Binding an I2C device driver

Question

What I am trying to do is run a search against an API (which I have working) and then display the returned information in a table. Below is my code and a mocked up image of what I am trying to achieve plus what I currently see.

JSON

{
    "legalDescription": "Pork & Egg Gala Pie",
    "QUID": [
        "Pork 38%"
    ],
    "warningStatement": [
        "Caution: May contain bone"
    ],
    "GTIN": "0213090000000",
    "allergenInfo": [
        {
            "allergenName": "Contains",
            "allergenValues": "Wheat"
        },
        {
            "allergenName": "Contains",
            "allergenValues": "Egg"
        }
    ],
    "href": "http://product.global.tesco.org:8080/v2/products/counterproducts/0213090000000"
}

AngularJS

$scope.products = [];

    $scope.runCountersSearch = function() {

        $http.get("http://product.global.tesco.org:8080/v2/products/counterproducts/" + $scope.searchInputCounters).success(function(theData) {

            $scope.products.push(theData);
        });

    }

HTML

<tr ng-repeat = "oneProduct in products">
                    <td> {{oneProduct.legalDescription}} </td>
                    <td ng-repeat="quid in oneProduct.QUID"> {{quid.QUID}} </td>
                    <td ng-repeat="warning in oneProduct.warningStatement">{{warning.warningStatement}} </td>
                </tr>
            </table>

What I see What I want to get

Solution

I was missing platform data for this device.

I was able to get it working by inserting the platform data directly into the code for the driver module:

static uint32_t tca8418_km_data[] = {
    KEY(0, 0, KEY_F1),
    KEY(0, 1, KEY_F2),
    KEY(0, 2, KEY_F3),
    ...
};

static const struct matrix_keymap_data tca8418_mk_data = {
    .keymap         = tca8418_km_data,
    .keymap_size    = ARRAY_SIZE(tca8418_km_data),
};

static struct tca8418_keypad_platform_data my_tca8418_plat_data = {
    .keymap_data    = &tca8418_mk_data,
    .rows           = 6,
    .cols           = 8,
    .rep            = 1,
    .irq_is_gpio    = 1,
};

static struct i2c_board_info tca8418_board_info __initdata = {
    I2C_BOARD_INFO("tca8418_keypad", 0x34),
    .platform_data  = &my_tca8418_plat_data,
    .irq            = 16, // GPIO pin 16
};

Then adding this to the __init function:

static int __init tca8418_keypad_init(void)
{
    struct i2c_adapter *i2c_adap;
    i2c_adap = i2c_get_adapter(1);
    i2c_new_device(i2c_adap, &tca8418_board_info);
    ...
}

This is not the most elegant of fixes, but it worked for me. I would have preferred a userspace solution, but I was unable to find one.

Comments

[0andriy]

It should be done via DT or ACPI.