From patchwork Tue Jan 7 18:15:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 11321571 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 10ACE138D for ; Tue, 7 Jan 2020 18:16:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB406214D8 for ; Tue, 7 Jan 2020 18:16:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="JbSBDGbs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728358AbgAGSQX (ORCPT ); Tue, 7 Jan 2020 13:16:23 -0500 Received: from mout.gmx.net ([212.227.15.18]:58353 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728430AbgAGSQX (ORCPT ); Tue, 7 Jan 2020 13:16:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1578420965; bh=4mbXLn8R9HTqHSqjDYTVnf33y1TLbPgq1QZsQUXuORI=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=JbSBDGbsT0C/YiJLKHHclDX+IekngU601r/NZUXbm7pEwIYsEG9Fpom2kM2knFKu6 P8bgl9yGKGMF3bKRLNYwPzCNgXdBIDyzI8MsZOrBpZG4jgG62ofrIuBWMuCDJ2if7S 9nt5L4RoIxNX7cPNA8tE7jX2d15dzT534YUlWCzQ= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from localhost.localdomain ([37.4.249.154]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M7sDg-1il3eJ1VuE-0053xL; Tue, 07 Jan 2020 19:16:05 +0100 From: Stefan Wahren To: Zhang Rui , Daniel Lezcano , Amit Kucheria , Rob Herring , Mark Rutland , Nicolas Saenz Julienne , Florian Fainelli , Catalin Marinas , Will Deacon Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org, Stefan Wahren Subject: [PATCH V3 2/4] thermal: Add BCM2711 thermal driver Date: Tue, 7 Jan 2020 19:15:55 +0100 Message-Id: <1578420957-32229-3-git-send-email-wahrenst@gmx.net> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578420957-32229-1-git-send-email-wahrenst@gmx.net> References: <1578420957-32229-1-git-send-email-wahrenst@gmx.net> X-Provags-ID: V03:K1:yFvB7JDgtfyjUut8k1Chkrb/ErSVsg3EvQyWqLPXb8cBJL7dcQK dsv56Ee8bmn70zRFQcp+ZxoKnJOLsQX8yr4SSStLpZInOQB1eFljwNlqO1yvOMTchBW9aNV 8K/3K5y1XYvkIucOrqA4mcg/Abn6C2HRj+YX30kIzWXSZJYVPfGO7BlReGxXXeOS3RN/0+v AxjdzIeF7ITk0B2E8IlXg== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:jTzlGkSo9bo=:dlU7pPc0rf9QUy9ZULoDP9 8GSLL1VdjzaySpcK+jGdXJmnrTtTdrwOVCM13Yj+OFiXY9BhB02v3Y1/GACb0zByQF6m5R+HY E9rP1h/ZotZ106drpf22Cq8qEcdAIN5naIaEYooguO0tmeziCzo2zdEeRvJQpiw0XPxJzNMRM 6r/2TRXgeXb53bBysAa4tCjXgXGwqtbF0WKTAsWBjogBF/6lwK2AgGFC8X4mY7XOv8GZOq+EO eCr92WcgDG5MIwJF7G+Q/SWbTCV+S7Fs8D52Iy3YYtdNKYJa8Mq2PmZs+zx2feLAmwfSxGctw EuEMw9cv1bA2tVzuUn7GiFQYGlJpxGvvCrxvU6F99yw9ECI3c3zIOHKmsXPlWMBQo9AuD/0rF P//MLHaS7rzJds2En+JKdP/bAR2XxC/qCtHnF7VIxMkbrXUU69CYWVTAz5gaxFv5CtBY5kqmi /AkDqAJimergmP6IIVtmEpgO5aE2KcbFFWtqt8e+OshhR/JDJ6JP8+kZUnbV9e0nY2cUJQqeT n30n/BPVfHDvMlXeHpI//Eo90SBCEVY9BRd90Q/9tmyRckXcLt+mK9USdZAkyrq7X+eXNlB2b QPHkn7XPbEso/0K2GzZCEO+kh5IKoYf4o53VM++6q7SDY48oU7MGG29P36RlK40W4wxgYcnbQ G6ofOpVasFvQlsfoWZAy3tMP3h7pzSXTMzfb+oBl+20O/5R32GpSWt/jO/Rfhyk+Ho+MGiQwA TqHZK+xG6BWesd9jIKv+A0n/NnxbHfylDpSRa0x4Al27WH1GQcN70HE+B91a58+3NmNd8cl1u nR++5B6h+UhxHjwY3mJFn6JaJE9tzHZYUcYYH6JeUq03cFXZC9Fxdns96ofekPi24KiO9T49q byceV+B8w4shzosvTwbuExqTP6JvIQU0VGVNzFhWlFvoMardYHn0PWKlIy16TPVaRXEL7yl2U +TRzGy2pXi4g1TkFMGGmRU17UYWsREIKw3+RqOSuq8riGSWZrUgVbk2wJLp/0kS4pLMUzaF/a QMemNPTBJfdX15J9IiNHnOMDGmEdpRucbFs9HYRn4HhWDMl1TskP5nyUiG8p+7ET3PLjS+r4K IFzT7g2tghwbdcDkMOjwK1CFXVblw2fUa5gjZoLCAb+psUornL0pyskLONpUQDgX+FONMdu5C gXIa+nu2CgDmi+mxoDIx4hSim5yfx1eGeryexRr5UiX4wdT0jXDx3nyfK+z9DTgBbIwY0D0qM gN5jbjyZRfDrlBl1cMJHAWyDEdL42xvNhWkeV0Q== Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This adds the thermal sensor driver for the Broadcom BCM2711 SoC, which is placed on the Raspberry Pi 4. The driver only provides SoC temperature reading so far. Signed-off-by: Stefan Wahren Reviewed-by: Florian Fainelli Reviewed-by: Nicolas Saenz Julienne Tested-by: Nicolas Saenz Julienne --- drivers/thermal/broadcom/Kconfig | 7 ++ drivers/thermal/broadcom/Makefile | 1 + drivers/thermal/broadcom/bcm2711_thermal.c | 129 +++++++++++++++++++++++++++++ 3 files changed, 137 insertions(+) create mode 100644 drivers/thermal/broadcom/bcm2711_thermal.c -- 2.7.4 diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig index cf43e15..061f1db 100644 --- a/drivers/thermal/broadcom/Kconfig +++ b/drivers/thermal/broadcom/Kconfig @@ -1,4 +1,11 @@ # SPDX-License-Identifier: GPL-2.0-only +config BCM2711_THERMAL + tristate "Broadcom AVS RO thermal sensor driver" + depends on ARCH_BCM2835 || COMPILE_TEST + depends on THERMAL_OF && MFD_SYSCON + help + Support for thermal sensors on Broadcom BCM2711 SoCs. + config BCM2835_THERMAL tristate "Thermal sensors on bcm2835 SoC" depends on ARCH_BCM2835 || COMPILE_TEST diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile index 490ab1f..c917b24 100644 --- a/drivers/thermal/broadcom/Makefile +++ b/drivers/thermal/broadcom/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_BCM2711_THERMAL) += bcm2711_thermal.o obj-$(CONFIG_BCM2835_THERMAL) += bcm2835_thermal.o obj-$(CONFIG_BRCMSTB_THERMAL) += brcmstb_thermal.o obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o diff --git a/drivers/thermal/broadcom/bcm2711_thermal.c b/drivers/thermal/broadcom/bcm2711_thermal.c new file mode 100644 index 0000000..b1d3c4d --- /dev/null +++ b/drivers/thermal/broadcom/bcm2711_thermal.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Broadcom AVS RO thermal sensor driver + * + * based on brcmstb_thermal + * + * Copyright (C) 2020 Stefan Wahren + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../thermal_hwmon.h" + +#define AVS_RO_TEMP_STATUS 0x200 + #define AVS_RO_TEMP_STATUS_valid_msk (BIT(16) | BIT(10)) + #define AVS_RO_TEMP_STATUS_data_msk GENMASK(9, 0) + +struct bcm2711_thermal_priv { + struct regmap *regmap; + struct device *dev; + struct thermal_zone_device *thermal; +}; + +static int bcm2711_get_temp(void *data, int *temp) +{ + struct bcm2711_thermal_priv *priv = data; + int slope = thermal_zone_get_slope(priv->thermal); + int offset = thermal_zone_get_offset(priv->thermal); + u32 val; + int ret; + long t; + + ret = regmap_read(priv->regmap, AVS_RO_TEMP_STATUS, &val); + if (ret) + return ret; + + if (!(val & AVS_RO_TEMP_STATUS_valid_msk)) { + dev_err(priv->dev, "reading not valid\n"); + return -EIO; + } + + val &= AVS_RO_TEMP_STATUS_data_msk; + + /* Convert a HW code to a temperature reading (millidegree celsius) */ + t = slope * val + offset; + if (t < 0) + *temp = 0; + else + *temp = t; + + return 0; +} + +static const struct thermal_zone_of_device_ops bcm2711_thermal_of_ops = { + .get_temp = bcm2711_get_temp, +}; + +static const struct of_device_id bcm2711_thermal_id_table[] = { + { .compatible = "brcm,bcm2711-thermal" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm2711_thermal_id_table); + +static int bcm2711_thermal_probe(struct platform_device *pdev) +{ + struct thermal_zone_device *thermal; + struct bcm2711_thermal_priv *priv; + struct device *dev = &pdev->dev; + struct device_node *parent; + struct regmap *regmap; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + /* get regmap from syscon node */ + parent = of_get_parent(dev->of_node); /* parent should be syscon node */ + regmap = syscon_node_to_regmap(parent); + of_node_put(parent); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(dev, "failed to get regmap: %d\n", ret); + return ret; + } + priv->regmap = regmap; + priv->dev = dev; + + thermal = devm_thermal_zone_of_sensor_register(dev, 0, priv, + &bcm2711_thermal_of_ops); + if (IS_ERR(thermal)) { + ret = PTR_ERR(thermal); + dev_err(dev, "could not register sensor: %d\n", ret); + return ret; + } + + priv->thermal = thermal; + + thermal->tzp->no_hwmon = false; + ret = thermal_add_hwmon_sysfs(thermal); + if (ret) + return ret; + + return 0; +} + +static struct platform_driver bcm2711_thermal_driver = { + .probe = bcm2711_thermal_probe, + .driver = { + .name = "bcm2711_thermal", + .of_match_table = bcm2711_thermal_id_table, + }, +}; +module_platform_driver(bcm2711_thermal_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Stefan Wahren"); +MODULE_DESCRIPTION("Broadcom AVS RO thermal sensor driver");