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Message-ID: <20141028003205.GK7594@dtor-ws>
Date: Mon, 27 Oct 2014 17:32:05 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Caesar Wang <caesar.wang@...k-chips.com>
Cc: heiko@...ech.de, rui.zhang@...el.com, edubezval@...il.com,
zyf@...k-chips.com, dianders@...omium.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
cf@...k-chips.com, dbasehore@...omium.org, huangtao@...k-chips.com,
cjf@...k-chips.com, zhengsq@...k-chips.com
Subject: Re: [PATCH v14 1/5] thermal: rockchip: add driver for thermal
Hi Caesar,
On Mon, Oct 27, 2014 at 10:39:44AM +0800, Caesar Wang wrote:
> Thermal is TS-ADC Controller module supports
> user-defined mode and automatic mode.
>
> User-defined mode refers,TSADC all the control signals entirely by
> software writing to register for direct control.
>
> Automaic mode refers to the module automatically poll TSADC output,
> and the results were checked.If you find that the temperature High
> in a period of time,an interrupt is generated to the processor
> down-measures taken;If the temperature over a period of time High,
> the resulting TSHUT gave CRU module,let it reset the entire chip,
> or via GPIO give PMIC.
>
> Signed-off-by: zhaoyifeng <zyf@...k-chips.com>
> Signed-off-by: Caesar Wang <caesar.wang@...k-chips.com>
I think the driver looks really good now, just a couple more comments.
> ---
> drivers/thermal/Kconfig | 9 +
> drivers/thermal/Makefile | 1 +
> drivers/thermal/rockchip_thermal.c | 699 +++++++++++++++++++++++++++++++++++++
> 3 files changed, 709 insertions(+)
> create mode 100644 drivers/thermal/rockchip_thermal.c
>
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index ef5587f..5efcf73 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -133,6 +133,15 @@ config SPEAR_THERMAL
> Enable this to plug the SPEAr thermal sensor driver into the Linux
> thermal framework.
>
> +config ROCKCHIP_THERMAL
> + tristate "Rockchip thermal driver"
> + depends on ARCH_ROCKCHIP
> + help
> + Rockchip thermal driver provides support for Temperature sensor
> + ADC (TS-ADC) found on Rockchip SoCs. It supports one critical
> + trip point. Cpufreq is used as the cooling device and will throttle
> + CPUs when the Temperature crosses the passive trip point.
> +
> config RCAR_THERMAL
> tristate "Renesas R-Car thermal driver"
> depends on ARCH_SHMOBILE || COMPILE_TEST
> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
> index 31e232f..21da0a8 100644
> --- a/drivers/thermal/Makefile
> +++ b/drivers/thermal/Makefile
> @@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o
>
> # platform thermal drivers
> obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
> +obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o
> obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
> obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o
> obj-y += samsung/
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> new file mode 100644
> index 0000000..99ca305
> --- /dev/null
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -0,0 +1,699 @@
> +/*
> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/platform_device.h>
> +#include <linux/thermal.h>
> +
> +/**
> + * If the temperature over a period of time High,
> + * the resulting TSHUT gave CRU module,let it reset the entire chip,
> + * or via GPIO give PMIC.
> + */
> +enum tshut_mode {
> + TSHUT_MODE_CRU = 0,
> + TSHUT_MODE_GPIO,
> +};
> +
> +/**
> + * the system Temperature Sensors tshut(tshut) polarity
> + * the bit 8 is tshut polarity.
> + * 0: low active, 1: high active
> + */
> +enum tshut_polarity {
> + TSHUT_LOW_ACTIVE = 0,
> + TSHUT_HIGH_ACTIVE,
> +};
> +
> +/**
> + * The system has three Temperature Sensors. channel 0 is reserved,
> + * channel 1 is for CPU, and channel 2 is for GPU.
> + */
> +enum sensor_id {
> + SENSOR_CPU = 1,
> + SENSOR_GPU,
> +};
> +
> +struct rockchip_tsadc_chip {
> + long hw_shut_temp;
> + enum tshut_mode tshut_mode;
> + enum tshut_polarity tshut_polarity;
> +
> + /* Chip-wide methods */
> + void (*initialize)(void __iomem *reg, enum tshut_polarity p,
> + unsigned long clk_rate);
> + void (*irq_ack)(void __iomem *reg);
> +
> + /* Per-sensor methods */
> + int (*get_temp)(int chn, void __iomem *reg, long *temp);
> + void (*set_alarm_temp)(int chn, void __iomem *reg, long temp);
> + void (*set_tshut_temp)(int chn, void __iomem *reg, long temp);
> + void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
> + void (*control)(int chn, void __iomem *reg, bool on);
> +};
> +
> +struct rockchip_thermal_sensor {
> + struct rockchip_thermal_data *thermal;
> + struct thermal_zone_device *tzd;
> + enum sensor_id id;
> +};
> +
> +#define NUM_SENSORS 2 /* Ignore unused sensor 0 */
> +
> +struct rockchip_thermal_data {
> + const struct rockchip_tsadc_chip *chip;
> + struct platform_device *pdev;
> +
> + struct rockchip_thermal_sensor sensors[NUM_SENSORS];
> +
> + struct thermal_cooling_device *cdev;
> +
> + struct clk *clk;
> + struct clk *pclk;
> +
> + void __iomem *regs;
> +
> + unsigned long clk_rate;
> +
> + long hw_shut_temp;
> + enum tshut_mode tshut_mode;
> + enum tshut_polarity tshut_polarity;
> +};
> +
> +/* TSADC V2 Sensor info define: */
> +#define TSADCV2_AUTO_CON 0x04
> +#define TSADCV2_INT_EN 0x08
> +#define TSADCV2_INT_PD 0x0c
> +#define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04)
> +#define TSADCV2_COMP_INT(chn) (0x30 + (chn) * 0x04)
> +#define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04)
> +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60
> +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64
> +#define TSADCV2_AUTO_PERIOD 0x68
> +#define TSADCV2_AUTO_PERIOD_HT 0x6c
> +
> +#define TSADCV2_AUTO_EN BIT(0)
> +#define TSADCV2_AUTO_DISABLE ~BIT(0)
> +#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn))
> +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8)
> +#define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8)
> +
> +#define TSADCV2_INT_SRC_EN(chn) BIT(chn)
> +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn))
> +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn))
> +
> +#define TSADCV2_INT_PD_CLEAR ~BIT(8)
> +
> +#define TSADCV2_DATA_MASK 0xfff
> +#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4
> +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4
> +#define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */
> +#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */
> +
> +struct tsadc_table {
> + unsigned long code;
> + long temp;
> +};
> +
> +static const struct tsadc_table v2_code_table[] = {
> + {TSADCV2_DATA_MASK, -40000},
> + {3800, -40000},
> + {3792, -35000},
> + {3783, -30000},
> + {3774, -25000},
> + {3765, -20000},
> + {3756, -15000},
> + {3747, -10000},
> + {3737, -5000},
> + {3728, 0},
> + {3718, 5000},
> + {3708, 10000},
> + {3698, 15000},
> + {3688, 20000},
> + {3678, 25000},
> + {3667, 30000},
> + {3656, 35000},
> + {3645, 40000},
> + {3634, 45000},
> + {3623, 50000},
> + {3611, 55000},
> + {3600, 60000},
> + {3588, 65000},
> + {3575, 70000},
> + {3563, 75000},
> + {3550, 80000},
> + {3537, 85000},
> + {3524, 90000},
> + {3510, 95000},
> + {3496, 100000},
> + {3482, 105000},
> + {3467, 110000},
> + {3452, 115000},
> + {3437, 120000},
> + {3421, 125000},
> + {0, 125000},
> +};
> +
> +static u32 rk_tsadcv2_temp_to_code(long temp)
> +{
> + int high, low, mid;
> +
> + low = 0;
> + high = ARRAY_SIZE(v2_code_table) - 1;
> + mid = (high + low) / 2;
> +
> + if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp)
> + return 0;
> +
> + while (low <= high) {
> + if (temp == v2_code_table[mid].temp)
> + return v2_code_table[mid].code;
> + else if (temp < v2_code_table[mid].temp)
> + high = mid - 1;
> + else
> + low = mid + 1;
> + mid = (low + high) / 2;
> + }
> +
> + return 0;
> +}
> +
> +static long rk_tsadcv2_code_to_temp(u32 code)
> +{
> + int high, low, mid;
> +
> + low = 0;
> + high = ARRAY_SIZE(v2_code_table) - 1;
> + mid = (high + low) / 2;
> +
> + if (code > v2_code_table[low].code || code < v2_code_table[high].code)
> + return 125000; /* No code available, return max temperature */
> +
> + while (low <= high) {
> + if (code >= v2_code_table[mid].code && code <
> + v2_code_table[mid - 1].code)
> + return v2_code_table[mid].temp;
> + else if (code < v2_code_table[mid].code)
> + low = mid + 1;
> + else
> + high = mid - 1;
> + mid = (low + high) / 2;
> + }
> +
> + return 125000;
> +}
> +
> +/**
> + * rk_tsadcv2_initialize - initialize TASDC Controller
> + * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
> + * every two accessing of TSADC in normal operation.
> + * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
> + * every two accessing of TSADC after the temperature is higher
> + * than COM_SHUT or COM_INT.
> + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
> + * if the temperature is higher than COMP_INT or COMP_SHUT for
> + * "debounce" times, TSADC controller will generate interrupt or TSHUT.
> + */
> +static void rk_tsadcv2_initialize(void __iomem *regs,
> + enum tshut_polarity tshut_polarity,
> + unsigned long clk_rate)
> +{
> + u32 val;
> +
> + if (tshut_polarity == TSHUT_HIGH_ACTIVE)
> + writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
> + regs + TSADCV2_AUTO_CON);
> + else
> + writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
> + regs + TSADCV2_AUTO_CON);
> +
> + val = TSADCV2_AUTO_PERIOD_TIME * clk_rate / 1000;
> + writel_relaxed(val, regs + TSADCV2_AUTO_PERIOD);
> + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
> + regs + TSADCV2_HIGHT_INT_DEBOUNCE);
> +
> + val = TSADCV2_AUTO_PERIOD_HT_TIME * clk_rate / 1000;
> + writel_relaxed(val, regs + TSADCV2_AUTO_PERIOD_HT);
> + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
> + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
> +}
> +
> +static void rk_tsadcv2_irq_ack(void __iomem *regs)
> +{
> + u32 val;
> +
> + val = readl_relaxed(regs + TSADCV2_INT_PD);
> + writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
> +}
> +
> +static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, long *temp)
> +{
> + u32 val;
> +
> + /* the A/D value of the channel last conversion need some time */
> + val = readl_relaxed(regs + TSADCV2_DATA(chn));
> + if (val == 0)
> + return -EAGAIN;
> +
> + *temp = rk_tsadcv2_code_to_temp(val);
> +
> + return 0;
> +}
> +
> +static void rk_tsadcv2_alarm_temp(int chn, void __iomem *regs, long temp)
> +{
> + u32 alarm_value, int_en;
> +
> + alarm_value = rk_tsadcv2_temp_to_code(temp);
> + writel_relaxed(alarm_value & TSADCV2_DATA_MASK,
> + regs + TSADCV2_COMP_INT(chn));
> +
> + int_en = readl_relaxed(regs + TSADCV2_INT_EN);
> + int_en |= TSADCV2_INT_SRC_EN(chn);
> + writel_relaxed(int_en, regs + TSADCV2_INT_EN);
> +}
> +
> +static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
> +{
> + u32 tshut_value;
> +
> + tshut_value = rk_tsadcv2_temp_to_code(temp);
> + writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
> +}
> +
> +static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> + enum tshut_mode mode)
> +{
> + u32 val;
> +
> + val = readl_relaxed(regs + TSADCV2_INT_EN);
> + if (mode == TSHUT_MODE_GPIO) {
> + val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
> + val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
> + } else {
> + val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
> + val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
> + }
> +
> + writel_relaxed(val, regs + TSADCV2_INT_EN);
> +
> + /* TSHUT will be valid */
> + val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> + writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
I think this should be done after we set the target temperature since we
do not know if it is currently valid or not. Please move into
rk_tsadcv2_tshut_temp().
> +}
> +
> +static void rk_tsadcv2_control(int chn, void __iomem *regs, bool enable)
> +{
> + u32 val;
> +
> + val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> + if (enable)
> + val |= TSADCV2_AUTO_EN;
> + else
> + val &= ~TSADCV2_AUTO_EN;
> +
> + writel_relaxed(val, regs + TSADCV2_AUTO_CON);
This is not channel-specific, so we should drop the id argument.
> +}
> +
> +static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
> + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> + .hw_shut_temp = 125000,
> +
> + .initialize = rk_tsadcv2_initialize,
> + .irq_ack = rk_tsadcv2_irq_ack,
> + .get_temp = rk_tsadcv2_get_temp,
> + .set_alarm_temp = rk_tsadcv2_alarm_temp,
> + .set_tshut_temp = rk_tsadcv2_tshut_temp,
> + .set_tshut_mode = rk_tsadcv2_tshut_mode,
> + .control = rk_tsadcv2_control,
> +};
> +
> +static const struct of_device_id of_rockchip_thermal_match[] = {
> + {
> + .compatible = "rockchip,rk3288-tsadc",
> + .data = (void *)&rk3288_tsadc_data,
> + },
> + { /* end */ },
> +};
> +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
> +
> +static void
> +rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
> +{
> + struct thermal_zone_device *tzd = sensor->tzd;
> +
> + tzd->ops->set_mode(tzd,
> + on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
> +}
> +
> +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
> +{
> + struct rockchip_thermal_data *thermal = dev;
> + int i;
> +
> + dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
> +
> + thermal->chip->irq_ack(thermal->regs);
> +
> + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
> + thermal_zone_device_update(thermal->sensors[i].tzd);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int rockchip_thermal_set_trips(void *_sensor, long low, long high)
> +{
> + struct rockchip_thermal_sensor *sensor = _sensor;
> + struct rockchip_thermal_data *thermal = sensor->thermal;
> + const struct rockchip_tsadc_chip *tsadc = thermal->chip;
> +
> + dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %ld, high %ld\n",
> + __func__, sensor->id, low, high);
> +
> + tsadc->set_alarm_temp(sensor->id, thermal->regs, high);
> +
> + return 0;
> +}
> +
> +static int rockchip_thermal_get_temp(void *_sensor, long *out_temp)
> +{
> + struct rockchip_thermal_sensor *sensor = _sensor;
> + struct rockchip_thermal_data *thermal = sensor->thermal;
> + const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
> + int retval;
> +
> + retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
> + dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n",
> + sensor->id, *out_temp, retval);
> +
> + return retval;
> +}
> +
> +static int rockchip_configure_from_dt(struct device *dev,
> + struct device_node *np,
> + struct rockchip_thermal_data *thermal)
> +{
> + u32 shut_temp, tshut_mode, tshut_polarity;
> +
> + if (of_property_read_u32(np, "hw-shut-temp", &shut_temp)) {
> + dev_warn(dev,
> + "Missing tshut temp property, using default %ld\n",
> + thermal->chip->hw_shut_temp);
> + thermal->hw_shut_temp = thermal->chip->hw_shut_temp;
> + } else {
> + thermal->hw_shut_temp = shut_temp;
> + }
> +
> + if (thermal->hw_shut_temp > INT_MAX) {
> + dev_err(dev, "Invalid tshut temperature specified: %u\n",
> + thermal->hw_shut_temp);
> + return -ERANGE;
> + }
> +
> + if (of_property_read_u32(np, "tsadc-tshut-mode", &tshut_mode)) {
> + dev_warn(dev,
> + "Missing tshut mode property, using default (%s)\n",
> + thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
> + "gpio" : "cru");
> + thermal->tshut_mode = thermal->chip->tshut_mode;
> + } else {
> + thermal->tshut_mode = tshut_mode;
> + }
> +
> + if (thermal->tshut_mode > 1) {
> + dev_err(dev, "Invalid tshut mode specified: %d\n",
> + thermal->tshut_mode);
> + return -EINVAL;
> + }
> +
> + if (of_property_read_u32(np, "tsadc-tshut-polarity", &tshut_polarity)) {
> + dev_warn(dev,
> + "Missing tshut-polarity property, using default (%s)\n",
> + thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
> + "low" : "high");
> + thermal->tshut_polarity = thermal->chip->tshut_polarity;
> + } else {
> + thermal->tshut_polarity = tshut_polarity;
> + }
> +
> + if (thermal->tshut_polarity > 1) {
> + dev_err(dev, "Invalid tshut-polarity specified: %d\n",
> + thermal->tshut_polarity);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +rockchip_thermal_register_sensor(struct platform_device *pdev,
> + struct rockchip_thermal_data *thermal,
> + struct rockchip_thermal_sensor *sensor,
> + enum sensor_id id)
> +{
> + const struct rockchip_tsadc_chip *tsadc = thermal->chip;
> + int error;
> +
> + tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
> + tsadc->set_tshut_temp(id, thermal->regs, thermal->hw_shut_temp);
> + thermal->chip->control(id, thermal->regs, true);
> +
> + sensor->thermal = thermal;
> + sensor->id = id;
> + sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
> + rockchip_thermal_get_temp,
> + NULL,
> + rockchip_thermal_set_trips);
> + if (IS_ERR(sensor->tzd)) {
> + error = PTR_ERR(sensor->tzd);
> + dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
> + id, error);
> + return error;
> + }
> +
> + return 0;
> +}
> +
> +static int rockchip_thermal_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct rockchip_thermal_data *thermal;
> + const struct of_device_id *match;
> + struct resource *res;
> + int irq;
> + int i;
> + int error;
> +
> + match = of_match_node(of_rockchip_thermal_match, np);
> + if (!match)
> + return -ENXIO;
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + dev_err(&pdev->dev, "no irq resource?\n");
> + return -EINVAL;
> + }
> +
> + thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
> + GFP_KERNEL);
> + if (!thermal)
> + return -ENOMEM;
> +
> + thermal->pdev = pdev;
> +
> + thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
> + if (!thermal->chip)
> + return -EINVAL;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + thermal->regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(thermal->regs))
> + return PTR_ERR(thermal->regs);
> +
> + thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
> + if (IS_ERR(thermal->clk)) {
> + error = PTR_ERR(thermal->clk);
> + dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
> + return error;
> + }
> +
> + thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
> + if (IS_ERR(thermal->pclk)) {
> + error = PTR_ERR(thermal->clk);
> + dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
> + error);
> + return error;
> + }
> +
> + error = clk_prepare_enable(thermal->clk);
> + if (error) {
> + dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
> + error);
> + return error;
> + }
> +
> + error = clk_prepare_enable(thermal->pclk);
> + if (error) {
> + dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
> + goto err_disable_clk;
> + }
> +
> + thermal->clk_rate = clk_get_rate(thermal->clk);
> + if (thermal->clk_rate == 0)
> + return -EPROBE_DEFER;
> +
> + error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
> + if (error) {
> + dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
> + error);
> + goto err_disable_pclk;
> + }
> +
> + thermal->chip->initialize(thermal->regs, thermal->tshut_polarity,
> + thermal->clk_rate);
> +
> + error = rockchip_thermal_register_sensor(pdev, thermal,
> + &thermal->sensors[0],
> + SENSOR_CPU);
> + if (error) {
> + dev_err(&pdev->dev,
> + "failed to register CPU thermal sensor: %d\n", error);
> + goto err_disable_pclk;
> + }
> +
> + error = rockchip_thermal_register_sensor(pdev, thermal,
> + &thermal->sensors[1],
> + SENSOR_GPU);
> + if (error) {
> + dev_err(&pdev->dev,
> + "failed to register GPU thermal sensor: %d\n", error);
> + goto err_unregister_cpu_sensor;
> + }
> +
> + error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
> + &rockchip_thermal_alarm_irq_thread,
> + IRQF_ONESHOT,
> + "rockchip_thermal", thermal);
> + if (error) {
> + dev_err(&pdev->dev,
> + "failed to request tsadc irq: %d\n", error);
> + goto err_unregister_gpu_sensor;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
> + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
> +
> + platform_set_drvdata(pdev, thermal);
> +
> + return 0;
> +
> +err_unregister_gpu_sensor:
> + thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
> +err_unregister_cpu_sensor:
> + thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
> +err_disable_pclk:
> + clk_disable_unprepare(thermal->pclk);
> +err_disable_clk:
> + clk_disable_unprepare(thermal->clk);
> +
> + return error;
> +}
> +
> +static int rockchip_thermal_remove(struct platform_device *pdev)
> +{
> + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
> + struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
> +
> + rockchip_thermal_toggle_sensor(sensor, false);
> + thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
> + }
> +
> + clk_disable_unprepare(thermal->clk);
> + clk_disable_unprepare(thermal->pclk);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
> + rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
> + thermal->chip->control(i, thermal->regs, false);
> + }
> +
> + clk_disable(thermal->clk);
> + clk_disable(thermal->pclk);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused rockchip_thermal_resume(struct device *dev)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
> + int i;
> + int error;
> +
> + error = clk_enable(thermal->pclk);
> + if (error)
> + return error;
> +
> + error = clk_enable(thermal->clk);
> + if (error)
> + return error;
> +
> + thermal->chip->initialize(thermal->regs, thermal->tshut_polarity,
> + thermal->clk_rate);
> +
> + for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
> + thermal->chip->control(i, thermal->regs, true);
> + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
> + }
I think we should also restore tshut mode and temperature here as well.
> +
> + return 0;
> +}
> +
> +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
> + rockchip_thermal_suspend, rockchip_thermal_resume);
> +
> +static struct platform_driver rockchip_thermal_driver = {
> + .driver = {
> + .name = "rockchip-thermal",
> + .owner = THIS_MODULE,
> + .pm = &rockchip_thermal_pm_ops,
> + .of_match_table = of_rockchip_thermal_match,
> + },
> + .probe = rockchip_thermal_probe,
> + .remove = rockchip_thermal_remove,
> +};
> +
> +module_platform_driver(rockchip_thermal_driver);
> +
> +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
> +MODULE_AUTHOR("Rockchip, Inc.");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:rockchip-thermal");
> --
> 1.9.1
>
>
Thanks.
--
Dmitry
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