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Date: Mon, 13 Mar 2023 11:55:06 +0100
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: rafael@...nel.org, rui.zhang@...el.com
Cc: 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
Hi,
is this code removal acceptable ?
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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