> -----Original Message-----
> From: Eduardo Valentin [mailto:edubez...@gmail.com]
> Sent: Friday, August 14, 2015 12:29 PM
> To: Jia Hongtao-B38951
> Cc: Wood Scott-B07421; linuxppc-dev@lists.ozlabs.org; linux-
> p...@vger.kernel.org
> Subject: Re: [PATCH V2] QorIQ/TMU: add thermal management support based
> on TMU
>
> Hello Hongtao,
>
> On Fri, Aug 14, 2015 at 03:15:22AM +0000, Hongtao Jia wrote:
> > Hi Eduardo,
> >
> > In previous mail I asked questions about including header files in
> device tree.
> > Don't bother, I have already figured out the solution.
> >
> > Another questions is about cpu cooling:
> > I found out that there is no explicit calling for registering cpu
> > cooling device in the of-thermal style drivers.
>
> Your understanding is correct.
>
> >
> > And Samsung did it in cpufreq driver: drivers/cpufreq/exynos-cpufreq.c
> >
>
> Yes.
>
> > Should all the of-thermal driver use the same way?
>
> of-thermal won't handle the cooling device registering. It is typically
> registered by the cpufreq driver. Have a look in
> drivers/cpufreq/cpufreq-dt.c
>
> > Or is there any recommendation for registering cpu cooling device?
> > (I enabled the CONFIG_CPUFREQ_DT and still got no cooling device
> > registered)
>
> If your system supports using cpufreq-dt, then it will handle registering
> the cpucooling for you, if you configures the cooling dt properties in
> your DT files.
>
> How does your DT entry look like?
Here is the related code snippet:
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu0: PowerPC,e5500@0 {
device_type = "cpu";
reg = <0>;
clocks = <&mux0>;
next-level-cache = <&L2_1>;
/*cooling-min-level = <0>;*/
/*cooling-max-level = <1>;*/
#cooling-cells = <2>;
L2_1: l2-cache {
next-level-cache = <&cpc>;
};
};
cpu1: PowerPC,e5500@1 {
device_type = "cpu";
reg = <1>;
clocks = <&mux1>;
next-level-cache = <&L2_2>;
/*cooling-min-level = <0>;*/
/*cooling-max-level = <1>;*/
#cooling-cells = <2>;
L2_2: l2-cache {
next-level-cache = <&cpc>;
};
};
cpu2: PowerPC,e5500@2 {
device_type = "cpu";
reg = <2>;
clocks = <&mux2>;
next-level-cache = <&L2_3>;
/*cooling-min-level = <0>;*/
/*cooling-max-level = <1>;*/
#cooling-cells = <2>;
L2_3: l2-cache {
next-level-cache = <&cpc>;
};
};
cpu3: PowerPC,e5500@3 {
device_type = "cpu";
reg = <3>;
clocks = <&mux3>;
next-level-cache = <&L2_4>;
/*cooling-min-level = <0>;*/
/*cooling-max-level = <1>;*/
#cooling-cells = <2>;
L2_4: l2-cache {
next-level-cache = <&cpc>;
};
};
......
thermal-zones {
cpu_thermal: cpu-thermal {
polling-delay-passive = <1000>;
polling-delay = <5000>;
thermal-sensors = <&tmu>;
trips {
cpu_alert: cpu-alert {
temperature = <45000>;
hysteresis = <2000>;
type = "passive";
};
cpu_crit: cpu-crit {
temperature = <95000>;
hysteresis = <2000>;
type = "critical";
};
};
cooling-maps {
map0 {
trip = <&cpu_alert>;
cooling-device =
<&cpu0 THERMAL_NO_LIMIT
THERMAL_NO_LIMIT>;
};
map1 {
trip = <&cpu_alert>;
cooling-device =
<&cpu1 THERMAL_NO_LIMIT
THERMAL_NO_LIMIT>;
};
map2 {
trip = <&cpu_alert>;
cooling-device =
<&cpu2 THERMAL_NO_LIMIT
THERMAL_NO_LIMIT>;
};
map3 {
trip = <&cpu_alert>;
cooling-device =
<&cpu3 THERMAL_NO_LIMIT
THERMAL_NO_LIMIT>;
};
};
};
};
Please note that I comment out the cooling-min-level and cooling-max-level
property. I'd like to let cpufreq driver parse these two property. I don't
quite clear if this is OK.
You said if the system support cpufreq-dt it will handle the cooling device
registration.
Then how to support cpufreq-dt? Do I need to update qoriq-cpufreq.c?
Do you have a quick answer for me?
Thanks.
-Hongtao.
>
> BR,
>
> Eduardo
> >
> > Thanks.
> >
> > ---
> > Best Regards,
> > Hongtao
> >
> >
> > > -----Original Message-----
> > > From: Linuxppc-dev [mailto:linuxppc-dev-
> > > bounces+b38951=freescale....@lists.ozlabs.org] On Behalf Of Hongtao
> > > bounces+Jia
> > > Sent: Friday, August 07, 2015 4:15 PM
> > > To: Eduardo Valentin
> > > Cc: Wood Scott-B07421; linuxppc-dev@lists.ozlabs.org; linux-
> > > p...@vger.kernel.org
> > > Subject: RE: [PATCH V2] QorIQ/TMU: add thermal management support
> > > based on TMU
> > >
> > > Thanks for your comments.
> > > Please see my questions inline.
> > >
> > > Thanks.
> > > ---
> > > Best Regards,
> > > Hongtao
> > >
> > >
> > > > -----Original Message-----
> > > > From: Eduardo Valentin [mailto:edubez...@gmail.com]
> > > > Sent: Thursday, August 06, 2015 3:43 AM
> > > > To: Jia Hongtao-B38951
> > > > Cc: linux...@vger.kernel.org; linuxppc-dev@lists.ozlabs.org; Wood
> > > > Scott-
> > > > B07421
> > > > Subject: Re: [PATCH V2] QorIQ/TMU: add thermal management support
> > > > based on TMU
> > > >
> > > > On Thu, Jul 30, 2015 at 08:13:09AM +0000, Hongtao Jia wrote:
> > > > > - "Any specific reason why not using OF thermal?"
> > > > > - No, actually.
> > > > >
> > > > > I'd like to use OF thermal after some clarification.
> > > > >
> > > > > Regarding to "cooling-maps". For some cases there should be more
> > > > > than one cpus as cooling device and they are independent.
> > > > > 1. Let's say 4. So we need to provide 4 maps like map0-map3.
> Right?
> > > >
> > > > That would depend on the amount of sensors you have. Do you have
> > > > one sensor per cpu? if the answer is yes, then you probably want
> > > > to have four different map entries, yes, but one on each thermal
> > > > zone of each cpu temperature sensor. if the answer is no, then you
> > > > would need to have all the maps in the same thermal zone.
> > > >
> > > > > 2. "cooling-max-level" may vary depend on switch settings or
> firmware.
> > > > Is that
> > > > > OK if I do not provide "cooling-min-level" and "cooling-max-
> level"
> > > > property?
> > > >
> > > > That is already achievable by using the cooling-device property of
> > > > a cooling map.
> > > >
> > > > Please have a look in the example section of the
> > > > Documentation/devicetree/bindings/thermal/thermal.txt
> > >
> > > Yes, I read this file.
> > > So in my understanding:
> > > There is no need to provide "cooling-min-level" and "cooling-max-
> level"
> > > property.
> > > THERMAL_NO_LIMIT value in cooling device node will indicate the
> > > driver to automatically parse the min and max state, right?
> > >
> > > Talking about THERMAL_NO_LIMIT, I need to #include <dt-
> > > bindings/thermal/thermal.h> to provide the definition. But I got
> > > compiling error when build dtb file.
> > > I did some research and using "make t1040qds.dtb" in order to
> > > involve preprocessor.
> > > But with simply adding "#include <dt-bindings/thermal/thermal.h>" to
> > > t1040si-post.dtsi at line 35 I still got error like this:
> > > Error: arch/powerpc/boot/dts/fsl/t1040si-post.dtsi:35.1-9 syntax
> > > error FATAL ERROR: Unable to parse input tree
> > >
> > > Could you help me out here.
> > > Thanks.
> > >
> > > >
> > > > Let me know if you need further clarification.
> > > >
> > > >
> > > > BR,
> > > >
> > > > Eduardo Valentin
> > > >
> > > > >
> > > > > Thanks.
> > > > > -Hongtao
> > > > >
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Eduardo Valentin [mailto:edubez...@gmail.com]
> > > > > > Sent: Thursday, July 30, 2015 2:56 PM
> > > > > > To: Jia Hongtao-B38951
> > > > > > Cc: linux...@vger.kernel.org; linuxppc-dev@lists.ozlabs.org;
> > > > > > Wood
> > > > > > Scott-
> > > > > > B07421
> > > > > > Subject: Re: [PATCH V2] QorIQ/TMU: add thermal management
> > > > > > support based on TMU
> > > > > >
> > > > > > On Wed, Jul 29, 2015 at 02:19:39PM +0800, Jia Hongtao wrote:
> > > > > > > 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.
> > > > > > >
> > > > > > > Signed-off-by: Jia Hongtao <hongtao....@freescale.com>
> > > > > > > ---
> > > > > > > This patch based on:
> > > > > > > http://patchwork.ozlabs.org/patch/482987/
> > > > > > >
> > > > > > > Changes for V2:
> > > > > > > * Add tmu-range parse.
> > > > > > > * Use default trend hook.
> > > > > > > * Using latest thermal_zone_bind_cooling_device API.
> > > > > > > * Add calibration check during initialization.
> > > > > > > * Disable/enalbe device when suspend/resume.
> > > > > > >
> > > > > > > drivers/thermal/Kconfig | 11 ++
> > > > > > > drivers/thermal/Makefile | 1 +
> > > > > > > drivers/thermal/qoriq_thermal.c | 406
> > > > > > > ++++++++++++++++++++++++++++++++++++++++
> > > > > > > 3 files changed, 418 insertions(+) create mode 100644
> > > > > > > drivers/thermal/qoriq_thermal.c
> > > > > > >
> > > > > > > diff --git a/drivers/thermal/Kconfig
> > > > > > > b/drivers/thermal/Kconfig index
> > > > > > > 118938e..a200745 100644
> > > > > > > --- a/drivers/thermal/Kconfig
> > > > > > > +++ b/drivers/thermal/Kconfig
> > > > > > > @@ -180,6 +180,17 @@ config IMX_THERMAL
> > > > > > > cpufreq is used as the cooling device to throttle
> CPUs
> > > > > > > when
> > > > the
> > > > > > > passive trip is crossed.
> > > > > > >
> > > > > > > +config QORIQ_THERMAL
> > > > > > > + tristate "Freescale QorIQ Thermal Monitoring Unit"
> > > > > > > + depends on CPU_THERMAL
> > > > > > > + depends on OF
> > > > > > > + default n
> > > > > > > + help
> > > > > > > + Enable thermal management based on Freescale QorIQ
> > > > > > > +Thermal
> > > > > > Monitoring
> > > > > > > + Unit (TMU). 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 SPEAR_THERMAL
> > > > > > > bool "SPEAr thermal sensor driver"
> > > > > > > depends on PLAT_SPEAR
> > > > > > > diff --git a/drivers/thermal/Makefile
> > > > > > > b/drivers/thermal/Makefile index
> > > > > > > 535dfee..8c25859 100644
> > > > > > > --- a/drivers/thermal/Makefile
> > > > > > > +++ b/drivers/thermal/Makefile
> > > > > > > @@ -33,6 +33,7 @@ obj-$(CONFIG_DOVE_THERMAL) +=
> > > dove_thermal.o
> > > > > > > obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o
> > > > > > > obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
> > > > > > > obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
> > > > > > > +obj-$(CONFIG_QORIQ_THERMAL) += qoriq_thermal.o
> > > > > > > obj-$(CONFIG_DB8500_CPUFREQ_COOLING) +=
> > > > db8500_cpufreq_cooling.o
> > > > > > > obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
> > > > > > > obj-$(CONFIG_X86_PKG_TEMP_THERMAL) +=
> > > > > > > x86_pkg_temp_thermal.o
> > > > > > > diff --git a/drivers/thermal/qoriq_thermal.c
> > > > > > > b/drivers/thermal/qoriq_thermal.c new file mode 100644 index
> > > > > > > 0000000..0694f42
> > > > > > > --- /dev/null
> > > > > > > +++ b/drivers/thermal/qoriq_thermal.c
> > > > > > > @@ -0,0 +1,406 @@
> > > > > > > +/*
> > > > > > > + * Copyright 2015 Freescale Semiconductor, Inc.
> > > > > > > + *
> > > > > > > + * 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.
> > > > > > > + *
> > > > > > > + */
> > > > > > > +
> > > > > > > +/*
> > > > > > > + * Based on Freescale QorIQ Thermal Monitoring Unit (TMU)
> > > > > > > +*/ #include <linux/cpufreq.h> #include
> > > > > > > +<linux/cpu_cooling.h> #include <linux/module.h> #include
> > > > > > > +<linux/platform_device.h> #include <linux/err.h> #include
> > > > > > > +<linux/io.h> #include <linux/of.h> #include
> > > > > > > +<linux/of_address.h> #include <linux/thermal.h>
> > > > > > > +
> > > > > > > +#define SITES_MAX 16
> > > > > > > +
> > > > > > > +#define TMU_TEMP_PASSIVE 85000
> > > > > > > +#define TMU_TEMP_CRITICAL 95000
> > > > > > > +
> > > > > > > +#define TMU_PASSIVE_DELAY 1000 /* Milliseconds */
> > > > > > > +#define TMU_POLLING_DELAY 5000
> > > > > > > +
> > > > > > > +/* The driver supports 1 passive trip point and 1 critical
> > > > > > > +trip point */ enum tmu_thermal_trip {
> > > > > > > + TMU_TRIP_PASSIVE,
> > > > > > > + TMU_TRIP_CRITICAL,
> > > > > > > + TMU_TRIP_NUM,
> > > > > > > +};
> > > > > > > +
> > > > > > > +/*
> > > > > > > + * QorIQ TMU Registers
> > > > > > > + */
> > > > > > > +struct qoriq_tmu_site_regs {
> > > > > > > + __be32 tritsr; /* Immediate Temperature Site
> > > > Register */
> > > > > > > + __be32 tratsr; /* Average Temperature Site
> Register
> > > > */
> > > > > > > + u8 res0[0x8];
> > > > > > > +} __packed;
> > > > > > > +
> > > > > > > +struct qoriq_tmu_regs {
> > > > > > > + __be32 tmr; /* Mode Register */
> > > > > > > +#define TMR_DISABLE 0x0
> > > > > > > +#define TMR_ME 0x80000000
> > > > > > > +#define TMR_ALPF 0x0c000000
> > > > > > > +#define TMR_MSITE 0x00008000
> > > > > > > +#define TMR_ALL (TMR_ME | TMR_ALPF | TMR_MSITE)
> > > > > > > + __be32 tsr; /* Status Register */
> > > > > > > + __be32 tmtmir; /* Temperature measurement
> interval
> > > > > > Register */
> > > > > > > +#define TMTMIR_DEFAULT 0x00000007
> > > > > > > + u8 res0[0x14];
> > > > > > > + __be32 tier; /* Interrupt Enable Register */
> > > > > > > +#define TIER_DISABLE 0x0
> > > > > > > + __be32 tidr; /* Interrupt Detect Register */
> > > > > > > + __be32 tiscr; /* Interrupt Site Capture
> Register */
> > > > > > > + __be32 ticscr; /* Interrupt Critical Site
> Capture
> > > > Register
> > > > > > */
> > > > > > > + u8 res1[0x10];
> > > > > > > + __be32 tmhtcrh; /* High Temperature Capture
> Register
> > > > */
> > > > > > > + __be32 tmhtcrl; /* Low Temperature Capture
> Register
> > > > */
> > > > > > > + u8 res2[0x8];
> > > > > > > + __be32 tmhtitr; /* High Temperature Immediate
> > > > Threshold */
> > > > > > > + __be32 tmhtatr; /* High Temperature Average
> Threshold
> > > > */
> > > > > > > + __be32 tmhtactr; /* High Temperature Average Crit
> Threshold
> > > > */
> > > > > > > + u8 res3[0x24];
> > > > > > > + __be32 ttcfgr; /* Temperature Configuration
> Register
> > > > */
> > > > > > > + __be32 tscfgr; /* Sensor Configuration
> Register */
> > > > > > > + u8 res4[0x78];
> > > > > > > + struct qoriq_tmu_site_regs site[SITES_MAX];
> > > > > > > + u8 res5[0x9f8];
> > > > > > > + __be32 ipbrr0; /* IP Block Revision Register 0
> */
> > > > > > > + __be32 ipbrr1; /* IP Block Revision Register 1
> */
> > > > > > > + u8 res6[0x310];
> > > > > > > + __be32 ttr0cr; /* Temperature Range 0 Control
> > > > Register */
> > > > > > > + __be32 ttr1cr; /* Temperature Range 1 Control
> > > > Register */
> > > > > > > + __be32 ttr2cr; /* Temperature Range 2 Control
> > > > Register */
> > > > > > > + __be32 ttr3cr; /* Temperature Range 3 Control
> > > > Register */
> > > > > > > +};
> > > > > > > +
> > > > > > > +/*
> > > > > > > + * Thermal zone data
> > > > > > > + */
> > > > > > > +struct qoriq_tmu_data {
> > > > > > > + struct thermal_zone_device *tz;
> > > > > > > + struct thermal_cooling_device *cdev;
> > > > > > > + enum thermal_device_mode mode;
> > > > > > > + unsigned long temp_passive;
> > > > > > > + unsigned long temp_critical;
> > > > > > > + struct qoriq_tmu_regs __iomem *regs; };
> > > > > > > +
> > > > > > > +static int tmu_get_mode(struct thermal_zone_device *tz,
> > > > > > > + enum thermal_device_mode *mode) {
> > > > > > > + struct qoriq_tmu_data *data = tz->devdata;
> > > > > > > +
> > > > > > > + *mode = data->mode;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_set_mode(struct thermal_zone_device *tz,
> > > > > > > + enum thermal_device_mode mode) {
> > > > > > > + struct qoriq_tmu_data *data = tz->devdata;
> > > > > > > +
> > > > > > > + if (mode == THERMAL_DEVICE_ENABLED) {
> > > > > > > + tz->polling_delay = TMU_POLLING_DELAY;
> > > > > > > + tz->passive_delay = TMU_PASSIVE_DELAY;
> > > > > > > + thermal_zone_device_update(tz);
> > > > > > > + } else {
> > > > > > > + tz->polling_delay = 0;
> > > > > > > + tz->passive_delay = 0;
> > > > > > > + }
> > > > > > > +
> > > > > > > + data->mode = mode;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_get_temp(struct thermal_zone_device *tz,
> > > > > > > +unsigned long
> > > > > > > +*temp) {
> > > > > > > + u8 val;
> > > > > > > + struct qoriq_tmu_data *data = tz->devdata;
> > > > > > > +
> > > > > > > + val = ioread32be(&data->regs->site[0].tritsr);
> > > > > > > + *temp = (unsigned long)val * 1000;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_get_trip_type(struct thermal_zone_device
> > > > > > > +*tz, int
> > > > trip,
> > > > > > > + enum thermal_trip_type *type) {
> > > > > > > + *type = (trip == TMU_TRIP_PASSIVE) ?
> THERMAL_TRIP_PASSIVE :
> > > > > > > + THERMAL_TRIP_CRITICAL;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_get_trip_temp(struct thermal_zone_device
> > > > > > > +*tz, int
> > > > trip,
> > > > > > > + unsigned long *temp) {
> > > > > > > + struct qoriq_tmu_data *data = tz->devdata;
> > > > > > > +
> > > > > > > + *temp = (trip == TMU_TRIP_PASSIVE) ? data-
> >temp_passive :
> > > > > > > + data->temp_critical;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_get_crit_temp(struct thermal_zone_device *tz,
> > > > > > > + unsigned long *temp) {
> > > > > > > + struct qoriq_tmu_data *data = tz->devdata;
> > > > > > > +
> > > > > > > + *temp = data->temp_critical;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_bind(struct thermal_zone_device *tz,
> > > > > > > + struct thermal_cooling_device *cdev) {
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + ret = thermal_zone_bind_cooling_device(tz,
> > > > > > > +TMU_TRIP_PASSIVE,
> > > > cdev,
> > > > > > > + THERMAL_NO_LIMIT,
> > > > > > > + THERMAL_NO_LIMIT,
> > > > > > > + THERMAL_WEIGHT_DEFAULT);
> > > > > > > + if (ret) {
> > > > > > > + dev_err(&tz->device,
> > > > > > > + "Binding zone %s with cdev %s failed:%d\n",
> > > > > > > + tz->type, cdev->type, ret);
> > > > > > > + }
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int tmu_unbind(struct thermal_zone_device *tz,
> > > > > > > + struct thermal_cooling_device *cdev) {
> > > > > > > + int ret;
> > > > > > > +
> > > > > > > + ret = thermal_zone_unbind_cooling_device(tz,
> > > > > > > +TMU_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;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int qoriq_tmu_calibration(struct platform_device
> *pdev) {
> > > > > > > + int i, val, len;
> > > > > > > + u32 range[4];
> > > > > > > + const __be32 *calibration;
> > > > > > > + struct device_node *node = pdev->dev.of_node;
> > > > > > > + struct qoriq_tmu_data *data = dev_get_drvdata(&pdev-
> >dev);
> > > > > > > +
> > > > > > > + /* Disable monitoring before calibration */
> > > > > > > + iowrite32be(TMR_DISABLE, &data->regs->tmr);
> > > > > > > +
> > > > > > > + if (of_property_read_u32_array(node, "fsl,tmu-range",
> > > > > > > +range,
> > > > 4))
> > > > > > > + return -1;
> > > > > > > +
> > > > > > > + /* Init temperature range registers */
> > > > > > > + iowrite32be(range[0], &data->regs->ttr0cr);
> > > > > > > + iowrite32be(range[1], &data->regs->ttr1cr);
> > > > > > > + iowrite32be(range[2], &data->regs->ttr2cr);
> > > > > > > + iowrite32be(range[3], &data->regs->ttr3cr);
> > > > > > > +
> > > > > > > + calibration = of_get_property(node, "fsl,tmu-
> calibration",
> > > > &len);
> > > > > > > + if (calibration == NULL)
> > > > > > > + return -1;
> > > > > > > +
> > > > > > > + for (i = 0; i < len; i += 8, calibration += 2) {
> > > > > > > + val = (int)of_read_number(calibration, 1);
> > > > > > > + iowrite32be(val, &data->regs->ttcfgr);
> > > > > > > + val = (int)of_read_number(calibration + 1, 1);
> > > > > > > + iowrite32be(val, &data->regs->tscfgr);
> > > > > > > + }
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static void qoriq_tmu_init_device(struct qoriq_tmu_data
> *data) {
> > > > > > > + /* Disable interrupt, using polling instead */
> > > > > > > + iowrite32be(TIER_DISABLE, &data->regs->tier);
> > > > > > > +
> > > > > > > + /* Set update_interval */
> > > > > > > + iowrite32be(TMTMIR_DEFAULT, &data->regs->tmtmir);
> > > > > > > +
> > > > > > > + /* Enable monitoring */
> > > > > > > + iowrite32be(TMR_ALL, &data->regs->tmr); }
> > > > > > > +
> > > > > > > +static struct thermal_zone_device_ops tmu_tz_ops = {
> > > > > > > + .bind = tmu_bind,
> > > > > > > + .unbind = tmu_unbind,
> > > > > > > + .get_temp = tmu_get_temp,
> > > > > > > + .get_mode = tmu_get_mode,
> > > > > > > + .set_mode = tmu_set_mode,
> > > > > > > + .get_trip_type = tmu_get_trip_type,
> > > > > > > + .get_trip_temp = tmu_get_trip_temp,
> > > > > > > + .get_crit_temp = tmu_get_crit_temp, };
> > > > > > > +
> > > > > > > +static int qoriq_tmu_probe(struct platform_device *pdev) {
> > > > > > > + int ret;
> > > > > > > + struct cpumask clip_cpus;
> > > > > > > + struct qoriq_tmu_data *data;
> > > > > > > +
> > > > > > > + if (!cpufreq_get_current_driver()) {
> > > > > > > + dev_dbg(&pdev->dev, "No cpufreq driver yet\n");
> > > > > > > + return -EPROBE_DEFER;
> > > > > > > + }
> > > > > > > +
> > > > > > > + if (!pdev->dev.of_node) {
> > > > > > > + dev_err(&pdev->dev, "Device OF-Node is NULL");
> > > > > > > + return -EFAULT;
> > > > > > > + }
> > > > > > > +
> > > > > > > + data = devm_kzalloc(&pdev->dev, sizeof(struct
> qoriq_tmu_data),
> > > > > > > + GFP_KERNEL);
> > > > > > > + if (!data)
> > > > > > > + return -ENOMEM;
> > > > > > > +
> > > > > > > + dev_set_drvdata(&pdev->dev, data);
> > > > > > > + data->regs = of_iomap(pdev->dev.of_node, 0);
> > > > > > > +
> > > > > > > + if (!data->regs) {
> > > > > > > + dev_err(&pdev->dev, "Failed to get memory
> region\n");
> > > > > > > + ret = -ENODEV;
> > > > > > > + goto err_iomap;
> > > > > > > + }
> > > > > > > +
> > > > > > > + ret = qoriq_tmu_calibration(pdev); /* TMU calibration
> */
> > > > > > > + if (ret < 0) {
> > > > > > > + dev_err(&pdev->dev, "TMU calibration failed.\n");
> > > > > > > + ret = -ENODEV;
> > > > > > > + goto err_iomap;
> > > > > > > + }
> > > > > > > +
> > > > > > > + qoriq_tmu_init_device(data); /* TMU initialization */
> > > > > > > +
> > > > > > > + cpumask_setall(&clip_cpus);
> > > > > > > + data->cdev = cpufreq_cooling_register(&clip_cpus);
> > > > > > > + if (IS_ERR(data->cdev)) {
> > > > > > > + ret = PTR_ERR(data->cdev);
> > > > > > > + dev_err(&data->cdev->device,
> > > > > > > + "Failed to register cpufreq cooling
> device: %d\n",
> > > > ret);
> > > > > > > + goto err_cooling;
> > > > > > > + }
> > > > > > > +
> > > > > > > + data->temp_passive = TMU_TEMP_PASSIVE;
> > > > > > > + data->temp_critical = TMU_TEMP_CRITICAL;
> > > > > > > + data->tz =
> > > > > > > +thermal_zone_device_register("tmu_thermal_zone",
> > > > > >
> > > > > > Any specific reason why not using OF thermal?
> > > > > >
> > > > > > > + TMU_TRIP_NUM,
> > > > > > > + 0, data,
> > > > > > > + &tmu_tz_ops, NULL,
> > > > > > > + TMU_PASSIVE_DELAY,
> > > > > > > + TMU_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);
> > > > > > > + goto err_thermal;
> > > > > > > + }
> > > > > > > +
> > > > > > > + data->mode = THERMAL_DEVICE_ENABLED;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +
> > > > > > > +err_thermal:
> > > > > > > + cpufreq_cooling_unregister(data->cdev);
> > > > > > > +
> > > > > > > +err_cooling:
> > > > > > > + iounmap(data->regs);
> > > > > > > +
> > > > > > > +err_iomap:
> > > > > > > + dev_set_drvdata(&pdev->dev, NULL);
> > > > > > > + devm_kfree(&pdev->dev, data);
> > > > > > > +
> > > > > > > + return ret;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int qoriq_tmu_remove(struct platform_device *pdev) {
> > > > > > > + struct qoriq_tmu_data *data = dev_get_drvdata(&pdev-
> >dev);
> > > > > > > +
> > > > > > > + /* Disable monitoring */
> > > > > > > + iowrite32be(TMR_DISABLE, &data->regs->tmr);
> > > > > > > +
> > > > > > > + thermal_zone_device_unregister(data->tz);
> > > > > > > + cpufreq_cooling_unregister(data->cdev);
> > > > > > > + iounmap(data->regs);
> > > > > > > +
> > > > > > > + dev_set_drvdata(&pdev->dev, NULL);
> > > > > > > + devm_kfree(&pdev->dev, data);
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +#ifdef CONFIG_PM_SLEEP
> > > > > > > +static int qoriq_tmu_suspend(struct device *dev) {
> > > > > > > + struct qoriq_tmu_data *data = dev_get_drvdata(dev);
> > > > > > > +
> > > > > > > + /* Disable monitoring */
> > > > > > > + iowrite32be(TMR_DISABLE, &data->regs->tmr);
> > > > > > > + data->mode = THERMAL_DEVICE_DISABLED;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +
> > > > > > > +static int qoriq_tmu_resume(struct device *dev) {
> > > > > > > + struct qoriq_tmu_data *data = dev_get_drvdata(dev);
> > > > > > > +
> > > > > > > + /* Enable monitoring */
> > > > > > > + iowrite32be(TMR_ALL, &data->regs->tmr);
> > > > > > > + data->mode = THERMAL_DEVICE_ENABLED;
> > > > > > > +
> > > > > > > + return 0;
> > > > > > > +}
> > > > > > > +#endif
> > > > > > > +
> > > > > > > +static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
> > > > > > > + qoriq_tmu_suspend, qoriq_tmu_resume);
> > > > > > > +
> > > > > > > +static const struct of_device_id qoriq_tmu_match[] = {
> > > > > > > + { .compatible = "fsl,qoriq-tmu", },
> > > > > > > + {},
> > > > > > > +};
> > > > > > > +
> > > > > > > +static struct platform_driver qoriq_tmu = {
> > > > > > > + .driver = {
> > > > > > > + .owner = THIS_MODULE,
> > > > > > > + .name = "qoriq_thermal",
> > > > > > > + .pm = &qoriq_tmu_pm_ops,
> > > > > > > + .of_match_table = qoriq_tmu_match,
> > > > > > > + },
> > > > > > > + .probe = qoriq_tmu_probe,
> > > > > > > + .remove = qoriq_tmu_remove,
> > > > > > > +};
> > > > > > > +module_platform_driver(qoriq_tmu);
> > > > > > > +
> > > > > > > +MODULE_AUTHOR("Jia Hongtao <hongtao....@freescale.com>");
> > > > > > > +MODULE_DESCRIPTION("Freescale QorIQ Thermal Monitoring Unit
> > > > > > > +driver"); MODULE_LICENSE("GPL v2");
> > > > > > > --
> > > > > > > 2.1.0.27.g96db324
> > > > > > >
> > > _______________________________________________
> > > Linuxppc-dev mailing list
> > > Linuxppc-dev@lists.ozlabs.org
> > > https://lists.ozlabs.org/listinfo/linuxppc-dev
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