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HID: rmi: Add functions for writing to registers 

Writing to registers is needed for setting configuration parameters.

Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Tested-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Andrew Duggan 2015-02-24 17:36:48 -08:00 committed by Jiri Kosina
parent 70e003f75f
commit dd8df28459
1 changed files with 40 additions and 0 deletions
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40
drivers/hid/hid-rmi.c
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@ -274,6 +274,46 @@ static inline int rmi_read(struct hid_device *hdev, u16 addr, void *buf)
return rmi_read_block(hdev, addr, buf, 1);
}
static int rmi_write_block(struct hid_device *hdev, u16 addr, void *buf,
const int len)
{
struct rmi_data *data = hid_get_drvdata(hdev);
int ret;
mutex_lock(&data->page_mutex);
if (RMI_PAGE(addr) != data->page) {
ret = rmi_set_page(hdev, RMI_PAGE(addr));
if (ret < 0)
goto exit;
}
data->writeReport[0] = RMI_WRITE_REPORT_ID;
data->writeReport[1] = len;
data->writeReport[2] = addr & 0xFF;
data->writeReport[3] = (addr >> 8) & 0xFF;
memcpy(&data->writeReport[4], buf, len);
ret = rmi_write_report(hdev, data->writeReport,
data->output_report_size);
if (ret < 0) {
dev_err(&hdev->dev,
"failed to write request output report (%d)\n",
ret);
goto exit;
}
ret = 0;
exit:
mutex_unlock(&data->page_mutex);
return ret;
}
static inline int rmi_write(struct hid_device *hdev, u16 addr, void *buf)
{
return rmi_write_block(hdev, addr, buf, 1);
}
static void rmi_f11_process_touch(struct rmi_data *hdata, int slot,
u8 finger_state, u8 *touch_data)
{