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HID: rmi: Disable scanning if the device is not a wake source
Some touchpads are configured with firmware which continues to scan for fingers at a minimal scan rate even after receiving the HID power sleep command. This allows a finger touching the touchpad to genrate a wake event. This patch ensures that scanning is disabled if the touchpad is not a wake source and ensures scanning is enabled on resume. Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
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67db8a8086
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0925636042
1 changed files with 55 additions and 1 deletions
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@ -33,6 +33,9 @@
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#define RMI_READ_DATA_PENDING 1
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#define RMI_STARTED 2
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#define RMI_SLEEP_NORMAL 0x0
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#define RMI_SLEEP_DEEP_SLEEP 0x1
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/* device flags */
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#define RMI_DEVICE BIT(0)
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#define RMI_DEVICE_HAS_PHYS_BUTTONS BIT(1)
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@ -126,6 +129,8 @@ struct rmi_data {
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unsigned long device_flags;
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unsigned long firmware_id;
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u8 f01_ctrl0;
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};
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#define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
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@ -532,9 +537,51 @@ static int rmi_event(struct hid_device *hdev, struct hid_field *field,
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}
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#ifdef CONFIG_PM
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static int rmi_set_sleep_mode(struct hid_device *hdev, int sleep_mode)
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{
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struct rmi_data *data = hid_get_drvdata(hdev);
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int ret;
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u8 f01_ctrl0;
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f01_ctrl0 = (data->f01_ctrl0 & ~0x3) | sleep_mode;
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ret = rmi_write(hdev, data->f01.control_base_addr,
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&f01_ctrl0);
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if (ret) {
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hid_err(hdev, "can not write sleep mode\n");
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return ret;
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}
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return 0;
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}
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static int rmi_suspend(struct hid_device *hdev, pm_message_t message)
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{
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if (!device_may_wakeup(hdev->dev.parent))
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return rmi_set_sleep_mode(hdev, RMI_SLEEP_DEEP_SLEEP);
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return 0;
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}
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static int rmi_post_reset(struct hid_device *hdev)
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{
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return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
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int ret;
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ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
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if (ret) {
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hid_err(hdev, "can not set rmi mode\n");
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return ret;
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}
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if (!device_may_wakeup(hdev->dev.parent)) {
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ret = rmi_set_sleep_mode(hdev, RMI_SLEEP_NORMAL);
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if (ret) {
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hid_err(hdev, "can not write sleep mode\n");
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return ret;
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}
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}
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return ret;
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}
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static int rmi_post_resume(struct hid_device *hdev)
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@ -732,6 +779,12 @@ static int rmi_populate_f01(struct hid_device *hdev)
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data->firmware_id += info[2] * 65536;
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}
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ret = rmi_read(hdev, data->f01.control_base_addr, &data->f01_ctrl0);
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if (ret) {
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hid_err(hdev, "can not read f01 ctrl0\n");
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return ret;
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}
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return 0;
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}
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@ -1273,6 +1326,7 @@ static struct hid_driver rmi_driver = {
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.input_mapping = rmi_input_mapping,
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.input_configured = rmi_input_configured,
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#ifdef CONFIG_PM
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.suspend = rmi_suspend,
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.resume = rmi_post_resume,
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.reset_resume = rmi_post_reset,
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#endif
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