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Date: Wed, 21 Mar 2018 10:38:07 +0100
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: Gwendal Grignou <gwendal@...omium.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Benson Leung <bleung@...omium.org>,
Guenter Roeck <groeck@...omium.org>,
Andy Shevchenko <andy.shevchenko@...il.com>,
kernel@...labora.com, Linux Kernel <linux-kernel@...r.kernel.org>,
Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v3 6/6] platform/chrome: mfd/cros_ec_dev: Add sysfs entry
to set keyboard wake lid angle
Hi,
On 20/03/18 19:53, Gwendal Grignou wrote:
> On Tue, Mar 20, 2018 at 8:51 AM, Enric Balletbo i Serra
> <enric.balletbo@...labora.com> wrote:
>> From: Gwendal Grignou <gwendal@...omium.org>
>>
>> This adds a sysfs attribute (/sys/class/chromeos/cros_ec/kb_wake_angle)
>> used to set and get the keyboard wake lid angle. This attribute is
>> present only if 2 accelerometers are controlled by the EC.
>>
>> This patch also moves the cros_ec features check before the device is
>> added so the features map obtained from the EC is ready on time.
>>
>> Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
>> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
>> ---
>>
>> Changes in v3:
>> - [6/6] Add Reviewed-by Andy Shevchenko
>> - [6/6] Fix the code that has_kb_wake_angle in cros_ec_sensors_register().
>>
>> Changes in v2:
>> - [6/6] Use DEVICE_ATTR_RW variant.
>> - [6/6] Use one line when fits in 80 characters.
>> - [6/6] Use the previous defined to_cros_ec_dev
>>
>> drivers/mfd/cros_ec_dev.c | 29 +++++-------
>> drivers/platform/chrome/cros_ec_sysfs.c | 81 +++++++++++++++++++++++++++++++++
>> include/linux/mfd/cros_ec.h | 2 +
>> 3 files changed, 95 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
>> index e4fafdd96e5e..ceaff1cf2f65 100644
>> --- a/drivers/mfd/cros_ec_dev.c
>> +++ b/drivers/mfd/cros_ec_dev.c
>> @@ -305,7 +305,7 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
>>
>> resp = (struct ec_response_motion_sense *)msg->data;
>> sensor_num = resp->dump.sensor_count;
>> - /* Allocate 2 extra sensors in case lid angle or FIFO are needed */
>> + /* Allocate 1 extra sensors in FIFO are needed */
>> sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2),
> Should be +1 instead of +2 to match the comment.
Oh, right, my bad. Guess makes sense send a v4 with that fixed. I'll wait one
day for if there is something else and send a v4.
Regards,
Enric
>> GFP_KERNEL);
>> if (sensor_cells == NULL)
>> @@ -362,16 +362,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
>> sensor_type[resp->info.type]++;
>> id++;
>> }
>> - if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2) {
>> - sensor_platforms[id].sensor_num = sensor_num;
>>
>> - sensor_cells[id].name = "cros-ec-angle";
>> - sensor_cells[id].id = 0;
>> - sensor_cells[id].platform_data = &sensor_platforms[id];
>> - sensor_cells[id].pdata_size =
>> - sizeof(struct cros_ec_sensor_platform);
>> - id++;
>> - }
>> + if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2)
>> + ec->has_kb_wake_angle = true;
>> +
>> if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
>> sensor_cells[id].name = "cros-ec-ring";
>> id++;
>> @@ -424,6 +418,14 @@ static int ec_device_probe(struct platform_device *pdev)
>> goto failed;
>> }
>>
>> + /* check whether this EC is a sensor hub. */
>> + if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
>> + cros_ec_sensors_register(ec);
>> +
>> + /* Take control of the lightbar from the EC. */
>> + lb_manual_suspend_ctrl(ec, 1);
>> +
>> + /* We can now add the sysfs class, we know which parameter to show */
>> retval = cdev_device_add(&ec->cdev, &ec->class_dev);
>> if (retval) {
>> dev_err(dev, "cdev_device_add failed => %d\n", retval);
>> @@ -433,13 +435,6 @@ static int ec_device_probe(struct platform_device *pdev)
>> if (cros_ec_debugfs_init(ec))
>> dev_warn(dev, "failed to create debugfs directory\n");
>>
>> - /* check whether this EC is a sensor hub. */
>> - if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
>> - cros_ec_sensors_register(ec);
>> -
>> - /* Take control of the lightbar from the EC. */
>> - lb_manual_suspend_ctrl(ec, 1);
>> -
>> return 0;
>>
>> failed:
>> diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c
>> index 78ae0d3760e4..5a6db3fe213a 100644
>> --- a/drivers/platform/chrome/cros_ec_sysfs.c
>> +++ b/drivers/platform/chrome/cros_ec_sysfs.c
>> @@ -258,21 +258,102 @@ static ssize_t flashinfo_show(struct device *dev,
>> return ret;
>> }
>>
>> +/* Keyboard wake angle control */
>> +static ssize_t kb_wake_angle_show(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);
>> + struct ec_response_motion_sense *resp;
>> + struct ec_params_motion_sense *param;
>> + struct cros_ec_command *msg;
>> + int ret;
>> +
>> + msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
>> + if (!msg)
>> + return -ENOMEM;
>> +
>> + param = (struct ec_params_motion_sense *)msg->data;
>> + msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
>> + msg->version = 2;
>> + param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
>> + param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
>> + msg->outsize = sizeof(*param);
>> + msg->insize = sizeof(*resp);
>> +
>> + ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
>> + if (ret < 0)
>> + goto exit;
>> +
>> + resp = (struct ec_response_motion_sense *)msg->data;
>> + ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
>> +exit:
>> + kfree(msg);
>> + return ret;
>> +}
>> +
>> +static ssize_t kb_wake_angle_store(struct device *dev,
>> + struct device_attribute *attr,
>> + const char *buf, size_t count)
>> +{
>> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);
>> + struct ec_params_motion_sense *param;
>> + struct cros_ec_command *msg;
>> + u16 angle;
>> + int ret;
>> +
>> + ret = kstrtou16(buf, 0, &angle);
>> + if (ret)
>> + return ret;
>> +
>> + msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
>> + if (!msg)
>> + return -ENOMEM;
>> +
>> + param = (struct ec_params_motion_sense *)msg->data;
>> + msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
>> + msg->version = 2;
>> + param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
>> + param->kb_wake_angle.data = angle;
>> + msg->outsize = sizeof(*param);
>> + msg->insize = sizeof(struct ec_response_motion_sense);
>> +
>> + ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
>> + kfree(msg);
>> + if (ret < 0)
>> + return ret;
>> + return count;
>> +}
>> +
>> /* Module initialization */
>>
>> static DEVICE_ATTR_RW(reboot);
>> static DEVICE_ATTR_RO(version);
>> static DEVICE_ATTR_RO(flashinfo);
>> +static DEVICE_ATTR_RW(kb_wake_angle);
>>
>> static struct attribute *__ec_attrs[] = {
>> + &dev_attr_kb_wake_angle.attr,
>> &dev_attr_reboot.attr,
>> &dev_attr_version.attr,
>> &dev_attr_flashinfo.attr,
>> NULL,
>> };
>>
>> +static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
>> + struct attribute *a, int n)
>> +{
>> + struct device *dev = container_of(kobj, struct device, kobj);
>> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);
>> +
>> + if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
>> + return 0;
>> +
>> + return a->mode;
>> +}
>> +
>> struct attribute_group cros_ec_attr_group = {
>> .attrs = __ec_attrs,
>> + .is_visible = cros_ec_ctrl_visible,
>> };
>> EXPORT_SYMBOL(cros_ec_attr_group);
>>
>> diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
>> index c61535979b8f..2d4e23c9ea0a 100644
>> --- a/include/linux/mfd/cros_ec.h
>> +++ b/include/linux/mfd/cros_ec.h
>> @@ -183,6 +183,7 @@ struct cros_ec_debugfs;
>> * @ec_dev: cros_ec_device structure to talk to the physical device
>> * @dev: pointer to the platform device
>> * @debug_info: cros_ec_debugfs structure for debugging information
>> + * @has_kb_wake_angle: true if at least 2 accelerometer are connected to the EC.
>> * @cmd_offset: offset to apply for each command.
>> */
>> struct cros_ec_dev {
>> @@ -191,6 +192,7 @@ struct cros_ec_dev {
>> struct cros_ec_device *ec_dev;
>> struct device *dev;
>> struct cros_ec_debugfs *debug_info;
>> + bool has_kb_wake_angle;
>> u16 cmd_offset;
>> u32 features[2];
>> };
>> --
>> 2.16.2
>>
> <div class="gmail_extra"><br><div class="gmail_quote">On Tue, Mar 20,
> 2018 at 8:51 AM, Enric Balletbo i Serra <span dir="ltr"><<a
> href="mailto:enric.balletbo@...labora.com"
> target="_blank">enric.balletbo@...labora.com</a>></span>
> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0
> .8ex;border-left:1px #ccc solid;padding-left:1ex">From: Gwendal
> Grignou <<a href="mailto:gwendal@...omium.org">gwendal@...omium.org</a>><br>
> <br>
> This adds a sysfs attribute (/sys/class/chromeos/cros_ec/<wbr>kb_wake_angle)<br>
> used to set and get the keyboard wake lid angle. This attribute is<br>
> present only if 2 accelerometers are controlled by the EC.<br>
> <br>
> This patch also moves the cros_ec features check before the device is<br>
> added so the features map obtained from the EC is ready on time.<br>
> <br>
> Signed-off-by: Gwendal Grignou <<a
> href="mailto:gwendal@...omium.org">gwendal@...omium.org</a>><br>
> Signed-off-by: Enric Balletbo i Serra <<a
> href="mailto:enric.balletbo@...labora.com">enric.balletbo@...labora.com</a>><br>
> Reviewed-by: Andy Shevchenko <<a
> href="mailto:andy.shevchenko@...il.com">andy.shevchenko@...il.com</a>><br>
> ---<br>
> <br>
> Changes in v3:<br>
> - [6/6] Add Reviewed-by Andy Shevchenko<br>
> - [6/6] Fix the code that has_kb_wake_angle in cros_ec_sensors_register().<br>
> <br>
> Changes in v2:<br>
> - [6/6] Use DEVICE_ATTR_RW variant.<br>
> - [6/6] Use one line when fits in 80 characters.<br>
> - [6/6] Use the previous defined to_cros_ec_dev<br>
> <br>
> drivers/mfd/cros_ec_dev.c
> | 29 +++++-------<br>
> drivers/platform/chrome/cros_<wbr>ec_sysfs.c | 81
> ++++++++++++++++++++++++++++++<wbr>+++<br>
> include/linux/mfd/cros_ec.h
> | 2 +<br>
> 3 files changed, 95 insertions(+), 17 deletions(-)<br>
> <br>
> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c<br>
> index e4fafdd96e5e..ceaff1cf2f65 100644<br>
> --- a/drivers/mfd/cros_ec_dev.c<br>
> +++ b/drivers/mfd/cros_ec_dev.c<br>
> @@ -305,7 +305,7 @@ static void cros_ec_sensors_register(<wbr>struct
> cros_ec_dev *ec)<br>
> <br>
> resp = (struct ec_response_motion_sense
> *)msg->data;<br>
> sensor_num = resp->dump.sensor_count;<br>
> - /* Allocate 2 extra sensors in case lid
> angle or FIFO are needed */<br>
> + /* Allocate 1 extra sensors in FIFO are
> needed */<br>
> sensor_cells = kzalloc(sizeof(struct
> mfd_cell) * (sensor_num + 2),<br>
>
> GFP_KERNEL);<br>
> if (sensor_cells == NULL)<br>
> @@ -362,16 +362,10 @@ static void cros_ec_sensors_register(<wbr>struct
> cros_ec_dev *ec)<br>
>
> sensor_type[resp->info.type]++<wbr>;<br>
> id++;<br>
> }<br>
> - if
> (sensor_type[MOTIONSENSE_TYPE_<wbr>ACCEL] >= 2) {<br>
> -
> sensor_platforms[id].sensor_<wbr>num = sensor_num;<br>
> <br>
> -
> sensor_cells[id].name = "cros-ec-angle";<br>
> -
> sensor_cells[id].id = 0;<br>
> -
> sensor_cells[id].platform_data = &sensor_platforms[id];<br>
> -
> sensor_cells[id].pdata_size =<br>
> -
> sizeof(struct cros_ec_sensor_platform);<br>
> - id++;<br>
> - }<br>
> + if
> (sensor_type[MOTIONSENSE_TYPE_<wbr>ACCEL] >= 2)<br>
> +
> ec->has_kb_wake_angle = true;<br>
> +<br>
> if (cros_ec_check_features(ec,
> EC_FEATURE_MOTION_SENSE_FIFO)) {<br>
>
> sensor_cells[id].name = "cros-ec-ring";<br>
> id++;<br>
> @@ -424,6 +418,14 @@ static int ec_device_probe(struct platform_device
> *pdev)<br>
> goto failed;<br>
> }<br>
> <br>
> + /* check whether this EC is a sensor hub. */<br>
> + if (cros_ec_check_features(ec,
> EC_FEATURE_MOTION_SENSE))<br>
> +
> cros_ec_sensors_register(ec);<br>
> +<br>
> + /* Take control of the lightbar from the EC. */<br>
> + lb_manual_suspend_ctrl(ec, 1);<br>
> +<br>
> + /* We can now add the sysfs class, we know
> which parameter to show */<br>
> retval = cdev_device_add(&ec->cdev,
> &ec->class_dev);<br>
> if (retval) {<br>
> dev_err(dev,
> "cdev_device_add failed => %d\n", retval);<br>
> @@ -433,13 +435,6 @@ static int ec_device_probe(struct platform_device
> *pdev)<br>
> if (cros_ec_debugfs_init(ec))<br>
> dev_warn(dev,
> "failed to create debugfs directory\n");<br>
> <br>
> - /* check whether this EC is a sensor hub. */<br>
> - if (cros_ec_check_features(ec,
> EC_FEATURE_MOTION_SENSE))<br>
> -
> cros_ec_sensors_register(ec);<br>
> -<br>
> - /* Take control of the lightbar from the EC. */<br>
> - lb_manual_suspend_ctrl(ec, 1);<br>
> -<br>
> return 0;<br>
> <br>
> failed:<br>
> diff --git a/drivers/platform/chrome/<wbr>cros_ec_sysfs.c
> b/drivers/platform/chrome/<wbr>cros_ec_sysfs.c<br>
> index 78ae0d3760e4..5a6db3fe213a 100644<br>
> --- a/drivers/platform/chrome/<wbr>cros_ec_sysfs.c<br>
> +++ b/drivers/platform/chrome/<wbr>cros_ec_sysfs.c<br>
> @@ -258,21 +258,102 @@ static ssize_t flashinfo_show(struct device *dev,<br>
> return ret;<br>
> }<br>
> <br>
> +/* Keyboard wake angle control */<br>
> +static ssize_t kb_wake_angle_show(struct device *dev,<br>
> +
> struct
> device_attribute *attr, char *buf)<br>
> +{<br>
> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);<br>
> + struct ec_response_motion_sense *resp;<br>
> + struct ec_params_motion_sense *param;<br>
> + struct cros_ec_command *msg;<br>
> + int ret;<br>
> +<br>
> + msg = kmalloc(sizeof(*msg) +
> EC_HOST_PARAM_SIZE, GFP_KERNEL);<br>
> + if (!msg)<br>
> + return -ENOMEM;<br>
> +<br>
> + param = (struct ec_params_motion_sense
> *)msg->data;<br>
> + msg->command = EC_CMD_MOTION_SENSE_CMD
> + ec->cmd_offset;<br>
> + msg->version = 2;<br>
> + param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;<br>
> + param->kb_wake_angle.data =
> EC_MOTION_SENSE_NO_VALUE;<br>
> + msg->outsize = sizeof(*param);<br>
> + msg->insize = sizeof(*resp);<br>
> +<br>
> + ret =
> cros_ec_cmd_xfer_status(ec-><wbr>ec_dev, msg);<br>
> + if (ret < 0)<br>
> + goto exit;<br>
> +<br>
> + resp = (struct ec_response_motion_sense
> *)msg->data;<br>
> + ret = scnprintf(buf, PAGE_SIZE, "%d\n",
> resp->kb_wake_angle.ret);<br>
> +exit:<br>
> + kfree(msg);<br>
> + return ret;<br>
> +}<br>
> +<br>
> +static ssize_t kb_wake_angle_store(struct device *dev,<br>
> +
> struct
> device_attribute *attr,<br>
> +
> const char *buf,
> size_t count)<br>
> +{<br>
> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);<br>
> + struct ec_params_motion_sense *param;<br>
> + struct cros_ec_command *msg;<br>
> + u16 angle;<br>
> + int ret;<br>
> +<br>
> + ret = kstrtou16(buf, 0, &angle);<br>
> + if (ret)<br>
> + return ret;<br>
> +<br>
> + msg = kmalloc(sizeof(*msg) +
> EC_HOST_PARAM_SIZE, GFP_KERNEL);<br>
> + if (!msg)<br>
> + return -ENOMEM;<br>
> +<br>
> + param = (struct ec_params_motion_sense
> *)msg->data;<br>
> + msg->command = EC_CMD_MOTION_SENSE_CMD
> + ec->cmd_offset;<br>
> + msg->version = 2;<br>
> + param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;<br>
> + param->kb_wake_angle.data = angle;<br>
> + msg->outsize = sizeof(*param);<br>
> + msg->insize = sizeof(struct
> ec_response_motion_sense);<br>
> +<br>
> + ret =
> cros_ec_cmd_xfer_status(ec-><wbr>ec_dev, msg);<br>
> + kfree(msg);<br>
> + if (ret < 0)<br>
> + return ret;<br>
> + return count;<br>
> +}<br>
> +<br>
> /* Module initialization */<br>
> <br>
> static DEVICE_ATTR_RW(reboot);<br>
> static DEVICE_ATTR_RO(version);<br>
> static DEVICE_ATTR_RO(flashinfo);<br>
> +static DEVICE_ATTR_RW(kb_wake_angle);<br>
> <br>
> static struct attribute *__ec_attrs[] = {<br>
> + &dev_attr_kb_wake_angle.attr,<br>
> &dev_attr_reboot.attr,<br>
> &dev_attr_version.attr,<br>
> &dev_attr_flashinfo.attr,<br>
> NULL,<br>
> };<br>
> <br>
> +static umode_t cros_ec_ctrl_visible(struct kobject *kobj,<br>
> +
> struct
> attribute *a, int n)<br>
> +{<br>
> + struct device *dev = container_of(kobj,
> struct device, kobj);<br>
> + struct cros_ec_dev *ec = to_cros_ec_dev(dev);<br>
> +<br>
> + if (a == &dev_attr_kb_wake_angle.attr
> && !ec->has_kb_wake_angle)<br>
> + return 0;<br>
> +<br>
> + return a->mode;<br>
> +}<br>
> +<br>
> struct attribute_group cros_ec_attr_group = {<br>
> .attrs = __ec_attrs,<br>
> + .is_visible = cros_ec_ctrl_visible,<br>
> };<br>
> EXPORT_SYMBOL(cros_ec_attr_<wbr>group);<br>
> <br>
> diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h<br>
> index c61535979b8f..2d4e23c9ea0a 100644<br>
> --- a/include/linux/mfd/cros_ec.h<br>
> +++ b/include/linux/mfd/cros_ec.h<br>
> @@ -183,6 +183,7 @@ struct cros_ec_debugfs;<br>
> * @ec_dev: cros_ec_device structure to talk to the physical device<br>
> * @dev: pointer to the platform device<br>
> * @debug_info: cros_ec_debugfs structure for debugging information<br>
> + * @has_kb_wake_angle: true if at least 2 accelerometer are connected
> to the EC.<br>
> * @cmd_offset: offset to apply for each command.<br>
> */<br>
> struct cros_ec_dev {<br>
> @@ -191,6 +192,7 @@ struct cros_ec_dev {<br>
> struct cros_ec_device *ec_dev;<br>
> struct device *dev;<br>
> struct cros_ec_debugfs *debug_info;<br>
> + bool has_kb_wake_angle;<br>
> u16 cmd_offset;<br>
> u32 features[2];<br>
> };<br>
> <span class="HOEnZb"><font color="#888888">--<br>
> 2.16.2<br>
> <br>
> </font></span></blockquote></div><br></div>
>
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