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Platform: x86: chromeos_laptop - Add Pixel Touchscreen

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Instantiate the atmel mxt1664s touchscreen on this system.
The touchscreen may appear at two possible addresses:
0x4a in operational mode.
0x26 in bootloader mode.

Signed-off-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Yufeng Shen 2013-02-21 12:15:00 -08:00 committed by Matthew Garrett
parent bcaf089c51
commit 33a84f8a76
1 changed files with 31 additions and 0 deletions
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31
drivers/platform/x86/chromeos_laptop.c
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@ -27,12 +27,15 @@
#define ATMEL_TP_I2C_ADDR 0x4b
#define ATMEL_TP_I2C_BL_ADDR 0x25
#define ATMEL_TS_I2C_ADDR 0x4a
#define ATMEL_TS_I2C_BL_ADDR 0x26
#define CYAPA_TP_I2C_ADDR 0x67
#define ISL_ALS_I2C_ADDR 0x44
#define TAOS_ALS_I2C_ADDR 0x29
static struct i2c_client *als;
static struct i2c_client *tp;
static struct i2c_client *ts;
const char *i2c_adapter_names[] = {
"SMBus I801 adapter",
@ -66,6 +69,12 @@ static struct i2c_board_info __initdata atmel_224s_tp_device = {
.flags = I2C_CLIENT_WAKE,
};
static struct i2c_board_info __initdata atmel_1664s_device = {
I2C_BOARD_INFO("atmel_mxt_ts", ATMEL_TS_I2C_ADDR),
.platform_data = NULL,
.flags = I2C_CLIENT_WAKE,
};
static struct i2c_client __init *__add_probed_i2c_device(
const char *name,
int bus,
@ -201,6 +210,18 @@ static int __init setup_atmel_224s_tp(const struct dmi_system_id *id)
return 0;
}
static int __init setup_atmel_1664s_ts(const struct dmi_system_id *id)
{
const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
ATMEL_TS_I2C_ADDR,
I2C_CLIENT_END };
/* add atmel mxt touch device on PANEL GMBus */
ts = add_probed_i2c_device("touchscreen", I2C_ADAPTER_PANEL,
&atmel_1664s_device, addr_list);
return 0;
}
static int __init setup_isl29018_als(const struct dmi_system_id *id)
{
@ -232,6 +253,14 @@ static struct dmi_system_id __initdata chromeos_laptop_dmi_table[] = {
},
.callback = setup_cyapa_smbus_tp,
},
{
.ident = "Chromebook Pixel - Touchscreen",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
},
.callback = setup_atmel_1664s_ts,
},
{
.ident = "Chromebook Pixel - Touchpad",
.matches = {
@ -302,6 +331,8 @@ static void __exit chromeos_laptop_exit(void)
i2c_unregister_device(als);
if (tp)
i2c_unregister_device(tp);
if (ts)
i2c_unregister_device(ts);
}
module_init(chromeos_laptop_init);