Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome...

[firefly-linux-kernel-4.4.55.git] / drivers / platform / chrome / chromeos_laptop.c

diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 67b316b2a2bd8c166facf68a6a50b0806847b140..d866db80b4fdfdf36d48ec02827d2578870778fe 100644 (file)
--- 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. */
@@ -415,6 +503,30 @@ 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 = {
@@ -429,6 +541,13 @@ 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 = {
@@ -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;