From patchwork Wed Feb 19 07:43:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 11390577 X-Patchwork-Delegate: daniel.lezcano@linaro.org 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 4A7D0138D for ; Wed, 19 Feb 2020 07:43:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C2EF2176D for ; Wed, 19 Feb 2020 07:43:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="d6XBh8b1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726779AbgBSHno (ORCPT ); Wed, 19 Feb 2020 02:43:44 -0500 Received: from lelv0142.ext.ti.com ([198.47.23.249]:42330 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726593AbgBSHnn (ORCPT ); Wed, 19 Feb 2020 02:43:43 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 01J7hSmU061552; Wed, 19 Feb 2020 01:43:28 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1582098208; bh=PNWw1vPsXXd7pyZC+YoP3S+7fl9U0ZvjIrhr2nCPkSI=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=d6XBh8b1W0tz3F4gcMV0sPJYNpUBuRfE5lsUd208QRix6+RAwu35PSApk6qov7apY J7QV2O2LeH/UkTxhXwO29zDpzE5/3XP0yvcZq7m7OAlmICvNHysCAFnDy5yMaXIGeT CTqsIcirupnKnsxPuPz7DBufpGDFFH58EEPmg8e8= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 01J7hS63125686 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 19 Feb 2020 01:43:28 -0600 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Wed, 19 Feb 2020 01:43:28 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Wed, 19 Feb 2020 01:43:28 -0600 Received: from a0393675ula.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 01J7hKCZ068778; Wed, 19 Feb 2020 01:43:24 -0600 From: Keerthy To: , , CC: , , , , , , , Subject: [PATCH v3 1/4] dt-bindings: thermal: k3: Add VTM bindings documentation Date: Wed, 19 Feb 2020 13:13:11 +0530 Message-ID: <20200219074314.22829-2-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200219074314.22829-1-j-keerthy@ti.com> References: <20200219074314.22829-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add VTM bindings documentation. In the Voltage Thermal Management Module(VTM), K3 AM654 supplies a voltage reference and a temperature sensor feature that are gathered in the band gap voltage and temperature sensor (VBGAPTS) module. The band gap provides current and voltage reference for its internal circuits and other analog IP blocks. The analog-to-digital converter (ADC) produces an output value that is proportional to the silicon temperature. Signed-off-by: Keerthy --- Changes in v3: * Fixed errors seen with: dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml .../bindings/thermal/ti,am654-thermal.yaml | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml diff --git a/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml new file mode 100644 index 000000000000..b6dc95c3acab --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/ti,am654-thermal.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/ti,am654-thermal.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments AM654 VTM (DTS) binding + +maintainers: + - Keerthy + +properties: + compatible: + const: ti,am654-vtm + + reg: + maxItems: 1 + + power-domains: + maxItems: 1 + description: phandle to the associated power domain + + "#thermal-sensor-cells": + const: 1 + +required: + - "#thermal-sensor-cells" + - compatible + - reg + - power-domains + +additionalProperties: false + +examples: + - | + #include + vtm: wkup_vtm0@42050000 { + compatible = "ti,am654-vtm"; + reg = <0x0 0x42050000 0x0 0x25c>; + power-domains = <&k3_pds 80 TI_SCI_PD_EXCLUSIVE>; + #thermal-sensor-cells = <1>; + }; + + mpu0_thermal: mpu0_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&vtm0 0>; + + trips { + mpu0_crit: mpu0_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; + }; +... From patchwork Wed Feb 19 07:43:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 11390571 X-Patchwork-Delegate: daniel.lezcano@linaro.org 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 304E214E3 for ; Wed, 19 Feb 2020 07:43:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F36592467B for ; Wed, 19 Feb 2020 07:43:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="xRBYIkQT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727614AbgBSHnq (ORCPT ); Wed, 19 Feb 2020 02:43:46 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:58332 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726671AbgBSHnp (ORCPT ); Wed, 19 Feb 2020 02:43:45 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 01J7hVS4072268; Wed, 19 Feb 2020 01:43:31 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1582098211; bh=uapNVEG9yzPzzHCfiqWNsRNDuZ8N+EzVKYYp/uUY9xQ=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=xRBYIkQT4TW+GpHUjyHGPGr8Ntz9oXpmu73ulyvzRAF2CLqjmOLCKW1hFRWCiCy36 H+sVWvn9crNAGsvnddl+OExjy5Xalluz3rdUWZlRzC2m6uQoWPyfllNfnLcQtzJK5G 7aCM90oD9ZCvXFjqNkRdF4IIuz4ZrtDDawi0r+Uo= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 01J7hVxr125727 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 19 Feb 2020 01:43:31 -0600 Received: from DFLE113.ent.ti.com (10.64.6.34) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Wed, 19 Feb 2020 01:43:31 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Wed, 19 Feb 2020 01:43:31 -0600 Received: from a0393675ula.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 01J7hKCa068778; Wed, 19 Feb 2020 01:43:28 -0600 From: Keerthy To: , , CC: , , , , , , , Subject: [PATCH v3 2/4] thermal: k3: Add support for bandgap sensors Date: Wed, 19 Feb 2020 13:13:12 +0530 Message-ID: <20200219074314.22829-3-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200219074314.22829-1-j-keerthy@ti.com> References: <20200219074314.22829-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The bandgap provides current and voltage reference for its internal circuits and other analog IP blocks. The analog-to-digital converter (ADC) produces an output value that is proportional to the silicon temperature. Currently reading temperatures and trend computing is supported as there are no active/passive cooling agent supported. Signed-off-by: Keerthy --- drivers/thermal/Kconfig | 12 ++ drivers/thermal/Makefile | 1 + drivers/thermal/k3_bandgap.c | 342 +++++++++++++++++++++++++++++++++++ 3 files changed, 355 insertions(+) create mode 100644 drivers/thermal/k3_bandgap.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 5a05db5438d6..fa598eddc7ac 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -251,6 +251,18 @@ config IMX_THERMAL cpufreq is used as the cooling device to throttle CPUs when the passive trip is crossed. +config K3_THERMAL + bool "Texas Instruments K3 thermal support" + depends on THERMAL + depends on ARCH_K3 || COMPILE_TEST + help + If you say yes here you get thermal support for the Texas Instruments + K3 SoC family. The current chip supported is: + - AM654 + + This includes temperature reading functionality and also trend + computation. + config MAX77620_THERMAL tristate "Temperature sensor driver for Maxim MAX77620 PMIC" depends on MFD_MAX77620 diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 9fb88e26fb10..5ad6535139ae 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -28,6 +28,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o # devfreq cooling thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o +obj-$(CONFIG_K3_THERMAL) += k3_bandgap.o # platform thermal drivers obj-y += broadcom/ obj-$(CONFIG_THERMAL_MMIO) += thermal_mmio.o diff --git a/drivers/thermal/k3_bandgap.c b/drivers/thermal/k3_bandgap.c new file mode 100644 index 000000000000..35d904eb9857 --- /dev/null +++ b/drivers/thermal/k3_bandgap.c @@ -0,0 +1,342 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TI Bandgap temperature sensor driver for K3 SoC Family + * + * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define K3_VTM_DEVINFO_PWR0_OFFSET 0x4 +#define K3_VTM_DEVINFO_PWR0_CVD_CT_MASK 0xf +#define K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK 0xf0 +#define K3_VTM_TMPSENS0_CTRL_OFFSET 0x80 +#define K3_VTM_REGS_PER_TS 0x10 +#define K3_VTM_TS_STAT_DTEMP_MASK 0x3ff +#define K3_VTM_MAX_NUM_TS 8 +#define K3_VTM_TMPSENS_CTRL_CBIASSEL BIT(0) +#define K3_VTM_TMPSENS_CTRL_SOC BIT(5) +#define K3_VTM_TMPSENS_CTRL_CLRZ BIT(6) +#define K3_VTM_TMPSENS_CTRL_CLKON_REQ BIT(7) + +#define K3_VTM_ADC_BEGIN_VAL 540 +#define K3_VTM_ADC_END_VAL 944 + +static const int k3_adc_to_temp[K3_VTM_ADC_END_VAL - K3_VTM_ADC_BEGIN_VAL + + 1] = { + -40000, -40000, -40000, -40000, -39800, -39400, -39000, -38600, -38200, + -37800, -37400, -37000, -36600, -36200, -35800, -35300, -34700, -34200, + -33800, -33400, -33000, -32600, -32200, -31800, -31400, -31000, -30600, + -30200, -29800, -29400, -29000, -28600, -28200, -27700, -27100, -26600, + -26200, -25800, -25400, -25000, -24600, -24200, -23800, -23400, -23000, + -22600, -22200, -21800, -21400, -21000, -20500, -19900, -19400, -19000, + -18600, -18200, -17800, -17400, -17000, -16600, -16200, -15800, -15400, + -15000, -14600, -14200, -13800, -13400, -13000, -12500, -11900, -11400, + -11000, -10600, -10200, -9800, -9400, -9000, -8600, -8200, -7800, -7400, + -7000, -6600, -6200, -5800, -5400, -5000, -4500, -3900, -3400, -3000, + -2600, -2200, -1800, -1400, -1000, -600, -200, 200, 600, 1000, 1400, + 1800, 2200, 2600, 3000, 3400, 3900, 4500, 5000, 5400, 5800, 6200, 6600, + 7000, 7400, 7800, 8200, 8600, 9000, 9400, 9800, 10200, 10600, 11000, + 11400, 11800, 12200, 12700, 13300, 13800, 14200, 14600, 15000, 15400, + 15800, 16200, 16600, 17000, 17400, 17800, 18200, 18600, 19000, 19400, + 19800, 20200, 20600, 21000, 21400, 21900, 22500, 23000, 23400, 23800, + 24200, 24600, 25000, 25400, 25800, 26200, 26600, 27000, 27400, 27800, + 28200, 28600, 29000, 29400, 29800, 30200, 30600, 31000, 31400, 31900, + 32500, 33000, 33400, 33800, 34200, 34600, 35000, 35400, 35800, 36200, + 36600, 37000, 37400, 37800, 38200, 38600, 39000, 39400, 39800, 40200, + 40600, 41000, 41400, 41800, 42200, 42600, 43100, 43700, 44200, 44600, + 45000, 45400, 45800, 46200, 46600, 47000, 47400, 47800, 48200, 48600, + 49000, 49400, 49800, 50200, 50600, 51000, 51400, 51800, 52200, 52600, + 53000, 53400, 53800, 54200, 54600, 55000, 55400, 55900, 56500, 57000, + 57400, 57800, 58200, 58600, 59000, 59400, 59800, 60200, 60600, 61000, + 61400, 61800, 62200, 62600, 63000, 63400, 63800, 64200, 64600, 65000, + 65400, 65800, 66200, 66600, 67000, 67400, 67800, 68200, 68600, 69000, + 69400, 69800, 70200, 70600, 71000, 71500, 72100, 72600, 73000, 73400, + 73800, 74200, 74600, 75000, 75400, 75800, 76200, 76600, 77000, 77400, + 77800, 78200, 78600, 79000, 79400, 79800, 80200, 80600, 81000, 81400, + 81800, 82200, 82600, 83000, 83400, 83800, 84200, 84600, 85000, 85400, + 85800, 86200, 86600, 87000, 87400, 87800, 88200, 88600, 89000, 89400, + 89800, 90200, 90600, 91000, 91400, 91800, 92200, 92600, 93000, 93400, + 93800, 94200, 94600, 95000, 95400, 95800, 96200, 96600, 97000, 97500, + 98100, 98600, 99000, 99400, 99800, 100200, 100600, 101000, 101400, + 101800, 102200, 102600, 103000, 103400, 103800, 104200, 104600, 105000, + 105400, 105800, 106200, 106600, 107000, 107400, 107800, 108200, 108600, + 109000, 109400, 109800, 110200, 110600, 111000, 111400, 111800, 112200, + 112600, 113000, 113400, 113800, 114200, 114600, 115000, 115400, 115800, + 116200, 116600, 117000, 117400, 117800, 118200, 118600, 119000, 119400, + 119800, 120200, 120600, 121000, 121400, 121800, 122200, 122600, 123000, + 123400, 123800, 124200, 124600, 124900, 125000, +}; + +struct k3_thermal_data; + +struct k3_bandgap { + struct device *dev; + void __iomem *base; + const struct k3_bandgap_data *conf; + spinlock_t lock; /* shields this struct */ + int ts_cnt; + u32 errata; + struct k3_thermal_data *ts_data[K3_VTM_MAX_NUM_TS]; +}; + +struct k3_vtm_driver_data { + u32 errata; +}; + +/* common data structures */ +struct k3_thermal_data { + struct thermal_zone_device *ti_thermal; + struct thermal_cooling_device *cool_dev; + struct k3_bandgap *bgp; + enum thermal_device_mode mode; + struct work_struct thermal_wq; + int sensor_id; + u32 ctrl_offset; + u32 stat_offset; + int prev_temp; +}; + +static unsigned int vtm_get_best_value(unsigned int s0, unsigned int s1, + unsigned int s2) +{ + int d01 = abs(s0 - s1); + int d02 = abs(s0 - s2); + int d12 = abs(s1 - s2); + + if (d01 <= d02 && d01 <= d12) + return (s0 + s1) / 2; + + if (d02 <= d01 && d02 <= d12) + return (s0 + s2) / 2; + + return (s1 + s2) / 2; +} + +static int k3_bgp_read_temp(struct k3_thermal_data *devdata, + int *temp) +{ + struct k3_bandgap *bgp; + unsigned int dtemp, s0, s1, s2; + + bgp = devdata->bgp; + /** + * Errata is applicable for am654 pg 1.0 silicon. There + * is a variation of the order for 8-10 degree centigrade. + * Work around that by getting the average of two closest + * readings out of three readings everytime we want to + * report temperatures. + * + * Errata workaround. + */ + + if (bgp->errata) { + s0 = readl(bgp->base + devdata->stat_offset) & + K3_VTM_TS_STAT_DTEMP_MASK; + s1 = readl(bgp->base + devdata->stat_offset) & + K3_VTM_TS_STAT_DTEMP_MASK; + s2 = readl(bgp->base + devdata->stat_offset) & + K3_VTM_TS_STAT_DTEMP_MASK; + dtemp = vtm_get_best_value(s0, s1, s2); + } else { + dtemp = readl(bgp->base + devdata->stat_offset) & + K3_VTM_TS_STAT_DTEMP_MASK; + } + + if (dtemp < K3_VTM_ADC_BEGIN_VAL || dtemp > K3_VTM_ADC_END_VAL) + return -EINVAL; + + *temp = k3_adc_to_temp[dtemp - K3_VTM_ADC_BEGIN_VAL]; + + return 0; +} + +/* thermal zone ops */ +/* Get temperature callback function for thermal zone */ +static int k3_thermal_get_temp(void *devdata, int *temp) +{ + struct k3_thermal_data *data = devdata; + int ret = 0; + + ret = k3_bgp_read_temp(data, temp); + if (ret) + return ret; + + data->prev_temp = *temp; + + return ret; +} + +static int k3_thermal_get_trend(void *p, int trip, enum thermal_trend *trend) +{ + struct k3_thermal_data *data = p; + struct k3_bandgap *bgp; + int ret = 0, temp = 0; + + bgp = data->bgp; + + ret = k3_bgp_read_temp(data, &temp); + if (ret) + return ret; + + if (temp > data->prev_temp) + *trend = THERMAL_TREND_RAISING; + else if (temp < data->prev_temp) + *trend = THERMAL_TREND_DROPPING; + else + *trend = THERMAL_TREND_STABLE; + + return 0; +} + +static const struct thermal_zone_of_device_ops k3_of_thermal_ops = { + .get_temp = k3_thermal_get_temp, + .get_trend = k3_thermal_get_trend, +}; + +static void k3_thermal_work(struct work_struct *work) +{ + struct k3_thermal_data *data = container_of(work, + struct k3_thermal_data, thermal_wq); + + thermal_zone_device_update(data->ti_thermal, THERMAL_EVENT_UNSPECIFIED); + + dev_dbg(&data->ti_thermal->device, "updated thermal zone %s\n", + data->ti_thermal->type); +} + +static const struct of_device_id of_k3_bandgap_match[]; + +static int k3_bandgap_probe(struct platform_device *pdev) +{ + int ret = 0, cnt, val, id, reg_cnt = 0; + struct resource *res; + struct device *dev = &pdev->dev; + struct k3_bandgap *bgp; + struct k3_thermal_data *data; + const struct k3_vtm_driver_data *drv_data; + + bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL); + if (!bgp) + return -ENOMEM; + + drv_data = of_device_get_match_data(&pdev->dev); + if (drv_data) + bgp->errata = drv_data->errata; + + bgp->dev = dev; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + bgp->base = devm_ioremap_resource(dev, res); + if (IS_ERR(bgp->base)) + return PTR_ERR(bgp->base); + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + pm_runtime_put_noidle(dev); + pm_runtime_disable(dev); + return ret; + } + + /* Get the sensor count in the VTM */ + val = readl(bgp->base + K3_VTM_DEVINFO_PWR0_OFFSET); + cnt = val & K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK; + cnt >>= __ffs(K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK); + bgp->ts_cnt = cnt; + + data = devm_kcalloc(bgp->dev, cnt, sizeof(*data), GFP_KERNEL); + if (!data) { + ret = -ENOMEM; + goto err_alloc; + } + + /* Register the thermal sensors */ + for (id = 0; id < cnt; id++) { + data[id].sensor_id = id; + data[id].bgp = bgp; + data[id].ctrl_offset = K3_VTM_TMPSENS0_CTRL_OFFSET + + id * K3_VTM_REGS_PER_TS; + data[id].stat_offset = data[id].ctrl_offset + 0x8; + INIT_WORK(&data[id].thermal_wq, k3_thermal_work); + + val = readl(data[id].bgp->base + data[id].ctrl_offset); + val |= (K3_VTM_TMPSENS_CTRL_SOC | + K3_VTM_TMPSENS_CTRL_CLRZ | + K3_VTM_TMPSENS_CTRL_CLKON_REQ); + val &= ~K3_VTM_TMPSENS_CTRL_CBIASSEL; + writel(val, data[id].bgp->base + data[id].ctrl_offset); + + bgp->ts_data[id] = &data[id]; + data[id].ti_thermal = + devm_thermal_zone_of_sensor_register(bgp->dev, id, + &data[id], + &k3_of_thermal_ops); + if (IS_ERR(data[id].ti_thermal)) { + dev_err(bgp->dev, "thermal zone device is NULL\n"); + ret = PTR_ERR(data[id].ti_thermal); + goto err_alloc; + } + + reg_cnt++; + + /* Initialize Previous temp */ + k3_thermal_get_temp(&data[id], &data[id].prev_temp); + } + + platform_set_drvdata(pdev, bgp); + + return 0; + +err_alloc: + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static int k3_bandgap_remove(struct platform_device *pdev) +{ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct k3_vtm_driver_data am654_data = { + .errata = 1, +}; + +static const struct of_device_id of_k3_bandgap_match[] = { + { + .compatible = "ti,am654-vtm", + .data = &am654_data, + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, of_k3_bandgap_match); + +static struct platform_driver k3_bandgap_sensor_driver = { + .probe = k3_bandgap_probe, + .remove = k3_bandgap_remove, + .driver = { + .name = "k3-soc-thermal", + .of_match_table = of_k3_bandgap_match, + }, +}; + +module_platform_driver(k3_bandgap_sensor_driver); + +MODULE_DESCRIPTION("K3 bandgap temperature sensor driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("J Keerthy "); From patchwork Wed Feb 19 07:43:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 11390575 X-Patchwork-Delegate: daniel.lezcano@linaro.org 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 CBE0D138D for ; Wed, 19 Feb 2020 07:43:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD09721D56 for ; Wed, 19 Feb 2020 07:43:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="l6xXsCOK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727291AbgBSHno (ORCPT ); Wed, 19 Feb 2020 02:43:44 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:58328 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726671AbgBSHno (ORCPT ); Wed, 19 Feb 2020 02:43:44 -0500 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 01J7ha0W072284; 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Wed, 19 Feb 2020 01:43:35 -0600 Received: from a0393675ula.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 01J7hKCb068778; Wed, 19 Feb 2020 01:43:31 -0600 From: Keerthy To: , , CC: , , , , , , , Subject: [PATCH v3 3/4] arm64: dts: ti: am654: Add thermal zones Date: Wed, 19 Feb 2020 13:13:13 +0530 Message-ID: <20200219074314.22829-4-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200219074314.22829-1-j-keerthy@ti.com> References: <20200219074314.22829-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The am654 SoC has three thermal zones namely MPU0, MPU1 and MCU zones Signed-off-by: Keerthy --- .../dts/ti/k3-am654-industrial-thermal.dtsi | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 arch/arm64/boot/dts/ti/k3-am654-industrial-thermal.dtsi diff --git a/arch/arm64/boot/dts/ti/k3-am654-industrial-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am654-industrial-thermal.dtsi new file mode 100644 index 000000000000..cdc3d40c3f60 --- /dev/null +++ b/arch/arm64/boot/dts/ti/k3-am654-industrial-thermal.dtsi @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +mpu0_thermal: mpu0_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 0>; + + trips { + mpu0_crit: mpu0_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +mpu1_thermal: mpu1_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 1>; + + trips { + mpu1_crit: mpu1_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +mcu_thermal: mcu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 2>; + + trips { + mcu_crit: mcu_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; From patchwork Wed Feb 19 07:43:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 11390573 X-Patchwork-Delegate: daniel.lezcano@linaro.org 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 8AC5714E3 for ; 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Wed, 19 Feb 2020 01:43:35 -0600 From: Keerthy To: , , CC: , , , , , , , Subject: [PATCH v3 4/4] arm64: dts: ti: am6: Add VTM node Date: Wed, 19 Feb 2020 13:13:14 +0530 Message-ID: <20200219074314.22829-5-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200219074314.22829-1-j-keerthy@ti.com> References: <20200219074314.22829-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org VTM stands for voltage and thermal management. Add the vtm node and the associated thermal zones on the SoC. Signed-off-by: Keerthy --- arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi index f4227e2743f2..e7ef96b621b3 100644 --- a/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi @@ -89,4 +89,15 @@ clocks = <&k3_clks 59 0>; clock-names = "gpio"; }; + + wkup_vtm0: wkup_vtm0@42050000 { + compatible = "ti,am654-vtm"; + reg = <0x42050000 0x25c>; + power-domains = <&k3_pds 80 TI_SCI_PD_EXCLUSIVE>; + #thermal-sensor-cells = <1>; + }; + + thermal_zones: thermal-zones { + #include "k3-am654-industrial-thermal.dtsi" + }; };