summaryrefslogtreecommitdiff
path: root/drivers/platform/chrome/chromeos_laptop.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/platform/chrome/chromeos_laptop.c')
-rw-r--r--drivers/platform/chrome/chromeos_laptop.c140
1 files changed, 130 insertions, 10 deletions
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 67b316b2a2bd..d866db80b4fd 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -37,6 +37,8 @@
#define ISL_ALS_I2C_ADDR 0x44
#define TAOS_ALS_I2C_ADDR 0x29
+#define MAX_I2C_DEVICE_DEFERRALS 5
+
static struct i2c_client *als;
static struct i2c_client *tp;
static struct i2c_client *ts;
@@ -45,6 +47,8 @@ static const char *i2c_adapter_names[] = {
"SMBus I801 adapter",
"i915 gmbus vga",
"i915 gmbus panel",
+ "i2c-designware-pci",
+ "i2c-designware-pci",
};
/* Keep this enum consistent with i2c_adapter_names */
@@ -52,11 +56,21 @@ enum i2c_adapter_type {
I2C_ADAPTER_SMBUS = 0,
I2C_ADAPTER_VGADDC,
I2C_ADAPTER_PANEL,
+ I2C_ADAPTER_DESIGNWARE_0,
+ I2C_ADAPTER_DESIGNWARE_1,
+};
+
+enum i2c_peripheral_state {
+ UNPROBED = 0,
+ PROBED,
+ TIMEDOUT,
};
struct i2c_peripheral {
int (*add)(enum i2c_adapter_type type);
enum i2c_adapter_type type;
+ enum i2c_peripheral_state state;
+ int tries;
};
#define MAX_I2C_PERIPHERALS 3
@@ -158,8 +172,8 @@ static struct i2c_client *__add_probed_i2c_device(
/* add the i2c device */
client = i2c_new_probed_device(adapter, info, addrs, NULL);
if (!client)
- pr_err("%s failed to register device %d-%02x\n",
- __func__, bus, info->addr);
+ pr_notice("%s failed to register device %d-%02x\n",
+ __func__, bus, info->addr);
else
pr_debug("%s added i2c device %d-%02x\n",
__func__, bus, info->addr);
@@ -168,29 +182,43 @@ static struct i2c_client *__add_probed_i2c_device(
return client;
}
+struct i2c_lookup {
+ const char *name;
+ int instance;
+ int n;
+};
+
static int __find_i2c_adap(struct device *dev, void *data)
{
- const char *name = data;
+ struct i2c_lookup *lookup = data;
static const char *prefix = "i2c-";
struct i2c_adapter *adapter;
+
if (strncmp(dev_name(dev), prefix, strlen(prefix)) != 0)
return 0;
adapter = to_i2c_adapter(dev);
- return (strncmp(adapter->name, name, strlen(name)) == 0);
+ if (strncmp(adapter->name, lookup->name, strlen(lookup->name)) == 0 &&
+ lookup->n++ == lookup->instance)
+ return 1;
+ return 0;
}
static int find_i2c_adapter_num(enum i2c_adapter_type type)
{
struct device *dev = NULL;
struct i2c_adapter *adapter;
- const char *name = i2c_adapter_names[type];
+ struct i2c_lookup lookup;
+
+ memset(&lookup, 0, sizeof(lookup));
+ lookup.name = i2c_adapter_names[type];
+ lookup.instance = (type == I2C_ADAPTER_DESIGNWARE_1) ? 1 : 0;
+
/* find the adapter by name */
- dev = bus_find_device(&i2c_bus_type, NULL, (void *)name,
- __find_i2c_adap);
+ dev = bus_find_device(&i2c_bus_type, NULL, &lookup, __find_i2c_adap);
if (!dev) {
/* Adapters may appear later. Deferred probing will retry */
pr_notice("%s: i2c adapter %s not found on system.\n", __func__,
- name);
+ lookup.name);
return -ENODEV;
}
adapter = to_i2c_adapter(dev);
@@ -227,6 +255,7 @@ static struct i2c_client *add_i2c_device(const char *name,
struct i2c_board_info *info)
{
const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END };
+
return __add_probed_i2c_device(name,
find_i2c_adapter_num(type),
info,
@@ -324,9 +353,36 @@ static int chromeos_laptop_probe(struct platform_device *pdev)
if (i2c_dev->add == NULL)
break;
- /* Add the device. Set -EPROBE_DEFER on any failure */
- if (i2c_dev->add(i2c_dev->type))
+ if (i2c_dev->state == TIMEDOUT || i2c_dev->state == PROBED)
+ continue;
+
+ /*
+ * Check that the i2c adapter is present.
+ * -EPROBE_DEFER if missing as the adapter may appear much
+ * later.
+ */
+ if (find_i2c_adapter_num(i2c_dev->type) == -ENODEV) {
ret = -EPROBE_DEFER;
+ continue;
+ }
+
+ /* Add the device. */
+ if (i2c_dev->add(i2c_dev->type) == -EAGAIN) {
+ /*
+ * Set -EPROBE_DEFER a limited num of times
+ * if device is not successfully added.
+ */
+ if (++i2c_dev->tries < MAX_I2C_DEVICE_DEFERRALS) {
+ ret = -EPROBE_DEFER;
+ } else {
+ /* Ran out of tries. */
+ pr_notice("%s: Ran out of tries for device.\n",
+ __func__);
+ i2c_dev->state = TIMEDOUT;
+ }
+ } else {
+ i2c_dev->state = PROBED;
+ }
}
return ret;
@@ -359,6 +415,27 @@ static struct chromeos_laptop chromebook_pixel = {
},
};
+static struct chromeos_laptop hp_chromebook_14 = {
+ .i2c_peripherals = {
+ /* Touchpad. */
+ { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ },
+};
+
+static struct chromeos_laptop dell_chromebook_11 = {
+ .i2c_peripherals = {
+ /* Touchpad. */
+ { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ },
+};
+
+static struct chromeos_laptop toshiba_cb35 = {
+ .i2c_peripherals = {
+ /* Touchpad. */
+ { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ },
+};
+
static struct chromeos_laptop acer_c7_chromebook = {
.i2c_peripherals = {
/* Touchpad. */
@@ -373,6 +450,17 @@ static struct chromeos_laptop acer_ac700 = {
},
};
+static struct chromeos_laptop acer_c720 = {
+ .i2c_peripherals = {
+ /* Touchscreen. */
+ { .add = setup_atmel_1664s_ts, I2C_ADAPTER_DESIGNWARE_1 },
+ /* Touchpad. */
+ { .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ /* Light Sensor. */
+ { .add = setup_isl29018_als, I2C_ADAPTER_DESIGNWARE_1 },
+ },
+};
+
static struct chromeos_laptop hp_pavilion_14_chromebook = {
.i2c_peripherals = {
/* Touchpad. */
@@ -416,6 +504,30 @@ static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
_CBDD(chromebook_pixel),
},
{
+ .ident = "Wolf",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"),
+ },
+ _CBDD(dell_chromebook_11),
+ },
+ {
+ .ident = "HP Chromebook 14",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Falco"),
+ },
+ _CBDD(hp_chromebook_14),
+ },
+ {
+ .ident = "Toshiba CB35",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Leon"),
+ },
+ _CBDD(toshiba_cb35),
+ },
+ {
.ident = "Acer C7 Chromebook",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"),
@@ -430,6 +542,13 @@ static struct dmi_system_id chromeos_laptop_dmi_table[] __initdata = {
_CBDD(acer_ac700),
},
{
+ .ident = "Acer C720",
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
+ },
+ _CBDD(acer_c720),
+ },
+ {
.ident = "HP Pavilion 14 Chromebook",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"),
@@ -460,6 +579,7 @@ static struct platform_driver cros_platform_driver = {
static int __init chromeos_laptop_init(void)
{
int ret;
+
if (!dmi_check_system(chromeos_laptop_dmi_table)) {
pr_debug("%s unsupported system.\n", __func__);
return -ENODEV;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 09:57:59 +0300