From patchwork Fri Nov 8 09:54:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "(Exiting) Baolin Wang" X-Patchwork-Id: 11234483 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 96F2B13BD for ; Fri, 8 Nov 2019 09:55:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 75A2921D7B for ; Fri, 8 Nov 2019 09:55:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="ZXIzhvrb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731435AbfKHJzv (ORCPT ); Fri, 8 Nov 2019 04:55:51 -0500 Received: from mail-il1-f194.google.com ([209.85.166.194]:37575 "EHLO mail-il1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731373AbfKHJzv (ORCPT ); Fri, 8 Nov 2019 04:55:51 -0500 Received: by mail-il1-f194.google.com with SMTP id s5so4611888iln.4 for ; Fri, 08 Nov 2019 01:55:49 -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; bh=spYWTHjb7/MYzsI9bYPcwS26fEghILksNMY9w8ImjM0=; b=ZXIzhvrbd4xxyWux72pPsvlPW99KePyYAt/Ja3nYluiduO6c00vIX+TC0Hp44xFrFf gOsQXi3l6l2Ok3XLfAtQopP3BCRIyDFf/tiJLz8G5Qi9hRXrPW7Q1KipED8u0TFo/YFT 6NcNpaRUi/NWOsLPT+U6r9d/QWrdh+i8ABP33IeTi1UuxB+2JJNIV97wZauPsBGAYSw9 DcrGud7Lk+STyaH/zkeCIEpzEmoier69vvVaRkpdG5CLs3sPcjZJbDh6dwWDm+KEdJEf 2KZWnkhgIcoBXlWVkCdHA0d6uWAfurQma5kglDFOlhDHyIa/MMZoqsHOJeEIeDRfF6oY iSpA== 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; bh=spYWTHjb7/MYzsI9bYPcwS26fEghILksNMY9w8ImjM0=; b=fQR665jFAGjzmHhU4peVH4iP5AGUpQaUO1dZI0A3qAXdkuW3NIkZF+/njqPtGrXWNv d66TeU7afRLUPZR0ebGj2Bz9D4D/9P+22Q+xz5o9voBi50mNERhvHV0R5f+keNA8J6BT 6yEe28xrgmGyR+xcnuOvR+ZpaSgRcmGj27m59qwmwUJzV0vz8UmmQRm1HBsiU7Vo8YaH BV94+Ml7I3rGw10/M75eEnwM7qba9RHnQ0g6fKs9stvmOnRBYTcRiaQnJOhaOjRpGmzf tt5bIdqg1X6bqRSZboQeAC3Git2xLaG979KB+4WBMybilSuPeDUdJyWWKbXm+CQ36ly2 DPEg== X-Gm-Message-State: APjAAAWvR5Y4Vn93herYKlCzpQAJoBO1SuRLwQVuYEMVR/R8gWJWt1B/ Or3mMmUeLGWn2KInCOOQRr3CbQ== X-Google-Smtp-Source: APXvYqxARYtwBC201uyHdNNTlDXaPFI6/906RtwY8BQdnP0JJkgmWvxjTofTB7u4fR8W6vOkU5NcSg== X-Received: by 2002:a17:90a:2a41:: with SMTP id d1mr12471267pjg.87.1573206948601; Fri, 08 Nov 2019 01:55:48 -0800 (PST) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.82]) by smtp.gmail.com with ESMTPSA id v14sm5019009pfe.94.2019.11.08.01.55.44 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 08 Nov 2019 01:55:47 -0800 (PST) From: Baolin Wang To: rui.zhang@intel.com, edubezval@gmail.com, daniel.lezcano@linaro.org, amit.kucheria@verdurent.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: orsonzhai@gmail.com, baolin.wang@linaro.org, baolin.wang7@gmail.com, freeman.liu@unisoc.com, zhang.lyra@gmail.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: thermal: sprd: Add the Spreadtrum thermal documentation Date: Fri, 8 Nov 2019 17:54:30 +0800 Message-Id: <0a6b113010ad772a633b9cfeeb280dc41f17b951.1573206815.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Freeman Liu Add the Spreadtrum thermal documentation. Signed-off-by: Freeman Liu Signed-off-by: Baolin Wang --- .../devicetree/bindings/thermal/sprd-thermal.txt | 41 ++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/sprd-thermal.txt diff --git a/Documentation/devicetree/bindings/thermal/sprd-thermal.txt b/Documentation/devicetree/bindings/thermal/sprd-thermal.txt new file mode 100644 index 0000000..a9da7f4 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/sprd-thermal.txt @@ -0,0 +1,41 @@ +* Spreadtrum thermal sensor controller bindings + +Required properties: +- compatible : Should be "sprd,ums512-thermal" +- reg: Address range of the thermal registers +- clock-names: "enable" for thermal module enable clock. +- clocks: Should contain a clock specifier for each entry in clock-names. +- nvmem-cells: A phandle to the calibration data provided by a nvmem device. +- nvmem-cell-names: Should be "thm_sign_cal" and "thm_ratio_cal". +- #thermal-sensor-cells: Should be 1. See ./thermal.txt for a description. + +Child nodes properties: +- reg: Specify the sensor id. +- nvmem-cells: A phandle to the calibration data provided by a nvmem device. +- nvmem-cell-names: Should be "sen_delta_cal". + +Example: + + ap_thm0: thermal@32200000 { + compatible = "sprd,ums512-thermal"; + reg = <0 0x32200000 0 0x10000>; + clock-names = "enable"; + clocks = <&aonapb_gate CLK_THM0_EB>; + #thermal-sensor-cells = <1>; + nvmem-cells = <&thm0_sign>, <&thm0_ratio>; + nvmem-cell-names = "thm_sign_cal", "thm_ratio_cal"; + + prometheus0-sensor@0{ + reg = <0>; + nvmem-cells = <&thm0_sen0>; + nvmem-cell-names = "sen_delta_cal"; + }; + + ank1-sensor@1{ + reg = <1>; + nvmem-cells = <&thm0_sen1>; + nvmem-cell-names = "sen_delta_cal"; + }; + + ...... + }; From patchwork Fri Nov 8 09:54:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "(Exiting) Baolin Wang" X-Patchwork-Id: 11234485 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 7873A13BD for ; Fri, 8 Nov 2019 09:55:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 393AC21D7E for ; Fri, 8 Nov 2019 09:55:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="pfChcpvf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731463AbfKHJzy (ORCPT ); Fri, 8 Nov 2019 04:55:54 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:38566 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731358AbfKHJzy (ORCPT ); Fri, 8 Nov 2019 04:55:54 -0500 Received: by mail-pf1-f195.google.com with SMTP id c13so4232479pfp.5 for ; Fri, 08 Nov 2019 01:55:54 -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=sa4c9TQszBnSFJ6Tmvd40ZWGEUtTre7H0PZsyqt7VNs=; b=pfChcpvfIXQU7c/BIXwPJjdERIekzJIKphdRzLrTHM99UYRjaZBDCZPa+uEeiHYo1f cFIAd2meMi3yH1k/rGw24+9qpTTVlEyZzgWpK2eXmy2XtZJHGlll+7fBTG6S52B4CABK Q2CQU5ZCpy/bSTqMl2U2ZjgCeQbKNIalFf/aAXRapn4Vf6qlgi/S7uPm/ghoNUMUgn9y +udQgO6CCm9PwVKqysAeUjc4kkPmxGhefsDnXs4f6wgW3RZbSrVvmUIgufpwHk+H/ZAU xOKaZd4xz1SzI8gD8pgj55LPd48SY3ciyRd3hj2dEfToUdzpeRqfx4xqXV9VhXO7wiP0 zCcg== 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=sa4c9TQszBnSFJ6Tmvd40ZWGEUtTre7H0PZsyqt7VNs=; b=dNJCiFBoB0IT0U+UZghmkvDhwHO49N1PY0gGG5AK56aysjL0nrH9GiZauz3T/Q4SGB nEjsDrjk76w/3qTMKjiTBIoxBi4T+yXig4ayVLWJ0NhXXMM23u4jCkXNjaDKH03te1An SforusBDerfHdf9YwPqtOcn5aSwtjRHug1koi6NO1aBIc/GCYKxtPdfnw0HVvv93lgiD Dt1rcAmYIg5ZAHZh3xLjv5MUVo07jKmznAWZm16Jjd9Sna7njmDzW5m8iuNM1LEdNmXs ER01Mx+JSJ+WYH0CchSKCS/E1dFtTRrNTRweeUj/33AMAxe9rwtmadzNQT+HwcSLqh5P rFGw== X-Gm-Message-State: APjAAAWYMHljzEcwzAcl43CAMIfTnQIjPfotkRZWAHxyPQewYaefYgna eWiJfvWVAoXCWfNdimX0APtp1Q== X-Google-Smtp-Source: APXvYqwo+r2dFNg26VXXwL9x8DDeQ/QtQwRB13A+kBlUH2EjrIdUneruNwfoTyGoGVXGVhDidTrfpA== X-Received: by 2002:a62:1ad6:: with SMTP id a205mr10752350pfa.64.1573206953530; Fri, 08 Nov 2019 01:55:53 -0800 (PST) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.82]) by smtp.gmail.com with ESMTPSA id v14sm5019009pfe.94.2019.11.08.01.55.48 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 08 Nov 2019 01:55:52 -0800 (PST) From: Baolin Wang To: rui.zhang@intel.com, edubezval@gmail.com, daniel.lezcano@linaro.org, amit.kucheria@verdurent.com, robh+dt@kernel.org, mark.rutland@arm.com Cc: orsonzhai@gmail.com, baolin.wang@linaro.org, baolin.wang7@gmail.com, freeman.liu@unisoc.com, zhang.lyra@gmail.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] thermal: sprd: Add Spreadtrum thermal driver support Date: Fri, 8 Nov 2019 17:54:31 +0800 Message-Id: <556e460ca8df5abfb034e9908fe41424d6b867f8.1573206815.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <0a6b113010ad772a633b9cfeeb280dc41f17b951.1573206815.git.baolin.wang@linaro.org> References: <0a6b113010ad772a633b9cfeeb280dc41f17b951.1573206815.git.baolin.wang@linaro.org> In-Reply-To: <0a6b113010ad772a633b9cfeeb280dc41f17b951.1573206815.git.baolin.wang@linaro.org> References: <0a6b113010ad772a633b9cfeeb280dc41f17b951.1573206815.git.baolin.wang@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Freeman Liu This patch adds the support for Spreadtrum thermal sensor controller, which can support maximum 8 sensors. Signed-off-by: Freeman Liu Signed-off-by: Baolin Wang --- drivers/thermal/Kconfig | 7 + drivers/thermal/Makefile | 1 + drivers/thermal/sprd_thermal.c | 548 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 556 insertions(+) create mode 100644 drivers/thermal/sprd_thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 001a21a..47e1fb3 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -417,4 +417,11 @@ config UNIPHIER_THERMAL Enable this to plug in UniPhier on-chip PVT thermal driver into the thermal framework. The driver supports CPU thermal zone temperature reporting and a couple of trip points. + +config SPRD_THERMAL + tristate "Temperature sensor on Spreadtrum SoCs" + depends on ARCH_SPRD || COMPILE_TEST + help + Support for the Spreadtrum thermal sensor driver in the Linux thermal + framework. endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 74a37c7..ef4c032 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -54,3 +54,4 @@ obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o obj-$(CONFIG_GENERIC_ADC_THERMAL) += thermal-generic-adc.o obj-$(CONFIG_ZX2967_THERMAL) += zx2967_thermal.o obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o +obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o diff --git a/drivers/thermal/sprd_thermal.c b/drivers/thermal/sprd_thermal.c new file mode 100644 index 0000000..d9b6074 --- /dev/null +++ b/drivers/thermal/sprd_thermal.c @@ -0,0 +1,548 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 Spreadtrum Communications Inc. + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SPRD_THM_CTL 0x0 +#define SPRD_THM_INT_EN 0x4 +#define SPRD_THM_INT_STS 0x8 +#define SPRD_THM_INT_RAW_STS 0xc +#define SPRD_THM_DET_PERIOD 0x10 +#define SPRD_THM_INT_CLR 0x14 +#define SPRD_THM_INT_CLR_ST 0x18 +#define SPRD_THM_MON_PERIOD 0x4c +#define SPRD_THM_MON_CTL 0x50 +#define SPRD_THM_INTERNAL_STS1 0x54 +#define SPRD_THM_RAW_READ_MSK 0x3ff + +#define SPRD_THM_OFFSET(id) ((id) * 0x4) +#define SPRD_THM_TEMP(id) (SPRD_THM_OFFSET(id) + 0x5c) +#define SPRD_THM_THRES(id) (SPRD_THM_OFFSET(id) + 0x2c) + +#define SPRD_THM_SEN(id) BIT((id) + 2) +#define SPRD_THM_SEN_OVERHEAT_EN(id) BIT((id) + 8) +#define SPRD_THM_SEN_OVERHEAT_ALARM_EN(id) BIT((id) + 0) + +/* bits definitions for register THM_CTL */ +#define SPRD_THM_SET_RDY_ST BIT(13) +#define SPRD_THM_SET_RDY BIT(12) +#define SPRD_THM_MON_EN BIT(1) +#define SPRD_THM_EN BIT(0) + +/* bits definitions for register THM_INT_CTL */ +#define SPRD_THM_BIT_INT_EN BIT(26) +#define SPRD_THM_OVERHEAT_EN BIT(25) +#define SPRD_THM_OTP_TRIP_SHIFT 10 + +/* bits definitions for register SPRD_THM_INTERNAL_STS1 */ +#define SPRD_THM_TEMPER_RDY BIT(0) + +#define SPRD_THM_DET_PERIOD_DATA 0x800 +#define SPRD_THM_DET_PERIOD_MASK GENMASK(19, 0) +#define SPRD_THM_MON_MODE 0x7 +#define SPRD_THM_MON_MODE_MASK GENMASK(3, 0) +#define SPRD_THM_MON_PERIOD_DATA 0x10 +#define SPRD_THM_MON_PERIOD_MASK GENMASK(15, 0) +#define SPRD_THM_THRES_MASK GENMASK(19, 0) +#define SPRD_THM_INT_CLR_MASK GENMASK(24, 0) + +/* thermal sensor calibration parameters */ +#define SPRD_THM_TEMP_LOW -40000 +#define SPRD_THM_TEMP_HIGH 120000 +#define SPRD_THM_OTP_TEMP 120000 +#define SPRD_THM_HOT_TEMP 75000 +#define SPRD_THM_RAW_DATA_LOW 0 +#define SPRD_THM_RAW_DATA_HIGH 1000 +#define SPRD_THM_SEN_NUM 8 +#define SPRD_THM_DT_OFFSET 24 +#define SPRD_THM_RATION_OFFSET 17 +#define SPRD_THM_RATION_SIGN 16 + +#define SPRD_THM_RDYST_POLLING_TIME 10 +#define SPRD_THM_RDYST_TIMEOUT 700 +#define SPRD_THM_TEMP_READY_POLL_TIME 10000 +#define SPRD_THM_TEMP_READY_TIMEOUT 600000 +#define SPRD_THM_MAX_SENSOR 8 + +struct sprd_thermal_sensor { + struct thermal_zone_device *thmzone_dev; + struct sprd_thermal_data *data; + struct device *dev; + bool ready; + int cal_slope; + int cal_offset; + int last_temp; + int id; +}; + +struct sprd_thermal_data { + const struct sprd_thm_variant_data *var_data; + struct sprd_thermal_sensor *sensor[SPRD_THM_MAX_SENSOR]; + struct clk *clk; + void __iomem *base; + u32 ratio_off; + u32 ratio_sign; + int nr_sensors; +}; + +/* + * The conversion between ADC and temperature is based on linear relationship, + * and use idea_k to specify the slope and ideal_b to specify the offset. + * + * Since different Spreadtrum SoCs have different ideal_k and ideal_b, + * we should save ideal_k and ideal_b in the device data structure. + */ +struct sprd_thm_variant_data { + u32 ideal_k; + u32 ideal_b; +}; + +static const struct sprd_thm_variant_data ums512_data = { + .ideal_k = 262, + .ideal_b = 66400, +}; + +static inline void sprd_thm_update_bits(void __iomem *reg, u32 mask, u32 val) +{ + u32 tmp, orig; + + orig = readl(reg); + tmp = orig & ~mask; + tmp |= val & mask; + writel(tmp, reg); +} + +static int sprd_thm_cal_read(struct device_node *np, const char *cell_id, + u32 *val) +{ + struct nvmem_cell *cell; + void *buf; + size_t len; + + cell = of_nvmem_cell_get(np, cell_id); + if (IS_ERR(cell)) + return PTR_ERR(cell); + + buf = nvmem_cell_read(cell, &len); + nvmem_cell_put(cell); + if (IS_ERR(buf)) + return PTR_ERR(buf); + + memcpy(val, buf, min(len, sizeof(u32))); + + kfree(buf); + return 0; +} + +static int sprd_thm_senor_calibration(struct device_node *np, + struct sprd_thermal_data *thm, + struct sprd_thermal_sensor *sen) +{ + int ret; + /* + * According to thermal datasheet, the default calibration offset is 64, + * and the default ratio is 1000. + */ + int dt_offset = 64, ratio = 1000; + + ret = sprd_thm_cal_read(np, "sen_delta_cal", &dt_offset); + if (ret) + return ret; + + if (thm->ratio_sign == 1) + ratio = 1000 - thm->ratio_off; + else + ratio = 1000 + thm->ratio_off; + + /* + * According to the ideal slope K and ideal offset B, combined with + * calibration value of thermal from efuse, then calibrate the real + * slope k and offset b: + * k_cal = (k * ratio) / 1000. + * b_cal = b + (dt_offset - 64) * 500. + */ + sen->cal_slope = (thm->var_data->ideal_k * ratio) / 1000; + sen->cal_offset = thm->var_data->ideal_b + (dt_offset - 128) * 250; + + return 0; +} + +static int sprd_thm_rawdata_to_temp(struct sprd_thermal_sensor *sen, + u32 rawdata) +{ + if (rawdata < SPRD_THM_RAW_DATA_LOW) + rawdata = SPRD_THM_RAW_DATA_LOW; + else if (rawdata > SPRD_THM_RAW_DATA_HIGH) + rawdata = SPRD_THM_RAW_DATA_HIGH; + + /* + * According to the thermal datasheet, the formula of converting + * adc value to the temperature value should be: + * T_final = k_cal * x - b_cal. + */ + return sen->cal_slope * rawdata - sen->cal_offset; +} + +static int sprd_thm_temp_to_rawdata(int temp, struct sprd_thermal_sensor *sen) +{ + u32 val; + + if (temp < SPRD_THM_TEMP_LOW) + temp = SPRD_THM_TEMP_LOW; + else if (temp > SPRD_THM_TEMP_HIGH) + temp = SPRD_THM_TEMP_HIGH; + + /* + * According to the thermal datasheet, the formula of converting + * adc value to the temperature value should be: + * T_final = k_cal * x - b_cal. + */ + val = (temp + sen->cal_offset) / sen->cal_slope; + + return val >= SPRD_THM_RAW_DATA_HIGH ? (SPRD_THM_RAW_DATA_HIGH - 1) : val; +} + +static int sprd_thm_read_temp(void *devdata, int *temp) +{ + struct sprd_thermal_sensor *sen = devdata; + int sensor_temp; + u32 data; + + data = readl(sen->data->base + SPRD_THM_TEMP(sen->id)) & + SPRD_THM_RAW_READ_MSK; + + if (sen->ready) { + sensor_temp = sprd_thm_rawdata_to_temp(sen, data); + sen->last_temp = sensor_temp; + *temp = sensor_temp; + } else { + /* + * If the sensor is not ready, then just return last + * temperature value. + */ + *temp = sen->last_temp; + } + + return 0; +} + +static const struct thermal_zone_of_device_ops sprd_thm_ops = { + .get_temp = sprd_thm_read_temp, +}; + +static int sprd_thm_poll_ready_status(struct sprd_thermal_data *thm) +{ + u32 val; + int ret; + + /* + * Wait for thermal ready status before configuring thermal parameters. + */ + ret = readl_poll_timeout(thm->base + SPRD_THM_CTL, val, + !(val & SPRD_THM_SET_RDY_ST), + SPRD_THM_RDYST_POLLING_TIME, + SPRD_THM_RDYST_TIMEOUT); + if (ret) + return ret; + + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, SPRD_THM_MON_EN, + SPRD_THM_MON_EN); + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, SPRD_THM_SET_RDY, + SPRD_THM_SET_RDY); + return 0; +} + +static int sprd_thm_wait_temp_ready(struct sprd_thermal_data *thm) +{ + u32 val; + + /* Wait for first temperature data ready before reading temperature */ + return readl_poll_timeout(thm->base + SPRD_THM_INTERNAL_STS1, val, + !(val & SPRD_THM_TEMPER_RDY), + SPRD_THM_TEMP_READY_POLL_TIME, + SPRD_THM_TEMP_READY_TIMEOUT); +} + +static int sprd_thm_set_ready(struct sprd_thermal_data *thm) +{ + int ret; + + ret = sprd_thm_poll_ready_status(thm); + if (ret) + return ret; + + /* + * Clear interrupt status, enable thermal interrupt and enable thermal. + */ + writel(SPRD_THM_INT_CLR_MASK, thm->base + SPRD_THM_INT_CLR); + sprd_thm_update_bits(thm->base + SPRD_THM_INT_EN, + SPRD_THM_BIT_INT_EN, SPRD_THM_BIT_INT_EN); + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, + SPRD_THM_EN, SPRD_THM_EN); + return 0; +} + +static void sprd_thm_sensor_init(struct sprd_thermal_data *thm, + struct sprd_thermal_sensor *sen) +{ + u32 otp_rawdata, hot_rawdata; + + otp_rawdata = sprd_thm_temp_to_rawdata(SPRD_THM_OTP_TEMP, sen); + hot_rawdata = sprd_thm_temp_to_rawdata(SPRD_THM_HOT_TEMP, sen); + + /* Enable the sensor' overheat temperature protection interrupt */ + sprd_thm_update_bits(thm->base + SPRD_THM_INT_EN, + SPRD_THM_SEN_OVERHEAT_ALARM_EN(sen->id), + SPRD_THM_SEN_OVERHEAT_ALARM_EN(sen->id)); + + /* Set the sensor' overheat and hot threshold temperature */ + sprd_thm_update_bits(thm->base + SPRD_THM_THRES(sen->id), + SPRD_THM_THRES_MASK, + (otp_rawdata << SPRD_THM_OTP_TRIP_SHIFT) | + hot_rawdata); + + /* Enable the corresponding sensor */ + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, SPRD_THM_SEN(sen->id), + SPRD_THM_SEN(sen->id)); +} + +static void sprd_thm_para_config(struct sprd_thermal_data *thm) +{ + /* Set the period of two valid temperature detection action */ + sprd_thm_update_bits(thm->base + SPRD_THM_DET_PERIOD, + SPRD_THM_DET_PERIOD_MASK, SPRD_THM_DET_PERIOD); + + /* Set the sensors' monitor mode */ + sprd_thm_update_bits(thm->base + SPRD_THM_MON_CTL, + SPRD_THM_MON_MODE_MASK, SPRD_THM_MON_MODE); + + /* Set the sensors' monitor period */ + sprd_thm_update_bits(thm->base + SPRD_THM_MON_PERIOD, + SPRD_THM_MON_PERIOD_MASK, SPRD_THM_MON_PERIOD); +} + +static int sprd_thm_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device_node *sen_child; + struct sprd_thermal_data *thm; + struct sprd_thermal_sensor *sen; + const struct sprd_thm_variant_data *pdata; + int ret, i; + + pdata = of_device_get_match_data(&pdev->dev); + if (!pdata) { + dev_err(&pdev->dev, "No matching driver data found\n"); + return -EINVAL; + } + + thm = devm_kzalloc(&pdev->dev, sizeof(*thm), GFP_KERNEL); + if (!thm) + return -ENOMEM; + + thm->var_data = pdata; + thm->base = devm_platform_ioremap_resource(pdev, 0); + if (!thm->base) + return -ENOMEM; + + thm->nr_sensors = of_get_child_count(np); + if (thm->nr_sensors == 0 || thm->nr_sensors > SPRD_THM_MAX_SENSOR) { + dev_err(&pdev->dev, "incorrect sensor count\n"); + return -EINVAL; + } + + thm->clk = devm_clk_get(&pdev->dev, "enable"); + if (IS_ERR(thm->clk)) { + dev_err(&pdev->dev, "failed to get enable clock\n"); + return PTR_ERR(thm->clk); + } + + ret = clk_prepare_enable(thm->clk); + if (ret) + return ret; + + sprd_thm_para_config(thm); + + ret = sprd_thm_cal_read(np, "thm_sign_cal", &thm->ratio_sign); + if (ret) + goto disable_clk; + + ret = sprd_thm_cal_read(np, "thm_ratio_cal", &thm->ratio_off); + if (ret) + goto disable_clk; + + for_each_child_of_node(np, sen_child) { + sen = devm_kzalloc(&pdev->dev, sizeof(*sen), GFP_KERNEL); + if (!sen) { + ret = -ENOMEM; + goto disable_clk; + } + + sen->ready = false; + sen->data = thm; + sen->dev = &pdev->dev; + + ret = of_property_read_u32(sen_child, "reg", &sen->id); + if (ret) { + dev_err(&pdev->dev, "get sensor reg failed"); + goto disable_clk; + } + + ret = sprd_thm_senor_calibration(sen_child, thm, sen); + if (ret) { + dev_err(&pdev->dev, "efuse cal analysis failed"); + goto disable_clk; + } + + sprd_thm_sensor_init(thm, sen); + + sen->thmzone_dev = + devm_thermal_zone_of_sensor_register(sen->dev, sen->id, + sen, &sprd_thm_ops); + if (IS_ERR(sen->thmzone_dev)) { + dev_err(&pdev->dev, "register thermal zone failed %d\n", + sen->id); + ret = PTR_ERR(sen->thmzone_dev); + goto disable_clk; + } + + thm->sensor[sen->id] = sen; + } + + ret = sprd_thm_set_ready(thm); + if (ret) + goto disable_clk; + + ret = sprd_thm_wait_temp_ready(thm); + if (ret) + goto disable_clk; + + for (i = 0; i < thm->nr_sensors; i++) + thm->sensor[i]->ready = true; + + platform_set_drvdata(pdev, thm); + return 0; + +disable_clk: + clk_disable_unprepare(thm->clk); + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static void sprd_thm_hw_suspend(struct sprd_thermal_data *thm) +{ + int i; + + for (i = 0; i < thm->nr_sensors; i++) { + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, + SPRD_THM_SEN(thm->sensor[i]->id), 0); + } + + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, + SPRD_THM_EN, 0x0); +} + +static int sprd_thm_suspend(struct device *dev) +{ + struct sprd_thermal_data *thm = dev_get_drvdata(dev); + int i; + + for (i = 0; i < thm->nr_sensors; i++) + thm->sensor[i]->ready = false; + + sprd_thm_hw_suspend(thm); + clk_disable_unprepare(thm->clk); + + return 0; +} + +static int sprd_thm_hw_resume(struct sprd_thermal_data *thm) +{ + int ret, i; + + for (i = 0; i < thm->nr_sensors; i++) { + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, + SPRD_THM_SEN(thm->sensor[i]->id), + SPRD_THM_SEN(thm->sensor[i]->id)); + } + + ret = sprd_thm_poll_ready_status(thm); + if (ret) + return ret; + + writel(SPRD_THM_INT_CLR_MASK, thm->base + SPRD_THM_INT_CLR); + sprd_thm_update_bits(thm->base + SPRD_THM_CTL, + SPRD_THM_EN, SPRD_THM_EN); + return sprd_thm_wait_temp_ready(thm); +} + +static int sprd_thm_resume(struct device *dev) +{ + struct sprd_thermal_data *thm = dev_get_drvdata(dev); + int ret, i; + + ret = clk_prepare_enable(thm->clk); + if (ret) + return ret; + + ret = sprd_thm_hw_resume(thm); + if (ret) + goto disable_clk; + + for (i = 0; i < thm->nr_sensors; i++) + thm->sensor[i]->ready = true; + + return 0; + +disable_clk: + clk_disable_unprepare(thm->clk); + return ret; +} +#endif + +static int sprd_thm_remove(struct platform_device *pdev) +{ + struct sprd_thermal_data *thm = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < thm->nr_sensors; i++) { + devm_thermal_zone_of_sensor_unregister(&pdev->dev, + thm->sensor[i]->thmzone_dev); + } + + clk_disable_unprepare(thm->clk); + return 0; +} + +static const struct of_device_id sprd_thermal_of_match[] = { + { .compatible = "sprd,ums512-thermal", .data = &ums512_data }, + { }, +}; + +static const struct dev_pm_ops sprd_thermal_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(sprd_thm_suspend, sprd_thm_resume) +}; + +static struct platform_driver sprd_thermal_driver = { + .probe = sprd_thm_probe, + .remove = sprd_thm_remove, + .driver = { + .name = "sprd-thermal", + .pm = &sprd_thermal_pm_ops, + .of_match_table = sprd_thermal_of_match, + }, +}; + +module_platform_driver(sprd_thermal_driver); + +MODULE_AUTHOR("Freeman Liu "); +MODULE_DESCRIPTION("Spreadtrum thermal driver"); +MODULE_LICENSE("GPL v2");