[U-Boot] [PATCH v3 7/9] tegra: Add tegra keyboard driver

[Stephen Warren]

On 01/16/2012 11:11 PM, Simon Glass wrote:
> From: Rakesh Iyer <riyer at nvidia.com>
> 
> Add support for internal matrix keyboard controller for Nvidia Tegra platforms.
> This driver uses the fdt decode function to obtain its key codes.
...

> +static uchar *create_keymap(u32 *data, int len, int map_keycode, int *pos)
...
> +               entry = row * KBC_MAX_COL + col;
> +               map[entry] = key_code;

This needs to be range-checked.

> +               if (pos && map_keycode == key_code)
> +                       *pos = entry;
> +       }
> +
> +       return map;
> +}

> +static int fdt_decode_kbc(const void *blob, int node, struct keyb *config)
...
> +               /* Name needs to match "1,<type>keymap" */
> +               debug("%s: property '%s'\n", __func__, name);
> +               if (strncmp(name, "1,", 2) || len < 8 ||
> +                               strcmp(name + len - 6, "keymap"))
> +                       continue;

"linux," not "l,". Why not just strcmp against the two values simply and
directly; the above matches against totally bogus stuff like
"l,bogus-cruft-keymap".

> +
> +               len -= 8;

No need for that right?

> +static int init_tegra_keyboard(void)
...
> +       if (config.fn_keycode) {
> +               if (input_add_table(&config.input, KEY_FN, -1,
> +                                       config.fn_keycode, KBC_KEY_COUNT))
> +                       return -1;
> +       }

I don't see anywhere that calls input_add_table() for config.plain_keycode.

> +int drv_keyboard_init(void)
> +{
> +       struct stdio_dev dev;
> +
> +       if (input_init(&config.input, 0)) {
> +               debug("%s: Cannot set up input\n", __func__);
> +               return -1;
> +       }
> +       config.input.read_keys = tegra_kbc_check;

Don't you want to set up config.input.* before passing it to
input_init() which might in theory use it?

> diff --git a/include/tegra-kbc.h b/include/tegra-kbc.h

> +#define KEY_IS_MODIFIER(key) ((key) >= KEY_FIRST_MODIFIER)

Shouldn't that be in the input layer or the file that defines the key codes?

-- 
nvpublic