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Platform: x86: chromeos_laptop - Add Pixel Trackpad

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Instantiate the atmel mxt224s trackpad on this system.
The trackpad may appear at two possible addresses:
0x4b in operational mode.
0x25 in bootloader mode.

Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Benson Leung 2013-02-21 12:14:59 -08:00 committed by Matthew Garrett
parent c165b80cfe
commit 8e1ad4c4bf
1 changed files with 29 additions and 0 deletions
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29
drivers/platform/x86/chromeos_laptop.c
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@ -25,6 +25,8 @@
#include <linux/i2c.h>
#include <linux/module.h>
#define ATMEL_TP_I2C_ADDR 0x4b
#define ATMEL_TP_I2C_BL_ADDR 0x25
#define CYAPA_TP_I2C_ADDR 0x67
#define ISL_ALS_I2C_ADDR 0x44
#define TAOS_ALS_I2C_ADDR 0x29
@ -58,6 +60,12 @@ static struct i2c_board_info __initdata tsl2563_als_device = {
I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR),
};
static struct i2c_board_info __initdata atmel_224s_tp_device = {
I2C_BOARD_INFO("atmel_mxt_tp", ATMEL_TP_I2C_ADDR),
.platform_data = NULL,
.flags = I2C_CLIENT_WAKE,
};
static struct i2c_client __init *__add_probed_i2c_device(
const char *name,
int bus,
@ -161,6 +169,19 @@ static int __init setup_cyapa_smbus_tp(const struct dmi_system_id *id)
return 0;
}
static int __init setup_atmel_224s_tp(const struct dmi_system_id *id)
{
const unsigned short addr_list[] = { ATMEL_TP_I2C_BL_ADDR,
ATMEL_TP_I2C_ADDR,
I2C_CLIENT_END };
/* add atmel mxt touchpad on VGA DDC GMBus */
tp = add_probed_i2c_device("trackpad", I2C_ADAPTER_VGADDC,
&atmel_224s_tp_device, addr_list);
return 0;
}
static int __init setup_isl29018_als(const struct dmi_system_id *id)
{
/* add isl29018 light sensor */
@ -191,6 +212,14 @@ static struct dmi_system_id __initdata chromeos_laptop_dmi_table[] = {
},
.callback = setup_cyapa_smbus_tp,
},
{
.ident = "Chromebook Pixel - Touchpad",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
},
.callback = setup_atmel_224s_tp,
},
{
.ident = "Samsung Series 5 550 - Light Sensor",
.matches = {