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Message-ID: <CAJZ5v0iYk7mC0K7Tsv7Dh9N=dQW151YhVcphvLm7T2vEY10tMA@mail.gmail.com>
Date: Mon, 13 Mar 2023 13:26:23 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: rafael@...nel.org, rui.zhang@...el.com, amitk@...nel.org,
Sujith Thomas <sujith.thomas@...el.com>,
"open list:INTEL MENLOW THERMAL DRIVER" <linux-pm@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 03/11] thermal/drivers/intel_menlow: Remove add_one_attribute
On Mon, Mar 13, 2023 at 11:55 AM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
>
> Hi,
>
> is this code removal acceptable ?
I'll let you know later this week.
> On 07/03/2023 14:37, Daniel Lezcano wrote:
> > The driver hooks the thermal framework sysfs to add some driver
> > specific information. A debatable approach as that may belong the
> > device sysfs directory, not the thermal zone directory.
> >
> > As the driver is accessing the thermal internals, we should provide at
> > least an API to the thermal framework to add an attribute to the
> > existing sysfs thermal zone entry.
> >
> > Before doing that and given the age of the driver (2008) may be it is
> > worth to double check if these attributes are really needed. So my
> > first proposal is to remove them if that does not hurt.
> >
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>
>
>
> > ---
> > drivers/thermal/intel/intel_menlow.c | 193 ---------------------------
> > 1 file changed, 193 deletions(-)
> >
> > diff --git a/drivers/thermal/intel/intel_menlow.c b/drivers/thermal/intel/intel_menlow.c
> > index 5a6ad0552311..5a9738a93083 100644
> > --- a/drivers/thermal/intel/intel_menlow.c
> > +++ b/drivers/thermal/intel/intel_menlow.c
> > @@ -230,174 +230,8 @@ struct intel_menlow_attribute {
> > static LIST_HEAD(intel_menlow_attr_list);
> > static DEFINE_MUTEX(intel_menlow_attr_lock);
> >
> > -/*
> > - * sensor_get_auxtrip - get the current auxtrip value from sensor
> > - * @handle: Object handle
> > - * @index : GET_AUX1/GET_AUX0
> > - * @value : The address will be fill by the value
> > - */
> > -static int sensor_get_auxtrip(acpi_handle handle, int index,
> > - unsigned long long *value)
> > -{
> > - acpi_status status;
> > -
> > - if ((index != 0 && index != 1) || !value)
> > - return -EINVAL;
> > -
> > - status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
> > - NULL, value);
> > - if (ACPI_FAILURE(status))
> > - return -EIO;
> > -
> > - return 0;
> > -}
> > -
> > -/*
> > - * sensor_set_auxtrip - set the new auxtrip value to sensor
> > - * @handle: Object handle
> > - * @index : GET_AUX1/GET_AUX0
> > - * @value : The value will be set
> > - */
> > -static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
> > -{
> > - acpi_status status;
> > - union acpi_object arg = {
> > - ACPI_TYPE_INTEGER
> > - };
> > - struct acpi_object_list args = {
> > - 1, &arg
> > - };
> > - unsigned long long temp;
> > -
> > - if (index != 0 && index != 1)
> > - return -EINVAL;
> > -
> > - status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
> > - NULL, &temp);
> > - if (ACPI_FAILURE(status))
> > - return -EIO;
> > - if ((index && value < temp) || (!index && value > temp))
> > - return -EINVAL;
> > -
> > - arg.integer.value = value;
> > - status = acpi_evaluate_integer(handle, index ? SET_AUX1 : SET_AUX0,
> > - &args, &temp);
> > - if (ACPI_FAILURE(status))
> > - return -EIO;
> > -
> > - /* do we need to check the return value of SAX0/SAX1 ? */
> > -
> > - return 0;
> > -}
> > -
> > -#define to_intel_menlow_attr(_attr) \
> > - container_of(_attr, struct intel_menlow_attribute, attr)
> > -
> > -static ssize_t aux_show(struct device *dev, struct device_attribute *dev_attr,
> > - char *buf, int idx)
> > -{
> > - struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
> > - unsigned long long value;
> > - int result;
> > -
> > - result = sensor_get_auxtrip(attr->handle, idx, &value);
> > - if (result)
> > - return result;
> > -
> > - return sprintf(buf, "%lu", deci_kelvin_to_celsius(value));
> > -}
> > -
> > -static ssize_t aux0_show(struct device *dev,
> > - struct device_attribute *dev_attr, char *buf)
> > -{
> > - return aux_show(dev, dev_attr, buf, 0);
> > -}
> > -
> > -static ssize_t aux1_show(struct device *dev,
> > - struct device_attribute *dev_attr, char *buf)
> > -{
> > - return aux_show(dev, dev_attr, buf, 1);
> > -}
> > -
> > -static ssize_t aux_store(struct device *dev, struct device_attribute *dev_attr,
> > - const char *buf, size_t count, int idx)
> > -{
> > - struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
> > - int value;
> > - int result;
> > -
> > - /*Sanity check; should be a positive integer */
> > - if (!sscanf(buf, "%d", &value))
> > - return -EINVAL;
> > -
> > - if (value < 0)
> > - return -EINVAL;
> > -
> > - result = sensor_set_auxtrip(attr->handle, idx,
> > - celsius_to_deci_kelvin(value));
> > - return result ? result : count;
> > -}
> > -
> > -static ssize_t aux0_store(struct device *dev,
> > - struct device_attribute *dev_attr,
> > - const char *buf, size_t count)
> > -{
> > - return aux_store(dev, dev_attr, buf, count, 0);
> > -}
> > -
> > -static ssize_t aux1_store(struct device *dev,
> > - struct device_attribute *dev_attr,
> > - const char *buf, size_t count)
> > -{
> > - return aux_store(dev, dev_attr, buf, count, 1);
> > -}
> > -
> > /* BIOS can enable/disable the thermal user application in dabney platform */
> > #define BIOS_ENABLED "\\_TZ.GSTS"
> > -static ssize_t bios_enabled_show(struct device *dev,
> > - struct device_attribute *attr, char *buf)
> > -{
> > - acpi_status status;
> > - unsigned long long bios_enabled;
> > -
> > - status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &bios_enabled);
> > - if (ACPI_FAILURE(status))
> > - return -ENODEV;
> > -
> > - return sprintf(buf, "%s\n", bios_enabled ? "enabled" : "disabled");
> > -}
> > -
> > -static int intel_menlow_add_one_attribute(char *name, umode_t mode, void *show,
> > - void *store, struct device *dev,
> > - acpi_handle handle)
> > -{
> > - struct intel_menlow_attribute *attr;
> > - int result;
> > -
> > - attr = kzalloc(sizeof(struct intel_menlow_attribute), GFP_KERNEL);
> > - if (!attr)
> > - return -ENOMEM;
> > -
> > - sysfs_attr_init(&attr->attr.attr); /* That is consistent naming :D */
> > - attr->attr.attr.name = name;
> > - attr->attr.attr.mode = mode;
> > - attr->attr.show = show;
> > - attr->attr.store = store;
> > - attr->device = dev;
> > - attr->handle = handle;
> > -
> > - result = device_create_file(dev, &attr->attr);
> > - if (result) {
> > - kfree(attr);
> > - return result;
> > - }
> > -
> > - mutex_lock(&intel_menlow_attr_lock);
> > - list_add_tail(&attr->node, &intel_menlow_attr_list);
> > - mutex_unlock(&intel_menlow_attr_lock);
> > -
> > - return 0;
> > -}
> >
> > static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
> > void *context, void **rv)
> > @@ -420,12 +254,6 @@ static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
> > if (ACPI_FAILURE(status))
> > return (status == AE_NOT_FOUND) ? AE_OK : status;
> >
> > - result = intel_menlow_add_one_attribute("aux0", 0644,
> > - aux0_show, aux0_store,
> > - &thermal->device, handle);
> > - if (result)
> > - return AE_ERROR;
> > -
> > status = acpi_get_handle(handle, GET_AUX1, &dummy);
> > if (ACPI_FAILURE(status))
> > goto aux1_not_found;
> > @@ -434,27 +262,6 @@ static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
> > if (ACPI_FAILURE(status))
> > goto aux1_not_found;
> >
> > - result = intel_menlow_add_one_attribute("aux1", 0644,
> > - aux1_show, aux1_store,
> > - &thermal->device, handle);
> > - if (result) {
> > - intel_menlow_unregister_sensor();
> > - return AE_ERROR;
> > - }
> > -
> > - /*
> > - * create the "dabney_enabled" attribute which means the user app
> > - * should be loaded or not
> > - */
> > -
> > - result = intel_menlow_add_one_attribute("bios_enabled", 0444,
> > - bios_enabled_show, NULL,
> > - &thermal->device, handle);
> > - if (result) {
> > - intel_menlow_unregister_sensor();
> > - return AE_ERROR;
> > - }
> > -
> > return AE_OK;
> >
> > aux1_not_found:
>
> --
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