From patchwork Mon Oct 4 11:25:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 12533729 X-Patchwork-Delegate: daniel.lezcano@linaro.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 263E5C433F5 for ; Mon, 4 Oct 2021 11:26:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DCAE613DB for ; Mon, 4 Oct 2021 11:26:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232938AbhJDL2B (ORCPT ); Mon, 4 Oct 2021 07:28:01 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:40342 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232926AbhJDL2B (ORCPT ); Mon, 4 Oct 2021 07:28:01 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 194BQA3f014215; Mon, 4 Oct 2021 06:26:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1633346770; bh=+wmqoUYc5BcF3LKTzfsWSLC7Y4cyYXN3qU287WhrCz0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Pfsnmu2891lj3YHcVpHhf5OxF6sNIVWQESAo683SdjFdQrG+RqtgbwR+CLG8FRWNc whwGcnKWiznk5QhbsuZMjyUSI0fi+EgnW7dMbyUiwId/2rX7iOTtJOKog/LAb35T4S 1kXhc55S6xK6v77yqotL7tqt6xyRuilsA3qVMwp0= Received: from DFLE105.ent.ti.com (dfle105.ent.ti.com [10.64.6.26]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 194BQAo4023229 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 4 Oct 2021 06:26:10 -0500 Received: from DFLE112.ent.ti.com (10.64.6.33) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Mon, 4 Oct 2021 06:26:09 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Mon, 4 Oct 2021 06:26:09 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 194BQ382065426; Mon, 4 Oct 2021 06:26:07 -0500 From: Keerthy To: , , , , CC: , , , Subject: [PATCH 1/4] dt-bindings: thermal: k3-j72xx: Add VTM bindings documentation Date: Mon, 4 Oct 2021 16:55:47 +0530 Message-ID: <20211004112550.27546-2-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211004112550.27546-1-j-keerthy@ti.com> References: <20211004112550.27546-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add VTM bindings documentation. In the Voltage Thermal Management Module(VTM), K3 J72XX 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 --- .../bindings/thermal/ti,j72xx-thermal.yaml | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml diff --git a/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml new file mode 100644 index 000000000000..ccf1bd3640ee --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/thermal/ti,j72xx-thermal.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments J72XX VTM (DTS) binding + +maintainers: + - Keerthy + +properties: + compatible: + const: ti,j721e-vtm + + reg: + maxItems: 3 + + power-domains: + maxItems: 1 + + "#thermal-sensor-cells": + const: 1 + +required: + - compatible + - reg + - power-domains + - "#thermal-sensor-cells" + +additionalProperties: false + +examples: + - | + #include + wkup_vtm0: wkup_vtm0@42040000 { + compatible = "ti,j721e-vtm", "ti,j7200-vtm"; + reg = <0x0 0x42040000 0x0 0x350>, + <0x0 0x42050000 0x0 0x350>, + <0x0 0x43000300 0x0 0x10>; + power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>; + #thermal-sensor-cells = <1>; + }; + + mpu_thermal: mpu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 0>; + + trips { + mpu_crit: mpu_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; + }; +... From patchwork Mon Oct 4 11:25:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 12533821 X-Patchwork-Delegate: daniel.lezcano@linaro.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCAFBC43219 for ; Mon, 4 Oct 2021 12:31:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE9D361269 for ; Mon, 4 Oct 2021 12:31:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231613AbhJDMdl (ORCPT ); Mon, 4 Oct 2021 08:33:41 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:56238 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232591AbhJDMdk (ORCPT ); Mon, 4 Oct 2021 08:33:40 -0400 X-Greylist: delayed 3934 seconds by postgrey-1.27 at vger.kernel.org; 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Mon, 4 Oct 2021 06:26:12 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 194BQ383065426; Mon, 4 Oct 2021 06:26:10 -0500 From: Keerthy To: , , , , CC: , , , Subject: [PATCH 2/4] arm64: dts: ti: j721e: Add VTM node Date: Mon, 4 Oct 2021 16:55:48 +0530 Message-ID: <20211004112550.27546-3-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211004112550.27546-1-j-keerthy@ti.com> References: <20211004112550.27546-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org VTM stands for Voltage Thermal Management Signed-off-by: Keerthy --- .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 9 +++ arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi | 73 +++++++++++++++++++ arch/arm64/boot/dts/ti/k3-j721e.dtsi | 4 + 3 files changed, 86 insertions(+) create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi index d2dceda72fe9..fafc07848f86 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi @@ -390,4 +390,13 @@ ti,loczrama = <1>; }; }; + + wkup_vtm0: wkup_vtm0@42040000 { + compatible = "ti,j721e-vtm"; + reg = <0x0 0x42040000 0x0 0x350>, + <0x0 0x42050000 0x0 0x350>, + <0x0 0x43000300 0x0 0x10>; + power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>; + #thermal-sensor-cells = <1>; + }; }; diff --git a/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi new file mode 100644 index 000000000000..e922042f356f --- /dev/null +++ b/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +wkup_thermal: wkup_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 0>; + + trips { + wkup_crit: wkup_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +mpu_thermal: mpu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 1>; + + trips { + mpu_crit: mpu_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +c7x_thermal: c7x_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 2>; + + trips { + c7x_crit: c7x_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +gpu_thermal: gpu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 3>; + + trips { + gpu_crit: gpu_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +r5f_thermal: r5f_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 4>; + + trips { + r5f_crit: r5f_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; diff --git a/arch/arm64/boot/dts/ti/k3-j721e.dtsi b/arch/arm64/boot/dts/ti/k3-j721e.dtsi index f0587fde147e..20e26a359aaf 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j721e.dtsi @@ -177,6 +177,10 @@ <0x07 0x00000000 0x07 0x00000000 0x01 0x00000000>; /* FSS OSPI1 data region 3*/ }; }; + + thermal_zones: thermal-zones { + #include "k3-j721e-thermal.dtsi" + }; }; /* Now include the peripherals for each bus segments */ From patchwork Mon Oct 4 11:25:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 12533819 X-Patchwork-Delegate: daniel.lezcano@linaro.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCFA7C433F5 for ; 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Mon, 4 Oct 2021 06:26:16 -0500 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Mon, 4 Oct 2021 06:26:16 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Mon, 4 Oct 2021 06:26:16 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 194BQ384065426; Mon, 4 Oct 2021 06:26:13 -0500 From: Keerthy To: , , , , CC: , , , Subject: [PATCH 3/4] arm64: dts: ti: j7200: Add VTM node Date: Mon, 4 Oct 2021 16:55:49 +0530 Message-ID: <20211004112550.27546-4-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211004112550.27546-1-j-keerthy@ti.com> References: <20211004112550.27546-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org VTM stands for Voltage Thermal Management Signed-off-by: Keerthy --- .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi | 9 ++++ arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi | 45 +++++++++++++++++++ arch/arm64/boot/dts/ti/k3-j7200.dtsi | 4 ++ 3 files changed, 58 insertions(+) create mode 100644 arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi index 1044ec6c4b0d..2b5c570253cc 100644 --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi @@ -375,4 +375,13 @@ ti,loczrama = <1>; }; }; + + wkup_vtm0: wkup_vtm0@42040000 { + compatible = "ti,j7200-vtm"; + reg = <0x0 0x42040000 0x0 0x350>, + <0x0 0x42050000 0x0 0x350>, + <0x0 0x43000300 0x0 0x10>; + power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>; + #thermal-sensor-cells = <1>; + }; }; diff --git a/arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi new file mode 100644 index 000000000000..1f18f9dcd3e9 --- /dev/null +++ b/arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +mcu_thermal: mcu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 0>; + + trips { + wkup_crit: wkup_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +mpu_thermal: mpu_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 1>; + + trips { + mpu_crit: mpu_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; + +main_thermal: main_thermal { + polling-delay-passive = <250>; /* milliseconds */ + polling-delay = <500>; /* milliseconds */ + thermal-sensors = <&wkup_vtm0 2>; + + trips { + c7x_crit: c7x_crit { + temperature = <125000>; /* milliCelsius */ + hysteresis = <2000>; /* milliCelsius */ + type = "critical"; + }; + }; +}; diff --git a/arch/arm64/boot/dts/ti/k3-j7200.dtsi b/arch/arm64/boot/dts/ti/k3-j7200.dtsi index b7005b803149..649d1d60f5c7 100644 --- a/arch/arm64/boot/dts/ti/k3-j7200.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j7200.dtsi @@ -165,6 +165,10 @@ <0x07 0x00000000 0x07 0x00000000 0x01 0x00000000>; /* FSS OSPI1 data region 3 */ }; }; + + thermal_zones: thermal-zones { + #include "k3-j7200-thermal.dtsi" + }; }; /* Now include the peripherals for each bus segments */ From patchwork Mon Oct 4 11:25:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "J, KEERTHY" X-Patchwork-Id: 12533731 X-Patchwork-Delegate: daniel.lezcano@linaro.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B177C433EF for ; Mon, 4 Oct 2021 11:26:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5FAA61994 for ; Mon, 4 Oct 2021 11:26:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232947AbhJDL2R (ORCPT ); Mon, 4 Oct 2021 07:28:17 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:40388 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232964AbhJDL2L (ORCPT ); Mon, 4 Oct 2021 07:28:11 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 194BQK3D014240; 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Mon, 4 Oct 2021 06:26:19 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 194BQ385065426; Mon, 4 Oct 2021 06:26:16 -0500 From: Keerthy To: , , , , CC: , , , Subject: [PATCH 4/4] thermal: k3_j72xx_bandgap: Add the bandgap driver support Date: Mon, 4 Oct 2021 16:55:50 +0530 Message-ID: <20211004112550.27546-5-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211004112550.27546-1-j-keerthy@ti.com> References: <20211004112550.27546-1-j-keerthy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add VTM thermal support. In the Voltage Thermal Management Module(VTM), K3 J72XX 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. Currently reading temperatures only is supported. There are no active/passive cooling agent supported. J721e SoCs have errata i2128: https://www.ti.com/lit/pdf/sprz455 The VTM Temperature Monitors (TEMPSENSORs) are trimmed during production, with the resulting values stored in software-readable registers. Software should use these register values when translating the Temperature Monitor output codes to temperature values. It has an involved workaround. Software needs to read the error codes for -40C, 30C, 125C from the efuse for each device & derive a new look up table for adc to temperature conversion. Involved calculating slopes & constants using 3 different straight line equations with adc refernce codes as the y-axis & error codes in the x-axis. -40C to 30C 30C to 125C 125C to 150C With the above 2 line equations we derive the full look-up table to workaround the errata i2128 for j721e SoC. Tested temperature reading on J721e SoC & J7200 SoC. Signed-off-by: Keerthy --- drivers/thermal/Makefile | 2 +- drivers/thermal/k3_j72xx_bandgap.c | 772 +++++++++++++++++++++++++++++ 2 files changed, 773 insertions(+), 1 deletion(-) create mode 100644 drivers/thermal/k3_j72xx_bandgap.c diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 82fc3e616e54..6dcaf2028ddc 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -28,7 +28,7 @@ thermal_sys-$(CONFIG_CPU_IDLE_THERMAL) += cpuidle_cooling.o # devfreq cooling thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o -obj-$(CONFIG_K3_THERMAL) += k3_bandgap.o +obj-$(CONFIG_K3_THERMAL) += k3_bandgap.o k3_j72xx_bandgap.o # platform thermal drivers obj-y += broadcom/ obj-$(CONFIG_THERMAL_MMIO) += thermal_mmio.o diff --git a/drivers/thermal/k3_j72xx_bandgap.c b/drivers/thermal/k3_j72xx_bandgap.c new file mode 100644 index 000000000000..56d1bfba37aa --- /dev/null +++ b/drivers/thermal/k3_j72xx_bandgap.c @@ -0,0 +1,772 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TI Bandgap temperature sensor driver for J72XX SoC Family + * + * Copyright (C) 2021 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 0x300 +#define K3_VTM_MISC_CTRL_OFFSET 0xc +#define K3_VTM_TMPSENS_STAT_OFFSET 0x8 +#define K3_VTM_ANYMAXT_OUTRG_ALERT_EN 0x1 +#define K3_VTM_MISC_CTRL2_OFFSET 0x10 +#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_TMPSENS_CTRL_MAXT_OUTRG_EN BIT(11) + +#define K3_VTM_CORRECTION_TEMP_CNT 3 + +#define K3_VTM_ADC_BEGIN_VAL 6 +#define K3_VTM_ADC_END_VAL 944 + +#define MINUS40CREF 5 +#define PLUS30CREF 253 +#define PLUS125CREF 730 +#define PLUS150CREF 940 + +#define MAX_TEMP 123000 +#define COOL_DOWN_TEMP 105000 + +//#define DEBUG_VTM + +static int derived_array[1024]; + +/* Reference Look up table when work around is NOT needed */ +static const int pvt_poly_golden[] = { + -49002, -48677, -48352, -48028, -47704, -47381, -47057, -46734, -46412, + -46090, -45768, -45446, -45125, -44804, -44484, -44163, -43844, -43524, + -43205, -42886, -42567, -42249, -41931, -41614, -41297, -40980, -40663, + -40347, -40031, -39716, -39400, -39085, -38771, -38457, -38143, -37829, + -37516, -37203, -36890, -36578, -36266, -35955, -35643, -35332, -35022, + -34712, -34402, -34092, -33783, -33474, -33165, -32857, -32549, -32241, + -31934, -31626, -31320, -31013, -30707, -30401, -30096, -29791, -29486, + -29182, -28877, -28573, -28270, -27967, -27664, -27361, -27059, -26757, + -26455, -26154, -25853, -25552, -25252, -24952, -24652, -24353, -24054, + -23755, -23456, -23158, -22860, -22563, -22265, -21968, -21672, -21376, + -21079, -20784, -20488, -20193, -19899, -19604, -19310, -19016, -18723, + -18429, -18136, -17844, -17551, -17259, -16968, -16676, -16385, -16094, + -15804, -15514, -15224, -14934, -14645, -14356, -14067, -13779, -13491, + -13203, -12916, -12628, -12342, -12055, -11769, -11483, -11197, -10912, + -10627, -10342, -10057, -9773, -9489, -9206, -8922, -8639, -8357, -8074, + -7792, -7510, -7229, -6947, -6666, -6386, -6105, -5825, -5546, -5266, + -4987, -4708, -4429, -4151, -3873, -3595, -3318, -3041, -2764, -2487, + -2211, -1935, -1659, -1384, -1108, -834, -559, -285, -11, 263, 537, 810, + 1083, 1355, 1628, 1900, 2171, 2443, 2714, 2985, 3255, 3526, 3796, 4066, + 4335, 4604, 4873, 5142, 5410, 5679, 5946, 6214, 6481, 6748, 7015, 7281, + 7548, 7813, 8079, 8344, 8609, 8874, 9139, 9403, 9667, 9931, 10194, + 10457, 10720, 10983, 11245, 11507, 11769, 12030, 12292, 12553, 12813, + 13074, 13334, 13594, 13854, 14113, 14372, 14631, 14889, 15148, 15406, + 15664, 15921, 16178, 16435, 16692, 16948, 17205, 17461, 17716, 17972, + 18227, 18482, 18736, 18991, 19245, 19498, 19752, 20005, 20258, 20511, + 20764, 21016, 21268, 21520, 21771, 22022, 22273, 22524, 22774, 23025, + 23274, 23524, 23774, 24023, 24272, 24520, 24769, 25017, 25265, 25512, + 25760, 26007, 26254, 26500, 26747, 26993, 27239, 27484, 27730, 27975, + 28220, 28464, 28708, 28953, 29196, 29440, 29683, 29927, 30169, 30412, + 30654, 30896, 31138, 31380, 31621, 31862, 32103, 32344, 32584, 32824, + 33064, 33304, 33543, 33783, 34022, 34260, 34499, 34737, 34975, 35213, + 35450, 35687, 35924, 36161, 36397, 36634, 36870, 37105, 37341, 37576, + 37811, 38046, 38281, 38515, 38749, 38983, 39217, 39450, 39683, 39916, + 40149, 40381, 40614, 40846, 41077, 41309, 41540, 41771, 42002, 42233, + 42463, 42693, 42923, 43153, 43382, 43611, 43840, 44069, 44297, 44526, + 44754, 44981, 45209, 45436, 45663, 45890, 46117, 46343, 46570, 46796, + 47021, 47247, 47472, 47697, 47922, 48147, 48371, 48595, 48819, 49043, + 49266, 49490, 49713, 49935, 50158, 50380, 50603, 50824, 51046, 51268, + 51489, 51710, 51931, 52151, 52372, 52592, 52812, 53031, 53251, 53470, + 53689, 53908, 54127, 54345, 54563, 54781, 54999, 55217, 55434, 55651, + 55868, 56085, 56301, 56517, 56733, 56949, 57165, 57380, 57595, 57810, + 58025, 58239, 58454, 58668, 58882, 59095, 59309, 59522, 59735, 59948, + 60160, 60373, 60585, 60797, 61009, 61220, 61432, 61643, 61854, 62064, + 62275, 62485, 62695, 62905, 63115, 63324, 63534, 63743, 63952, 64160, + 64369, 64577, 64785, 64993, 65200, 65408, 65615, 65822, 66029, 66236, + 66442, 66648, 66854, 67060, 67266, 67471, 67676, 67881, 68086, 68291, + 68495, 68699, 68903, 69107, 69311, 69514, 69717, 69920, 70123, 70326, + 70528, 70730, 70932, 71134, 71336, 71537, 71738, 71939, 72140, 72341, + 72541, 72742, 72942, 73142, 73341, 73541, 73740, 73939, 74138, 74337, + 74535, 74733, 74932, 75130, 75327, 75525, 75722, 75919, 76116, 76313, + 76510, 76706, 76902, 77098, 77294, 77490, 77685, 77881, 78076, 78271, + 78465, 78660, 78854, 79048, 79242, 79436, 79630, 79823, 80016, 80210, + 80402, 80595, 80788, 80980, 81172, 81364, 81556, 81747, 81939, 82130, + 82321, 82512, 82702, 82893, 83083, 83273, 83463, 83653, 83843, 84032, + 84221, 84410, 84599, 84788, 84976, 85165, 85353, 85541, 85728, 85916, + 86103, 86291, 86478, 86665, 86851, 87038, 87224, 87411, 87597, 87782, + 87968, 88154, 88339, 88524, 88709, 88894, 89078, 89263, 89447, 89631, + 89815, 89999, 90182, 90366, 90549, 90732, 90915, 91098, 91280, 91463, + 91645, 91827, 92009, 92191, 92372, 92554, 92735, 92916, 93097, 93277, + 93458, 93638, 93818, 93998, 94178, 94358, 94537, 94717, 94896, 95075, + 95254, 95433, 95611, 95790, 95968, 96146, 96324, 96501, 96679, 96856, + 97033, 97211, 97387, 97564, 97741, 97917, 98093, 98269, 98445, 98621, + 98797, 98972, 99147, 99322, 99497, 99672, 99847, 100021, 100196, 100370, + 100544, 100718, 100891, 101065, 101238, 101411, 101584, 101757, 101930, + 102103, 102275, 102447, 102619, 102791, 102963, 103135, 103306, 103478, + 103649, 103820, 103991, 104161, 104332, 104502, 104673, 104843, 105013, + 105182, 105352, 105522, 105691, 105860, 106029, 106198, 106367, 106535, + 106704, 106872, 107040, 107208, 107376, 107544, 107711, 107878, 108046, + 108213, 108380, 108546, 108713, 108880, 109046, 109212, 109378, 109544, + 109710, 109875, 110041, 110206, 110371, 110536, 110701, 110866, 111030, + 111195, 111359, 111523, 111687, 111851, 112015, 112178, 112342, 112505, + 112668, 112831, 112994, 113157, 113319, 113482, 113644, 113806, 113968, + 114130, 114292, 114453, 114615, 114776, 114937, 115098, 115259, 115420, + 115580, 115741, 115901, 116061, 116221, 116381, 116541, 116701, 116860, + 117019, 117179, 117338, 117497, 117655, 117814, 117973, 118131, 118289, + 118447, 118605, 118763, 118921, 119078, 119236, 119393, 119550, 119707, + 119864, 120021, 120178, 120334, 120490, 120647, 120803, 120959, 121115, + 121270, 121426, 121581, 121737, 121892, 122047, 122202, 122356, 122511, + 122666, 122820, 122974, 123128, 123282, 123436, 123590, 123744, 123897, + 124050, 124204, 124357, 124510, 124662, 124815, 124968, 125120, 125273, + 125425, 125577, 125729, 125881, 126032, 126184, 126335, 126487, 126638, + 126789, 126940, 127091, 127241, 127392, 127542, 127693, 127843, 127993, + 128143, 128293, 128442, 128592, 128741, 128891, 129040, 129189, 129338, + 129487, 129635, 129784, 129932, 130081, 130229, 130377, 130525, 130673, + 130821, 130968, 131116, 131263, 131410, 131558, 131705, 131851, 131998, + 132145, 132291, 132438, 132584, 132730, 132876, 133022, 133168, 133314, + 133460, 133605, 133750, 133896, 134041, 134186, 134331, 134476, 134620, + 134765, 134909, 135054, 135198, 135342, 135486, 135630, 135773, 135917, + 136061, 136204, 136347, 136491, 136634, 136777, 136919, 137062, 137205, + 137347, 137490, 137632, 137774, 137916, 138058, 138200, 138342, 138483, + 138625, 138766, 138907, 139049, 139190, 139331, 139471, 139612, 139753, + 139893, 140034, 140174, 140314, 140454, 140594, 140734, 140874, 141013, + 141153, 141292, 141432, 141571, 141710, 141849, 141988, 142127, 142265, + 142404, 142542, 142681, 142819, 142957, 143095, 143233, 143371, 143509, + 143646, 143784, 143921, 144058, 144196, 144333, 144470, 144607, 144743, + 144880, 145017, 145153, 145289, 145426, 145562, 145698, 145834, 145970, + 146105, 146241, 146377, 146512, 146647, 146783, 146918, 147053, 147188, + 147323, 147457, 147592, 147727, 147861, 147995, 148130, 148264, 148398, + 148532, 148666, 148799, 148933, 149067, 149200, 149333, 149467, 149600, + 149733, 149866, 149999, 150131, 150264, 150397, 150529, 150661, 150794, + 150926, 151058, 151190, 151322, 151454, 151585, 151717, 151848, 151980, + 152111, 152242, 152373, 152505, 152635, 152766, 152897, 153028, 153158, + 153289, 153419, 153549, 153680, 153810, 153940, 154070, 154199, 154329, + 154459, 154588, 154718, 154847, 154976, 155105, 155235, 155363, 155492, + 155621, 155750, 155879, 156007, 156135, 156264, 156392, 156520, 156648, + 156776, 156904, 157032, 157160, 157287, 157415, 157542, 157670, 157797, + 157924, 158051, 158178, 158305, 158432, 158559, 158685, 158812, 158938, + 159065, 159191, 159317, 159443, 159569, +}; + +/* Reference Look up table when work around is needed */ +static const int pvt_poly[] = { + -41523, -41210, -40898, -40586, -40274, -39963, -39651, -39340, -39029, + -38718, -38408, -38098, -37788, -37478, -37168, -36859, -36550, -36241, + -35933, -35624, -35316, -35008, -34701, -34393, -34086, -33779, -33472, + -33166, -32859, -32553, -32247, -31942, -31636, -31331, -31026, -30722, + -30417, -30113, -29809, -29505, -29202, -28899, -28596, -28293, -27990, + -27688, -27386, -27084, -26782, -26481, -26179, -25878, -25578, -25277, + -24977, -24677, -24377, -24078, -23778, -23479, -23180, -22882, -22583, + -22285, -21987, -21689, -21392, -21095, -20797, -20501, -20204, -19908, + -19612, -19316, -19020, -18725, -18430, -18135, -17840, -17545, -17251, + -16957, -16663, -16370, -16077, -15783, -15491, -15198, -14906, -14613, + -14321, -14030, -13738, -13447, -13156, -12865, -12575, -12284, -11994, + -11704, -11415, -11125, -10836, -10547, -10259, -9970, -9682, -9394, + -9106, -8819, -8531, -8244, -7957, -7671, -7384, -7098, -6812, -6527, + -6241, -5956, -5671, -5386, -5102, -4817, -4533, -4250, -3966, -3683, + -3399, -3117, -2834, -2551, -2269, -1987, -1706, -1424, -1143, -862, + -581, -300, -20, 260, 540, 820, 1099, 1378, 1657, 1936, 2215, 2493, + 2771, 3049, 3326, 3604, 3881, 4158, 4434, 4711, 4987, 5263, 5539, 5814, + 6089, 6364, 6639, 6914, 7188, 7462, 7736, 8010, 8283, 8556, 8829, 9102, + 9374, 9647, 9919, 10191, 10462, 10733, 11005, 11275, 11546, 11816, + 12087, 12357, 12626, 12896, 13165, 13434, 13703, 13971, 14240, 14508, + 14776, 15043, 15311, 15578, 15845, 16111, 16378, 16644, 16910, 17176, + 17441, 17707, 17972, 18237, 18501, 18766, 19030, 19294, 19557, 19821, + 20084, 20347, 20610, 20872, 21135, 21397, 21658, 21920, 22181, 22443, + 22703, 22964, 23225, 23485, 23745, 24005, 24264, 24523, 24782, 25041, + 25300, 25558, 25816, 26074, 26332, 26589, 26846, 27103, 27360, 27617, + 27873, 28129, 28385, 28640, 28896, 29151, 29406, 29660, 29915, 30169, + 30423, 30677, 30930, 31183, 31437, 31689, 31942, 32194, 32446, 32698, + 32950, 33201, 33452, 33703, 33954, 34205, 34455, 34705, 34955, 35204, + 35454, 35703, 35952, 36200, 36449, 36697, 36945, 37192, 37440, 37687, + 37934, 38181, 38427, 38674, 38920, 39166, 39411, 39657, 39902, 40147, + 40391, 40636, 40880, 41124, 41368, 41611, 41855, 42098, 42341, 42583, + 42826, 43068, 43310, 43551, 43793, 44034, 44275, 44516, 44756, 44997, + 45237, 45477, 45716, 45956, 46195, 46434, 46672, 46911, 47149, 47387, + 47625, 47862, 48100, 48337, 48573, 48810, 49046, 49282, 49518, 49754, + 49989, 50225, 50460, 50694, 50929, 51163, 51397, 51631, 51865, 52098, + 52331, 52564, 52797, 53029, 53261, 53493, 53725, 53956, 54188, 54419, + 54650, 54880, 55110, 55341, 55570, 55800, 56030, 56259, 56488, 56716, + 56945, 57173, 57401, 57629, 57856, 58084, 58311, 58538, 58764, 58991, + 59217, 59443, 59669, 59894, 60119, 60344, 60569, 60794, 61018, 61242, + 61466, 61690, 61913, 62136, 62359, 62582, 62804, 63026, 63249, 63470, + 63692, 63913, 64134, 64355, 64576, 64796, 65016, 65236, 65456, 65675, + 65894, 66113, 66332, 66551, 66769, 66987, 67205, 67423, 67640, 67857, + 68074, 68291, 68507, 68723, 68939, 69155, 69371, 69586, 69801, 70016, + 70230, 70445, 70659, 70873, 71086, 71300, 71513, 71726, 71939, 72151, + 72364, 72576, 72787, 72999, 73210, 73422, 73632, 73843, 74053, 74264, + 74474, 74683, 74893, 75102, 75311, 75520, 75729, 75937, 76145, 76353, + 76561, 76768, 76975, 77182, 77389, 77595, 77802, 78008, 78213, 78419, + 78624, 78829, 79034, 79239, 79443, 79647, 79851, 80055, 80259, 80462, + 80665, 80868, 81070, 81273, 81475, 81676, 81878, 82079, 82281, 82482, + 82682, 82883, 83083, 83283, 83483, 83682, 83882, 84081, 84280, 84478, + 84677, 84875, 85073, 85270, 85468, 85665, 85862, 86059, 86255, 86452, + 86648, 86844, 87039, 87234, 87430, 87625, 87819, 88014, 88208, 88402, + 88596, 88789, 88982, 89175, 89368, 89561, 89753, 89945, 90137, 90329, + 90520, 90712, 90903, 91093, 91284, 91474, 91664, 91854, 92044, 92233, + 92422, 92611, 92800, 92988, 93176, 93364, 93552, 93739, 93927, 94114, + 94301, 94487, 94673, 94860, 95045, 95231, 95417, 95602, 95787, 95971, + 96156, 96340, 96524, 96708, 96892, 97075, 97258, 97441, 97624, 97806, + 97988, 98170, 98352, 98533, 98714, 98895, 99076, 99257, 99437, 99617, + 99797, 99977, 100156, 100335, 100514, 100693, 100871, 101050, 101228, + 101405, 101583, 101760, 101937, 102114, 102291, 102467, 102643, 102819, + 102995, 103170, 103346, 103521, 103695, 103870, 104044, 104218, 104392, + 104566, 104739, 104912, 105085, 105258, 105430, 105603, 105775, 105946, + 106118, 106289, 106460, 106631, 106802, 106972, 107142, 107312, 107482, + 107651, 107820, 107989, 108158, 108327, 108495, 108663, 108831, 108998, + 109166, 109333, 109500, 109666, 109833, 109999, 110165, 110331, 110496, + 110661, 110827, 110991, 111156, 111320, 111484, 111648, 111812, 111975, + 112139, 112301, 112464, 112627, 112789, 112951, 113113, 113274, 113436, + 113597, 113758, 113918, 114079, 114239, 114399, 114559, 114718, 114877, + 115036, 115195, 115354, 115512, 115670, 115828, 115986, 116143, 116300, + 116457, 116614, 116770, 116926, 117082, 117238, 117394, 117549, 117704, + 117859, 118014, 118168, 118322, 118476, 118630, 118783, 118937, 119090, + 119242, 119395, 119547, 119699, 119851, 120003, 120154, 120305, 120456, + 120607, 120757, 120907, 121057, 121207, 121357, 121506, 121655, 121804, + 121953, 122101, 122249, 122397, 122545, 122692, 122839, 122986, 123133, + 123280, 123426, 123572, 123718, 123863, 124009, 124154, 124299, 124443, + 124588, 124732, 124876, 125020, 125163, 125306, 125449, 125592, 125735, + 125877, 126019, 126161, 126303, 126444, 126585, 126726, 126867, 127008, + 127148, 127288, 127428, 127567, 127707, 127846, 127985, 128123, 128262, + 128400, 128538, 128676, 128813, 128950, 129087, 129224, 129361, 129497, + 129633, 129769, 129905, 130040, 130175, 130310, 130445, 130579, 130713, + 130847, 130981, 131115, 131248, 131381, 131514, 131647, 131779, 131911, + 132043, 132175, 132306, 132438, 132569, 132699, 132830, 132960, 133090, + 133220, 133350, 133479, 133608, 133737, 133866, 133994, 134123, 134251, + 134378, 134506, 134633, 134760, 134887, 135014, 135140, 135266, 135392, + 135518, 135643, 135768, 135893, 136018, 136143, 136267, 136391, 136515, + 136638, 136762, 136885, 137008, 137130, 137253, 137375, 137497, 137619, + 137740, 137862, 137983, 138103, 138224, 138344, 138464, 138584, 138704, + 138823, 138943, 139062, 139180, 139299, 139417, 139535, 139653, 139770, + 139888, 140005, 140122, 140238, 140355, 140471, 140587, 140703, 140818, + 140933, 141048, 141163, 141278, 141392, 141506, 141620, 141734, 141847, + 141960, 142073, 142186, 142298, 142411, 142523, 142634, 142746, 142857, + 142968, 143079, 143190, 143300, 143410, 143520, 143630, 143740, 143849, + 143958, 144067, 144175, 144283, 144391, 144499, 144607, 144714, 144821, + 144928, 145035, 145142, 145248, 145354, 145459, 145565, 145670, 145775, + 145880, 145985, 146089, 146193, 146297, 146401, 146504, 146608, 146711, + 146813, 146916, 147018, 147120, 147222, 147324, 147425, 147526, 147627, + 147728, 147828, 147928, 148028, 148128, 148228, 148327, 148426, 148525, + 148623, 148722, 148820, 148918, 149015, 149113, 149210, 149307, 149404, + 149500, 149596, 149692, 149788, 149884, 149979, 150074, 150169, 150264, + 150358, 150452, 150546, 150640, 150733, 150827, 150920, 151013, 151105, + 151197, 151290, 151381, 151473, 151564, 151656, 151747, 151837, 151928, + 152018, 152108, 152198, 152287, 152377, 152466, 152555, 152643, 152732, + 152820, 152908, 152995, 153083, 153170, 153257, 153344, 153430, 153517, + 153603, 153689, 153774, 153860, 153945, 154030, 154114, 154199, 154283, + 154367, 154451, 154534, 154618, 154701, 154784, 154866, 154949, 155031, + 155113, 155194, 155276, 155357, 155438, 155519, 155599, 155680, 155760, + 155839, 155919, 155998, 156078, 156156, 156235, 156314, 156392, 156470, + 156547, 156625, 156702, 156779, 156856, 156933, 157009, 157085, 157161, +}; + +static void fill_table(int err1, int err2, int ref1, int ref2, int idx1, + int idx2) +{ + int m, c, num, den, i, err; + + /** + * Calculate the slope with adc values read from the register + * as the y-axis param and err in adc value as x-axis param + */ + if (err1 != err2) { + num = ref2 - ref1; + den = err2 - err1; + m = num / den; + c = ref2 - m * err2; + for (i = idx1; i <= idx2; i++) { + err = (i - c) / m; + if (((i + err1) < 0) || ((i + err1) > 1023)) + continue; + derived_array[i] = pvt_poly[i + err]; + } + } else { /* Constant error take care of divide by zero */ + for (i = idx1; i < idx2; i++) { + if (((i + err1) < 0) || ((i + err1) > 1023)) + continue; + derived_array[i] = pvt_poly[i + err1]; + } + } +} + +static int prep_lookup_table(int minus40cerr, int plus30cerr, int plus125cerr, + int plus150cerr) +{ + int start_temp, inc, i; + + /* Fill up the lookup table region -40C to +30C */ + fill_table(minus40cerr, plus30cerr, MINUS40CREF, PLUS30CREF, 0, + PLUS30CREF); + /* Fill up the lookup table region +30C to +125C */ + fill_table(plus30cerr, plus125cerr, PLUS30CREF, PLUS125CREF, PLUS30CREF, + PLUS125CREF); + /* Fill up the lookup table region +125C to +150C */ + fill_table(plus125cerr, plus150cerr, PLUS125CREF, PLUS150CREF, PLUS125CREF, + PLUS150CREF); + + /* Get to the first valid temperature */ + i = 0; + while (!derived_array[i]) + i++; + + start_temp = i; + /* + * Get to the last zero index and back fill the temperature for + * sake of continuity + */ + if (i) { + /* 300 milli celsius steps */ + while (i--) + derived_array[i] = derived_array[i + 1] - 300; + /* case 0 */ + derived_array[i] = derived_array[i + 1] - 300; + } + + /* + * Fill the last trailing 0s which are unfilled with increments of + * 100 milli celsius till 1023 code + */ + i = 1023; + while (!derived_array[i]) + i--; + + i++; + inc = 1; + while (i < 1024) { + derived_array[i] = derived_array[i - 1] + inc * 100; + i++; + } + + return 0; +} + +struct k3_thermal_data; + +struct k3_j72xx_bandgap { + struct device *dev; + void __iomem *base; + void __iomem *cfg2_base; + void __iomem *fuse_base; + const struct k3_j72xx_bandgap_data *conf; + spinlock_t lock; /* shields this struct */ + int ts_cnt; + struct k3_thermal_data *ts_data[K3_VTM_MAX_NUM_TS]; +}; + +/* common data structures */ +struct k3_thermal_data { + struct thermal_zone_device *ti_thermal; + struct thermal_cooling_device *cool_dev; + struct k3_j72xx_bandgap *bgp; + enum thermal_device_mode mode; + int sensor_id; + u32 ctrl_offset; + u32 stat_offset; + int prev_temp; + int ct_offsets[K3_VTM_CORRECTION_TEMP_CNT]; + int ct_bm[K3_VTM_CORRECTION_TEMP_CNT]; + int ref_adc_val[3]; + int act_adc_val[3]; + int slope[2]; + int coeff[2]; +}; + +int two_cmp(int tmp, int mask) +{ + tmp = ~(tmp); + tmp &= mask; + tmp += 1; + + /* Return negative value */ + return (0 - tmp); +} + +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 inline int k3_bgp_read_temp(struct k3_thermal_data *devdata, + int *temp) +{ + struct k3_j72xx_bandgap *bgp; + unsigned int dtemp, s0, s1, s2; + + bgp = devdata->bgp; + /* + * Errata is applicable for am654 pg 1.0 silicon/J7ES. There + * is a variation of the order for certain degree centigrade on AM654. + * Work around that by getting the average of two closest + * readings out of three readings everytime we want to + * report temperatures. + * + * Errata workaround. + */ + 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); + + if (dtemp < 0 || dtemp > 1023) + return -EINVAL; + + *temp = derived_array[dtemp]; + + return 0; +} + +/* 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 const struct thermal_zone_of_device_ops k3_of_thermal_ops = { + .get_temp = k3_thermal_get_temp, +}; + +static int k3_j72xx_bandgap_temp_to_adc_code(int temp) +{ + int low = 0, high = 1023, mid; + + if (temp > 160000 || temp < -50000) + return -EINVAL; + + /* Binary search to find the adc code */ + while (low < (high - 1)) { + mid = (low + high) / 2; + if (temp <= derived_array[mid]) + high = mid; + else + low = mid; + } + + return mid; +} + +static void get_efuse_values(int id, struct k3_thermal_data *data, int *err, + struct k3_j72xx_bandgap *bgp) +{ + int i, tmp, pow; + + /* Populate efuse reg offsets & Bit masks for -40C, 30C, 125C */ + switch (id) { + case 0: + data->ct_offsets[0] = 0x0; + data->ct_offsets[1] = 0x8; + data->ct_offsets[2] = 0x4; + data->ct_bm[0] = 0x3f; + data->ct_bm[1] = 0x1fe000; + data->ct_bm[2] = 0x1ff; + break; + + case 1: + data->ct_offsets[0] = 0x0; + data->ct_offsets[1] = 0x8; + data->ct_offsets[2] = 0x4; + data->ct_bm[0] = 0xfc0; + data->ct_bm[1] = 0x1fe00000; + data->ct_bm[2] = 0x3fe00; + break; + + case 2: + data->ct_offsets[0] = 0x0; + data->ct_offsets[1] = -1; + data->ct_offsets[2] = 0x4; + data->ct_bm[0] = 0x3f000; + data->ct_bm[1] = 0x7f800000; + data->ct_bm[2] = 0x7fc0000; + break; + + case 3: + data->ct_offsets[0] = 0x0; + data->ct_offsets[1] = 0xC; + data->ct_offsets[2] = -1; /* Spread across 2 registers */ + data->ct_bm[0] = 0xfc0000; + data->ct_bm[1] = 0x1fe0; + data->ct_bm[2] = 0x1f800000; + break; + + case 4: + data->ct_offsets[0] = 0x0; + data->ct_offsets[1] = 0xc; + data->ct_offsets[2] = 0x8; + data->ct_bm[0] = 0x3f000000; + data->ct_bm[1] = 0x1fe000; + data->ct_bm[2] = 0x1ff0; + break; + } + + for (i = 0; i < 3; i++) { + /* Extract the offset value using bit-mask */ + if (data->ct_offsets[i] == -1 && i == 1) { + /* 25C offset Case of Sensor 2 split between 2 regs */ + tmp = (readl(bgp->fuse_base + 0x8) & 0xE0000000) >> (29); + tmp |= ((readl(bgp->fuse_base + 0xC) & 0x1F) << 3); + pow = tmp & 0x80; + } else if (data->ct_offsets[i] == -1 && i == 2) { + /* 125C Case of Sensor 3 split between 2 regs */ + tmp = (readl(bgp->fuse_base + 0x4) & 0xF8000000) >> (27); + tmp |= ((readl(bgp->fuse_base + 0x8) & 0xF) << 5); + pow = tmp & 0x100; + } else { + tmp = readl(bgp->fuse_base + data->ct_offsets[i]); + tmp &= data->ct_bm[i]; + tmp = tmp >> __ffs(data->ct_bm[i]); + + /* Obtain the sign bit pow*/ + pow = data->ct_bm[i] >> __ffs(data->ct_bm[i]); + pow += 1; + pow /= 2; + } + + /* Check for negative value */ + if (tmp & pow) { + /* 2's complement value */ + tmp = two_cmp(tmp, data->ct_bm[i] >> __ffs(data->ct_bm[i])); + } + err[i] = tmp; + } +} + +#ifdef DEBUG_VTM +static void print_look_up_table(struct device *dev) +{ + int i; + + dev_info(dev, "The contents of derived array\n"); + dev_info(dev, "Code Temperaturei\n"); + for (i = 0; i <= 1023; i++) + dev_info(dev, "%d %d\n", i, derived_array[i]); +} +#endif + +static const struct of_device_id of_k3_j72xx_bandgap_match[]; + +struct k3_j72xx_bandgap_j72xx_data { + unsigned int workaround; +}; + +static int k3_j72xx_bandgap_probe(struct platform_device *pdev) +{ + int ret = 0, cnt, val, id, reg_cnt = 0, j; + int err[3], high_max, low_max; + struct resource *res; + struct device *dev = &pdev->dev; + struct k3_j72xx_bandgap *bgp; + struct k3_thermal_data *data; + int workaround_needed = 0; + const struct of_device_id *of_id; + const struct k3_j72xx_bandgap_j72xx_data *driver_data; + + bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL); + if (!bgp) + return -ENOMEM; + + 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); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + bgp->cfg2_base = devm_ioremap_resource(dev, res); + if (IS_ERR(bgp->cfg2_base)) + return PTR_ERR(bgp->cfg2_base); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + bgp->fuse_base = devm_ioremap_resource(dev, res); + if (IS_ERR(bgp->fuse_base)) + return PTR_ERR(bgp->fuse_base); + + of_id = of_match_device(of_k3_j72xx_bandgap_match, &pdev->dev); + if (of_id) { + driver_data = of_id->data; + workaround_needed = driver_data->workaround; + } + + 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; + } + + /* Workaround not needed if bit30/bit31 is set even for J721e */ + if (workaround_needed && (readl(bgp->fuse_base + 0x0) & 0xc0000000) == 0xc0000000) { + dev_info(bgp->dev, "work around NOT needed!!\n"); + workaround_needed = 0; + } + + /* 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 * 0x20; + data[id].stat_offset = data[id].ctrl_offset + + K3_VTM_TMPSENS_STAT_OFFSET; + + if (!workaround_needed) + goto prepare_lookup; + /* ref adc values for -40C, 30C & 125C respectively */ + data[id].ref_adc_val[0] = MINUS40CREF; + data[id].ref_adc_val[1] = PLUS30CREF; + data[id].ref_adc_val[2] = PLUS125CREF; + get_efuse_values(id, &data[id], err, bgp); + +prepare_lookup: + if (id == 0 && workaround_needed) { + prep_lookup_table(err[0], err[1], err[2], 0); + } else if (id == 0 && !workaround_needed) { + for (j = 0; j < (sizeof(pvt_poly_golden) / 4); j++) + derived_array[j] = pvt_poly_golden[j]; + } + + val = readl(data[id].bgp->cfg2_base + data[id].ctrl_offset); + val |= (K3_VTM_TMPSENS_CTRL_MAXT_OUTRG_EN | + K3_VTM_TMPSENS_CTRL_SOC | + K3_VTM_TMPSENS_CTRL_CLRZ | BIT(4)); + writel(val, data[id].bgp->cfg2_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); + } + + /* + * Program TSHUT thresholds + * Step 1: set the thresholds to ~123C and 105C WKUP_VTM_MISC_CTRL2 + * Step 2: WKUP_VTM_TMPSENS_CTRL_j set the MAXT_OUTRG_EN bit + * This is already taken care as per of init + * Step 3: WKUP_VTM_MISC_CTRL set the ANYMAXT_OUTRG_ALERT_EN bit + */ + high_max = k3_j72xx_bandgap_temp_to_adc_code(MAX_TEMP); + low_max = k3_j72xx_bandgap_temp_to_adc_code(COOL_DOWN_TEMP); + + writel((low_max << 16) | high_max, data[0].bgp->cfg2_base + + K3_VTM_MISC_CTRL2_OFFSET); + mdelay(100); + writel(K3_VTM_ANYMAXT_OUTRG_ALERT_EN, data[0].bgp->cfg2_base + + K3_VTM_MISC_CTRL_OFFSET); + + platform_set_drvdata(pdev, bgp); + +#ifdef DEBUG_VTM + print_look_up_table(dev); +#endif + return 0; + +err_alloc: + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static int k3_j72xx_bandgap_remove(struct platform_device *pdev) +{ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +const struct k3_j72xx_bandgap_j72xx_data k3_j72xx_bandgap_j721e_data = { + .workaround = 1, +}; + +const struct k3_j72xx_bandgap_j72xx_data k3_j72xx_bandgap_j7200_data = { + .workaround = 0, +}; + +static const struct of_device_id of_k3_j72xx_bandgap_match[] = { + { + .compatible = "ti,j721e-vtm", + .data = (void *)&k3_j72xx_bandgap_j721e_data, + }, + { + .compatible = "ti,j7200-vtm", + .data = (void *)&k3_j72xx_bandgap_j7200_data, + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, of_k3_j72xx_bandgap_match); + +static struct platform_driver k3_j72xx_bandgap_sensor_driver = { + .probe = k3_j72xx_bandgap_probe, + .remove = k3_j72xx_bandgap_remove, + .driver = { + .name = "k3-j72xx-soc-thermal", + .of_match_table = of_k3_j72xx_bandgap_match, + }, +}; + +module_platform_driver(k3_j72xx_bandgap_sensor_driver); + +MODULE_DESCRIPTION("K3 bandgap temperature sensor driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("J Keerthy ");