Commit 33a84f8a authored by Yufeng Shen's avatar Yufeng Shen Committed by Matthew Garrett
Browse files

Platform: x86: chromeos_laptop - Add Pixel Touchscreen 



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: default avatarYufeng Shen <miletus@chromium.org>
Signed-off-by: default avatarBenson Leung <bleung@chromium.org>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent bcaf089c

drivers/platform/x86/chromeos_laptop.c

+31 −0
Original line number Diff line number Diff line
@@ -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);

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