FOR_EACH_SENSOR16(CRIT_THRESH, TM_Sn_CRITICAL_THRESHOLD_OFF, 0, 11), /* INTERRUPTS [CLEAR/STATUS/MASK] */ REG_FIELD_SPLIT_BITS_0_15(LOW_INT_STATUS, TM_UPPER_LOWER_INT_STATUS_OFF), @@ -61,6 +62,9 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = { REG_FIELD_SPLIT_BITS_16_31(UP_INT_STATUS, TM_UPPER_LOWER_INT_STATUS_OFF), REG_FIELD_SPLIT_BITS_16_31(UP_INT_CLEAR, TM_UPPER_LOWER_INT_CLEAR_OFF), REG_FIELD_SPLIT_BITS_16_31(UP_INT_MASK, TM_UPPER_LOWER_INT_MASK_OFF), + REG_FIELD_SPLIT_BITS_0_15(CRIT_INT_STATUS, TM_CRITICAL_INT_STATUS_OFF), + REG_FIELD_SPLIT_BITS_0_15(CRIT_INT_CLEAR, TM_CRITICAL_INT_CLEAR_OFF), + REG_FIELD_SPLIT_BITS_0_15(CRIT_INT_MASK, TM_CRITICAL_INT_MASK_OFF), /* Sn_STATUS */ REG_FIELD_FOR_EACH_SENSOR16(LAST_TEMP, TM_Sn_STATUS_OFF, 0, 11), diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 015e7d2015985..70eae517d31b4 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -87,7 +87,7 @@ static const struct thermal_zone_of_device_ops tsens_of_ops = { static int tsens_register(struct tsens_priv *priv) { - int i, ret, irq; + int i, ret, irq, irq_crit; struct thermal_zone_device *tzd; struct platform_device *pdev; @@ -122,6 +122,30 @@ static int tsens_register(struct tsens_priv *priv) goto err_put_device; } + if (priv->feat->crit_int) { + /* We override ret to 0 i.e. don't return errors + * in this block to allow older DTs to continue working. + */ + + irq_crit = platform_get_irq_byname(pdev, "critical"); + if (irq_crit < 0) { + dev_warn(&pdev->dev, "Missing critical irq in DT\n"); + goto err_crit_int; + } + ret = devm_request_threaded_irq(&pdev->dev, irq_crit, + NULL, tsens_critical_irq_thread, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + dev_name(&pdev->dev), priv); + if (ret) { + dev_warn(&pdev->dev, "Failed to request critical irq\n"); + ret = 0; + goto err_crit_int; + } + + enable_irq_wake(irq_crit); + } + +err_crit_int: enable_irq_wake(irq); err_put_device: diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 70dc34c805377..05d5f73178683 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -23,6 +23,7 @@ struct tsens_priv; +/* IP version numbers in ascending order */ enum tsens_ver { VER_0_1 = 0, VER_1_X, @@ -32,6 +33,7 @@ enum tsens_ver { enum tsens_irq_type { LOWER, UPPER, + CRITICAL, }; /** @@ -374,6 +376,70 @@ enum regfield_ids { CRITICAL_STATUS_13, CRITICAL_STATUS_14, CRITICAL_STATUS_15, + CRIT_INT_STATUS_0, /* CRITICAL interrupt status */ + CRIT_INT_STATUS_1, + CRIT_INT_STATUS_2, + CRIT_INT_STATUS_3, + CRIT_INT_STATUS_4, + CRIT_INT_STATUS_5, + CRIT_INT_STATUS_6, + CRIT_INT_STATUS_7, + CRIT_INT_STATUS_8, + CRIT_INT_STATUS_9, + CRIT_INT_STATUS_10, + CRIT_INT_STATUS_11, + CRIT_INT_STATUS_12, + CRIT_INT_STATUS_13, + CRIT_INT_STATUS_14, + CRIT_INT_STATUS_15, + CRIT_INT_CLEAR_0, /* CRITICAL interrupt clear */ + CRIT_INT_CLEAR_1, + CRIT_INT_CLEAR_2, + CRIT_INT_CLEAR_3, + CRIT_INT_CLEAR_4, + CRIT_INT_CLEAR_5, + CRIT_INT_CLEAR_6, + CRIT_INT_CLEAR_7, + CRIT_INT_CLEAR_8, + CRIT_INT_CLEAR_9, + CRIT_INT_CLEAR_10, + CRIT_INT_CLEAR_11, + CRIT_INT_CLEAR_12, + CRIT_INT_CLEAR_13, + CRIT_INT_CLEAR_14, + CRIT_INT_CLEAR_15, + CRIT_INT_MASK_0, /* CRITICAL interrupt mask */ + CRIT_INT_MASK_1, + CRIT_INT_MASK_2, + CRIT_INT_MASK_3, + CRIT_INT_MASK_4, + CRIT_INT_MASK_5, + CRIT_INT_MASK_6, + CRIT_INT_MASK_7, + CRIT_INT_MASK_8, + CRIT_INT_MASK_9, + CRIT_INT_MASK_10, + CRIT_INT_MASK_11, + CRIT_INT_MASK_12, + CRIT_INT_MASK_13, + CRIT_INT_MASK_14, + CRIT_INT_MASK_15, + CRIT_THRESH_0, /* CRITICAL threshold values */ + CRIT_THRESH_1, + CRIT_THRESH_2, + CRIT_THRESH_3, + CRIT_THRESH_4, + CRIT_THRESH_5, + CRIT_THRESH_6, + CRIT_THRESH_7, + CRIT_THRESH_8, + CRIT_THRESH_9, + CRIT_THRESH_10, + CRIT_THRESH_11, + CRIT_THRESH_12, + CRIT_THRESH_13, + CRIT_THRESH_14, + CRIT_THRESH_15, MIN_STATUS_0, /* MIN threshold violated */ MIN_STATUS_1, MIN_STATUS_2, @@ -460,6 +526,8 @@ struct tsens_context { * @srot_map: pointer to SROT register address space * @tm_offset: deal with old device trees that don't address TM and SROT * address space separately + * @ul_lock: lock while processing upper/lower threshold interrupts + * @crit_lock: lock while processing critical threshold interrupts * @rf: array of regmap_fields used to store value of the field * @ctx: registers to be saved and restored during suspend/resume * @feat: features of the IP @@ -479,6 +547,9 @@ struct tsens_priv { /* lock for upper/lower threshold interrupts */ spinlock_t ul_lock; + /* lock for critical threshold interrupts */ + spinlock_t crit_lock; + struct regmap_field *rf[MAX_REGFIELDS]; struct tsens_context ctx; struct tsens_features *feat; @@ -500,6 +571,7 @@ int tsens_enable_irq(struct tsens_priv *priv); void tsens_disable_irq(struct tsens_priv *priv); int tsens_set_trips(void *_sensor, int low, int high); irqreturn_t tsens_irq_thread(int irq, void *data); +irqreturn_t tsens_critical_irq_thread(int irq, void *data); /* TSENS target */ extern struct tsens_plat_data data_8960;