From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 95472C468BD for ; Fri, 7 Jun 2019 13:53:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E7372146F for ; Fri, 7 Jun 2019 13:53:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EgbjpWvA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728211AbfFGNxH (ORCPT ); Fri, 7 Jun 2019 09:53:07 -0400 Received: from mail-it1-f196.google.com ([209.85.166.196]:52040 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727915AbfFGNxH (ORCPT ); Fri, 7 Jun 2019 09:53:07 -0400 Received: by mail-it1-f196.google.com with SMTP id m3so2807736itl.1; Fri, 07 Jun 2019 06:53:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=9O3vJ6UFNZgJdpurkZJ1zf0TI7rxpOSfZyofdAeA3ZA=; b=EgbjpWvAYhYXcfOBT3PihpNeG3+zydATGZtm+zKjWl0VVPMQwTQl8tG+ptB12j/oie 9kGPKwh45YwmBmQ2Kg7Pu5j/CQr7IxGLQQZFJym+ixrcFPKPh7EGOW1TK7qxITprosHy wb+GzAHNXnH7E96wcvcL9Iu/4kmhMD8YjE9cpqm5/eNZ741luf0/EVnul0yQLOv/t4LS vuBGrpi5GCNXP7Kw/Nd49wqTSWb3URTXFcgK9+qfxMZBo1gBWpSHc3swHxE1Jj/ypdV3 VycbXBCZJp6M1dtb7KPb/vI0K2WyBQuluato15UdaVDblHTocyOCDKGixkUcu2r+LvI3 mNnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=9O3vJ6UFNZgJdpurkZJ1zf0TI7rxpOSfZyofdAeA3ZA=; b=UhmJ8a0VBZ1xJEyW8wA65XMACcTnLytu5HHvVYruSXyIiBOGJbbNN7s7JeGJUYjtxF aNSHdSX59yCExSViIJAP4o93ixydCfq8c8XsrQWtRTFgizcUkh6tlHv33vevuztwGbXj 5RtgXfFDfbSH51b/21DLh2+8ZlxaPLFBO/pNW0yXCC5kT+VhKRDmzWQ99yDynBols/kU aZsEX+JHg5EOJZv4MGYWimcThA7vdBUtx1LtSlQADO2M3KN9U7W0lGsMUPnqmnlNCikC 8M41cFJs4LEUAWJMRx8cYJr9Tuqatt4DDHBwjUQKLb8U+mICkk74hqMjhNVsu7NlzlV3 m86Q== X-Gm-Message-State: APjAAAXE3D7tAivN5H29GyQs3GoeVJHiSAxj/cKfj4cpUwBJraeNdOap VzS3RLheaItdCsM9HeiUva+XlZDzAbFCQf21uWs= X-Google-Smtp-Source: APXvYqwi1A102ejKg4N8aXDBe7mxMxKCUX0ZtIeJU/DizGEH7wQxBMvamB2rUFyBed/qXV0tqAcv5vNYnRtU49WAlzY= X-Received: by 2002:a24:ee08:: with SMTP id b8mr4490939iti.174.1559915585720; Fri, 07 Jun 2019 06:53:05 -0700 (PDT) MIME-Version: 1.0 References: <20190525181329.18657-1-tiny.windzz@gmail.com> <20190525181329.18657-2-tiny.windzz@gmail.com> <20190527142544.skblqfcz5fqfzxgl@core.my.home> In-Reply-To: From: Frank Lee Date: Fri, 7 Jun 2019 21:52:54 +0800 Message-ID: Subject: Re: [PATCH v3 1/3] thermal: sun8i: add thermal driver for h6 To: Yangtao Li , rui.zhang@intel.com, Eduardo Valentin , Daniel Lezcano , robh+dt@kernel.org, Mark Rutland , Maxime Ripard , Chen-Yu Tsai , David Miller , Mauro Carvalho Chehab , Greg Kroah-Hartman , Linus Walleij , Nicolas Ferre , paulmck@linux.ibm.com, devicetree@vger.kernel.org, Linux Kernel Mailing List , Linux ARM , Linux PM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Fri, Jun 7, 2019 at 9:50 PM Frank Lee wrote: > > HI Ond=C5=99ej, > > > On Mon, May 27, 2019 at 10:25 PM Ond=C5=99ej Jirman w= rote: > > > > Hi Yangtao, > > > > On Sat, May 25, 2019 at 02:13:27PM -0400, Yangtao Li wrote: > > > This patch adds the support for allwinner thermal sensor, within > > > allwinner SoC. It will register sensors for thermal framework > > > and use device tree to bind cooling device. > > > > > > Signed-off-by: Yangtao Li > > > --- > > > MAINTAINERS | 7 + > > > drivers/thermal/Kconfig | 14 + > > > drivers/thermal/Makefile | 1 + > > > drivers/thermal/sun8i_thermal.c | 437 ++++++++++++++++++++++++++++++= ++ > > > 4 files changed, 459 insertions(+) > > > create mode 100644 drivers/thermal/sun8i_thermal.c > > > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > > index 2336dd26ece4..d312f9eecf0d 100644 > > > --- a/MAINTAINERS > > > +++ b/MAINTAINERS > > > @@ -674,6 +674,13 @@ L: linux-crypto@vger.kernel.org > > > S: Maintained > > > F: drivers/crypto/sunxi-ss/ > > > > > > +ALLWINNER THERMAL DRIVER > > > +M: Yangtao Li > > > +L: linux-pm@vger.kernel.org > > > +S: Maintained > > > +F: Documentation/devicetree/bindings/thermal/sun8i-thermal.yaml > > > +F: drivers/thermal/sun8i_thermal.c > > > + > > > ALLWINNER VPU DRIVER > > > M: Maxime Ripard > > > M: Paul Kocialkowski > > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > > > index 9966364a6deb..e5465053d66f 100644 > > > --- a/drivers/thermal/Kconfig > > > +++ b/drivers/thermal/Kconfig > > > @@ -262,6 +262,20 @@ config SPEAR_THERMAL > > > Enable this to plug the SPEAr thermal sensor driver into the = Linux > > > thermal framework. > > > > > > +config SUN8I_THERMAL > > > + tristate "Allwinner sun8i thermal driver" > > > + depends on ARCH_SUNXI || COMPILE_TEST > > > + depends on HAS_IOMEM > > > + depends on NVMEM_SUNXI_SID > > > + depends on OF > > > + depends on RESET_CONTROLLER > > > + help > > > + Support for the sun8i thermal sensor driver into the Linux th= ermal > > > + framework. > > > + > > > + To compile this driver as a module, choose M here: the > > > + module will be called sun8i-thermal. > > > + > > > config ROCKCHIP_THERMAL > > > tristate "Rockchip thermal driver" > > > depends on ARCH_ROCKCHIP || COMPILE_TEST > > > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > > > index 74a37c7f847a..fa6f8b206281 100644 > > > --- a/drivers/thermal/Makefile > > > +++ b/drivers/thermal/Makefile > > > @@ -31,6 +31,7 @@ thermal_sys-$(CONFIG_DEVFREQ_THERMAL) +=3D devfreq_= cooling.o > > > obj-y +=3D broadcom/ > > > obj-$(CONFIG_THERMAL_MMIO) +=3D thermal_mmio.o > > > obj-$(CONFIG_SPEAR_THERMAL) +=3D spear_thermal.o > > > +obj-$(CONFIG_SUN8I_THERMAL) +=3D sun8i_thermal.o > > > obj-$(CONFIG_ROCKCHIP_THERMAL) +=3D rockchip_thermal.o > > > obj-$(CONFIG_RCAR_THERMAL) +=3D rcar_thermal.o > > > obj-$(CONFIG_RCAR_GEN3_THERMAL) +=3D rcar_gen3_thermal.o > > > diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_= thermal.c > > > new file mode 100644 > > > index 000000000000..a9cc2197f4cb > > > --- /dev/null > > > +++ b/drivers/thermal/sun8i_thermal.c > > > @@ -0,0 +1,437 @@ > > > +// SPDX-License-Identifier: GPL-2.0 > > > +/* > > > + * Thermal sensor driver for Allwinner SOC > > > + * Copyright (C) 2019 Yangtao Li > > > + * > > > + * Based on the work of Icenowy Zheng > > > + * Based on the work of Ondrej Jirman > > > + * Based on the work of Josef Gajdusek > > > + */ > > > + > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > +#include > > > + > > > +#define MAX_SENSOR_NUM 4 > > > + > > > +#define FT_TEMP_MASK GENMASK(11, 0) > > > +#define TEMP_CALIB_MASK GENMASK(11, 0) > > > +#define TEMP_TO_REG 672 > > > +#define CALIBRATE_DEFAULT 0x800 > > > + > > > +#define SUN50I_THS_CTRL0 0x00 > > > +#define SUN50I_H6_THS_ENABLE 0x04 > > > +#define SUN50I_H6_THS_PC 0x08 > > > +#define SUN50I_H6_THS_DIC 0x10 > > > +#define SUN50I_H6_THS_DIS 0x20 > > > +#define SUN50I_H6_THS_MFC 0x30 > > > +#define SUN50I_H6_THS_TEMP_CALIB 0xa0 > > > +#define SUN50I_H6_THS_TEMP_DATA 0xc0 > > > + > > > +#define SUN50I_THS_CTRL0_T_ACQ(x) ((GENMASK(15, 0) & (x))= << 16) > > > +#define SUN50I_THS_FILTER_EN BIT(2) > > > +#define SUN50I_THS_FILTER_TYPE(x) (GENMASK(1, 0) & (x)) > > > +#define SUN50I_H6_THS_PC_TEMP_PERIOD(x) ((GENMASK(19, 0= ) & (x)) << 12) > > > +#define SUN50I_H6_THS_DATA_IRQ_STS(x) BIT(x) > > > + > > > +/* millidegree celsius */ > > > +#define SUN50I_H6_FT_DEVIATION 7000 > > > + > > > +struct ths_device; > > > + > > > +struct tsensor { > > > + struct ths_device *tmdev; > > > + struct thermal_zone_device *tzd; > > > + int id; > > > + wait_queue_head_t wait_queue; > > > +}; > > > + > > > +struct ths_thermal_chip { > > > + int sensor_num; > > > + int offset; > > > + int scale; > > > + int ft_deviation; > > > + int temp_calib_base; > > > + int temp_data_base; > > > + int (*calibrate)(struct ths_device *tmdev); > > > + int (*init)(struct ths_device *tmdev); > > > + irqreturn_t (*irq_thread)(int irq, void *data); > > > +}; > > > + > > > +struct ths_device { > > > + const struct ths_thermal_chip *chip; > > > + struct device *dev; > > > + struct regmap *regmap; > > > + struct reset_control *reset; > > > + struct clk *bus_clk; > > > + struct tsensor sensor[MAX_SENSOR_NUM]; > > > + int data_ready; > > > +}; > > > + > > > +/* Temp Unit: millidegree Celsius */ > > > +static int sun8i_ths_reg2temp(struct ths_device *tmdev, > > > + int reg) > > > +{ > > > + return (reg + tmdev->chip->offset) * tmdev->chip->scale; > > > +} > > > + > > > +static int sun8i_ths_get_temp(void *data, int *temp) > > > +{ > > > + struct tsensor *s =3D data; > > > + struct ths_device *tmdev =3D s->tmdev; > > > + int val; > > > + > > > + wait_event(s->wait_queue, tmdev->data_ready & BIT(s->id)); > > > + tmdev->data_ready &=3D ~BIT(s->id); > > > > I've looked at thermal_core.c and it looks like that the proper way to = handle > > this situation is just returning -EAGAIN. > > What we are doing now is to turn it into an interrupt-based program. > Every time we use temperature data, we need to wait until new data is col= lected. > > > > > See update_temperature() function in thermal_core.c. > > > > That will suppress the warning about failure to read thermal zone. Also > > it's much simpler than this wait_queue stuff. No other thermal driver u= ses this > > either. Also get_temp is called under thermal_list_lock mutex and that = would > > block cooling device registrations and god knows what else. > > Since there is no valid temperature data, it cannot be blocked. Since there is no valid temperature data, why can't it be blocked? > > MBR, > Yangtao > > > > > Other than that, and what Maxime said, I don't see any more issues. > > > > thank you, > > o. > > > > > + regmap_read(tmdev->regmap, tmdev->chip->temp_data_base + > > > + 0x4 * s->id, &val); > > > + > > > + *temp =3D sun8i_ths_reg2temp(tmdev, val); > > > + /* > > > + * XX - According to the original sdk, there are some platforms= (rarely) > > > + * that add a fixed offset value after calculating the temperat= ure > > > + * value. We can't simply put it on the formula for calculating= the > > > + * temperature above, because the formula for calculating the > > > + * temperature above is also used when the sensor is calibrated= . If > > > + * do this, the correct calibration formula is hard to know. > > > + */ > > > + if (tmdev->chip->ft_deviation) > > > + *temp +=3D tmdev->chip->ft_deviation; > > > + > > > + return 0; > > > +} > > > + > > > +static const struct thermal_zone_of_device_ops ths_ops =3D { > > > + .get_temp =3D sun8i_ths_get_temp, > > > +}; > > > + > > > +static const struct regmap_config config =3D { > > > + .reg_bits =3D 32, > > > + .val_bits =3D 32, > > > + .reg_stride =3D 4, > > > + .fast_io =3D true, > > > +}; > > > + > > > +static irqreturn_t sun50i_h6_irq_thread(int irq, void *data) > > > +{ > > > + wait_queue_head_t *data_wait; > > > + struct ths_device *tmdev =3D data; > > > + int i, state; > > > + > > > + regmap_read(tmdev->regmap, SUN50I_H6_THS_DIS, &state); > > > + > > > + for (i =3D 0; i < tmdev->chip->sensor_num; i++) { > > > + data_wait =3D &tmdev->sensor[i].wait_queue; > > > + > > > + if (state & SUN50I_H6_THS_DATA_IRQ_STS(i)) { > > > + /* clear data irq pending */ > > > + regmap_write(tmdev->regmap, SUN50I_H6_THS_DIS, > > > + SUN50I_H6_THS_DATA_IRQ_STS(i)); > > > + > > > + tmdev->data_ready |=3D BIT(i); > > > + wake_up(data_wait); > > > + } > > > + } > > > + > > > + return IRQ_HANDLED; > > > +} > > > + > > > +static int sun8i_ths_resource_init(struct ths_device *tmdev) > > > +{ > > > + struct device *dev =3D tmdev->dev; > > > + struct platform_device *pdev =3D to_platform_device(dev); > > > + struct resource *mem; > > > + void __iomem *base; > > > + int ret, irq; > > > + > > > + mem =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); > > > + base =3D devm_ioremap_resource(dev, mem); > > > + if (IS_ERR(base)) > > > + return PTR_ERR(base); > > > + > > > + tmdev->regmap =3D devm_regmap_init_mmio(dev, base, &config); > > > + if (IS_ERR(tmdev->regmap)) > > > + return PTR_ERR(tmdev->regmap); > > > + > > > + tmdev->reset =3D devm_reset_control_get(dev, 0); > > > + if (IS_ERR(tmdev->reset)) > > > + return PTR_ERR(tmdev->reset); > > > + > > > + tmdev->bus_clk =3D devm_clk_get(&pdev->dev, "bus"); > > > + if (IS_ERR(tmdev->bus_clk)) > > > + return PTR_ERR(tmdev->bus_clk); > > > + > > > + irq =3D platform_get_irq(pdev, 0); > > > + if (irq < 0) > > > + return irq; > > > + > > > + ret =3D devm_request_threaded_irq(dev, irq, NULL, > > > + tmdev->chip->irq_thread, > > > + IRQF_ONESHOT, "ths", tmdev); > > > + if (ret) > > > + return ret; > > > + > > > + ret =3D reset_control_deassert(tmdev->reset); > > > + if (ret) > > > + return ret; > > > + > > > + ret =3D clk_prepare_enable(tmdev->bus_clk); > > > + if (ret) > > > + goto assert_reset; > > > + > > > + ret =3D tmdev->chip->calibrate(tmdev); > > > + if (ret) > > > + goto bus_disable; > > > + > > > + return 0; > > > + > > > +bus_disable: > > > + clk_disable_unprepare(tmdev->bus_clk); > > > +assert_reset: > > > + reset_control_assert(tmdev->reset); > > > + > > > + return ret; > > > +} > > > + > > > +static int sun50i_ths_calibrate(struct ths_device *tmdev) > > > +{ > > > + struct nvmem_cell *calcell; > > > + struct device *dev =3D tmdev->dev; > > > + u16 *caldata; > > > + size_t callen; > > > + int ft_temp; > > > + int i, ret =3D 0; > > > + > > > + calcell =3D devm_nvmem_cell_get(dev, "calib"); > > > + if (IS_ERR(calcell)) { > > > + if (PTR_ERR(calcell) =3D=3D -EPROBE_DEFER) > > > + return -EPROBE_DEFER; > > > + /* > > > + * Even if the external calibration data stored in sid = is > > > + * not accessible, the THS hardware can still work, alt= hough > > > + * the data won't be so accurate. > > > + * > > > + * The default value of calibration register is 0x800 f= or > > > + * every sensor, and the calibration value is usually 0= x7xx > > > + * or 0x8xx, so they won't be away from the default val= ue > > > + * for a lot. > > > + * > > > + * So here we do not return error if the calibartion da= ta is > > > + * not available, except the probe needs deferring. > > > + */ > > > + goto out; > > > + } > > > + > > > + caldata =3D nvmem_cell_read(calcell, &callen); > > > + if (IS_ERR(caldata)) { > > > + ret =3D PTR_ERR(caldata); > > > + goto out; > > > + } > > > + > > > + if (!caldata[0] || callen < 2 + 2 * tmdev->chip->sensor_num) { > > > + ret =3D -EINVAL; > > > + goto out_free; > > > + } > > > + > > > + /* > > > + * efuse layout: > > > + * > > > + * 0 11 16 32 > > > + * +-------+-------+-------+ > > > + * |temp| |sensor0|sensor1| > > > + * +-------+-------+-------+ > > > + * > > > + * The calibration data on the H6 is the ambient temperature an= d > > > + * sensor values that are filled during the factory test stage. > > > + * > > > + * The unit of stored FT temperature is 0.1 degreee celusis. > > > + * Through the stored ambient temperature and the data read > > > + * by the sensor, after a certain calculation, the calibration > > > + * value to be compensated can be obtained. > > > + */ > > > + ft_temp =3D caldata[0] & FT_TEMP_MASK; > > > + > > > + for (i =3D 0; i < tmdev->chip->sensor_num; i++) { > > > + int reg =3D (int)caldata[i + 1]; > > > + int sensor_temp =3D sun8i_ths_reg2temp(tmdev, reg); > > > + int delta, cdata, calib_offest; > > > + > > > + /* > > > + * To calculate the calibration value: > > > + * > > > + * X(in Celsius) =3D Ts - ft_temp > > > + * delta =3D X * 10000 / TEMP_TO_REG > > > + * cdata =3D CALIBRATE_DEFAULT - delta > > > + * > > > + * cdata: calibration value > > > + */ > > > + delta =3D (sensor_temp - ft_temp * 100) * 10 / TEMP_TO_= REG; > > > + cdata =3D CALIBRATE_DEFAULT - delta; > > > + if (cdata & ~TEMP_CALIB_MASK) { > > > + /* > > > + * Calibration value more than 12-bit, but cali= bration > > > + * register is 12-bit. In this case, ths hardwa= re can > > > + * still work without calibration, although the= data > > > + * won't be so accurate. > > > + */ > > > + dev_warn(dev, "sensor%d is not calibrated.\n", = i); > > > + > > > + continue; > > > + } > > > + > > > + calib_offest =3D tmdev->chip->temp_calib_base + (i / 2)= * 0x4; > > > + > > > + if (i % 2) { > > > + int val; > > > + > > > + regmap_read(tmdev->regmap, calib_offest, &val); > > > + val =3D (val & TEMP_CALIB_MASK) | (cdata << 16)= ; > > > + regmap_write(tmdev->regmap, calib_offest, val); > > > + } else { > > > + regmap_write(tmdev->regmap, calib_offest, cdata= ); > > > + } > > > + } > > > + > > > +out_free: > > > + kfree(caldata); > > > +out: > > > + return ret; > > > +} > > > + > > > +static int sun8i_ths_register(struct ths_device *tmdev) > > > +{ > > > + struct thermal_zone_device *tzd; > > > + int i; > > > + > > > + for (i =3D 0; i < tmdev->chip->sensor_num; i++) { > > > + tmdev->sensor[i].tmdev =3D tmdev; > > > + tmdev->sensor[i].id =3D i; > > > + tmdev->sensor[i].tzd =3D > > > + devm_thermal_zone_of_sensor_register(tmdev->dev= , > > > + i, > > > + &tmdev->se= nsor[i], > > > + &ths_ops); > > > + if (IS_ERR(tmdev->sensor[i].tzd)) > > > + return PTR_ERR(tzd); > > > + } > > > + > > > + return 0; > > > +} > > > + > > > +static int sun8i_ths_probe(struct platform_device *pdev) > > > +{ > > > + struct ths_device *tmdev; > > > + struct device *dev =3D &pdev->dev; > > > + int i, ret; > > > + > > > + tmdev =3D devm_kzalloc(dev, sizeof(*tmdev), GFP_KERNEL); > > > + if (!tmdev) > > > + return -ENOMEM; > > > + > > > + tmdev->dev =3D dev; > > > + tmdev->chip =3D of_device_get_match_data(&pdev->dev); > > > + if (!tmdev->chip) > > > + return -EINVAL; > > > + > > > + /* > > > + * Initialize wait_queue in advance, to avoid calling wake_up > > > + * before ths is registered in isr. > > > + */ > > > + for (i =3D 0; i < tmdev->chip->sensor_num; i++) > > > + init_waitqueue_head(&tmdev->sensor[i].wait_queue); > > > + > > > + platform_set_drvdata(pdev, tmdev); > > > + > > > + ret =3D sun8i_ths_resource_init(tmdev); > > > + if (ret) > > > + return ret; > > > + > > > + ret =3D tmdev->chip->init(tmdev); > > > + if (ret) > > > + return ret; > > > + > > > + ret =3D sun8i_ths_register(tmdev); > > > + if (ret) > > > + return ret; > > > + > > > + return ret; > > > +} > > > + > > > +static int sun8i_ths_remove(struct platform_device *pdev) > > > +{ > > > + struct ths_device *tmdev =3D platform_get_drvdata(pdev); > > > + > > > + clk_disable_unprepare(tmdev->bus_clk); > > > + reset_control_assert(tmdev->reset); > > > + > > > + return 0; > > > +} > > > + > > > +static int sun50i_thermal_init(struct ths_device *tmdev) > > > +{ > > > + int val; > > > + > > > + /* > > > + * clkin =3D 24MHz > > > + * T acquire =3D clkin / (x + 1) > > > + * =3D 20us > > > + */ > > > + regmap_write(tmdev->regmap, SUN50I_THS_CTRL0, > > > + SUN50I_THS_CTRL0_T_ACQ(479)); > > > + /* average over 4 samples */ > > > + regmap_write(tmdev->regmap, SUN50I_H6_THS_MFC, > > > + SUN50I_THS_FILTER_EN | > > > + SUN50I_THS_FILTER_TYPE(1)); > > > + /* period =3D (x + 1) * 4096 / clkin; ~10ms */ > > > + regmap_write(tmdev->regmap, SUN50I_H6_THS_PC, > > > + SUN50I_H6_THS_PC_TEMP_PERIOD(58)); > > > + /* enable sensor */ > > > + val =3D GENMASK(tmdev->chip->sensor_num - 1, 0); > > > + regmap_write(tmdev->regmap, SUN50I_H6_THS_ENABLE, val); > > > + /* thermal data interrupt enable */ > > > + val =3D GENMASK(tmdev->chip->sensor_num - 1, 0); > > > + regmap_write(tmdev->regmap, SUN50I_H6_THS_DIC, val); > > > + > > > + return 0; > > > +} > > > + > > > +static const struct ths_thermal_chip sun50i_h6_ths =3D { > > > + .sensor_num =3D 2, > > > + .offset =3D -2794, > > > + .scale =3D -67, > > > + .ft_deviation =3D SUN50I_H6_FT_DEVIATION, > > > + .temp_calib_base =3D SUN50I_H6_THS_TEMP_CALIB, > > > + .temp_data_base =3D SUN50I_H6_THS_TEMP_DATA, > > > + .calibrate =3D sun50i_ths_calibrate, > > > + .init =3D sun50i_thermal_init, > > > + .irq_thread =3D sun50i_h6_irq_thread, > > > +}; > > > + > > > +static const struct of_device_id of_ths_match[] =3D { > > > + { .compatible =3D "allwinner,sun50i-h6-ths", .data =3D &sun50i_= h6_ths }, > > > + { /* sentinel */ }, > > > +}; > > > +MODULE_DEVICE_TABLE(of, of_ths_match); > > > + > > > +static struct platform_driver ths_driver =3D { > > > + .probe =3D sun8i_ths_probe, > > > + .remove =3D sun8i_ths_remove, > > > + .driver =3D { > > > + .name =3D "sun8i-thermal", > > > + .of_match_table =3D of_ths_match, > > > + }, > > > +}; > > > +module_platform_driver(ths_driver); > > > + > > > +MODULE_DESCRIPTION("Thermal sensor driver for Allwinner SOC"); > > > +MODULE_LICENSE("GPL v2"); > > > -- > > > 2.17.0 > > > > > > > > > _______________________________________________ > > > linux-arm-kernel mailing list > > > linux-arm-kernel@lists.infradead.org > > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel