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Input: wdt87xx_i2c - populate vendor and product in input device 

These attributes can be used to identify controllers present in the system.

Signed-off-by: HungNien Chen <hn.chen@weidahitech.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
HungNien Chen 2015-07-09 10:27:02 -07:00 committed by Dmitry Torokhov
parent d48259a0d2
commit d5ebe37e8c
1 changed files with 45 additions and 1 deletions
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46
drivers/input/touchscreen/wdt87xx_i2c.c
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@ -23,7 +23,7 @@
#include <asm/unaligned.h>
#define WDT87XX_NAME "wdt87xx_i2c"
#define WDT87XX_DRV_VER "0.9.6"
#define WDT87XX_DRV_VER "0.9.7"
#define WDT87XX_FW_NAME "wdt87xx_fw.bin"
#define WDT87XX_CFG_NAME "wdt87xx_cfg.bin"
@ -85,6 +85,11 @@
#define CTL_PARAM_OFFSET_PHY_H 24
#define CTL_PARAM_OFFSET_FACTOR 32
/* The definition of the device descriptor */
#define WDT_GD_DEVICE 1
#define DEV_DESC_OFFSET_VID 8
#define DEV_DESC_OFFSET_PID 10
/* Communication commands */
#define PACKET_SIZE 56
#define VND_REQ_READ 0x06
@ -165,6 +170,8 @@ struct wdt87xx_sys_param {
u16 scaling_factor;
u32 max_x;
u32 max_y;
u16 vendor_id;
u16 product_id;
};
struct wdt87xx_data {
@ -208,6 +215,32 @@ static int wdt87xx_i2c_xfer(struct i2c_client *client,
return 0;
}
static int wdt87xx_get_desc(struct i2c_client *client, u8 desc_idx,
u8 *buf, size_t len)
{
u8 tx_buf[] = { 0x22, 0x00, 0x10, 0x0E, 0x23, 0x00 };
int error;
tx_buf[2] |= desc_idx & 0xF;
error = wdt87xx_i2c_xfer(client, tx_buf, sizeof(tx_buf),
buf, len);
if (error) {
dev_err(&client->dev, "get desc failed: %d\n", error);
return error;
}
if (buf[0] != len) {
dev_err(&client->dev, "unexpected response to get desc: %d\n",
buf[0]);
return -EINVAL;
}
mdelay(WDT_COMMAND_DELAY_MS);
return 0;
}
static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx,
u8 *buf, size_t len)
{
@ -403,6 +436,15 @@ static int wdt87xx_get_sysparam(struct i2c_client *client,
u8 buf[PKT_READ_SIZE];
int error;
error = wdt87xx_get_desc(client, WDT_GD_DEVICE, buf, 18);
if (error) {
dev_err(&client->dev, "failed to get device desc\n");
return error;
}
param->vendor_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_VID);
param->product_id = get_unaligned_le16(buf + DEV_DESC_OFFSET_PID);
error = wdt87xx_get_string(client, STRIDX_PARAMETERS, buf, 34);
if (error) {
dev_err(&client->dev, "failed to get parameters\n");
@ -994,6 +1036,8 @@ static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt)
input->name = "WDT87xx Touchscreen";
input->id.bustype = BUS_I2C;
input->id.vendor = wdt->param.vendor_id;
input->id.product = wdt->param.product_id;
input->phys = wdt->phys;
input_set_abs_params(input, ABS_MT_POSITION_X, 0,