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Message-ID: <20140827180207.GA8187@core.coreip.homeip.net>
Date: Wed, 27 Aug 2014 11:02:08 -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,
grant.likely@...aro.org, robh+dt@...nel.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, huangtao@...k-chips.com,
cf@...k-chips.com, dianders@...omium.org, zyw@...k-chips.com,
addy.ke@...k-chips.com, zhaoyifeng <zyf@...k-chips.com>
Subject: Re: [PATCH v2 1/2] thermal: rockchip: add driver for thermal
On Thu, Aug 28, 2014 at 01:18:12AM +0800, Caesar Wang wrote:
> Hi Dmtry,
>
> 在 2014年08月27日 08:11, Dmitry Torokhov 写道:
> >Hi Caesar,
> >
> >On Wed, Aug 27, 2014 at 07:41:42AM +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>
> >>Change-Id: I00e7df78c497704657aff16e602aa56b4c14c6f5
> >>---
> >> drivers/thermal/Kconfig | 9 +
> >> drivers/thermal/Makefile | 1 +
> >> drivers/thermal/rockchip_thermal.c | 644 ++++++++++++++++++++++++++++++++++++
> >> 3 files changed, 654 insertions(+)
> >> create mode 100644 drivers/thermal/rockchip_thermal.c
> >>
> >>diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> >>index 74226dc..43d2400 100644
> >>--- a/drivers/thermal/Kconfig
> >>+++ b/drivers/thermal/Kconfig
> >>@@ -141,6 +141,15 @@ 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
> >>+ Support for Temperature Sensor ADC (TS-ADC) found on Rockchip SoCs.
> >>+ It supports one critical trip point and one passive trip point. The
> >>+ cpufreq is used as the cooling device to throttle CPUs when the
> >>+ passive trip is crossed.
> >>+
> >> 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 419c3cd..009a457 100644
> >>--- a/drivers/thermal/Makefile
> >>+++ b/drivers/thermal/Makefile
> >>@@ -20,6 +20,7 @@ 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..dea4dc3
> >>--- /dev/null
> >>+++ b/drivers/thermal/rockchip_thermal.c
> >>@@ -0,0 +1,644 @@
> >>+/*
> >>+ * 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/io.h>
> >>+#include <linux/interrupt.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/regulator/consumer.h>
> >>+#include <linux/cpu_cooling.h>
> >>+#include "thermal_core.h"
> >>+
> >>+enum rockchip_thermal_trip {
> >>+ ROCKCHIP_TRIP_PASSIVE,
> >>+ ROCKCHIP_TRIP_CRITICAL,
> >>+ ROCKCHIP_TRIP_NUM,
> >>+};
> >>+
> >>+struct rockchip_thermal_data {
> >>+ const struct rockchip_tsadc_platform_data *pdata;
> >>+ struct thermal_zone_device *tz;
> >>+ struct thermal_cooling_device *cdev;
> >>+ enum thermal_device_mode mode;
> >>+ void __iomem *regs;
> >>+
> >>+ signed long temp_passive;
> >>+ signed long temp_critical;
> >>+ signed long temp_force_shut;
> >>+ signed long alarm_temp;
> >>+ signed long last_temp;
> >>+ bool irq_enabled;
> >>+ int irq;
> >>+ struct clk *tsadc_clk;
> >>+ struct clk *tsadc_pclk;
> >>+};
> >>+
> >>+struct rockchip_tsadc_platform_data {
> >>+ u8 irq_en;
> >>+ signed long temp_passive;
> >>+ signed long temp_critical;
> >>+ signed long temp_force_shut;
> >>+ int passive_delay;
> >>+ int polling_delay;
> >>+
> >>+ int (*irq_handle)(void __iomem *reg);
> >>+ int (*initialize)(void __iomem *reg, signed long temp_force_shut);
> >>+ int (*control)(void __iomem *reg, bool on);
> >>+ u32 (*code_to_temp)(int temp);
> >>+ u32 (*temp_to_code)(int temp);
> >>+ void (*set_alarm_temp)(void __iomem *regs, signed long temp);
> >>+};
> >>+
> >>+/*TSADC V2 Sensor info define:*/
> >>+#define TSADCV2_AUTO_CON 0x04
> >>+#define TSADCV2_INT_EN 0x08
> >>+#define TSADCV2_INT_PD 0x0c
> >>+#define TSADCV2_DATA1 0x24
> >>+#define TSADCV2_COMP1_INT 0x34
> >>+#define TSADCV2_COMP1_SHUT 0x44
> >>+#define TSADCV2_AUTO_PERIOD 0x68
> >>+#define TSADCV2_AUTO_PERIOD_HT 0x6c
> >>+
> >>+#define TSADCV2_AUTO_SRC1_EN (1 << 5)
> >>+#define TSADCV2_AUTO_EN (1 << 0)
> >>+#define TSADCV2_AUTO_DISABLE ~(1 << 0)
> >>+#define TSADCV2_AUTO_STAS_BUSY (1 << 16)
> >>+#define TSADCV2_AUTO_STAS_BUSY_MASK (1 << 16)
> >>+#define TSADCV2_SHUT_2GPIO_SRC1_EN (1 << 5)
> >>+#define TSADCV2_INT_SRC1_EN (1 << 1)
> >>+#define TSADCV2_SHUT_SRC1_STATUS (1 << 5)
> >>+#define TSADCV2_INT_SRC1_STATUS (1 << 1)
> >>+
> >>+#define TSADCV2_DATA_MASK 0xfff
> >>+#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60
> >>+#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64
> >>+#define TSADCV2_HIGHT_INT_DEBOUNCE_TIME 0x0a
> >>+#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME 0x0a
> >>+#define TSADCV2_AUTO_PERIOD_TIME 0x03e8
> >>+#define TSADCV2_AUTO_PERIOD_HT_TIME 0x64
> >>+
> >>+struct tsadc_table {
> >>+ int code;
> >>+ int temp;
> >>+};
> >>+
> >>+static const struct tsadc_table v2_code_table[] = {
> >>+ {TSADCV2_DATA_MASK, -40},
> >>+ {3800, -40},
> >>+ {3792, -35},
> >>+ {3783, -30},
> >>+ {3774, -25},
> >>+ {3765, -20},
> >>+ {3756, -15},
> >>+ {3747, -10},
> >>+ {3737, -5},
> >>+ {3728, 0},
> >>+ {3718, 5},
> >>+ {3708, 10},
> >>+ {3698, 15},
> >>+ {3688, 20},
> >>+ {3678, 25},
> >>+ {3667, 30},
> >>+ {3656, 35},
> >>+ {3645, 40},
> >>+ {3634, 45},
> >>+ {3623, 50},
> >>+ {3611, 55},
> >>+ {3600, 60},
> >>+ {3588, 65},
> >>+ {3575, 70},
> >>+ {3563, 75},
> >>+ {3550, 80},
> >>+ {3537, 85},
> >>+ {3524, 90},
> >>+ {3510, 95},
> >>+ {3496, 100},
> >>+ {3482, 105},
> >>+ {3467, 110},
> >>+ {3452, 115},
> >>+ {3437, 120},
> >>+ {3421, 125},
> >>+ {0, 125},
> >>+};
> >>+
> >>+static int rk_tsadcv2_irq_handle(void __iomem *regs)
> >>+{
> >>+ u32 val;
> >>+
> >>+ val = readl_relaxed(regs + TSADCV2_INT_PD);
> >>+ writel_relaxed(val & ~(1 << 8), regs + TSADCV2_INT_PD);
> >>+
> >>+ return 0;
> >>+}
> >>+
> >>+static u32 rk_tsadcv2_temp_to_code(int temp)
> >>+{
> >>+ u32 code = 0;
> >>+ int i;
> >>+
> >>+ for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
> >>+ if (temp <= v2_code_table[i].temp && temp >
> >>+ v2_code_table[i - 1].temp)
> >Since array is sorted you should be able to do only one comparison, on
> >the upper bound. Also, as soon as you find the code you can return it,
> >there is no need to continue scanning the array.
>
> sound reasonable, I will fix it ,as the folllow:
>
> for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
> if (temp <= v2_code_table[i].temp && temp >
> v2_code_table[i - 1].temp){
> code = v2_code_table[i].code;
> break;
> }
> }
Would not the following be a bit simpler:
for (i = 1; i < ARRAY_SIZE(v2_code_table) - 1; i++)
if (temp <= v2_code_table[i].temp)
return v2_code_table[i].code;
return 0;
>
> >>+ code = v2_code_table[i].code;
> >>+ }
> >>+ return code;
> >>+}
> >>+
> >>+static u32 rk_tsadcv2_code_to_temp(int code)
> >>+{
> >>+ u32 temp = 0;
> >>+ int i;
> >>+
> >>+ for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
> >>+ if (code <= v2_code_table[i].code && code >
> >>+ v2_code_table[i + 1].code)
> >>+ temp = v2_code_table[i].temp;
> >>+ }
> >>+ return temp;
> >>+}
> >>+
> Ditto,
> >>+static int rk_tsadcv2_initialize(void __iomem *regs,
> >>+ signed long temp_force_shut)
> >>+{
> >>+ int shutdown_value;
> >>+
> >>+ shutdown_value = rk_tsadcv2_temp_to_code(temp_force_shut);
> >>+ /* Enable measurements at ~ 10 Hz */
> >>+ writel_relaxed(0, regs + TSADCV2_AUTO_CON);
> >>+ writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
> >>+ writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, regs +
> >>+ TSADCV2_AUTO_PERIOD_HT);
> >>+ writel_relaxed(shutdown_value, regs + TSADCV2_COMP1_SHUT);
> >>+ writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_TIME, regs +
> >>+ TSADCV2_HIGHT_INT_DEBOUNCE);
> >>+ writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME, regs +
> >>+ TSADCV2_HIGHT_TSHUT_DEBOUNCE);
> >>+ writel_relaxed(TSADCV2_SHUT_2GPIO_SRC1_EN | TSADCV2_INT_SRC1_EN, regs +
> >>+ TSADCV2_INT_EN);
> >>+ writel_relaxed(TSADCV2_AUTO_SRC1_EN | TSADCV2_AUTO_EN, regs +
> >>+ TSADCV2_AUTO_CON);
> >>+ return 0;
> >>+}
> >>+
> >>+static int rk_tsadcv2_control(void __iomem *regs, bool on)
> >>+{
> >>+ u32 val;
> >>+
> >>+ if (on) {
> >>+ val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> >>+ writel_relaxed(val | TSADCV2_AUTO_EN, regs + TSADCV2_AUTO_CON);
> >>+ } else {
> >>+ val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> >>+ writel_relaxed(val & TSADCV2_AUTO_DISABLE,
> >>+ regs + TSADCV2_AUTO_CON);
> >>+ }
> >>+ return 0;
> >>+}
> >>+
> >>+static void rk_tsadcv2_alarm_temp(void __iomem *regs, signed long alarm_temp)
> >>+{
> >>+ int alarm_value;
> >>+
> >>+ alarm_value = rk_tsadcv2_temp_to_code(alarm_temp);
> >>+ writel_relaxed(alarm_value, regs + TSADCV2_COMP1_INT);
> >>+}
> >>+
> >>+struct rockchip_tsadc_platform_data const rk3288_tsadc_data = {
> >>+ .irq_en = 1,
> >>+ .temp_passive = 85000,
> >>+ .temp_critical = 100000,
> >>+ .temp_force_shut = 120000,
> >>+ .passive_delay = 2000,
> >>+ .polling_delay = 1000,
> >>+ .irq_handle = rk_tsadcv2_irq_handle,
> >>+ .initialize = rk_tsadcv2_initialize,
> >>+ .control = rk_tsadcv2_control,
> >>+ .code_to_temp = rk_tsadcv2_code_to_temp,
> >>+ .temp_to_code = rk_tsadcv2_temp_to_code,
> >>+ .set_alarm_temp = rk_tsadcv2_alarm_temp,
> >>+};
> >>+
> >>+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_set_alarm_temp(struct rockchip_thermal_data *data,
> >>+ signed long alarm_temp)
> >>+{
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+ data->alarm_temp = alarm_temp;
> >>+ if (p_tsadc_data->set_alarm_temp)
> >>+ p_tsadc_data->set_alarm_temp(data->regs, alarm_temp);
> >>+}
> >>+
> >>+static int rockchip_get_temp(struct thermal_zone_device *tz,
> >>+ unsigned long *temp)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+ u32 val;
> >>+
> >>+ val = readl_relaxed(data->regs + TSADCV2_DATA1);
> >>+ *temp = p_tsadc_data->code_to_temp(val);
> >>+
> >>+ /* Update alarm value to next higher trip point */
> >>+ if (data->alarm_temp == data->temp_passive && *temp >=
> >>+ data->temp_passive)
> >>+ rockchip_set_alarm_temp(data, data->temp_critical);
> >>+
> >>+ if (data->alarm_temp == data->temp_critical && *temp <
> >>+ data->temp_passive) {
> >>+ rockchip_set_alarm_temp(data, data->temp_passive);
> >>+ dev_dbg(&tz->device, "thermal alarm off: T < %lu\n",
> >>+ data->alarm_temp / 1000);
> >>+ }
> >>+
> >>+ if (*temp != data->last_temp) {
> >>+ dev_dbg(&tz->device, "millicelsius: %ld\n", *temp);
> >>+ data->last_temp = *temp;
> >>+ }
> >>+
> >>+ /* Reenable alarm IRQ if temperature below alarm temperature */
> >>+ if (!data->irq_enabled && *temp < data->alarm_temp) {
> >>+ data->irq_enabled = true;
> >>+ enable_irq(data->irq);
> >>+ }
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_thermal_initialize(struct rockchip_thermal_data *data)
> >>+{
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+ if (p_tsadc_data->initialize)
> >>+ p_tsadc_data->initialize(data->regs, data->temp_force_shut);
> >>+ rockchip_set_alarm_temp(data, data->temp_passive);
> >>+ return 0;
> >>+}
> >>+
> >>+static void rockchip_thermal_control(struct rockchip_thermal_data *data,
> >>+ bool on)
> >>+{
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+ if (p_tsadc_data->control)
> >>+ p_tsadc_data->control(data->regs, on);
> >>+
> >>+ if (on) {
> >>+ data->irq_enabled = true;
> >>+ data->mode = THERMAL_DEVICE_ENABLED;
> >>+ } else {
> >>+ data->irq_enabled = false;
> >>+ data->mode = THERMAL_DEVICE_DISABLED;
> >>+ }
> >>+}
> >>+
> >>+static int rockchip_get_mode(struct thermal_zone_device *tz,
> >>+ enum thermal_device_mode *mode)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+ *mode = data->mode;
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_set_mode(struct thermal_zone_device *tz,
> >>+ enum thermal_device_mode mode)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+ if (mode == THERMAL_DEVICE_ENABLED) {
> >>+ tz->polling_delay = p_tsadc_data->polling_delay;
> >>+ tz->passive_delay = p_tsadc_data->passive_delay;
> >>+ rockchip_thermal_control(data, true);
> >>+ if (!data->irq_enabled) {
> >>+ data->irq_enabled = true;
> >>+ enable_irq(data->irq);
> >>+ }
I believe I commented on this chunk elsewhere. Given current definition of
rockchip_thermal_control() I do not think the code works they way you intended.
> >>+ } else {
> >>+ rockchip_thermal_control(data, false);
> >>+ tz->polling_delay = 0;
> >>+ tz->passive_delay = 0;
> >>+ if (data->irq_enabled) {
> >>+ disable_irq(data->irq);
> >>+ data->irq_enabled = false;
> >>+ }
> >>+ }
> >>+
> >>+ data->mode = mode;
> >>+ thermal_zone_device_update(tz);
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_get_trip_type(struct thermal_zone_device *tz, int trip,
> >>+ enum thermal_trip_type *type)
> >>+{
> >>+ *type = (trip == ROCKCHIP_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE :
> >>+ THERMAL_TRIP_CRITICAL;
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_get_crit_temp(struct thermal_zone_device *tz,
> >>+ unsigned long *temp)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+ *temp = data->temp_critical;
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_get_trip_temp(struct thermal_zone_device *tz, int trip,
> >>+ unsigned long *temp)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+ *temp = (trip == ROCKCHIP_TRIP_PASSIVE) ? data->temp_passive :
> >>+ data->temp_critical;
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_set_trip_temp(struct thermal_zone_device *tz, int trip,
> >>+ unsigned long temp)
> >>+{
> >>+ struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+ if (trip == ROCKCHIP_TRIP_CRITICAL)
> >>+ return -EPERM;
> >>+
> >>+ data->temp_passive = temp;
> >>+ rockchip_set_alarm_temp(data, temp);
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_bind(struct thermal_zone_device *tz,
> >>+ struct thermal_cooling_device *cdev)
> >>+{
> >>+ int ret;
> >>+
> >>+ ret = thermal_zone_bind_cooling_device(tz, ROCKCHIP_TRIP_PASSIVE, cdev,
> >>+ THERMAL_NO_LIMIT,
> >>+ THERMAL_NO_LIMIT);
> >>+ if (ret) {
> >>+ dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",
> >>+ tz->type, cdev->type, ret);
> >>+ return ret;
> >>+ }
> >>+ return 0;
> >>+}
> >>+
> >>+static int rockchip_unbind(struct thermal_zone_device *tz,
> >>+ struct thermal_cooling_device *cdev)
> >>+{
> >>+ int ret;
> >>+
> >>+ ret = thermal_zone_unbind_cooling_device(tz,
> >>+ ROCKCHIP_TRIP_PASSIVE, cdev);
> >>+ if (ret) {
> >>+ dev_err(&tz->device,
> >>+ "unbinding zone %s with cdev %s failed:%d\n", tz->type,
> >>+ cdev->type, ret);
> >>+ return ret;
> >>+ }
> >>+
> >>+ return 0;
> >>+}
> >>+
> >>+static struct thermal_zone_device_ops rockchip_tz_ops = {
> >>+ .bind = rockchip_bind,
> >>+ .unbind = rockchip_unbind,
> >>+ .get_temp = rockchip_get_temp,
> >>+ .get_mode = rockchip_get_mode,
> >>+ .set_mode = rockchip_set_mode,
> >>+ .get_trip_type = rockchip_get_trip_type,
> >>+ .get_trip_temp = rockchip_get_trip_temp,
> >>+ .get_crit_temp = rockchip_get_crit_temp,
> >>+ .set_trip_temp = rockchip_set_trip_temp,
> >>+};
> >>+
> >>+static irqreturn_t rockchip_thermal_alarm_irq(int irq, void *dev)
> >>+{
> >>+ struct rockchip_thermal_data *data = dev;
> >>+
> >>+ disable_irq_nosync(irq);
> >>+ data->irq_enabled = false;
> >>+
> >>+ return IRQ_WAKE_THREAD;
> >I think you want IRQF_ONESHOT instead of doing disable_irq dance (BTW I
> >also do not see you enabling it in your threaded handle so I wonder how
> >it worked for you).
>
> Sorry, I will remove it. Amended as follows:
>
> ...
> ret = devm_request_threaded_irq(&pdev->dev, data->irq,
> NULL,
> rockchip_thermal_alarm_irq_thread,
> IRQF_ONESHOT,
> "rockchip_thermal", data);
>
> >>+}
> >>+
> >>+static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
> >>+{
> >>+ struct rockchip_thermal_data *data = data;
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+ dev_dbg(&data->tz->device, "THERMAL ALARM: T > %lu\n",
> >>+ data->alarm_temp / 1000);
> >>+
> >>+ if (p_tsadc_data->irq_en && p_tsadc_data->irq_handle)
> >>+ p_tsadc_data->irq_handle(data->regs);
> >>+
> >>+ thermal_zone_device_update(data->tz);
> >>+
> >>+ return IRQ_HANDLED;
> >>+}
> >>+
> >>+static int rockchip_thermal_probe(struct platform_device *pdev)
> >>+{
> >>+ struct rockchip_thermal_data *data;
> >>+ const struct rockchip_tsadc_platform_data *p_tsadc_data;
> >>+ struct cpumask clip_cpus;
> >>+ struct resource *res;
> >>+ const struct of_device_id *match;
> >>+ int ret, temp;
> >>+
> >>+ data = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
> >>+ GFP_KERNEL);
> >>+ if (!data)
> >>+ return -ENOMEM;
> >>+
> >>+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >>+ data->regs = devm_ioremap_resource(&pdev->dev, res);
> >>+ if (IS_ERR(data->regs)) {
> >>+ dev_err(&pdev->dev, "Could not get tsadc source, %p\n",
> >>+ data->regs);
> >>+ return PTR_ERR(data->regs);
> >>+ }
> >>+
> >>+ match = of_match_node(of_rockchip_thermal_match, pdev->dev.of_node);
> >>+ if (!match)
> >>+ return -ENXIO;
> >>+ data->pdata = (const struct rockchip_tsadc_platform_data *)match->data;
> >>+ if (!data->pdata)
> >>+ return -EINVAL;
> >>+ p_tsadc_data = data->pdata;
> >>+
> >>+ data->tsadc_clk = devm_clk_get(&pdev->dev, "tsadc_clk");
> >>+ if (IS_ERR(data->tsadc_clk)) {
> >>+ dev_err(&pdev->dev, "failed to get tsadc clock\n");
> >>+ return PTR_ERR(data->tsadc_clk);
> >>+ }
> >Throw in a blank line here please.
>
> OK.
>
> >>+ ret = clk_prepare_enable(data->tsadc_clk);
> >>+ if (ret)
> >>+ return ret;
> >>+
> >>+ data->tsadc_pclk = devm_clk_get(&pdev->dev, "tsadc_pclk");
> >>+ if (IS_ERR(data->tsadc_pclk)) {
> >>+ dev_err(&pdev->dev, "failed to get tsadc pclk\n");
> >>+ return PTR_ERR(data->tsadc_pclk);
> >>+ }
> >And here too.
> >
>
> OK.
>
> >>+ ret = clk_prepare_enable(data->tsadc_pclk);
> >>+ if (ret)
> >>+ return ret;
> >>+
> >>+ platform_set_drvdata(pdev, data);
> >>+
> >>+ if (of_property_read_u32(pdev->dev.of_node, "passive-temp", &temp)) {
> >>+ dev_warn(&pdev->dev,
> >>+ "Missing default passive temp property in the DT.\n");
> >>+ data->temp_passive = p_tsadc_data->temp_passive;
> >>+ } else {
> >>+ data->temp_passive = temp;
> >>+ }
> >>+
> >>+ if (of_property_read_u32(pdev->dev.of_node, "critical-temp", &temp)) {
> >>+ dev_warn(&pdev->dev,
> >>+ "Missing default critical temp property in the DT.\n");
> >>+ data->temp_critical = p_tsadc_data->temp_critical;
> >>+ } else {
> >>+ data->temp_critical = temp;
> >>+ }
> >>+
> >>+ if (of_property_read_u32(pdev->dev.of_node, "force-shut-temp", &temp)) {
> >>+ dev_warn(&pdev->dev,
> >>+ "Missing default force shut down temp property in the DT.\n");
> >>+ data->temp_force_shut = p_tsadc_data->temp_force_shut;
> >>+ } else {
> >>+ data->temp_force_shut = temp;
> >>+ }
> >>+
> >>+ cpumask_set_cpu(0, &clip_cpus);
> >>+ data->cdev = of_cpufreq_cooling_register(pdev->dev.of_node, &clip_cpus);
> >>+ if (IS_ERR(data->cdev)) {
> >>+ ret = PTR_ERR(data->cdev);
> >>+ dev_err(&pdev->dev,
> >>+ "failed to register cpufreq cooling device: %d\n", ret);
> >Don't you need to disable clocks here? Disbale operation is not devm
> >controlled as far as I know.
> Oh, you are right!
>
> As you say, maybe I willl fix it, as the following:
>
> clk_disable_unprepare(data->tsadc_clk);
> clk_disable_unprepare(data->tsadc_pclk);
Yo uneed to do it not only here but in other return paths as well. I'd
recommend doing the common "goto err_label;" error unwinding pattern.
>
> >
> >>+ return ret;
> >>+ }
> >>+
> >>+ data->tz = thermal_zone_device_register("rockchip_thermal",
> >>+ ROCKCHIP_TRIP_NUM,
> >>+ 0, data,
> >>+ &rockchip_tz_ops, NULL,
> >>+ p_tsadc_data->passive_delay,
> >>+ p_tsadc_data->polling_delay);
> >>+
> >>+ if (IS_ERR(data->tz)) {
> >>+ ret = PTR_ERR(data->tz);
> >>+ dev_err(&pdev->dev,
> >>+ "failed to register thermal zone device %d\n", ret);
> >>+ cpufreq_cooling_unregister(data->cdev);
> >>+ return ret;
> >>+ }
> >>+
> >>+ if (p_tsadc_data->irq_en) {
> >>+ data->irq = platform_get_irq(pdev, 0);
> >>+ if (data->irq < 0)
> >You are leaking thermal and colling device here.
> >
>
> As follows:
>
> if (p_tsadc_data->irq_en) {
> data->irq = platform_get_irq(pdev, 0);
> if (data->irq < 0) {
> + thermal_zone_device_unregister(data->tz);
> + cpufreq_cooling_unregister(data->cdev);
And clocks... As I said, use the common kernel "goto err_out" pattern.
Thanks.
--
Dmitry
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